#syz dup: KASAN: slab-use-after-free Read in z_erofs_decompress_queue
On 2024/12/9 19:22, syzbot wrote:
Hello,
syzbot found the following issue on:
HEAD commit: b86545e02e8c Merge tag 'acpi-6.13-rc1-2' of git://git.kern..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=137b1f5f980000
kernel config: https://syzkaller.appspot.com/x/.config?x=e550a68d9f2e11a3
dashboard link: https://syzkaller.appspot.com/bug?extid=06bfc1fda6094b0755f0
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian)
2.40
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image:
https://storage.googleapis.com/syzbot-assets/f4d196047218/disk-b86545e0.raw.xz
vmlinux:
https://storage.googleapis.com/syzbot-assets/be50bc18d79a/vmlinux-b86545e0.xz
kernel image:
https://storage.googleapis.com/syzbot-assets/8b6adb7024e6/bzImage-b86545e0.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+06bfc1fda6094b075...@syzkaller.appspotmail.com
erofs (device loop4): failed to decompress -26 in[46, 0] out[9000]
==================================================================
BUG: KASAN: slab-use-after-free in instrument_atomic_read
include/linux/instrumented.h:68 [inline]
BUG: KASAN: slab-use-after-free in atomic_read
include/linux/atomic/atomic-instrumented.h:32 [inline]
BUG: KASAN: slab-use-after-free in queued_spin_trylock
include/asm-generic/qspinlock.h:92 [inline]
BUG: KASAN: slab-use-after-free in do_raw_spin_trylock+0x66/0x180
kernel/locking/spinlock_debug.c:123
Read of size 4 at addr ffff888034ece0b0 by task kworker/u9:5/5868
CPU: 0 UID: 0 PID: 5868 Comm: kworker/u9:5 Not tainted
6.12.0-syzkaller-10553-gb86545e02e8c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google
09/13/2024
Workqueue: erofs_worker z_erofs_decompressqueue_work
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:378 [inline]
print_report+0xc3/0x620 mm/kasan/report.c:489
kasan_report+0xd9/0x110 mm/kasan/report.c:602
check_region_inline mm/kasan/generic.c:183 [inline]
kasan_check_range+0xef/0x1a0 mm/kasan/generic.c:189
instrument_atomic_read include/linux/instrumented.h:68 [inline]
atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline]
queued_spin_trylock include/asm-generic/qspinlock.h:92 [inline]
do_raw_spin_trylock+0x66/0x180 kernel/locking/spinlock_debug.c:123
__raw_spin_trylock include/linux/spinlock_api_smp.h:89 [inline]
_raw_spin_trylock+0x1b/0x80 kernel/locking/spinlock.c:138
spin_trylock include/linux/spinlock.h:361 [inline]
z_erofs_put_pcluster.part.0+0x112/0x200 fs/erofs/zdata.c:959
z_erofs_put_pcluster fs/erofs/zdata.c:1403 [inline]
z_erofs_decompress_pcluster fs/erofs/zdata.c:1403 [inline]
z_erofs_decompress_queue+0x226a/0x27f0 fs/erofs/zdata.c:1425
z_erofs_decompressqueue_work+0x77/0xb0 fs/erofs/zdata.c:1437
process_one_work+0x9c8/0x1ba0 kernel/workqueue.c:3229
process_scheduled_works kernel/workqueue.c:3310 [inline]
worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391
kthread+0x2c4/0x3a0 kernel/kthread.c:389
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
</TASK>
Allocated by task 9350:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
__kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394
kmalloc_noprof include/linux/slab.h:901 [inline]
kzalloc_noprof include/linux/slab.h:1037 [inline]
erofs_init_fs_context+0x47/0x3a0 fs/erofs/super.c:790
alloc_fs_context+0x54d/0x9c0 fs/fs_context.c:318
do_new_mount fs/namespace.c:3486 [inline]
path_mount+0xb08/0x1f20 fs/namespace.c:3834
do_mount fs/namespace.c:3847 [inline]
__do_sys_mount fs/namespace.c:4057 [inline]
__se_sys_mount fs/namespace.c:4034 [inline]
__x64_sys_mount+0x294/0x320 fs/namespace.c:4034
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 5850:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:582
