syzbot


WARNING in reconnect_path (2)

Status: auto-closed as invalid on 2020/03/17 01:24
Reported-by: syzbot+2e83b99bb269006f25ca@syzkaller.appspotmail.com
First crash: 952d, last: 952d
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
upstream WARNING in reconnect_path 6 1438d 1529d 0/22 auto-closed as invalid on 2019/02/22 10:34

Sample crash report:
RAX: ffffffffffffffda RBX: 00007f83ecd01c90 RCX: 000000000045a639
RDX: 0000000000000000 RSI: 0000000020000000 RDI: ffffffffffffff9c
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f83ecd026d4
R13: 00000000004c72dd R14: 00000000004dccf0 R15: 0000000000000005
WARNING: CPU: 0 PID: 5697 at fs/exportfs/expfs.c:96 clear_disconnected fs/exportfs/expfs.c:96 [inline]
WARNING: CPU: 0 PID: 5697 at fs/exportfs/expfs.c:96 reconnect_path+0x524/0x6c0 fs/exportfs/expfs.c:232
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 5697 Comm: syz-executor.0 Not tainted 4.19.84 #0
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+0x197/0x210 lib/dump_stack.c:118
 panic+0x26a/0x50e kernel/panic.c:186
 __warn.cold+0x20/0x53 kernel/panic.c:541
 report_bug+0x263/0x2b0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 fixup_bug arch/x86/kernel/traps.c:173 [inline]
 do_error_trap+0x204/0x360 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:1037
RIP: 0010:clear_disconnected fs/exportfs/expfs.c:96 [inline]
RIP: 0010:reconnect_path+0x524/0x6c0 fs/exportfs/expfs.c:232
Code: 22 43 8d ff 48 8b 5d c8 e9 24 fc ff ff e8 44 87 47 ff 48 8b 7d c8 e8 0b 43 8d ff e8 36 87 47 ff e9 21 fe ff ff e8 2c 87 47 ff <0f> 0b e9 b4 fe ff ff e8 20 87 47 ff 48 8b 55 c0 48 b8 00 00 00 00
RSP: 0018:ffff8880548afbd8 EFLAGS: 00010246
RAX: 0000000000040000 RBX: 0000000000000020 RCX: ffffc90005e6f000
RDX: 0000000000040000 RSI: ffffffff82239564 RDI: ffff88804ea390c0
RBP: ffff8880548afc28 R08: ffff8880a87bc340 R09: 0000000000000000
R10: ffffed1015d04732 R11: ffff8880ae823993 R12: ffff88804ea39080
R13: dffffc0000000000 R14: ffff88804ea39080 R15: ffff888099022220
 exportfs_decode_fh+0x4a8/0x6ee 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+0x332/0x6e0 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+0xfd/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45a639
Code: ad b6 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 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f83ecd01c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000130
RAX: ffffffffffffffda RBX: 00007f83ecd01c90 RCX: 000000000045a639
RDX: 0000000000000000 RSI: 0000000020000000 RDI: ffffffffffffff9c
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f83ecd026d4
R13: 00000000004c72dd R14: 00000000004dccf0 R15: 0000000000000005
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (1):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci2-linux-4-19 2019/11/18 01:24 linux-4.19.y c555efaf1402 d5696d51 .config log report