syzbot


possible deadlock in ext4_multi_mount_protect

Status: fixed on 2023/07/01 16:05
Subsystems: ext4
[Documentation on labels]
Reported-by: syzbot+6b7df7d5506b32467149@syzkaller.appspotmail.com
Fix commit: 949f95ff39bf ext4: fix lockdep warning when enabling MMP
First crash: 415d, last: 326d
Discussions (3)
Title Replies (including bot) Last reply
[PATCH] ext4: Fix lockdep warning when enabling MMP 6 (6) 2023/05/13 04:59
[syzbot] [ext4?] possible deadlock in ext4_multi_mount_protect 0 (2) 2023/05/08 03:42
[syzbot] Monthly ext4 report (Apr 2023) 0 (1) 2023/04/28 15:06
Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 possible deadlock in ext4_multi_mount_protect origin:upstream C done 165 372d 414d 3/3 fixed on 2023/06/19 12:27
linux-5.15 possible deadlock in ext4_multi_mount_protect origin:lts-only C error 171 364d 414d 0/3 upstream: reported C repro on 2023/04/05 01:35

Sample crash report:
EXT4-fs (loop0): 1 truncate cleaned up
EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: writeback.
======================================================
WARNING: possible circular locking dependency detected
6.3.0-rc7-syzkaller-g14f8db1c0f9a #0 Not tainted
------------------------------------------------------
syz-executor258/5925 is trying to acquire lock:
ffff0000dba3c460 (sb_writers#3){.+.+}-{0:0}, at: ext4_multi_mount_protect+0x2f8/0x8c8 fs/ext4/mmp.c:343

but task is already holding lock:
ffff0000dba3c0e0 (&type->s_umount_key#29){++++}-{3:3}, at: vfs_fsconfig_locked fs/fsopen.c:253 [inline]
ffff0000dba3c0e0 (&type->s_umount_key#29){++++}-{3:3}, at: __do_sys_fsconfig fs/fsopen.c:439 [inline]
ffff0000dba3c0e0 (&type->s_umount_key#29){++++}-{3:3}, at: __se_sys_fsconfig fs/fsopen.c:314 [inline]
ffff0000dba3c0e0 (&type->s_umount_key#29){++++}-{3:3}, at: __arm64_sys_fsconfig+0xa14/0xd18 fs/fsopen.c:314

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #1 (&type->s_umount_key#29){++++}-{3:3}:
       down_write+0x50/0xc0 kernel/locking/rwsem.c:1573
       __do_sys_quotactl_fd fs/quota/quota.c:997 [inline]
       __se_sys_quotactl_fd fs/quota/quota.c:972 [inline]
       __arm64_sys_quotactl_fd+0x2fc/0x4a4 fs/quota/quota.c:972
       __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
       invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
       el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
       do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193
       el0_svc+0x4c/0x15c arch/arm64/kernel/entry-common.c:637
       el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
       el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591

-> #0 (sb_writers#3){.+.+}-{0:0}:
       check_prev_add kernel/locking/lockdep.c:3098 [inline]
       check_prevs_add kernel/locking/lockdep.c:3217 [inline]
       validate_chain kernel/locking/lockdep.c:3832 [inline]
       __lock_acquire+0x3338/0x764c kernel/locking/lockdep.c:5056
       lock_acquire+0x238/0x718 kernel/locking/lockdep.c:5669
       percpu_down_read include/linux/percpu-rwsem.h:51 [inline]
       __sb_start_write include/linux/fs.h:1477 [inline]
       sb_start_write include/linux/fs.h:1552 [inline]
       write_mmp_block+0xe4/0xb70 fs/ext4/mmp.c:50
       ext4_multi_mount_protect+0x2f8/0x8c8 fs/ext4/mmp.c:343
       __ext4_remount fs/ext4/super.c:6543 [inline]
       ext4_reconfigure+0x2180/0x2928 fs/ext4/super.c:6642
       reconfigure_super+0x328/0x738 fs/super.c:956
       vfs_fsconfig_locked fs/fsopen.c:254 [inline]
       __do_sys_fsconfig fs/fsopen.c:439 [inline]
       __se_sys_fsconfig fs/fsopen.c:314 [inline]
       __arm64_sys_fsconfig+0xa1c/0xd18 fs/fsopen.c:314
       __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
       invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
       el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
       do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193
       el0_svc+0x4c/0x15c arch/arm64/kernel/entry-common.c:637
       el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
       el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591

other info that might help us debug this:

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&type->s_umount_key#29);
                               lock(sb_writers#3);
                               lock(&type->s_umount_key#29);
  lock(sb_writers#3);