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x51/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2338 [inline]
slab_free mm/slub.c:4598 [inline]
kfree+0x14f/0x4b0 mm/slub.c:4746
erofs_kill_sb+0x1a5/0x240 fs/erofs/super.c:824
deactivate_locked_super+0xc1/0x1a0 fs/super.c:473
deactivate_super+0xde/0x100 fs/super.c:506
cleanup_mnt+0x222/0x450 fs/namespace.c:1373
task_work_run+0x151/0x250 kernel/task_work.c:239
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x27b/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff888034ece000
which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 176 bytes inside of
freed 1024-byte region [ffff888034ece000, ffff888034ece400)
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x34ec8
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
anon flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff88801b041dc0 0000000000000000 dead000000000001
raw: 0000000000000000 0000000000100010 00000001f5000000 0000000000000000
head: 00fff00000000040 ffff88801b041dc0 0000000000000000 dead000000000001
head: 0000000000000000 0000000000100010 00000001f5000000 0000000000000000
head: 00fff00000000003 ffffea0000d3b201 ffffffffffffffff 0000000000000000
head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask
0x52820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 6062, tgid 6062
(kworker/u8:10), ts 164036055360, free_ts 158527873125
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1556
prep_new_page mm/page_alloc.c:1564 [inline]
get_page_from_freelist+0xfce/0x2f80 mm/page_alloc.c:3474
__alloc_pages_noprof+0x223/0x25a0 mm/page_alloc.c:4751
alloc_pages_mpol_noprof+0x2c9/0x610 mm/mempolicy.c:2265
alloc_slab_page mm/slub.c:2408 [inline]
allocate_slab mm/slub.c:2574 [inline]
new_slab+0x2c9/0x410 mm/slub.c:2627
___slab_alloc+0xdac/0x1870 mm/slub.c:3815
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3905
__slab_alloc_node mm/slub.c:3980 [inline]
slab_alloc_node mm/slub.c:4141 [inline]
__do_kmalloc_node mm/slub.c:4282 [inline]
__kmalloc_noprof+0x2ec/0x510 mm/slub.c:4295
kmalloc_noprof include/linux/slab.h:905 [inline]
kzalloc_noprof include/linux/slab.h:1037 [inline]
ieee802_11_parse_elems_full+0xea/0x1680 net/mac80211/parse.c:958
ieee802_11_parse_elems_crc net/mac80211/ieee80211_i.h:2386 [inline]
ieee802_11_parse_elems net/mac80211/ieee80211_i.h:2393 [inline]
ieee80211_inform_bss+0xfd/0x1100 net/mac80211/scan.c:79
rdev_inform_bss net/wireless/rdev-ops.h:418 [inline]
cfg80211_inform_single_bss_data+0x8f9/0x1de0 net/wireless/scan.c:2334
cfg80211_inform_bss_data+0x205/0x3ba0 net/wireless/scan.c:3189
cfg80211_inform_bss_frame_data+0x272/0x7a0 net/wireless/scan.c:3284
ieee80211_bss_info_update+0x311/0xab0 net/mac80211/scan.c:226
ieee80211_rx_bss_info net/mac80211/ibss.c:1101 [inline]
ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1580 [inline]
ieee80211_ibss_rx_queued_mgmt+0x189c/0x2f50 net/mac80211/ibss.c:1607
ieee80211_iface_process_skb net/mac80211/iface.c:1616 [inline]
ieee80211_iface_work+0xc0b/0xf00 net/mac80211/iface.c:1670
page last free pid 6620 tgid 6619 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1127 [inline]
free_unref_page+0x661/0x1080 mm/page_alloc.c:2657
__put_partials+0x14c/0x170 mm/slub.c:3142
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x4e/0x120 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:329
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4104 [inline]
slab_alloc_node mm/slub.c:4153 [inline]
__do_kmalloc_node mm/slub.c:4282 [inline]
__kmalloc_noprof+0x1cd/0x510 mm/slub.c:4295
kmalloc_noprof include/linux/slab.h:905 [inline]
tomoyo_realpath_from_path+0xb9/0x720 security/tomoyo/realpath.c:251
tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
tomoyo_path_number_perm+0x248/0x590 security/tomoyo/file.c:723
