On Sat, May 25, 2019 at 7:38 PM syzbot <syzbot+3d04999521633dceb439@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > > Hello, > > syzbot found the following crash on: > > HEAD commit: af5136f9 selftests/net: SO_TXTIME with ETF and FQ > git tree: net-next > console output: https://syzkaller.appspot.com/x/log.txt?x=13164ee4a00000 > kernel config: https://syzkaller.appspot.com/x/.config?x=fc045131472947d7 > dashboard link: https://syzkaller.appspot.com/bug?extid=3d04999521633dceb439 > compiler: gcc (GCC) 9.0.0 20181231 (experimental) > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1661b6e4a00000 Looking at the reproducer, it may be bpf-related. +bpf mailing list. > Bisection is inconclusive: the first bad commit could be any of: > > 7c00e8ae Merge tag 'armsoc-soc' of > git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc > a2b7ab45 Merge tag 'linux-watchdog-4.18-rc1' of > git://www.linux-watchdog.org/linux-watchdog > 721afaa2 Merge tag 'armsoc-dt' of > git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1062daaaa00000 > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > Reported-by: syzbot+3d04999521633dceb439@xxxxxxxxxxxxxxxxxxxxxxxxx > > ================================================================== > BUG: KASAN: slab-out-of-bounds in class_equal+0x40/0x50 > kernel/locking/lockdep.c:1527 > Read of size 8 at addr ffff8880813cdab0 by task syz-executor.0/9147 > > CPU: 0 PID: 9147 Comm: syz-executor.0 Not tainted 5.2.0-rc1+ #6 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS > Google 01/01/2011 > Call Trace: > > Allocated by task 2266519551: > ------------[ cut here ]------------ > kernel BUG at mm/slab.c:4178! > invalid opcode: 0000 [#1] PREEMPT SMP KASAN > CPU: 0 PID: 9147 Comm: syz-executor.0 Not tainted 5.2.0-rc1+ #6 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS > Google 01/01/2011 > RIP: 0010:__check_heap_object+0xa5/0xb3 mm/slab.c:4178 > Code: 2b 48 c7 c7 4d fc 61 88 e8 28 ad 07 00 5d c3 41 8b 91 04 01 00 00 48 > 29 c7 48 39 d7 77 bd 48 01 d0 48 29 c8 4c 39 c0 72 b2 c3 <0f> 0b 48 c7 c7 > 4d fc 61 88 e8 3c b2 07 00 44 89 e1 48 c7 c7 08 fd > RSP: 0018:ffff8880813cd370 EFLAGS: 00010046 > RAX: 0000000000000001 RBX: 0000000000000001 RCX: 000000000000000c > RDX: ffff8880813cc340 RSI: 0000000000000000 RDI: ffff8880813cd468 > RBP: ffff8880813cd3c0 R08: 0000000000000001 R09: ffff8880aa594c40 > R10: 0000000000000f23 R11: 0000000000000000 R12: ffff8880813cd468 > R13: ffffea000204f300 R14: ffff8880813cd469 R15: 0000000000000001 > FS: 00005555564e1940(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: ffffffff8c046bd8 CR3: 000000009a952000 CR4: 00000000001406f0 > Call Trace: > Modules linked in: > ---[ end trace e78aeeb619bc791b ]--- > RIP: 0010:__check_heap_object+0xa5/0xb3 mm/slab.c:4178 > Code: 2b 48 c7 c7 4d fc 61 88 e8 28 ad 07 00 5d c3 41 8b 91 04 01 00 00 48 > 29 c7 48 39 d7 77 bd 48 01 d0 48 29 c8 4c 39 c0 72 b2 c3 <0f> 0b 48 c7 c7 > 4d fc 61 88 e8 3c b2 07 00 44 89 e1 48 c7 c7 08 fd > RSP: 0018:ffff8880813cd370 EFLAGS: 00010046 > RAX: 0000000000000001 RBX: 0000000000000001 RCX: 000000000000000c > RDX: ffff8880813cc340 RSI: 0000000000000000 RDI: ffff8880813cd468 > RBP: ffff8880813cd3c0 R08: 0000000000000001 R09: ffff8880aa594c40 > R10: 0000000000000f23 R11: 0000000000000000 R12: ffff8880813cd468 > R13: ffffea000204f300 R14: ffff8880813cd469 R15: 0000000000000001 > FS: 00005555564e1940(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: ffffffff8c046bd8 CR3: 000000009a952000 CR4: 00000000001406f0 > > > --- > This bug 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 syzkaller@xxxxxxxxxxxxxxxx. > > syzbot will keep track of this bug report. See: > https://goo.gl/tpsmEJ#status for how to communicate with syzbot. > For information about bisection process see: https://goo.gl/tpsmEJ#bisection > syzbot can test patches for this bug, for details see: > https://goo.gl/tpsmEJ#testing-patches > > -- > 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+unsubscribe@xxxxxxxxxxxxxxxx. > To view this discussion on the web visit https://groups.google.com/d/msgid/syzkaller-bugs/00000000000016cb560589b9c7c4%40google.com. > For more options, visit https://groups.google.com/d/optout.
