syzbot


WARNING in reconnect_path

Status: auto-closed as invalid on 2019/02/22 10:34
Reported-by: syzbot+3d2f4fb8f8cb02694334@syzkaller.appspotmail.com
First crash: 1548d, last: 1438d
similar bugs (3):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 WARNING in reconnect_path 1 1102d 1102d 0/1 auto-closed as invalid on 2019/10/25 08:44
linux-4.14 WARNING in reconnect_path C done done 1 893d 953d 1/1 fixed on 2020/02/16 09:59
linux-4.19 WARNING in reconnect_path (2) 1 952d 952d 0/1 auto-closed as invalid on 2020/03/17 01:24

Sample crash report:
WARNING: CPU: 1 PID: 18520 at fs/exportfs/expfs.c:96 clear_disconnected fs/exportfs/expfs.c:96 [inline]
WARNING: CPU: 1 PID: 18520 at fs/exportfs/expfs.c:96 reconnect_path+0x515/0x6f0 fs/exportfs/expfs.c:232
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 18520 Comm: syz-executor5 Not tainted 4.18.0-rc3+ #128
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+0x1c9/0x2b4 lib/dump_stack.c:113
 panic+0x238/0x4e7 kernel/panic.c:184
 __warn.cold.8+0x163/0x1ba kernel/panic.c:536
 report_bug+0x252/0x2d0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 do_error_trap+0x1fc/0x4d0 arch/x86/kernel/traps.c:296
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:992
RIP: 0010:clear_disconnected fs/exportfs/expfs.c:96 [inline]
RIP: 0010:reconnect_path+0x515/0x6f0 fs/exportfs/expfs.c:232
Code: 20 89 de e8 3d 98 30 ff 85 db 0f 85 59 ff ff ff e8 20 97 30 ff 4c 89 ef 45 31 ed e8 85 70 7f ff e9 b1 fe ff ff e8 0b 97 30 ff <0f> 0b e9 6a ff ff ff e8 ff 96 30 ff 48 89 df e8 67 70 7f ff 4c 89 
RSP: 0018:ffff8801ce66faf0 EFLAGS: 00010246
RAX: 0000000000040000 RBX: 0000000000000020 RCX: ffffc90006a3a000
RDX: 0000000000040000 RSI: ffffffff824b74c5 RDI: ffff8801797c74a0
RBP: ffff8801ce66fb40 R08: ffff8801b4db8640 R09: ffffed003b5e46d6
R10: 0000000000000003 R11: 0000000000000000 R12: ffff8801797c7460
R13: ffff8801797c7460 R14: dffffc0000000000 R15: ffff88019075bc20
 exportfs_decode_fh+0x3cd/0x6d0 fs/exportfs/expfs.c:457
 do_handle_to_path fs/fhandle.c:152 [inline]
 handle_to_path fs/fhandle.c:207 [inline]
 do_handle_open+0x407/0x960 fs/fhandle.c:223
 __do_sys_open_by_handle_at fs/fhandle.c:265 [inline]
 __se_sys_open_by_handle_at fs/fhandle.c:256 [inline]
 __x64_sys_open_by_handle_at+0x76/0xb0 fs/fhandle.c:256
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x455ab9
Code: 1d ba fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 eb b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00 
RSP: 002b:00007f4030830c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000130
RAX: ffffffffffffffda RBX: 00007f40308316d4 RCX: 0000000000455ab9
RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000013
RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000014
R13: 00000000004c030d R14: 00000000004cfbb8 R15: 000000000000001e
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (6):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-root 2018/07/03 06:31 upstream d0fbad0aec1d 317fc8ea .config log report
ci-upstream-kasan-gce-root 2018/05/04 05:59 upstream c15f6d8d4715 9ce14f4b .config log report
ci-upstream-kasan-gce-root 2018/04/17 04:52 upstream a27fc14219f2 b80fd3b5 .config log report
ci-upstream-kasan-gce-root 2018/04/12 04:15 upstream b284d4d5a678 9cd56d71 .config log report
ci-upstream-kasan-gce-root 2018/03/31 16:38 upstream b5dbc28762fd 8fbce0e4 .config log report
ci-upstream-linux-next-kasan-gce-root 2018/07/20 01:06 linux-next 1c34981993da 49f35839 .config log report