Extracting prog: 2m59.089696312s
Minimizing prog: 8m13.542714596s
Simplifying prog options: 0s
Extracting C: 1m48.936166976s
Simplifying C: 12m53.610273803s
extracting reproducer from 1 programs
testing a last program of every proc
single: executing 1 programs separately with timeout 30s
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): getegid-syz_mount_image$ext4
detailed listing:
executing program 0:
getegid()
syz_mount_image$ext4(&(0x7f0000000100)='ext4\x00', &(0x7f0000000200)='./file1\x00', 0x200000d, &(0x7f0000000040), 0x1, 0x4f6, &(0x7f00000007c0)="$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")
program did not crash
single: failed to extract reproducer
single: executing 1 programs separately with timeout 6m0s
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): getegid-syz_mount_image$ext4
detailed listing:
executing program 0:
getegid()
syz_mount_image$ext4(&(0x7f0000000100)='ext4\x00', &(0x7f0000000200)='./file1\x00', 0x200000d, &(0x7f0000000040), 0x1, 0x4f6, &(0x7f00000007c0)="$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")
program crashed: possible deadlock in dquot_commit
single: successfully extracted reproducer
found reproducer with 2 syscalls
minimizing guilty program
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): getegid
detailed listing:
executing program 0:
getegid()
program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4
detailed listing:
executing program 0:
syz_mount_image$ext4(&(0x7f0000000100)='ext4\x00', &(0x7f0000000200)='./file1\x00', 0x200000d, &(0x7f0000000040), 0x1, 0x4f6, &(0x7f00000007c0)="$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")
program crashed: possible deadlock in dquot_commit
extracting C reproducer
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4
program crashed: possible deadlock in dquot_commit
simplifying C reproducer
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4
program crashed: possible deadlock in dquot_commit
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4
program crashed: possible deadlock in dquot_commit
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:true Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4
program crashed: possible deadlock in dquot_commit
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4
program crashed: possible deadlock in dquot_commit
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4
program crashed: no output from test machine
a never seen crash title: no output from test machine, ignore
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4
program crashed: possible deadlock in dquot_commit
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4
program crashed: possible deadlock in dquot_commit
testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4
detailed listing:
executing program 0:
syz_mount_image$ext4(&(0x7f0000000100)='ext4\x00', &(0x7f0000000200)='./file1\x00', 0x200000d, &(0x7f0000000040), 0x1, 0x4f6, &(0x7f00000007c0)="$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")
program crashed: possible deadlock in dquot_commit
validation run: crashed=true
testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4
detailed listing:
executing program 0:
syz_mount_image$ext4(&(0x7f0000000100)='ext4\x00', &(0x7f0000000200)='./file1\x00', 0x200000d, &(0x7f0000000040), 0x1, 0x4f6, &(0x7f00000007c0)="$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")
program crashed: possible deadlock in dquot_commit
validation run: crashed=true
testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4
detailed listing:
executing program 0:
syz_mount_image$ext4(&(0x7f0000000100)='ext4\x00', &(0x7f0000000200)='./file1\x00', 0x200000d, &(0x7f0000000040), 0x1, 0x4f6, &(0x7f00000007c0)="$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")
program crashed: possible deadlock in dquot_commit
validation run: crashed=true
reproducing took 29m18.908140602s
repro crashed as (corrupted=false):
EXT4-fs error (device loop0): __ext4_ext_dirty:183: inode #3: comm syz.0.74: mark_inode_dirty error
Quota error (device loop0): write_blk: dquota write failed
Quota error (device loop0): qtree_write_dquot: Error -117 occurred while creating quota
EXT4-fs error (device loop0): ext4_acquire_dquot:6207: comm syz.0.74: Failed to acquire dquot type 0
======================================================
WARNING: possible circular locking dependency detected
5.15.189-syzkaller #0 Not tainted
------------------------------------------------------
syz.0.74/4460 is trying to acquire lock:
ffff88806fd88968 (&dquot->dq_lock){+.+.}-{3:3}, at: dquot_commit+0x5a/0x410 fs/quota/dquot.c:507
but task is already holding lock:
ffff888074059668 (&ei->i_data_sem/2){++++}-{3:3}, at: ext4_truncate+0x96d/0x10d0 fs/ext4/inode.c:4245
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #2 (&ei->i_data_sem/2){++++}-{3:3}:
down_read+0x44/0x2e0 kernel/locking/rwsem.c:1498
ext4_map_blocks+0x32f/0x1b30 fs/ext4/inode.c:598
ext4_getblk+0x16d/0x630 fs/ext4/inode.c:870
ext4_bread+0x26/0x180 fs/ext4/inode.c:923
ext4_quota_write+0x230/0x570 fs/ext4/super.c:6594
write_blk fs/quota/quota_tree.c:64 [inline]
get_free_dqblk+0x387/0x7d0 fs/quota/quota_tree.c:125
do_insert_tree+0x214/0x1970 fs/quota/quota_tree.c:335
do_insert_tree+0x5b1/0x1970 fs/quota/quota_tree.c:366
do_insert_tree+0x5b1/0x1970 fs/quota/quota_tree.c:366
do_insert_tree+0x5b1/0x1970 fs/quota/quota_tree.c:366
dq_insert_tree fs/quota/quota_tree.c:392 [inline]
qtree_write_dquot+0x361/0x4b0 fs/quota/quota_tree.c:411
v2_write_dquot+0x108/0x190 fs/quota/quota_v2.c:358
dquot_acquire+0x2d5/0x520 fs/quota/dquot.c:472
ext4_acquire_dquot+0x2d9/0x4a0 fs/ext4/super.c:6203
dqget+0x778/0xeb0 fs/quota/dquot.c:988
__dquot_initialize+0x3b6/0xcb0 fs/quota/dquot.c:1517
ext4_process_orphan+0x54/0x300 fs/ext4/orphan.c:329
ext4_orphan_cleanup+0xaa9/0x12e0 fs/ext4/orphan.c:474
ext4_fill_super+0x9288/0x9a00 fs/ext4/super.c:4973
mount_bdev+0x287/0x3c0 fs/super.c:1400
legacy_get_tree+0xe6/0x180 fs/fs_context.c:611
vfs_get_tree+0x88/0x270 fs/super.c:1530
do_new_mount+0x24a/0xa40 fs/namespace.c:3014
do_mount fs/namespace.c:3357 [inline]
