syzbot


WARNING: locking bug in ext4_xattr_inode_iget

Status: fixed on 2023/07/01 16:05
Subsystems: ext4
[Documentation on labels]
Reported-by: syzbot+e44749b6ba4d0434cd47@syzkaller.appspotmail.com
Fix commit: 2bc7e7c1a3bc ext4: disallow ea_inodes with extended attributes
First crash: 389d, last: 354d
Cause bisection: failed (error log, bisect log)
  
Discussions (3)
Title Replies (including bot) Last reply
Re: [Syzkaller & bisect] There is "soft lockup in __cleanup_mnt" in v6.4-rc3 kernel 2 (2) 2023/05/26 06:43
[PATCH 0/4] ext4: clean up ea_inode handling 5 (5) 2023/05/24 03:49
[syzbot] [ext4?] WARNING: locking bug in ext4_xattr_inode_iget 0 (1) 2023/05/08 23:06
Similar bugs (3)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 WARNING: locking bug in ext4_xattr_inode_iget origin:upstream missing-backport C inconclusive 7 152d 388d 0/3 upstream: reported C repro on 2023/05/06 10:34
upstream WARNING: locking bug in ext4_xattr_inode_iget (2) ext4 C 1 61d 57d 0/26 upstream: reported C repro on 2024/03/31 14:03
linux-5.15 WARNING: locking bug in ext4_xattr_inode_iget C error 4 356d 385d 0/3 auto-obsoleted due to no activity on 2023/09/14 16:49
Last patch testing requests (3)
Created Duration User Patch Repo Result
2023/05/23 16:21 30m tytso@mit.edu git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git test OK log
2023/05/23 03:44 23m tytso@mit.edu git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git test report log
2023/05/22 21:13 23m tytso@mit.edu git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git test report log

Sample crash report:
EXT4-fs error (device loop0): ext4_xattr_inode_iget:436: inode #12: comm syz-executor308: casefold flag without casefold feature
------------[ cut here ]------------
Looking for class "&ea_inode->i_rwsem" with key ext4_fs_type, but found a different class "&type->i_mutex_dir_key" with the same key
WARNING: CPU: 1 PID: 4993 at kernel/locking/lockdep.c:941 look_up_lock_class+0xc2/0x140 kernel/locking/lockdep.c:938
Modules linked in:
CPU: 1 PID: 4993 Comm: syz-executor308 Not tainted 6.3.0-syzkaller-13027-g1a5304fecee5 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
RIP: 0010:look_up_lock_class+0xc2/0x140 kernel/locking/lockdep.c:938
Code: 8b 16 48 c7 c0 60 91 1e 90 48 39 c2 74 46 f6 05 92 87 92 03 01 75 3d c6 05 89 87 92 03 01 48 c7 c7 40 af ea 8a e8 ee 29 a4 f6 <0f> 0b eb 26 e8 15 2f 81 f9 48 c7 c7 80 ae ea 8a 89 de e8 37 ca fd
RSP: 0018:ffffc90003b7f090 EFLAGS: 00010046
RAX: adf3f2136120b500 RBX: ffffffff9005c4e0 RCX: ffff88802d63d940
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90003b7f190 R08: ffffffff81531182 R09: ffffed1017325163
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000001
R13: 1ffff9200076fe20 R14: ffff888078b36800 R15: ffffffff8d0df979
FS:  0000555555f12300(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000005fdeb8 CR3: 000000002c0ce000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 register_lock_class+0x104/0x990 kernel/locking/lockdep.c:1290
 lockdep_init_map_type+0x37a/0x8e0 kernel/locking/lockdep.c:4875
 ext4_xattr_inode_set_class fs/ext4/xattr.c:124 [inline]
 ext4_xattr_inode_iget+0x2fa/0x5e0 fs/ext4/xattr.c:461
 ext4_xattr_inode_get+0x164/0x430 fs/ext4/xattr.c:551
 ext4_xattr_move_to_block fs/ext4/xattr.c:2640 [inline]
 ext4_xattr_make_inode_space fs/ext4/xattr.c:2742 [inline]
 ext4_expand_extra_isize_ea+0xf28/0x1d10 fs/ext4/xattr.c:2834
 __ext4_expand_extra_isize+0x2f7/0x3d0 fs/ext4/inode.c:5769
 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5812 [inline]
 __ext4_mark_inode_dirty+0x53e/0x870 fs/ext4/inode.c:5890
 ext4_evict_inode+0x839/0xf20 fs/ext4/inode.c:251
 evict+0x2a4/0x620 fs/inode.c:665
 ext4_orphan_cleanup+0xb1e/0x13c0 fs/ext4/orphan.c:474
 __ext4_fill_super fs/ext4/super.c:5556 [inline]
 ext4_fill_super+0x62f7/0x6bd0 fs/ext4/super.c:5672
 get_tree_bdev+0x405/0x620 fs/super.c:1303
 vfs_get_tree+0x8c/0x270 fs/super.c:1510
 do_new_mount+0x28f/0xae0 fs/namespace.c:3039
 do_mount fs/namespace.c:3382 [inline]
 __do_sys_mount fs/namespace.c:3591 [inline]
 __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3568
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f63b52faf0a
Code: 83 c4 08 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff577b2cd8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f63b52faf0a
RDX: 0000000020000180 RSI: 00000000200000c0 RDI: 00007fff577b2cf0
RBP: 00007fff577b2cf0 R08: 00007fff577b2d30 R09: 0000000000000435
R10: 0000000000800700 R11: 0000000000000206 R12: 0000000000000004
R13: 0000555555f122c0 R14: 0000000000800700 R15: 00007fff577b2d30
 </TASK>

