Messages in this thread | | | Date | Wed, 4 Jul 2018 13:30:21 -0700 | From | Eric Biggers <> | Subject | Re: BUG: corrupted list in tipc_nametbl_unsubscribe |
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On Fri, Mar 09, 2018 at 12:59:04PM -0800, syzbot wrote: > Hello, > > syzbot hit the following crash on net-next commit > fd372a7a9e5e9d8011a0222d10edd3523abcd3b1 (Thu Mar 8 19:43:48 2018 +0000) > Merge tag 'mlx5-updates-2018-02-28-2' of > git://git.kernel.org/pub/scm/linux/kernel/git/mellanox/linux > > So far this crash happened 2 times on net-next. > C reproducer is attached. > syzkaller reproducer is attached. > Raw console output is attached. > compiler: gcc (GCC) 7.1.1 20170620 > .config is attached. > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > Reported-by: syzbot+f25098149f0536920141@syzkaller.appspotmail.com > It will help syzbot understand when the bug is fixed. See footer for > details. > If you forward the report, please keep this part and the footer. > > R13: ffffffffffffffff R14: 0000000000000000 R15: 0000000000000000 > Name sequence creation failed, no memory > Failed to create subscription for {1020,0,4294967295} > list_del corruption. prev->next should be 00000000f6eff561, but was > (null) > ------------[ cut here ]------------ > kernel BUG at lib/list_debug.c:53! > invalid opcode: 0000 [#1] SMP KASAN > Dumping ftrace buffer: > (ftrace buffer empty) > Modules linked in: > CPU: 0 PID: 4187 Comm: syzkaller951783 Not tainted 4.16.0-rc4+ #258 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS > Google 01/01/2011 > RIP: 0010:__list_del_entry_valid+0xef/0x150 lib/list_debug.c:51 > RSP: 0018:ffff8801b7ed6ec8 EFLAGS: 00010282 > RAX: 0000000000000054 RBX: ffffffff879ffd20 RCX: 0000000000000000 > RDX: 0000000000000054 RSI: 1ffff10036fdad8e RDI: ffffed0036fdadcd > RBP: ffff8801b7ed6ee0 R08: 1ffff10036fdad25 R09: 0000000000000000 > R10: ffff8801b7ed6da8 R11: 0000000000000000 R12: ffffffffffffffff > R13: ffff8801b7ed7080 R14: ffff8801b7f6d998 R15: ffff8801d59c6c00 > FS: 0000000000000000(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 00007f3357e55000 CR3: 0000000006e22001 CR4: 00000000001606f0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > Call Trace: > __list_del_entry include/linux/list.h:117 [inline] > list_del_init include/linux/list.h:159 [inline] > tipc_nametbl_unsubscribe+0x337/0x990 net/tipc/name_table.c:855 > tipc_sub_unsubscribe+0x6d/0x2e0 net/tipc/subscr.c:164 > tipc_conn_delete_sub+0x324/0x4a0 net/tipc/topsrv.c:245 > tipc_topsrv_kern_unsubscr+0x21d/0x350 net/tipc/topsrv.c:598 > tipc_group_delete+0x2c0/0x3d0 net/tipc/group.c:231 > tipc_sk_leave+0x10b/0x200 net/tipc/socket.c:2794 > tipc_release+0x154/0xff0 net/tipc/socket.c:577 > sock_release+0x8d/0x1e0 net/socket.c:594 > sock_close+0x16/0x20 net/socket.c:1149 > __fput+0x327/0x7e0 fs/file_table.c:209 > ____fput+0x15/0x20 fs/file_table.c:243 > task_work_run+0x199/0x270 kernel/task_work.c:113 > exit_task_work include/linux/task_work.h:22 [inline] > do_exit+0x9bb/0x1ad0 kernel/exit.c:865 > do_group_exit+0x149/0x400 kernel/exit.c:968 > SYSC_exit_group kernel/exit.c:979 [inline] > SyS_exit_group+0x1d/0x20 kernel/exit.c:977 > do_syscall_64+0x281/0x940 arch/x86/entry/common.c:287 > entry_SYSCALL_64_after_hwframe+0x42/0xb7 > RIP: 0033:0x43f0c8 > RSP: 002b:00007ffd4b6bf148 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 > RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043f0c8 > RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 > RBP: 00000000004bf1a8 R08: 00000000000000e7 R09: ffffffffffffffd0 > R10: 0000000020265000 R11: 0000000000000246 R12: 0000000000000001 > R13: 00000000006d1180 R14: 0000000000000000 R15: 0000000000000000 > Code: 4c 89 e2 48 c7 c7 c0 7c 40 86 e8 75 f6 fb fe 0f 0b 48 c7 c7 20 7d 40 > 86 e8 67 f6 fb fe 0f 0b 48 c7 c7 80 7d 40 86 e8 59 f6 fb fe <0f> 0b 48 c7 c7 > e0 7d 40 86 e8 4b f6 fb fe 0f 0b 48 89 df 48 89 > RIP: __list_del_entry_valid+0xef/0x150 lib/list_debug.c:51 RSP: > ffff8801b7ed6ec8 > ---[ end trace 1d4e489a074c9174 ]--- > > > --- > This bug is generated by a dumb bot. It may contain errors. > See https://goo.gl/tpsmEJ for details. > Direct all questions to syzkaller@googlegroups.com. > > syzbot will keep track of this bug report. > If you forgot to add the Reported-by tag, once the fix for this bug is > merged > into any tree, please reply to this email with: > #syz fix: exact-commit-title
This was fixed by commit c3317f4db831b75 (thanks Jon!):
#syz fix: tipc: fix unbalanced reference counter
- Eric
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