__do_sys_mount fs/namespace.c:3565 [inline]
__se_sys_mount+0x2d6/0x3c0 fs/namespace.c:3542
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
-> #1 (&s->s_dquot.dqio_sem){++++}-{3:3}:
down_read+0x44/0x2e0 kernel/locking/rwsem.c:1498
v2_read_dquot+0x4a/0x110 fs/quota/quota_v2.c:332
dquot_acquire+0x152/0x520 fs/quota/dquot.c:463
ext4_acquire_dquot+0x2d9/0x4a0 fs/ext4/super.c:6203
dqget+0x778/0xeb0 fs/quota/dquot.c:988
__dquot_initialize+0x3b6/0xcb0 fs/quota/dquot.c:1517
ext4_process_orphan+0x54/0x300 fs/ext4/orphan.c:329
ext4_orphan_cleanup+0xaa9/0x12e0 fs/ext4/orphan.c:474
ext4_fill_super+0x9288/0x9a00 fs/ext4/super.c:4973
mount_bdev+0x287/0x3c0 fs/super.c:1400
legacy_get_tree+0xe6/0x180 fs/fs_context.c:611
vfs_get_tree+0x88/0x270 fs/super.c:1530
do_new_mount+0x24a/0xa40 fs/namespace.c:3014
do_mount fs/namespace.c:3357 [inline]
__do_sys_mount fs/namespace.c:3565 [inline]
__se_sys_mount+0x2d6/0x3c0 fs/namespace.c:3542
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
-> #0 (&dquot->dq_lock){+.+.}-{3:3}:
check_prev_add kernel/locking/lockdep.c:3053 [inline]
check_prevs_add kernel/locking/lockdep.c:3172 [inline]
validate_chain kernel/locking/lockdep.c:3788 [inline]
__lock_acquire+0x2c33/0x7c60 kernel/locking/lockdep.c:5012
lock_acquire+0x197/0x3f0 kernel/locking/lockdep.c:5623
__mutex_lock_common+0x1eb/0x2390 kernel/locking/mutex.c:596
__mutex_lock kernel/locking/mutex.c:729 [inline]
mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
dquot_commit+0x5a/0x410 fs/quota/dquot.c:507
ext4_write_dquot+0x1f0/0x360 fs/ext4/super.c:6183
mark_dquot_dirty fs/quota/dquot.c:372 [inline]
mark_all_dquot_dirty+0xf9/0x400 fs/quota/dquot.c:412
__dquot_free_space+0x7ca/0xb90 fs/quota/dquot.c:1942
dquot_free_space_nodirty include/linux/quotaops.h:376 [inline]
dquot_free_space include/linux/quotaops.h:381 [inline]
dquot_free_block include/linux/quotaops.h:392 [inline]
ext4_mb_clear_bb fs/ext4/mballoc.c:6156 [inline]
ext4_free_blocks+0x1af5/0x2480 fs/ext4/mballoc.c:6286
ext4_remove_blocks fs/ext4/extents.c:2525 [inline]
ext4_ext_rm_leaf fs/ext4/extents.c:2691 [inline]
ext4_ext_remove_space+0x1eaa/0x43a0 fs/ext4/extents.c:2939
ext4_ext_truncate+0x192/0x240 fs/ext4/extents.c:4473
ext4_truncate+0x9f1/0x10d0 fs/ext4/inode.c:4250
ext4_evict_inode+0xb43/0x1080 fs/ext4/inode.c:289
evict+0x485/0x870 fs/inode.c:647
ext4_orphan_cleanup+0xaa9/0x12e0 fs/ext4/orphan.c:474
ext4_fill_super+0x9288/0x9a00 fs/ext4/super.c:4973
mount_bdev+0x287/0x3c0 fs/super.c:1400
legacy_get_tree+0xe6/0x180 fs/fs_context.c:611
vfs_get_tree+0x88/0x270 fs/super.c:1530
do_new_mount+0x24a/0xa40 fs/namespace.c:3014
do_mount fs/namespace.c:3357 [inline]
__do_sys_mount fs/namespace.c:3565 [inline]
__se_sys_mount+0x2d6/0x3c0 fs/namespace.c:3542
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
other info that might help us debug this:
Chain exists of:
&dquot->dq_lock --> &s->s_dquot.dqio_sem --> &ei->i_data_sem/2
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&ei->i_data_sem/2);
lock(&s->s_dquot.dqio_sem);
lock(&ei->i_data_sem/2);
lock(&dquot->dq_lock);
*** DEADLOCK ***
4 locks held by syz.0.74/4460:
