syzbot


kernel BUG in ext4_mb_use_inode_pa (2)

Status: upstream: reported C repro on 2024/08/08 04:33
Subsystems: ext4
[Documentation on labels]
Reported-by: syzbot+d79019213609e7056a19@syzkaller.appspotmail.com
First crash: 437d, last: 2d05h
Cause bisection: failed (error log, bisect log)
  
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [ext4?] kernel BUG in ext4_mb_use_inode_pa (2) 0 (2) 2024/09/06 04:42
Similar bugs (1)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream kernel BUG in ext4_mb_use_inode_pa ext4 -1 C error done 2 1107d 1107d 22/29 fixed on 2023/02/24 13:50
Last patch testing requests (2)
Created Duration User Patch Repo Result
2025/03/11 17:03 31m retest repro git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci report log
2025/02/04 01:53 15m retest repro upstream report log

Sample crash report:
EXT4-fs error (device loop0): ext4_mb_mark_diskspace_used:4113: comm syz-executor314: Allocating blocks 1-17 which overlap fs metadata
------------[ cut here ]------------
kernel BUG at fs/ext4/mballoc.c:4685!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5318 Comm: syz-executor314 Not tainted 6.15.0-syzkaller-12141-gec7714e49479 #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:ext4_mb_use_inode_pa+0x6c1/0x720 fs/ext4/mballoc.c:4685
Code: e8 d4 57 ab ff 48 ba 00 00 00 00 00 fc ff df e9 da fa ff ff e8 30 e6 47 ff 90 0f 0b e8 28 e6 47 ff 90 0f 0b e8 20 e6 47 ff 90 <0f> 0b e8 18 e6 47 ff 90 0f 0b 48 8b 0c 24 80 e1 07 80 c1 03 38 c1
RSP: 0018:ffffc9000d3cf3c8 EFLAGS: 00010293
RAX: ffffffff827875b0 RBX: 00000000ffffffff RCX: ffff888035674880
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000001
RBP: 1ffff11008d2a23d R08: ffff8880468298a3 R09: 1ffff11008d05314
R10: dffffc0000000000 R11: ffffed1008d05315 R12: 0000000000000004
R13: 0000000000000002 R14: 1ffff11008d05317 R15: ffff8880468298b8
FS:  00007efeefd106c0(0000) GS:ffff88808d255000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007efeefd10d58 CR3: 0000000044136000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ext4_mb_use_preallocated+0x660/0x13f0 fs/ext4/mballoc.c:4902
 ext4_mb_new_blocks+0x5b4/0x46a0 fs/ext4/mballoc.c:6206
 ext4_ext_map_blocks+0x161a/0x6ac0 fs/ext4/extents.c:4383
 ext4_map_create_blocks fs/ext4/inode.c:609 [inline]
 ext4_map_blocks+0x931/0x18d0 fs/ext4/inode.c:813
 ext4_alloc_file_blocks+0x3b8/0xc60 fs/ext4/extents.c:4538
 ext4_zero_range+0x39b/0xb90 fs/ext4/extents.c:4618
 ext4_fallocate+0x74c/0xcd0 fs/ext4/extents.c:4790
 vfs_fallocate+0x6a0/0x830 fs/open.c:341
 ksys_fallocate fs/open.c:365 [inline]
 __do_sys_fallocate fs/open.c:370 [inline]
 __se_sys_fallocate fs/open.c:368 [inline]
 __x64_sys_fallocate+0xc0/0x110 fs/open.c:368
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7efeefd7c649
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 81 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007efeefd10218 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007efeefe03618 RCX: 00007efeefd7c649
RDX: 0000000000000fff RSI: 0000000000000011 RDI: 0000000000000004
RBP: 00007efeefe03610 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000008800000 R11: 0000000000000246 R12: 00007efeefdd0614
R13: 6273752f7665642f R14: 0000200000000080 R15: 00002000000002c0
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_mb_use_inode_pa+0x6c1/0x720 fs/ext4/mballoc.c:4685
Code: e8 d4 57 ab ff 48 ba 00 00 00 00 00 fc ff df e9 da fa ff ff e8 30 e6 47 ff 90 0f 0b e8 28 e6 47 ff 90 0f 0b e8 20 e6 47 ff 90 <0f> 0b e8 18 e6 47 ff 90 0f 0b 48 8b 0c 24 80 e1 07 80 c1 03 38 c1
RSP: 0018:ffffc9000d3cf3c8 EFLAGS: 00010293
RAX: ffffffff827875b0 RBX: 00000000ffffffff RCX: ffff888035674880
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000001