 *** DEADLOCK ***

2 locks held by syz-executor258/5925:
 #0: ffff0000d5b8a470 (&fc->uapi_mutex){+.+.}-{3:3}, at: __do_sys_fsconfig fs/fsopen.c:437 [inline]
 #0: ffff0000d5b8a470 (&fc->uapi_mutex){+.+.}-{3:3}, at: __se_sys_fsconfig fs/fsopen.c:314 [inline]
 #0: ffff0000d5b8a470 (&fc->uapi_mutex){+.+.}-{3:3}, at: __arm64_sys_fsconfig+0x720/0xd18 fs/fsopen.c:314
 #1: ffff0000dba3c0e0 (&type->s_umount_key#29){++++}-{3:3}, at: vfs_fsconfig_locked fs/fsopen.c:253 [inline]
 #1: ffff0000dba3c0e0 (&type->s_umount_key#29){++++}-{3:3}, at: __do_sys_fsconfig fs/fsopen.c:439 [inline]
 #1: ffff0000dba3c0e0 (&type->s_umount_key#29){++++}-{3:3}, at: __se_sys_fsconfig fs/fsopen.c:314 [inline]
 #1: ffff0000dba3c0e0 (&type->s_umount_key#29){++++}-{3:3}, at: __arm64_sys_fsconfig+0xa14/0xd18 fs/fsopen.c:314

stack backtrace:
CPU: 0 PID: 5925 Comm: syz-executor258 Not tainted 6.3.0-rc7-syzkaller-g14f8db1c0f9a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
Call trace:
 dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:233
 show_stack+0x2c/0x44 arch/arm64/kernel/stacktrace.c:240
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd0/0x124 lib/dump_stack.c:106
 dump_stack+0x1c/0x28 lib/dump_stack.c:113
 print_circular_bug+0x150/0x1b8 kernel/locking/lockdep.c:2056
 check_noncircular+0x2cc/0x378 kernel/locking/lockdep.c:2178
 check_prev_add kernel/locking/lockdep.c:3098 [inline]
 check_prevs_add kernel/locking/lockdep.c:3217 [inline]
 validate_chain kernel/locking/lockdep.c:3832 [inline]
 __lock_acquire+0x3338/0x764c kernel/locking/lockdep.c:5056
 lock_acquire+0x238/0x718 kernel/locking/lockdep.c:5669
 percpu_down_read include/linux/percpu-rwsem.h:51 [inline]
 __sb_start_write include/linux/fs.h:1477 [inline]
 sb_start_write include/linux/fs.h:1552 [inline]
 write_mmp_block+0xe4/0xb70 fs/ext4/mmp.c:50
 ext4_multi_mount_protect+0x2f8/0x8c8 fs/ext4/mmp.c:343
 __ext4_remount fs/ext4/super.c:6543 [inline]
 ext4_reconfigure+0x2180/0x2928 fs/ext4/super.c:6642
 reconfigure_super+0x328/0x738 fs/super.c:956
 vfs_fsconfig_locked fs/fsopen.c:254 [inline]
 __do_sys_fsconfig fs/fsopen.c:439 [inline]
 __se_sys_fsconfig fs/fsopen.c:314 [inline]
 __arm64_sys_fsconfig+0xa1c/0xd18 fs/fsopen.c:314
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193
 el0_svc+0x4c/0x15c arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591
EXT4-fs warning (device loop0): ext4_enable_quotas:7001: Failed to enable quota tracking (type=2, err=-22, ino=15). Please run e2fsck to fix.