#0: ffff88807cf2c0e0 (&type->s_umount_key#28/1){+.+.}-{3:3}, at: alloc_super+0x201/0x950 fs/super.c:229
#1: ffff88807cf2c650 (sb_internal){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1811 [inline]
#1: ffff88807cf2c650 (sb_internal){.+.+}-{0:0}, at: sb_start_intwrite include/linux/fs.h:1928 [inline]
#1: ffff88807cf2c650 (sb_internal){.+.+}-{0:0}, at: ext4_evict_inode+0x444/0x1080 fs/ext4/inode.c:243
#2: ffff888074059668 (&ei->i_data_sem/2){++++}-{3:3}, at: ext4_truncate+0x96d/0x10d0 fs/ext4/inode.c:4245
#3: ffffffff8c23ea18 (dquot_srcu){....}-{0:0}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:311
stack backtrace:
CPU: 1 PID: 4460 Comm: syz.0.74 Not tainted 5.15.189-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106
check_noncircular+0x274/0x310 kernel/locking/lockdep.c:2133
check_prev_add kernel/locking/lockdep.c:3053 [inline]
check_prevs_add kernel/locking/lockdep.c:3172 [inline]
validate_chain kernel/locking/lockdep.c:3788 [inline]
__lock_acquire+0x2c33/0x7c60 kernel/locking/lockdep.c:5012
lock_acquire+0x197/0x3f0 kernel/locking/lockdep.c:5623
__mutex_lock_common+0x1eb/0x2390 kernel/locking/mutex.c:596
__mutex_lock kernel/locking/mutex.c:729 [inline]
mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
dquot_commit+0x5a/0x410 fs/quota/dquot.c:507
ext4_write_dquot+0x1f0/0x360 fs/ext4/super.c:6183
mark_dquot_dirty fs/quota/dquot.c:372 [inline]
mark_all_dquot_dirty+0xf9/0x400 fs/quota/dquot.c:412
__dquot_free_space+0x7ca/0xb90 fs/quota/dquot.c:1942
dquot_free_space_nodirty include/linux/quotaops.h:376 [inline]
dquot_free_space include/linux/quotaops.h:381 [inline]
dquot_free_block include/linux/quotaops.h:392 [inline]
ext4_mb_clear_bb fs/ext4/mballoc.c:6156 [inline]
ext4_free_blocks+0x1af5/0x2480 fs/ext4/mballoc.c:6286
ext4_remove_blocks fs/ext4/extents.c:2525 [inline]
ext4_ext_rm_leaf fs/ext4/extents.c:2691 [inline]
ext4_ext_remove_space+0x1eaa/0x43a0 fs/ext4/extents.c:2939
ext4_ext_truncate+0x192/0x240 fs/ext4/extents.c:4473
ext4_truncate+0x9f1/0x10d0 fs/ext4/inode.c:4250
ext4_evict_inode+0xb43/0x1080 fs/ext4/inode.c:289
evict+0x485/0x870 fs/inode.c:647
ext4_orphan_cleanup+0xaa9/0x12e0 fs/ext4/orphan.c:474
ext4_fill_super+0x9288/0x9a00 fs/ext4/super.c:4973
mount_bdev+0x287/0x3c0 fs/super.c:1400
legacy_get_tree+0xe6/0x180 fs/fs_context.c:611
vfs_get_tree+0x88/0x270 fs/super.c:1530
do_new_mount+0x24a/0xa40 fs/namespace.c:3014
do_mount fs/namespace.c:3357 [inline]
__do_sys_mount fs/namespace.c:3565 [inline]
__se_sys_mount+0x2d6/0x3c0 fs/namespace.c:3542
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f5bf5f0538a
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffca5366778 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ffca5366800 RCX: 00007f5bf5f0538a
RDX: 0000200000000100 RSI: 0000200000000200 RDI: 00007ffca53667c0
RBP: 0000200000000100 R08: 00007ffca5366800 R09: 000000000200000d
R10: 000000000200000d R11: 0000000000000246 R12: 0000200000000200
R13: 00007ffca53667c0 R14: 00000000000004f6 R15: 0000200000000040
EXT4-fs (loop0): 1 orphan inode deleted
EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: writeback.
