On Wed, Nov 1, 2017 at 9:48 PM, syzbot <bot+abb66e15eb1b298dfe4a13375f18a278d5940...@syzkaller.appspotmail.com> wrote: > Hello, > > syzkaller hit the following crash on > 720bbe532b7c8f5613b48dea627fc58ed9ace707 > git://git.cmpxchg.org/linux-mmots.git/master > compiler: gcc (GCC) 7.1.1 20170620 > .config is attached > Raw console output is attached. > C reproducer is attached > syzkaller reproducer is attached. See https://goo.gl/kgGztJ > for information about syzkaller reproducers
This also happens on more recent commits, including linux-next 36ef71cae353f88fd6e095e2aaa3e5953af1685d (Oct 20): syz0: caps=(0x00000400000058c1, 0x0000000000000000) len=4203 data_len=2810 gso_size=8465 gso_type=3 ip_summed=0 ------------[ cut here ]------------ WARNING: CPU: 0 PID: 3473 at net/core/dev.c:2618 skb_warn_bad_offload.cold.139+0x224/0x261 net/core/dev.c:2613 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 3473 Comm: a.out Not tainted 4.14.0-rc5-next-20171018 #15 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:16 [inline] dump_stack+0x1a8/0x272 lib/dump_stack.c:52 panic+0x21e/0x4b7 kernel/panic.c:183 __warn.cold.6+0x182/0x187 kernel/panic.c:546 report_bug+0x232/0x330 lib/bug.c:183 fixup_bug+0x3f/0x90 arch/x86/kernel/traps.c:177 do_trap_no_signal arch/x86/kernel/traps.c:211 [inline] do_trap+0x132/0x280 arch/x86/kernel/traps.c:260 do_error_trap+0x11f/0x390 arch/x86/kernel/traps.c:297 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:310 invalid_op+0x18/0x20 arch/x86/entry/entry_64.S:905 RIP: 0010:skb_warn_bad_offload.cold.139+0x224/0x261 net/core/dev.c:2613 RSP: 0018:ffff880064797038 EFLAGS: 00010286 RAX: 000000000000006f RBX: ffff88006365efe8 RCX: 0000000000000000 RDX: 000000000000006f RSI: ffffffff815c88c1 RDI: ffffed000c8f2dfd RBP: ffff880064797090 R08: ffff8800686f86c0 R09: 0000000000000002 R10: ffff8800686f86c0 R11: 0000000000000000 R12: ffff8800538b1680 R13: 0000000000000000 R14: ffff8800538b1680 R15: 0000000000002111 __skb_gso_segment+0x69e/0x860 net/core/dev.c:2824 skb_gso_segment include/linux/netdevice.h:3971 [inline] validate_xmit_skb+0x29f/0xca0 net/core/dev.c:3074 validate_xmit_skb_list+0xb7/0x120 net/core/dev.c:3125 sch_direct_xmit+0x5b5/0x710 net/sched/sch_generic.c:181 __dev_xmit_skb net/core/dev.c:3206 [inline] __dev_queue_xmit+0x1e41/0x2350 net/core/dev.c:3473 dev_queue_xmit+0x17/0x20 net/core/dev.c:3538 packet_snd net/packet/af_packet.c:2956 [inline] packet_sendmsg+0x487a/0x64b0 net/packet/af_packet.c:2981 sock_sendmsg_nosec net/socket.c:632 [inline] sock_sendmsg+0xd2/0x120 net/socket.c:642 ___sys_sendmsg+0x7cc/0x900 net/socket.c:2048 __sys_sendmsg+0xe6/0x220 net/socket.c:2082 SYSC_sendmsg net/socket.c:2093 [inline] SyS_sendmsg+0x36/0x60 net/socket.c:2089 entry_SYSCALL_64_fastpath+0x1f/0xbe RIP: 0033:0x44bab9 RSP: 002b:00000000007eff18 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000020001046 RCX: 000000000044bab9 RDX: 0000000000004010 RSI: 00000000207fcfc8 RDI: 0000000000000004 RBP: 0000000000000086 R08: 850b2da14d2a3706 R09: 0000000000000000 R10: 1b91126b7f398aaa R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000407950 R14: 00000000004079e0 R15: 0000000000000000 > ------------[ cut here ]------------ > WARNING: CPU: 0 PID: 2986 at net/core/dev.c:2585 > skb_warn_bad_offload+0x2a9/0x380 net/core/dev.c:2580 > Kernel panic - not syncing: panic_on_warn set ... > > CPU: 0 PID: 2986 Comm: syzkaller546001 Not tainted 4.13.0-mm1+ #7 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS > Google 01/01/2011 > Call Trace: > __dump_stack lib/dump_stack.c:16 [inline] > dump_stack+0x194/0x257 lib/dump_stack.c:52 > panic+0x1e4/0x417 kernel/panic.c:181 > __warn+0x1c4/0x1d9 kernel/panic.c:542 > report_bug+0x211/0x2d0 lib/bug.c:183 > fixup_bug+0x40/0x90 arch/x86/kernel/traps.c:178 > do_trap_no_signal arch/x86/kernel/traps.c:212 [inline] > do_trap+0x260/0x390 arch/x86/kernel/traps.c:261 > do_error_trap+0x120/0x390 arch/x86/kernel/traps.c:298 > do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:311 > invalid_op+0x18/0x20 arch/x86/entry/entry_64.S:905 > RIP: 0010:skb_warn_bad_offload+0x2a9/0x380 net/core/dev.c:2580 > RSP: 0018:ffff8801ce73f0a0 EFLAGS: 00010282 > RAX: 000000000000006f RBX: ffff8801cd84cde0 RCX: 0000000000000000 > RDX: 000000000000006f RSI: 1ffff10039ce7dd4 RDI: ffffed0039ce7e08 > RBP: ffff8801ce73f0f8 R08: ffff8801ce73e790 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801ce7802c0 > R13: 0000000000000000 R14: ffff8801ce7802c0 R15: 0000000000002111 > __skb_gso_segment+0x607/0x7f0 net/core/dev.c:2791 > skb_gso_segment include/linux/netdevice.h:3951 [inline] > validate_xmit_skb+0x4ba/0xb20 net/core/dev.c:3041 > validate_xmit_skb_list+0xb7/0x120 net/core/dev.c:3092 > sch_direct_xmit+0x3b6/0x6d0 net/sched/sch_generic.c:181 > __dev_xmit_skb net/core/dev.c:3173 [inline] > __dev_queue_xmit+0x15fe/0x1e40 net/core/dev.c:3440 > dev_queue_xmit+0x17/0x20 net/core/dev.c:3505 > packet_snd net/packet/af_packet.c:2950 [inline] > packet_sendmsg+0x3bbf/0x6030 net/packet/af_packet.c:2975 > sock_sendmsg_nosec net/socket.c:633 [inline] > sock_sendmsg+0xca/0x110 net/socket.c:643 > ___sys_sendmsg+0x75b/0x8a0 net/socket.c:2049 > __sys_sendmsg+0xe5/0x210 net/socket.c:2083 > SYSC_sendmsg net/socket.c:2094 [inline] > SyS_sendmsg+0x2d/0x50 net/socket.c:2090 > entry_SYSCALL_64_fastpath+0x1f/0xbe > RIP: 0033:0x445489 > RSP: 002b:00000000007efe68 EFLAGS: 00000217 ORIG_RAX: 000000000000002e > RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000445489 > RDX: 0000000000004010 RSI: 00000000207fcfc8 RDI: 0000000000000004 > RBP: 0000000000000082 R08: 000000000000cdf3 R09: 000000000000cdf3 > R10: 0000000000000004 R11: 0000000000000217 R12: 0000000000402ae0 > R13: 0000000000402b70 R14: 0000000000000000 R15: 0000000000000000 > Dumping ftrace buffer: > (ftrace buffer empty) > Kernel Offset: disabled > Rebooting in 86400 seconds.. > > > --- > This bug is generated by a dumb bot. It may contain errors. > See https://goo.gl/tpsmEJ for details. > Direct all questions to syzkal...@googlegroups.com. > Please credit me with: Reported-by: syzbot <syzkal...@googlegroups.com> > > syzbot will keep track of this bug report. > Once a fix for this bug is committed, please reply to this email with: > #syz fix: exact-commit-title > To mark this as a duplicate of another syzbot report, please reply with: > #syz dup: exact-subject-of-another-report > If it's a one-off invalid bug report, please reply with: > #syz invalid > Note: if the crash happens again, it will cause creation of a new bug > report. > Note: all commands must start from beginning of the line. > > -- > You received this message because you are subscribed to the Google Groups > "syzkaller-bugs" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to syzkaller-bugs+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/syzkaller-bugs/001a11425c8667f897055cf052ff%40google.com. > For more options, visit https://groups.google.com/d/optout.