Crashes (584):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/05/08 03:42 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a 90c93c40 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-gce-arm64 possible deadlock in ext4_multi_mount_protect
2023/05/14 03:10 upstream d4d58949a6ea 2b9ba477 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root possible deadlock in ext4_multi_mount_protect
2023/05/13 22:18 upstream d4d58949a6ea 2b9ba477 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root possible deadlock in ext4_multi_mount_protect
2023/05/13 07:28 upstream 9a48d6046722 2b9ba477 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root possible deadlock in ext4_multi_mount_protect
2023/05/13 02:57 upstream 76c7f8873a76 2b9ba477 .config console log report info ci-qemu-upstream possible deadlock in ext4_multi_mount_protect
2023/05/12 21:49 upstream 47a2ee5d4a0b ecca8a24 .config console log report info ci-upstream-kasan-gce-root possible deadlock in ext4_multi_mount_protect
2023/05/12 13:52 upstream cc3c44c9fda2 adb9a3cd .config console log report info ci-upstream-kasan-gce-selinux-root possible deadlock in ext4_multi_mount_protect
2023/05/12 12:28 upstream cc3c44c9fda2 adb9a3cd .config console log report info ci-upstream-kasan-gce-root possible deadlock in ext4_multi_mount_protect
2023/05/11 21:37 upstream 105131df9c3b adb9a3cd .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root possible deadlock in ext4_multi_mount_protect
2023/05/11 18:13 upstream 105131df9c3b adb9a3cd .config console log report info ci-qemu-upstream possible deadlock in ext4_multi_mount_protect
2023/05/11 05:57 upstream 80e62bc8487b 0fbd49f4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root possible deadlock in ext4_multi_mount_protect
2023/05/10 20:49 upstream 16a8829130ca 0fbd49f4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root possible deadlock in ext4_multi_mount_protect
2023/04/07 09:31 upstream f2afccfefe7b f7ba566d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root possible deadlock in ext4_multi_mount_protect
2023/05/09 11:09 upstream ba0ad6ed89fd f4168103 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 possible deadlock in ext4_multi_mount_protect
2023/05/06 18:26 linux-next 83e5775d7afd 90c93c40 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root possible deadlock in ext4_multi_mount_protect
2023/07/01 15:25 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes b104dbedbe61 bfc47836 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-riscv64 possible deadlock in ext4_multi_mount_protect
2023/06/28 20:43 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes b104dbedbe61 8064cb02 .config console log report info ci-qemu2-riscv64 possible deadlock in ext4_multi_mount_protect
2023/06/21 16:09 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes b104dbedbe61 79782afc .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-riscv64 possible deadlock in ext4_multi_mount_protect
2023/06/20 19:07 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes b104dbedbe61 0cf1feea .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-riscv64 possible deadlock in ext4_multi_mount_protect
2023/06/19 20:50 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes b104dbedbe61 d521bc56 .config console log report info ci-qemu2-riscv64 possible deadlock in ext4_multi_mount_protect
2023/06/16 08:08 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes b104dbedbe61 f3921d4d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-riscv64 possible deadlock in ext4_multi_mount_protect
2023/06/15 06:14 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes 99a670b2069c 76decb82 .config console log report info ci-qemu2-riscv64 possible deadlock in ext4_multi_mount_protect
2023/06/13 22:48 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes 99a670b2069c 2f9d8e43 .config console log report info ci-qemu2-riscv64 possible deadlock in ext4_multi_mount_protect
2023/06/12 13:20 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes 99a670b2069c 49519f06 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-riscv64 possible deadlock in ext4_multi_mount_protect
2023/06/10 19:15 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes 99a670b2069c 49519f06 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-riscv64 possible deadlock in ext4_multi_mount_protect
2023/06/10 04:10 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes 99a670b2069c 49519f06 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-riscv64 possible deadlock in ext4_multi_mount_protect
2023/06/09 03:36 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes 49a0a3731596 058b3a5a .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-riscv64 possible deadlock in ext4_multi_mount_protect
2023/05/20 03:44 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes 950b879b7f02 96689200 .config console log report info ci-qemu2-riscv64 possible deadlock in ext4_multi_mount_protect
2023/05/18 00:05 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes 950b879b7f02 3bb7af1d .config console log report info ci-qemu2-riscv64 possible deadlock in ext4_multi_mount_protect
2023/05/15 08:59 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a 2b9ba477 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 possible deadlock in ext4_multi_mount_protect
2023/05/15 06:13 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a 2b9ba477 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 possible deadlock in ext4_multi_mount_protect
2023/05/15 03:37 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a 2b9ba477 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 possible deadlock in ext4_multi_mount_protect
2023/05/14 20:27 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a 2b9ba477 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 possible deadlock in ext4_multi_mount_protect
2023/05/14 18:48 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a 2b9ba477 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 possible deadlock in ext4_multi_mount_protect
2023/05/14 15:33 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a 2b9ba477 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 possible deadlock in ext4_multi_mount_protect
2023/05/14 13:00 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a 2b9ba477 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 possible deadlock in ext4_multi_mount_protect
2023/05/14 09:57 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a 2b9ba477 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 possible deadlock in ext4_multi_mount_protect
2023/05/14 09:32 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a 2b9ba477 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 possible deadlock in ext4_multi_mount_protect
2023/05/14 01:13 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a 2b9ba477 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 possible deadlock in ext4_multi_mount_protect
2023/05/13 19:25 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a 2b9ba477 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 possible deadlock in ext4_multi_mount_protect
2023/05/13 17:27 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a 2b9ba477 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 possible deadlock in ext4_multi_mount_protect
2023/05/13 15:57 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a 2b9ba477 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 possible deadlock in ext4_multi_mount_protect
2023/05/13 12:02 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a 2b9ba477 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 possible deadlock in ext4_multi_mount_protect
2023/05/13 10:51 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a 2b9ba477 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 possible deadlock in ext4_multi_mount_protect
2023/05/13 05:04 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a 2b9ba477 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 possible deadlock in ext4_multi_mount_protect
2023/05/13 03:58 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a 2b9ba477 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 possible deadlock in ext4_multi_mount_protect
2023/05/13 00:12 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a ecca8a24 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 possible deadlock in ext4_multi_mount_protect
2023/05/12 18:53 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a ecca8a24 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 possible deadlock in ext4_multi_mount_protect
2023/05/12 17:26 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a ecca8a24 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 possible deadlock in ext4_multi_mount_protect
2023/05/12 14:54 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a ecca8a24 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 possible deadlock in ext4_multi_mount_protect
2023/05/12 09:39 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a adb9a3cd .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 possible deadlock in ext4_multi_mount_protect
2023/05/11 19:23 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a adb9a3cd .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 possible deadlock in ext4_multi_mount_protect
2023/05/11 10:46 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a 0fbd49f4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 possible deadlock in ext4_multi_mount_protect
2023/05/11 08:14 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a 0fbd49f4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 possible deadlock in ext4_multi_mount_protect
2023/04/03 20:36 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 59caa87f9dfb 7db618d0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 possible deadlock in ext4_multi_mount_protect
* Struck through repros no longer work on HEAD.