final repro crashed as (corrupted=false):
EXT4-fs error (device loop0): __ext4_ext_dirty:183: inode #3: comm syz.0.74: mark_inode_dirty error
Quota error (device loop0): write_blk: dquota write failed
Quota error (device loop0): qtree_write_dquot: Error -117 occurred while creating quota
EXT4-fs error (device loop0): ext4_acquire_dquot:6207: comm syz.0.74: Failed to acquire dquot type 0
======================================================
WARNING: possible circular locking dependency detected
5.15.189-syzkaller #0 Not tainted
------------------------------------------------------
syz.0.74/4460 is trying to acquire lock:
ffff88806fd88968 (&dquot->dq_lock){+.+.}-{3:3}, at: dquot_commit+0x5a/0x410 fs/quota/dquot.c:507
but task is already holding lock:
ffff888074059668 (&ei->i_data_sem/2){++++}-{3:3}, at: ext4_truncate+0x96d/0x10d0 fs/ext4/inode.c:4245
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #2 (&ei->i_data_sem/2){++++}-{3:3}:
down_read+0x44/0x2e0 kernel/locking/rwsem.c:1498
ext4_map_blocks+0x32f/0x1b30 fs/ext4/inode.c:598
ext4_getblk+0x16d/0x630 fs/ext4/inode.c:870
ext4_bread+0x26/0x180 fs/ext4/inode.c:923
ext4_quota_write+0x230/0x570 fs/ext4/super.c:6594
write_blk fs/quota/quota_tree.c:64 [inline]
get_free_dqblk+0x387/0x7d0 fs/quota/quota_tree.c:125
do_insert_tree+0x214/0x1970 fs/quota/quota_tree.c:335
do_insert_tree+0x5b1/0x1970 fs/quota/quota_tree.c:366
do_insert_tree+0x5b1/0x1970 fs/quota/quota_tree.c:366
do_insert_tree+0x5b1/0x1970 fs/quota/quota_tree.c:366
dq_insert_tree fs/quota/quota_tree.c:392 [inline]
qtree_write_dquot+0x361/0x4b0 fs/quota/quota_tree.c:411
v2_write_dquot+0x108/0x190 fs/quota/quota_v2.c:358
dquot_acquire+0x2d5/0x520 fs/quota/dquot.c:472
ext4_acquire_dquot+0x2d9/0x4a0 fs/ext4/super.c:6203
dqget+0x778/0xeb0 fs/quota/dquot.c:988
__dquot_initialize+0x3b6/0xcb0 fs/quota/dquot.c:1517
ext4_process_orphan+0x54/0x300 fs/ext4/orphan.c:329
ext4_orphan_cleanup+0xaa9/0x12e0 fs/ext4/orphan.c:474
ext4_fill_super+0x9288/0x9a00 fs/ext4/super.c:4973
mount_bdev+0x287/0x3c0 fs/super.c:1400
legacy_get_tree+0xe6/0x180 fs/fs_context.c:611
vfs_get_tree+0x88/0x270 fs/super.c:1530
do_new_mount+0x24a/0xa40 fs/namespace.c:3014
do_mount fs/namespace.c:3357 [inline]
__do_sys_mount fs/namespace.c:3565 [inline]
__se_sys_mount+0x2d6/0x3c0 fs/namespace.c:3542
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
-> #1 (&s->s_dquot.dqio_sem){++++}-{3:3}:
down_read+0x44/0x2e0 kernel/locking/rwsem.c:1498
v2_read_dquot+0x4a/0x110 fs/quota/quota_v2.c:332
dquot_acquire+0x152/0x520 fs/quota/dquot.c:463
ext4_acquire_dquot+0x2d9/0x4a0 fs/ext4/super.c:6203
dqget+0x778/0xeb0 fs/quota/dquot.c:988
__dquot_initialize+0x3b6/0xcb0 fs/quota/dquot.c:1517
ext4_process_orphan+0x54/0x300 fs/ext4/orphan.c:329
ext4_orphan_cleanup+0xaa9/0x12e0 fs/ext4/orphan.c:474