security_file_ioctl+0x9b/0x240 security/security.c:2908
__do_sys_ioctl fs/ioctl.c:900 [inline]
__se_sys_ioctl fs/ioctl.c:892 [inline]
__x64_sys_ioctl+0xb7/0x200 fs/ioctl.c:892
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Memory state around the buggy address:
ffff888034ecdf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888034ece000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888034ece080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888034ece100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888034ece180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
==================================================================
BUG: KASAN: slab-use-after-free in arch_atomic_read
arch/x86/include/asm/atomic.h:23 [inline]
BUG: KASAN: slab-use-after-free in raw_atomic_read
include/linux/atomic/atomic-arch-fallback.h:457 [inline]
BUG: KASAN: slab-use-after-free in atomic_read
include/linux/atomic/atomic-instrumented.h:33 [inline]
BUG: KASAN: slab-use-after-free in queued_spin_trylock
include/asm-generic/qspinlock.h:92 [inline]
BUG: KASAN: slab-use-after-free in do_raw_spin_trylock+0x164/0x180
kernel/locking/spinlock_debug.c:123
Read of size 4 at addr ffff888034ece0b0 by task kworker/u9:5/5868
CPU: 0 UID: 0 PID: 5868 Comm: kworker/u9:5 Tainted: G B
6.12.0-syzkaller-10553-gb86545e02e8c #0
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google
09/13/2024
Workqueue: erofs_worker z_erofs_decompressqueue_work
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:378 [inline]
print_report+0xc3/0x620 mm/kasan/report.c:489
kasan_report+0xd9/0x110 mm/kasan/report.c:602
arch_atomic_read arch/x86/include/asm/atomic.h:23 [inline]
raw_atomic_read include/linux/atomic/atomic-arch-fallback.h:457 [inline]
atomic_read include/linux/atomic/atomic-instrumented.h:33 [inline]
queued_spin_trylock include/asm-generic/qspinlock.h:92 [inline]
do_raw_spin_trylock+0x164/0x180 kernel/locking/spinlock_debug.c:123
__raw_spin_trylock include/linux/spinlock_api_smp.h:89 [inline]
_raw_spin_trylock+0x1b/0x80 kernel/locking/spinlock.c:138
spin_trylock include/linux/spinlock.h:361 [inline]
z_erofs_put_pcluster.part.0+0x112/0x200 fs/erofs/zdata.c:959
z_erofs_put_pcluster fs/erofs/zdata.c:1403 [inline]
z_erofs_decompress_pcluster fs/erofs/zdata.c:1403 [inline]
z_erofs_decompress_queue+0x226a/0x27f0 fs/erofs/zdata.c:1425
z_erofs_decompressqueue_work+0x77/0xb0 fs/erofs/zdata.c:1437
process_one_work+0x9c8/0x1ba0 kernel/workqueue.c:3229
process_scheduled_works kernel/workqueue.c:3310 [inline]
worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391
kthread+0x2c4/0x3a0 kernel/kthread.c:389
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
</TASK>
Allocated by task 9350:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
__kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394
kmalloc_noprof include/linux/slab.h:901 [inline]
kzalloc_noprof include/linux/slab.h:1037 [inline]
erofs_init_fs_context+0x47/0x3a0 fs/erofs/super.c:790
alloc_fs_context+0x54d/0x9c0 fs/fs_context.c:318
do_new_mount fs/namespace.c:3486 [inline]
path_mount+0xb08/0x1f20 fs/namespace.c:3834
do_mount fs/namespace.c:3847 [inline]
__do_sys_mount fs/namespace.c:4057 [inline]
__se_sys_mount fs/namespace.c:4034 [inline]
__x64_sys_mount+0x294/0x320 fs/namespace.c:4034
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 5850:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:582
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x51/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2338 [inline]
slab_free mm/slub.c:4598 [inline]
kfree+0x14f/0x4b0 mm/slub.c:4746
erofs_kill_sb+0x1a5/0x240 fs/erofs/super.c:824
deactivate_locked_super+0xc1/0x1a0 fs/super.c:473
deactivate_super+0xde/0x100 fs/super.c:506