RBP: 1ffff11008d2a23d R08: ffff8880468298a3 R09: 1ffff11008d05314
R10: dffffc0000000000 R11: ffffed1008d05315 R12: 0000000000000004
R13: 0000000000000002 R14: 1ffff11008d05317 R15: ffff8880468298b8
FS:  00007efeefd106c0(0000) GS:ffff88808d255000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007efeefd10d58 CR3: 0000000044136000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (160):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/06/05 21:26 upstream ec7714e49479 6b6b5f21 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci-snapshot-upstream-root kernel BUG in ext4_mb_use_inode_pa
2024/09/06 04:41 upstream ad618736883b 464ac2ed .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro] ci-snapshot-upstream-root kernel BUG in ext4_mb_use_inode_pa
2025/10/03 01:55 linux-next 7396732143a2 49379ee0 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci-upstream-linux-next-kasan-gce-root kernel BUG in ext4_mb_use_inode_pa
2025/02/23 10:17 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci a1c24ab82279 d34966d1 .config console log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci-upstream-gce-arm64 kernel BUG in ext4_mb_use_inode_pa
2024/08/04 04:29 upstream defaf1a2113a 1786a2a8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root kernel BUG in ext4_mb_use_inode_pa
2025/10/13 14:52 upstream 3a8660878839 b6605ba8 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ext4_mb_use_inode_pa
2025/10/12 16:12 upstream 67029a49db6c ff1712fe .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ext4_mb_use_inode_pa
2025/10/10 16:36 upstream 5472d60c129f ff1712fe .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ext4_mb_use_inode_pa
2025/10/07 14:42 upstream c746c3b51698 8ef35d49 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ext4_mb_use_inode_pa
2025/10/07 00:10 upstream ba9dac987319 8ef35d49 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ext4_mb_use_inode_pa
2025/10/05 17:38 upstream 6093a688a07d 49379ee0 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ext4_mb_use_inode_pa
2025/10/05 11:46 upstream 6093a688a07d 49379ee0 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ext4_mb_use_inode_pa
2025/10/04 07:09 upstream 2ccb4d203fe4 49379ee0 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ext4_mb_use_inode_pa
2025/10/02 21:02 upstream 7f7072574127 49379ee0 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ext4_mb_use_inode_pa
2025/09/29 12:54 upstream e5f0a698b34e 86341da6 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ext4_mb_use_inode_pa
2025/09/29 11:32 upstream e5f0a698b34e 86341da6 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ext4_mb_use_inode_pa
2025/09/28 03:17 upstream 51a24b7deaae 001c9061 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ext4_mb_use_inode_pa
2025/09/27 17:34 upstream fec734e8d564 001c9061 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ext4_mb_use_inode_pa
2025/09/27 09:51 upstream 083fc6d7fa0d 001c9061 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ext4_mb_use_inode_pa
2025/09/26 03:39 upstream 4ff71af020ae 0abd0691 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ext4_mb_use_inode_pa
2025/09/25 06:26 upstream 4ea5af085908 0abd0691 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ext4_mb_use_inode_pa
2025/09/24 22:44 upstream 4ea5af085908 0abd0691 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ext4_mb_use_inode_pa
2025/09/22 19:55 upstream 07e27ad16399 770ff59f .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ext4_mb_use_inode_pa
2025/09/18 17:09 upstream 8b789f2b7602 e2beed91 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ext4_mb_use_inode_pa
2025/09/13 08:28 upstream 22f20375f5b7 e2beed91 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ext4_mb_use_inode_pa