ext4_fill_super+0x9288/0x9a00 fs/ext4/super.c:4973
mount_bdev+0x287/0x3c0 fs/super.c:1400
legacy_get_tree+0xe6/0x180 fs/fs_context.c:611
vfs_get_tree+0x88/0x270 fs/super.c:1530
do_new_mount+0x24a/0xa40 fs/namespace.c:3014
do_mount fs/namespace.c:3357 [inline]
__do_sys_mount fs/namespace.c:3565 [inline]
__se_sys_mount+0x2d6/0x3c0 fs/namespace.c:3542
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
-> #0 (&dquot->dq_lock){+.+.}-{3:3}:
check_prev_add kernel/locking/lockdep.c:3053 [inline]
check_prevs_add kernel/locking/lockdep.c:3172 [inline]
validate_chain kernel/locking/lockdep.c:3788 [inline]
__lock_acquire+0x2c33/0x7c60 kernel/locking/lockdep.c:5012
lock_acquire+0x197/0x3f0 kernel/locking/lockdep.c:5623
__mutex_lock_common+0x1eb/0x2390 kernel/locking/mutex.c:596
__mutex_lock kernel/locking/mutex.c:729 [inline]
mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
dquot_commit+0x5a/0x410 fs/quota/dquot.c:507
ext4_write_dquot+0x1f0/0x360 fs/ext4/super.c:6183
mark_dquot_dirty fs/quota/dquot.c:372 [inline]
mark_all_dquot_dirty+0xf9/0x400 fs/quota/dquot.c:412
__dquot_free_space+0x7ca/0xb90 fs/quota/dquot.c:1942
dquot_free_space_nodirty include/linux/quotaops.h:376 [inline]
dquot_free_space include/linux/quotaops.h:381 [inline]
dquot_free_block include/linux/quotaops.h:392 [inline]
ext4_mb_clear_bb fs/ext4/mballoc.c:6156 [inline]
ext4_free_blocks+0x1af5/0x2480 fs/ext4/mballoc.c:6286
ext4_remove_blocks fs/ext4/extents.c:2525 [inline]
ext4_ext_rm_leaf fs/ext4/extents.c:2691 [inline]
ext4_ext_remove_space+0x1eaa/0x43a0 fs/ext4/extents.c:2939
ext4_ext_truncate+0x192/0x240 fs/ext4/extents.c:4473
ext4_truncate+0x9f1/0x10d0 fs/ext4/inode.c:4250
ext4_evict_inode+0xb43/0x1080 fs/ext4/inode.c:289
evict+0x485/0x870 fs/inode.c:647
ext4_orphan_cleanup+0xaa9/0x12e0 fs/ext4/orphan.c:474
ext4_fill_super+0x9288/0x9a00 fs/ext4/super.c:4973
mount_bdev+0x287/0x3c0 fs/super.c:1400
legacy_get_tree+0xe6/0x180 fs/fs_context.c:611
vfs_get_tree+0x88/0x270 fs/super.c:1530
do_new_mount+0x24a/0xa40 fs/namespace.c:3014
do_mount fs/namespace.c:3357 [inline]
__do_sys_mount fs/namespace.c:3565 [inline]
__se_sys_mount+0x2d6/0x3c0 fs/namespace.c:3542
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
other info that might help us debug this:
Chain exists of:
&dquot->dq_lock --> &s->s_dquot.dqio_sem --> &ei->i_data_sem/2
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&ei->i_data_sem/2);
lock(&s->s_dquot.dqio_sem);
lock(&ei->i_data_sem/2);
lock(&dquot->dq_lock);
*** DEADLOCK ***
4 locks held by syz.0.74/4460:
#0: ffff88807cf2c0e0 (&type->s_umount_key#28/1){+.+.}-{3:3}, at: alloc_super+0x201/0x950 fs/super.c:229
#1: ffff88807cf2c650 (sb_internal){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1811 [inline]
#1: ffff88807cf2c650 (sb_internal){.+.+}-{0:0}, at: sb_start_intwrite include/linux/fs.h:1928 [inline]