Crashes (23):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/05/04 23:24 upstream 1a5304fecee5 518a39a6 .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-upstream-fs WARNING: locking bug in ext4_xattr_inode_iget
2023/06/06 17:18 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci eb0f1697d729 a4ae4f42 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-gce-arm64 WARNING: locking bug in ext4_xattr_inode_iget
2023/05/04 23:09 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a 3a560463 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-gce-arm64 WARNING: locking bug in ext4_xattr_inode_iget
2023/06/06 07:06 linux-next 715abedee4cd a4ae4f42 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING: locking bug in ext4_xattr_inode_iget
2023/06/08 23:16 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 908f31f2a05b 7086cdb9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING: locking bug in ext4_xattr_inode_iget
2023/06/08 18:41 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 3bb1a3e1674b 7086cdb9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING: locking bug in ext4_xattr_inode_iget
2023/06/08 12:04 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 3bb1a3e1674b 7086cdb9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING: locking bug in ext4_xattr_inode_iget
2023/06/08 09:31 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 3bb1a3e1674b 7086cdb9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING: locking bug in ext4_xattr_inode_iget
2023/06/07 21:30 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 7579d8f9bf90 7086cdb9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING: locking bug in ext4_xattr_inode_iget
2023/06/07 19:12 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 7579d8f9bf90 7086cdb9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING: locking bug in ext4_xattr_inode_iget
2023/06/07 12:47 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci cd6bd67ad7ab 7086cdb9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING: locking bug in ext4_xattr_inode_iget
2023/06/07 12:12 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci cd6bd67ad7ab 7086cdb9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING: locking bug in ext4_xattr_inode_iget
2023/06/07 04:03 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci cd6bd67ad7ab a4ae4f42 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING: locking bug in ext4_xattr_inode_iget
2023/06/06 21:35 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci cd6bd67ad7ab a4ae4f42 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING: locking bug in ext4_xattr_inode_iget
2023/06/06 21:05 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci cd6bd67ad7ab a4ae4f42 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING: locking bug in ext4_xattr_inode_iget
2023/06/06 17:42 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci eb0f1697d729 a4ae4f42 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING: locking bug in ext4_xattr_inode_iget
2023/06/06 16:04 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci eb0f1697d729 a4ae4f42 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING: locking bug in ext4_xattr_inode_iget
2023/06/06 15:58 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci eb0f1697d729 a4ae4f42 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING: locking bug in ext4_xattr_inode_iget
2023/06/06 15:25 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci eb0f1697d729 a4ae4f42 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING: locking bug in ext4_xattr_inode_iget
2023/06/06 09:45 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci eb0f1697d729 a4ae4f42 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING: locking bug in ext4_xattr_inode_iget
2023/06/06 07:00 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci eb0f1697d729 a4ae4f42 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING: locking bug in ext4_xattr_inode_iget
2023/05/20 03:47 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci f1fcbaa18b28 96689200 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING: locking bug in ext4_xattr_inode_iget
2023/05/04 22:58 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a 3a560463 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING: locking bug in ext4_xattr_inode_iget
* Struck through repros no longer work on HEAD.