syzbot


kernel BUG in __ext4_journal_stop

Status: upstream: reported C repro on 2022/11/28 10:23
Labels: ext4 (incorrect?)
Reported-by: syzbot+bdab24d5bf96d57c50b0@syzkaller.appspotmail.com
First crash: 184d, last: 5h42m

Cause bisection: failed (error log, bisect log)
Discussions (2)
Title Replies (including bot) Last reply
[syzbot] Monthly ext4 report (May 2023) 1 (2) 2023/06/01 02:08
[syzbot] kernel BUG in __ext4_journal_stop 0 (1) 2022/11/28 10:23
Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 kernel BUG in __ext4_journal_stop origin:lts-only syz 1 11d 66d 0/3 upstream: reported syz repro on 2023/03/26 14:44
android-5-15 kernel BUG in __ext4_journal_stop ext4 origin:upstream C error 6 19d 185d 0/2 upstream: reported C repro on 2022/11/27 03:57
Last patch testing requests (1)
Created Duration User Patch Repo Result
2023/04/06 10:40 31m tudor.ambarus@linaro.org git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git dev report log
Fix bisection attempts (2)
Created Duration User Patch Repo Result
2023/05/21 21:31 38m bisect fix upstream job log (0) log
2023/02/06 16:16 40m bisect fix upstream job log (0) log

Sample crash report:
------------[ cut here ]------------
kernel BUG at fs/ext4/ext4_jbd2.c:53!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 5008 Comm: syz-executor400 Not tainted 6.4.0-rc4-syzkaller-00051-g48b1320a674e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
RIP: 0010:ext4_put_nojournal fs/ext4/ext4_jbd2.c:53 [inline]
RIP: 0010:__ext4_journal_stop+0x1b7/0x1f0 fs/ext4/ext4_jbd2.c:122
Code: bf c9 1a 00 31 ff 89 de 41 89 c4 e8 13 59 5e ff 85 db 44 0f 45 e3 e9 5e ff ff ff e8 d3 25 b1 ff e9 ae fe ff ff e8 d9 5c 5e ff <0f> 0b 4c 89 e7 e8 df 25 b1 ff e9 e5 fe ff ff 48 89 ef e8 d2 25 b1
RSP: 0018:ffffc90003c4f3f8 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000036 RCX: 0000000000000000
RDX: ffff888026f69dc0 RSI: ffffffff8225e747 RDI: 0000000000000007
RBP: 0000000000000000 R08: 0000000000000007 R09: 0000000000000fff
R10: 0000000000000000 R11: ffffffff81d6ec1f R12: ffff888077f0a100
R13: ffffffff8a62f0e0 R14: 000000000000032a R15: 0000000000000005
FS:  00007fa6d5f62700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa6cdc41000 CR3: 0000000029d85000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 ext4_write_inline_data_end+0x4cf/0xd20 fs/ext4/inline.c:810
 ext4_da_write_end+0x3d0/0xad0 fs/ext4/inode.c:2985
 generic_perform_write+0x316/0x570 mm/filemap.c:3934
 ext4_buffered_write_iter+0x15b/0x460 fs/ext4/file.c:289
 ext4_file_write_iter+0xbe0/0x1740 fs/ext4/file.c:710
 call_write_iter include/linux/fs.h:1868 [inline]
 do_iter_readv_writev+0x20b/0x3b0 fs/read_write.c:735
 do_iter_write+0x185/0x7e0 fs/read_write.c:860
 vfs_iter_write+0x74/0xa0 fs/read_write.c:901
 iter_file_splice_write+0x743/0xc80 fs/splice.c:795
 do_splice_from fs/splice.c:873 [inline]
 direct_splice_actor+0x114/0x180 fs/splice.c:1039
 splice_direct_to_actor+0x335/0x8a0 fs/splice.c:994
 do_splice_direct+0x1ab/0x280 fs/splice.c:1082
 do_sendfile+0xb19/0x12c0 fs/read_write.c:1254
 __do_sys_sendfile64 fs/read_write.c:1322 [inline]
 __se_sys_sendfile64 fs/read_write.c:1308 [inline]
 __x64_sys_sendfile64+0x1d0/0x210 fs/read_write.c:1308
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fa6d5fbdc69
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 31 18 00 00 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa6d5f622f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007fa6d603a6c0 RCX: 00007fa6d5fbdc69
RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000004
RBP: 00007fa6d6007a4c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000080000041 R11: 0000000000000246 R12: 00007fa6d60072e0
R13: 0000000020000fc0 R14: 0030656c69662f2e R15: 00007fa6d603a6c8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_put_nojournal fs/ext4/ext4_jbd2.c:53 [inline]
RIP: 0010:__ext4_journal_stop+0x1b7/0x1f0 fs/ext4/ext4_jbd2.c:122
Code: bf c9 1a 00 31 ff 89 de 41 89 c4 e8 13 59 5e ff 85 db 44 0f 45 e3 e9 5e ff ff ff e8 d3 25 b1 ff e9 ae fe ff ff e8 d9 5c 5e ff <0f> 0b 4c 89 e7 e8 df 25 b1 ff e9 e5 fe ff ff 48 89 ef e8 d2 25 b1
RSP: 0018:ffffc90003c4f3f8 EFLAGS: 00010293

RAX: 0000000000000000 RBX: 0000000000000036 RCX: 0000000000000000
RDX: ffff888026f69dc0 RSI: ffffffff8225e747 RDI: 0000000000000007
RBP: 0000000000000000 R08: 0000000000000007 R09: 0000000000000fff
R10: 0000000000000000 R11: ffffffff81d6ec1f R12: ffff888077f0a100
R13: ffffffff8a62f0e0 R14: 000000000000032a R15: 0000000000000005
FS:  00007fa6d5f62700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000080 CR3: 0000000029d85000 CR4: 0000000000350ef0

Crashes (10):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets Manager Title
2023/05/31 20:35 upstream 48b1320a674e e2a77acd .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kasan-gce-root kernel BUG in __ext4_journal_stop
2023/05/31 10:49 upstream afead42fdfca 09898419 .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kasan-gce-root kernel BUG in __ext4_journal_stop
2023/03/13 11:04 upstream eeac8ede1755 5205ef30 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-upstream-fs kernel BUG in __ext4_journal_stop
2022/11/28 10:04 upstream cf562a45a0d5 f4470a7b .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-upstream-fs kernel BUG in __ext4_journal_stop
2023/03/25 12:45 upstream 65aca32efdcb fbf0499a .config console log report syz [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kasan-gce-smack-root kernel BUG in __ext4_journal_stop
2023/02/26 18:46 upstream 2fcd07b7ccd5 ee50e71c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in __ext4_journal_stop
2023/01/07 16:16 upstream 0a71553536d2 1dac8c7a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in __ext4_journal_stop
2022/12/05 08:54 upstream 0ba09b173387 e080de16 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in __ext4_journal_stop
2022/11/30 10:22 upstream 01f856ae6d0c 579a3740 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in __ext4_journal_stop
2023/04/21 10:52 linux-next 44bf136283e5 2b32bd34 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root kernel BUG in __ext4_journal_stop
* Struck through repros no longer work on HEAD.