cleanup_mnt+0x222/0x450 fs/namespace.c:1373
task_work_run+0x151/0x250 kernel/task_work.c:239
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x27b/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff888034ece000
which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 176 bytes inside of
freed 1024-byte region [ffff888034ece000, ffff888034ece400)
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x34ec8
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
anon flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff88801b041dc0 0000000000000000 dead000000000001
raw: 0000000000000000 0000000000100010 00000001f5000000 0000000000000000
head: 00fff00000000040 ffff88801b041dc0 0000000000000000 dead000000000001
head: 0000000000000000 0000000000100010 00000001f5000000 0000000000000000
head: 00fff00000000003 ffffea0000d3b201 ffffffffffffffff 0000000000000000
head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask
0x52820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 6062, tgid 6062
(kworker/u8:10), ts 164036055360, free_ts 158527873125
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1556
prep_new_page mm/page_alloc.c:1564 [inline]
get_page_from_freelist+0xfce/0x2f80 mm/page_alloc.c:3474
__alloc_pages_noprof+0x223/0x25a0 mm/page_alloc.c:4751
alloc_pages_mpol_noprof+0x2c9/0x610 mm/mempolicy.c:2265
alloc_slab_page mm/slub.c:2408 [inline]
allocate_slab mm/slub.c:2574 [inline]
new_slab+0x2c9/0x410 mm/slub.c:2627
___slab_alloc+0xdac/0x1870 mm/slub.c:3815
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3905
__slab_alloc_node mm/slub.c:3980 [inline]
slab_alloc_node mm/slub.c:4141 [inline]
__do_kmalloc_node mm/slub.c:4282 [inline]
__kmalloc_noprof+0x2ec/0x510 mm/slub.c:4295
kmalloc_noprof include/linux/slab.h:905 [inline]
kzalloc_noprof include/linux/slab.h:1037 [inline]
ieee802_11_parse_elems_full+0xea/0x1680 net/mac80211/parse.c:958
ieee802_11_parse_elems_crc net/mac80211/ieee80211_i.h:2386 [inline]
ieee802_11_parse_elems net/mac80211/ieee80211_i.h:2393 [inline]
ieee80211_inform_bss+0xfd/0x1100 net/mac80211/scan.c:79
rdev_inform_bss net/wireless/rdev-ops.h:418 [inline]
cfg80211_inform_single_bss_data+0x8f9/0x1de0 net/wireless/scan.c:2334
cfg80211_inform_bss_data+0x205/0x3ba0 net/wireless/scan.c:3189
cfg80211_inform_bss_frame_data+0x272/0x7a0 net/wireless/scan.c:3284
ieee80211_bss_info_update+0x311/0xab0 net/mac80211/scan.c:226
ieee80211_rx_bss_info net/mac80211/ibss.c:1101 [inline]
ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1580 [inline]
ieee80211_ibss_rx_queued_mgmt+0x189c/0x2f50 net/mac80211/ibss.c:1607
ieee80211_iface_process_skb net/mac80211/iface.c:1616 [inline]
ieee80211_iface_work+0xc0b/0xf00 net/mac80211/iface.c:1670
page last free pid 6620 tgid 6619 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1127 [inline]
free_unref_page+0x661/0x1080 mm/page_alloc.c:2657
__put_partials+0x14c/0x170 mm/slub.c:3142
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x4e/0x120 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:329
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4104 [inline]
slab_alloc_node mm/slub.c:4153 [inline]
__do_kmalloc_node mm/slub.c:4282 [inline]
__kmalloc_noprof+0x1cd/0x510 mm/slub.c:4295
kmalloc_noprof include/linux/slab.h:905 [inline]
tomoyo_realpath_from_path+0xb9/0x720 security/tomoyo/realpath.c:251
tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
tomoyo_path_number_perm+0x248/0x590 security/tomoyo/file.c:723
security_file_ioctl+0x9b/0x240 security/security.c:2908
__do_sys_ioctl fs/ioctl.c:900 [inline]
__se_sys_ioctl fs/ioctl.c:892 [inline]
__x64_sys_ioctl+0xb7/0x200 fs/ioctl.c:892
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Memory state around the buggy address:
ffff888034ecdf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888034ece000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888034ece080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888034ece100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888034ece180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
==================================================================
BUG: KASAN: slab-use-after-free in instrument_atomic_read_write
include/linux/instrumented.h:96 [inline]
BUG: KASAN: slab-use-after-free in atomic_try_cmpxchg_acquire
include/linux/atomic/atomic-instrumented.h:1300 [inline]
BUG: KASAN: slab-use-after-free in queued_spin_trylock
include/asm-generic/qspinlock.h:97 [inline]
BUG: KASAN: slab-use-after-free in do_raw_spin_trylock+0xa2/0x180
kernel/locking/spinlock_debug.c:123
Write of size 4 at addr ffff888034ece0b0 by task kworker/u9:5/5868
CPU: 0 UID: 0 PID: 5868 Comm: kworker/u9:5 Tainted: G B
6.12.0-syzkaller-10553-gb86545e02e8c #0
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google
09/13/2024
Workqueue: erofs_worker z_erofs_decompressqueue_work
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:378 [inline]
print_report+0xc3/0x620 mm/kasan/report.c:489
kasan_report+0xd9/0x110 mm/kasan/report.c:602
check_region_inline mm/kasan/generic.c:183 [inline]
kasan_check_range+0xef/0x1a0 mm/kasan/generic.c:189
instrument_atomic_read_write include/linux/instrumented.h:96 [inline]
atomic_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:1300
[inline]
queued_spin_trylock include/asm-generic/qspinlock.h:97 [inline]
do_raw_spin_trylock+0xa2/0x180 kernel/locking/spinlock_debug.c:123
__raw_spin_trylock include/linux/spinlock_api_smp.h:89 [inline]
_raw_spin_trylock+0x1b/0x80 kernel/locking/spinlock.c:138
spin_trylock include/linux/spinlock.h:361 [inline]
z_erofs_put_pcluster.part.0+0x112/0x200 fs/erofs/zdata.c:959
z_erofs_put_pcluster fs/erofs/zdata.c:1403 [inline]
z_erofs_decompress_pcluster fs/erofs/zdata.c:1403 [inline]
z_erofs_decompress_queue+0x226a/0x27f0 fs/erofs/zdata.c:1425
z_erofs_decompressqueue_work+0x77/0xb0 fs/erofs/zdata.c:1437
process_one_work+0x9c8/0x1ba0 kernel/workqueue.c:3229
process_scheduled_works kernel/workqueue.c:3310 [inline]
worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391
kthread+0x2c4/0x3a0 kernel/kthread.c:389
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
</TASK>
Allocated by task 9350:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
__kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394
kmalloc_noprof include/linux/slab.h:901 [inline]
kzalloc_noprof include/linux/slab.h:1037 [inline]
erofs_init_fs_context+0x47/0x3a0 fs/erofs/super.c:790
alloc_fs_context+0x54d/0x9c0 fs/fs_context.c:318
do_new_mount fs/namespace.c:3486 [inline]
path_mount+0xb08/0x1f20 fs/namespace.c:3834
do_mount fs/namespace.c:3847 [inline]
__do_sys_mount fs/namespace.c:4057 [inline]
__se_sys_mount fs/namespace.c:4034 [inline]
__x64_sys_mount+0x294/0x320 fs/namespace.c:4034
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 5850:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:582
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x51/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2338 [inline]
slab_free mm/slub.c:4598 [inline]
kfree+0x14f/0x4b0 mm/slub.c:4746
erofs_kill_sb+0x1a5/0x240 fs/erofs/super.c:824
deactivate_locked_super+0xc1/0x1a0 fs/super.c:473
deactivate_super+0xde/0x100 fs/super.c:506
cleanup_mnt+0x222/0x450 fs/namespace.c:1373
task_work_run+0x151/0x250 kernel/task_work.c:239
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x27b/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff888034ece000
which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 176 bytes inside of
freed 1024-byte region [ffff888034ece000, ffff888034ece400)
