On Tue, Oct 9, 2018 at 7:14 PM, syzbot <syzbot+71aff6ea121ffefc280f@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > Hello, > > syzbot found the following crash on: > > HEAD commit: ae16eea39a86 Add linux-next specific files for 20181008 > git tree: linux-next > console output: https://syzkaller.appspot.com/x/log.txt?x=16a493b9400000 > kernel config: https://syzkaller.appspot.com/x/.config?x=42525ce985d1a955 > dashboard link: https://syzkaller.appspot.com/bug?extid=71aff6ea121ffefc280f > compiler: gcc (GCC) 8.0.1 20180413 (experimental) > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14567ae6400000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14baa25e400000 > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > Reported-by: syzbot+71aff6ea121ffefc280f@xxxxxxxxxxxxxxxxxxxxxxxxx This looks the same as: #syz dup: WARNING in __put_task_struct (2) The reproducer is all RDMA and also some task refcounting bug. +RDMA maintainers > ------------[ cut here ]------------ > ODEBUG: free active (active state 1) object type: rcu_head hint: > (null) > WARNING: CPU: 0 PID: 6048 at lib/debugobjects.c:329 > debug_print_object+0x16a/0x210 lib/debugobjects.c:326 > Kernel panic - not syncing: panic_on_warn set ... > > CPU: 0 PID: 6048 Comm: syz-executor022 Not tainted 4.19.0-rc7-next-20181008+ > #89 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS > Google 01/01/2011 > Call Trace: > __dump_stack lib/dump_stack.c:77 [inline] > dump_stack+0x244/0x3ab lib/dump_stack.c:113 > panic+0x238/0x4e7 kernel/panic.c:184 > __warn.cold.8+0x163/0x1ba kernel/panic.c:536 > report_bug+0x254/0x2d0 lib/bug.c:186 > fixup_bug arch/x86/kernel/traps.c:178 [inline] > do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:271 > do_invalid_op+0x36/0x40 arch/x86/kernel/traps.c:290 > invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:969 > RIP: 0010:debug_print_object+0x16a/0x210 lib/debugobjects.c:326 > Code: 41 88 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 92 00 00 00 48 8b 14 dd > 60 02 41 88 4c 89 fe 48 c7 c7 00 f8 40 88 e8 36 2f b4 fd <0f> 0b 83 05 a9 f4 > 5e 06 01 48 83 c4 18 5b 41 5c 41 5d 41 5e 41 5f > RSP: 0018:ffff8801d8c3eda8 EFLAGS: 00010086 > RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 > RDX: 0000000000000000 RSI: ffffffff8164d235 RDI: 0000000000000005 > RBP: ffff8801d8c3ede8 R08: ffff8801d70aa280 R09: ffffed003b5c3eda > R10: ffffed003b5c3eda R11: ffff8801dae1f6d7 R12: 0000000000000001 > R13: ffffffff8939a760 R14: 0000000000000000 R15: ffffffff8840fca0 > __debug_check_no_obj_freed lib/debugobjects.c:786 [inline] > debug_check_no_obj_freed+0x3ae/0x58d lib/debugobjects.c:818 > kmem_cache_free+0x202/0x290 mm/slab.c:3759 > free_task_struct kernel/fork.c:163 [inline] > free_task+0x16e/0x1f0 kernel/fork.c:457 > __put_task_struct+0x2e6/0x620 kernel/fork.c:730 > put_task_struct include/linux/sched/task.h:96 [inline] > finish_task_switch+0x66c/0x900 kernel/sched/core.c:2715 > context_switch kernel/sched/core.c:2834 [inline] > __schedule+0x8d7/0x21d0 kernel/sched/core.c:3480 > schedule+0xfe/0x460 kernel/sched/core.c:3524 > freezable_schedule include/linux/freezer.h:172 [inline] > futex_wait_queue_me+0x3f9/0x840 kernel/futex.c:2530 > futex_wait+0x45c/0xa50 kernel/futex.c:2645 > do_futex+0x31a/0x26d0 kernel/futex.c:3528 > __do_sys_futex kernel/futex.c:3589 [inline] > __se_sys_futex kernel/futex.c:3557 [inline] > __x64_sys_futex+0x472/0x6a0 kernel/futex.c:3557 > do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 > entry_SYSCALL_64_after_hwframe+0x49/0xbe > RIP: 0033:0x446549 > Code: e8 2c b3 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 > 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff > 0f 83 2b 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00 > RSP: 002b:00007f3a998f5da8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca > RAX: ffffffffffffffda RBX: 00000000006dbc38 RCX: 0000000000446549 > RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00000000006dbc38 > RBP: 00000000006dbc30 R08: 0000000000000000 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc3c > R13: 2f646e6162696e69 R14: 666e692f7665642f R15: 00000000006dbd2c > Kernel Offset: disabled > Rebooting in 86400 seconds.. > > > --- > 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#bug-status-tracking for how to communicate with > syzbot. > 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/00000000000053a2ca0577ceddac%40google.com. > For more options, visit https://groups.google.com/d/optout.