2025/09/12 02:54 upstream 02ffd6f89c50 e2beed91 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ext4_mb_use_inode_pa
2025/09/11 07:32 upstream 7aac71907bde fdeaa69b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ext4_mb_use_inode_pa
2025/09/07 13:10 upstream b236920731dd d291dd2d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ext4_mb_use_inode_pa
2025/09/07 04:44 upstream b236920731dd d291dd2d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ext4_mb_use_inode_pa
2025/09/06 19:17 upstream d1d10cea0895 d291dd2d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ext4_mb_use_inode_pa
2025/08/28 16:03 upstream 07d9df80082b bee60a83 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ext4_mb_use_inode_pa
2025/08/21 21:47 upstream 32b7144f806e 3e79b825 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ext4_mb_use_inode_pa
2025/08/20 19:58 upstream b19a97d57c15 bd178e57 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ext4_mb_use_inode_pa
2025/08/20 15:10 upstream b19a97d57c15 bd178e57 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ext4_mb_use_inode_pa
2025/08/18 06:28 upstream 8d561baae505 dcc075fb .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ext4_mb_use_inode_pa
2025/08/16 21:53 upstream 90d970cade8e dcc075fb .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ext4_mb_use_inode_pa
2025/08/13 10:44 upstream 8742b2d8935f 22ec1469 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ext4_mb_use_inode_pa
2025/08/12 00:49 upstream 8f5ae30d69d7 c06e8995 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ext4_mb_use_inode_pa
2025/08/11 17:02 upstream 8f5ae30d69d7 32a0e5ed .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ext4_mb_use_inode_pa
2025/08/10 23:38 upstream 2b38afce25c4 32a0e5ed .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ext4_mb_use_inode_pa
2025/08/09 09:39 upstream 37816488247d 32a0e5ed .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ext4_mb_use_inode_pa
2025/08/03 06:13 upstream eacf91b0c78a 7368264b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ext4_mb_use_inode_pa
2025/07/31 16:35 upstream 260f6f4fda93 3526e777 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ext4_mb_use_inode_pa
2025/07/31 00:00 upstream 4b290aae788e f8f2b4da .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ext4_mb_use_inode_pa
2025/07/22 19:45 upstream 89be9a83ccf1 af30dea9 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ext4_mb_use_inode_pa
2025/07/22 17:54 upstream 89be9a83ccf1 af30dea9 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ext4_mb_use_inode_pa
2025/07/22 07:32 upstream 89be9a83ccf1 1555463b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ext4_mb_use_inode_pa
2025/07/21 13:48 upstream 89be9a83ccf1 56d87229 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ext4_mb_use_inode_pa
2025/07/14 04:28 upstream 5d5d62298b8b 3cda49cf .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ext4_mb_use_inode_pa
2025/07/12 01:48 upstream 40f92e79b0aa 3cda49cf .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ext4_mb_use_inode_pa
2025/07/11 16:03 upstream bc9ff192a6c9 3cda49cf .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ext4_mb_use_inode_pa
2025/07/11 13:54 upstream bc9ff192a6c9 3cda49cf .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ext4_mb_use_inode_pa
2025/07/11 04:23 upstream bc9ff192a6c9 3cda49cf .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ext4_mb_use_inode_pa
2025/07/10 12:32 upstream 8c2e52ebbe88 d7384b6d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ext4_mb_use_inode_pa
2025/07/10 05:00 upstream 8c2e52ebbe88 956bd956 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ext4_mb_use_inode_pa
* Struck through repros no longer work on HEAD.