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x34ec8
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
anon flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff88801b041dc0 0000000000000000 dead000000000001
raw: 0000000000000000 0000000000100010 00000001f5000000 0000000000000000
head: 00fff00000000040 ffff88801b041dc0 0000000000000000 dead000000000001
head: 0000000000000000 0000000000100010 00000001f5000000 0000000000000000
head: 00fff00000000003 ffffea0000d3b201 ffffffffffffffff 0000000000000000
head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask
0x52820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 6062, tgid 6062
(kworker/u8:10), ts 164036055360, free_ts 158527873125
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1556
prep_new_page mm/page_alloc.c:1564 [inline]
get_page_from_freelist+0xfce/0x2f80 mm/page_alloc.c:3474
__alloc_pages_noprof+0x223/0x25a0 mm/page_alloc.c:4751
alloc_pages_mpol_noprof+0x2c9/0x610 mm/mempolicy.c:2265
alloc_slab_page mm/slub.c:2408 [inline]
allocate_slab mm/slub.c:2574 [inline]
new_slab+0x2c9/0x410 mm/slub.c:2627
___slab_alloc+0xdac/0x1870 mm/slub.c:3815
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3905
__slab_alloc_node mm/slub.c:3980 [inline]
slab_alloc_node mm/slub.c:4141 [inline]
__do_kmalloc_node mm/slub.c:4282 [inline]
__kmalloc_noprof+0x2ec/0x510 mm/slub.c:4295
kmalloc_noprof include/linux/slab.h:905 [inline]
kzalloc_noprof include/linux/slab.h:1037 [inline]
ieee802_11_parse_elems_full+0xea/0x1680 net/mac80211/parse.c:958
ieee802_11_parse_elems_crc net/mac80211/ieee80211_i.h:2386 [inline]
ieee802_11_parse_elems net/mac80211/ieee80211_i.h:2393 [inline]
ieee80211_inform_bss+0xfd/0x1100 net/mac80211/scan.c:79
rdev_inform_bss net/wireless/rdev-ops.h:418 [inline]
cfg80211_inform_single_bss_data+0x8f9/0x1de0 net/wireless/scan.c:2334
cfg80211_inform_bss_data+0x205/0x3ba0 net/wireless/scan.c:3189
cfg80211_inform_bss_frame_data+0x272/0x7a0 net/wireless/scan.c:3284
ieee80211_bss_info_update+0x311/0xab0 net/mac80211/scan.c:226
ieee80211_rx_bss_info net/mac80211/ibss.c:1101 [inline]
ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1580 [inline]
ieee80211_ibss_rx_queued_mgmt+0x189c/0x2f50 net/mac80211/ibss.c:1607
ieee80211_iface_process_skb net/mac80211/iface.c:1616 [inline]
ieee80211_iface_work+0xc0b/0xf00 net/mac80211/iface.c:1670
page last free pid 6620 tgid 6619 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1127 [inline]
free_unref_page+0x661/0x1080 mm/page_alloc.c:2657
__put_partials+0x14c/0x170 mm/slub.c:3142
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x4e/0x120 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:329
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4104 [inline]
slab_alloc_node mm/slub.c:4153 [inline]
__do_kmalloc_node mm/slub.c:4282 [inline]
__kmalloc_noprof+0x1cd/0x510 mm/slub.c:4295
kmalloc_noprof include/linux/slab.h:905 [inline]
tomoyo_realpath_from_path+0xb9/0x720 security/tomoyo/realpath.c:251
tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
tomoyo_path_number_perm+0x248/0x590 security/tomoyo/file.c:723
security_file_ioctl+0x9b/0x240 security/security.c:2908
__do_sys_ioctl fs/ioctl.c:900 [inline]
__se_sys_ioctl fs/ioctl.c:892 [inline]
__x64_sys_ioctl+0xb7/0x200 fs/ioctl.c:892
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Memory state around the buggy address:
ffff888034ecdf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888034ece000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888034ece080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888034ece100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888034ece180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
---
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