Re: [syzbot] kernel BUG at fs/reiserfs/journal.c:LINE!

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syzbot

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May 9, 2021, 6:20:12 PMMay 9
to alaaemadh...@gmail.com, syzkall...@googlegroups.com
Hello,

syzbot has tested the proposed patch but the reproducer is still triggering an issue:
kernel BUG in do_journal_end

kernel BUG at fs/reiserfs/journal.c:3628!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 10158 Comm: syz-executor.1 Not tainted 5.13.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:check_journal_end fs/reiserfs/journal.c:3628 [inline]
RIP: 0010:do_journal_end+0x3709/0x4950 fs/reiserfs/journal.c:4024
Code: 8d 08 ff ff e9 51 f9 ff ff e8 63 7f 71 ff 0f 0b e8 5c 7f 71 ff 0f 0b e8 55 7f 71 ff 0f 0b e8 4e 7f 71 ff 0f 0b e8 47 7f 71 ff <0f> 0b e8 40 7f 71 ff 0f 0b e8 39 7f 71 ff 48 8b 44 24 08 48 8b 54
RSP: 0018:ffffc9000b7579f8 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffffc9000bc51000 RCX: 0000000000000000
RDX: ffff888035a34300 RSI: ffffffff82028669 RDI: 0000000000000003
RBP: ffff8880315dc000 R08: 0000000000000000 R09: ffffc9000bc5105b
R10: ffffffff82025583 R11: 0000000000000000 R12: 0000000000000000
R13: ffffc9000bc51058 R14: ffffc9000b757c30 R15: 0000000000000000
FS: 00007fac0155c700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffdf4503d37 CR3: 0000000040d48000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
journal_end+0x277/0x320 fs/reiserfs/journal.c:3398
reiserfs_fill_super+0x20fa/0x2e00 fs/reiserfs/super.c:2168
mount_bdev+0x34d/0x410 fs/super.c:1368
legacy_get_tree+0x105/0x220 fs/fs_context.c:592
vfs_get_tree+0x89/0x2f0 fs/super.c:1498
do_new_mount fs/namespace.c:2905 [inline]
path_mount+0x132a/0x1fa0 fs/namespace.c:3235
do_mount fs/namespace.c:3248 [inline]
__do_sys_mount fs/namespace.c:3456 [inline]
__se_sys_mount fs/namespace.c:3433 [inline]
__x64_sys_mount+0x27f/0x300 fs/namespace.c:3433
do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x467b1a
Code: 48 c7 c2 bc ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fac0155bfa8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 0000000000467b1a
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007fac0155c000
RBP: 00007fac0155c040 R08: 00007fac0155c040 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000020000000
R13: 0000000020000100 R14: 00007fac0155c000 R15: 0000000020011500
Modules linked in:
---[ end trace afb80ae464bc5d57 ]---
RIP: 0010:check_journal_end fs/reiserfs/journal.c:3628 [inline]
RIP: 0010:do_journal_end+0x3709/0x4950 fs/reiserfs/journal.c:4024
Code: 8d 08 ff ff e9 51 f9 ff ff e8 63 7f 71 ff 0f 0b e8 5c 7f 71 ff 0f 0b e8 55 7f 71 ff 0f 0b e8 4e 7f 71 ff 0f 0b e8 47 7f 71 ff <0f> 0b e8 40 7f 71 ff 0f 0b e8 39 7f 71 ff 48 8b 44 24 08 48 8b 54
RSP: 0018:ffffc9000b7579f8 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffffc9000bc51000 RCX: 0000000000000000
RDX: ffff888035a34300 RSI: ffffffff82028669 RDI: 0000000000000003
RBP: ffff8880315dc000 R08: 0000000000000000 R09: ffffc9000bc5105b
R10: ffffffff82025583 R11: 0000000000000000 R12: 0000000000000000
R13: ffffc9000bc51058 R14: ffffc9000b757c30 R15: 0000000000000000
FS: 00007fac0155c700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f676e85bf60 CR3: 0000000040d48000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400


Tested on:

commit: 6efb943b Linux 5.13-rc1
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=12238223d00000
kernel config: https://syzkaller.appspot.com/x/.config?x=d1d689750e82a1f
dashboard link: https://syzkaller.appspot.com/bug?extid=6820505ae5978f4f8f2f
compiler:

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