Hello, syzbot found the following issue on:
HEAD commit: ba5cc80fd326 Merge branch 'for-next/core' into for-kernelci git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci console output: https://syzkaller.appspot.com/x/log.txt?x=10a75079580000 kernel config: https://syzkaller.appspot.com/x/.config?x=ccf4bea59f67007 dashboard link: https://syzkaller.appspot.com/bug?extid=4d3143c8e28f6266c636 compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 userspace arch: arm64 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/959ad5f4e730/disk-ba5cc80f.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/0787d25f251e/vmlinux-ba5cc80f.xz kernel image: https://storage.googleapis.com/syzbot-assets/2e85c36fabac/Image-ba5cc80f.gz.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: [email protected] Unable to handle kernel paging request at virtual address dfff800000000000 KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] Mem abort info: ESR = 0x0000000096000005 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x05: level 1 translation fault Data abort info: ISV = 0, ISS = 0x00000005, ISS2 = 0x00000000 CM = 0, WnR = 0, TnD = 0, TagAccess = 0 GCS = 0, Overlay = 0, DirtyBit = 0 [dfff800000000000] address between user and kernel address ranges Internal error: Oops: 0000000096000005 [#1] SMP Instance 9�G �̌83��s]t4 ��Ķy�G|aJ� ��VF��8V$m��7To0FO�P�p ��6�O %�DZ�rf0 not found Modules linked in: CPU: 1 UID: 0 PID: 15930 Comm: syz.7.4873 Tainted: G L syzkaller #0 PREEMPT Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : strcmp+0x28/0xf0 lib/string.c:265 lr : remove_cache_mod kernel/trace/trace_events.c:948 [inline] lr : cache_mod kernel/trace/trace_events.c:977 [inline] lr : __ftrace_set_clr_event_nolock+0x6a0/0x940 kernel/trace/trace_events.c:1395 sp : ffff800093567840 x29: ffff800093567870 x28: dfff800000000000 x27: 0000000000000000 x26: ffff800088d6e8b0 x25: ffff0000c71e0580 x24: 00000000ffffffea x23: ffff800088d6e8b0 x22: 0000000000000000 x21: dfff800000000000 x20: ffff0000c71e0598 x19: ffff0000d4e7e4a0 x18: 0000000000000000 x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000001 x14: 0000000000000000 x13: 0000000000000000 x12: 0000000000000000 x11: 0000000000000000 x10: dfff800000000000 x9 : ffff0000d2e90f01 x8 : 0000000000000000 x7 : ffff800080538ea0 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000806c6790 x2 : 0000000000000000 x1 : ffff0000d2e90f01 x0 : 0000000000000000 Call trace: strcmp+0x28/0xf0 lib/string.c:265 (P) remove_cache_mod kernel/trace/trace_events.c:948 [inline] cache_mod kernel/trace/trace_events.c:977 [inline] __ftrace_set_clr_event_nolock+0x6a0/0x940 kernel/trace/trace_events.c:1395 __ftrace_set_clr_event+0xa8/0xec kernel/trace/trace_events.c:1410 ftrace_set_clr_event+0x2a0/0x438 kernel/trace/trace_events.c:1460 ftrace_event_write+0x1dc/0x28c kernel/trace/trace_events.c:1548 vfs_write+0x2a4/0xa0c fs/read_write.c:685 ksys_write+0x12c/0x228 fs/read_write.c:739 __do_sys_write fs/read_write.c:750 [inline] __se_sys_write fs/read_write.c:747 [inline] __arm64_sys_write+0x84/0x98 fs/read_write.c:747 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140 el0_svc+0x64/0x260 arch/arm64/kernel/entry-common.c:738 el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:757 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:590 Code: aa0103e9 f2fbffea d343fc0b 1200080c (38ea696b) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: aa0103e9 mov x9, x1 4: f2fbffea movk x10, #0xdfff, lsl #48 8: d343fc0b lsr x11, x0, #3 c: 1200080c and w12, w0, #0x7 * 10: 38ea696b ldrsb w11, [x11, x10] <-- trapping instruction --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at [email protected]. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