#1: ffff88807cf2c650 (sb_internal){.+.+}-{0:0}, at: ext4_evict_inode+0x444/0x1080 fs/ext4/inode.c:243
#2: ffff888074059668 (&ei->i_data_sem/2){++++}-{3:3}, at: ext4_truncate+0x96d/0x10d0 fs/ext4/inode.c:4245
#3: ffffffff8c23ea18 (dquot_srcu){....}-{0:0}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:311
stack backtrace:
CPU: 1 PID: 4460 Comm: syz.0.74 Not tainted 5.15.189-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106
check_noncircular+0x274/0x310 kernel/locking/lockdep.c:2133
check_prev_add kernel/locking/lockdep.c:3053 [inline]
check_prevs_add kernel/locking/lockdep.c:3172 [inline]
validate_chain kernel/locking/lockdep.c:3788 [inline]
__lock_acquire+0x2c33/0x7c60 kernel/locking/lockdep.c:5012
lock_acquire+0x197/0x3f0 kernel/locking/lockdep.c:5623
__mutex_lock_common+0x1eb/0x2390 kernel/locking/mutex.c:596
__mutex_lock kernel/locking/mutex.c:729 [inline]
mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
dquot_commit+0x5a/0x410 fs/quota/dquot.c:507
ext4_write_dquot+0x1f0/0x360 fs/ext4/super.c:6183
mark_dquot_dirty fs/quota/dquot.c:372 [inline]
mark_all_dquot_dirty+0xf9/0x400 fs/quota/dquot.c:412
__dquot_free_space+0x7ca/0xb90 fs/quota/dquot.c:1942
dquot_free_space_nodirty include/linux/quotaops.h:376 [inline]
dquot_free_space include/linux/quotaops.h:381 [inline]
dquot_free_block include/linux/quotaops.h:392 [inline]
ext4_mb_clear_bb fs/ext4/mballoc.c:6156 [inline]
ext4_free_blocks+0x1af5/0x2480 fs/ext4/mballoc.c:6286
ext4_remove_blocks fs/ext4/extents.c:2525 [inline]
ext4_ext_rm_leaf fs/ext4/extents.c:2691 [inline]
ext4_ext_remove_space+0x1eaa/0x43a0 fs/ext4/extents.c:2939
ext4_ext_truncate+0x192/0x240 fs/ext4/extents.c:4473
ext4_truncate+0x9f1/0x10d0 fs/ext4/inode.c:4250
ext4_evict_inode+0xb43/0x1080 fs/ext4/inode.c:289
evict+0x485/0x870 fs/inode.c:647
ext4_orphan_cleanup+0xaa9/0x12e0 fs/ext4/orphan.c:474
ext4_fill_super+0x9288/0x9a00 fs/ext4/super.c:4973
mount_bdev+0x287/0x3c0 fs/super.c:1400
legacy_get_tree+0xe6/0x180 fs/fs_context.c:611
vfs_get_tree+0x88/0x270 fs/super.c:1530
do_new_mount+0x24a/0xa40 fs/namespace.c:3014
do_mount fs/namespace.c:3357 [inline]
__do_sys_mount fs/namespace.c:3565 [inline]
__se_sys_mount+0x2d6/0x3c0 fs/namespace.c:3542
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f5bf5f0538a
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffca5366778 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ffca5366800 RCX: 00007f5bf5f0538a
RDX: 0000200000000100 RSI: 0000200000000200 RDI: 00007ffca53667c0
RBP: 0000200000000100 R08: 00007ffca5366800 R09: 000000000200000d
R10: 000000000200000d R11: 0000000000000246 R12: 0000200000000200
R13: 00007ffca53667c0 R14: 00000000000004f6 R15: 0000200000000040
EXT4-fs (loop0): 1 orphan inode deleted
EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: writeback.