Extracting prog: 3m25.71269555s Minimizing prog: 7m45.008699727s Simplifying prog options: 0s Extracting C: 1m39.634506294s Simplifying C: 12m14.49737723s 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 28m23.495757548s repro crashed as (corrupted=false): EXT4-fs error (device loop0): ext4_dirty_inode:6137: inode #3: comm syz.0.66: mark_inode_dirty error EXT4-fs error (device loop0): ext4_do_update_inode:5272: inode #3: comm syz.0.66: corrupted inode contents EXT4-fs error (device loop0): __ext4_ext_dirty:202: inode #3: comm syz.0.66: mark_inode_dirty error EXT4-fs error (device loop0): ext4_acquire_dquot:6835: comm syz.0.66: Failed to acquire dquot type 0 ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.0.66/4503 is trying to acquire lock: ffff8880691bbca8 (&dquot->dq_lock){+.+.}-{3:3}, at: dquot_commit+0x5a/0x410 fs/quota/dquot.c:507 but task is already holding lock: ffff888059890c90 (&ei->i_data_sem/2){++++}-{3:3}, at: ext4_truncate+0x999/0x1240 fs/ext4/inode.c:4290 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+0x42/0x2d0 kernel/locking/rwsem.c:1520 ext4_map_blocks+0x323/0x1b70 fs/ext4/inode.c:604 ext4_getblk+0x1cc/0x6f0 fs/ext4/inode.c:890 ext4_bread+0x26/0x170 fs/ext4/inode.c:946 ext4_quota_write+0x236/0x580 fs/ext4/super.c:7222 write_blk fs/quota/quota_tree.c:70 [inline] get_free_dqblk+0x312/0x660 fs/quota/quota_tree.c:136 do_insert_tree+0x22b/0x1040 fs/quota/quota_tree.c:347 do_insert_tree+0x9eb/0x1040 fs/quota/quota_tree.c:402 do_insert_tree+0x9eb/0x1040 fs/quota/quota_tree.c:402 do_insert_tree+0x9eb/0x1040 fs/quota/quota_tree.c:402 dq_insert_tree fs/quota/quota_tree.c:432 [inline] qtree_write_dquot+0x49d/0x5d0 fs/quota/quota_tree.c:451 v2_write_dquot+0x108/0x190 fs/quota/quota_v2.c:361 dquot_acquire+0x2d5/0x520 fs/quota/dquot.c:472 ext4_acquire_dquot+0x2d9/0x4a0 fs/ext4/super.c:6831 dqget+0x778/0xeb0 fs/quota/dquot.c:988 __dquot_initialize+0x3c3/0xcd0 fs/quota/dquot.c:1517 ext4_process_orphan+0x54/0x300 fs/ext4/orphan.c:327 ext4_orphan_cleanup+0xbeb/0x1420 fs/ext4/orphan.c:472 __ext4_fill_super fs/ext4/super.c:5556 [inline] ext4_fill_super+0x7829/0x7dc0 fs/ext4/super.c:5687 get_tree_bdev+0x3f1/0x610 fs/super.c:1366 vfs_get_tree+0x88/0x270 fs/super.c:1573 do_new_mount+0x24a/0xa40 fs/namespace.c:3078 do_mount fs/namespace.c:3421 [inline] __do_sys_mount fs/namespace.c:3629 [inline] __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3606 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #1 (&s->s_dquot.dqio_sem){++++}-{3:3}: down_read+0x42/0x2d0 kernel/locking/rwsem.c:1520 v2_read_dquot+0x4a/0x110 fs/quota/quota_v2.c:335 dquot_acquire+0x152/0x520 fs/quota/dquot.c:463 ext4_acquire_dquot+0x2d9/0x4a0 fs/ext4/super.c:6831 dqget+0x778/0xeb0 fs/quota/dquot.c:988 __dquot_initialize+0x3c3/0xcd0 fs/quota/dquot.c:1517 ext4_process_orphan+0x54/0x300 fs/ext4/orphan.c:327 ext4_orphan_cleanup+0xbeb/0x1420 fs/ext4/orphan.c:472 __ext4_fill_super fs/ext4/super.c:5556 [inline] ext4_fill_super+0x7829/0x7dc0 fs/ext4/super.c:5687 get_tree_bdev+0x3f1/0x610 fs/super.c:1366 vfs_get_tree+0x88/0x270 fs/super.c:1573 do_new_mount+0x24a/0xa40 fs/namespace.c:3078 do_mount fs/namespace.c:3421 [inline] __do_sys_mount fs/namespace.c:3629 [inline] __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3606 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #0 (&dquot->dq_lock){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3090 [inline] check_prevs_add kernel/locking/lockdep.c:3209 [inline] validate_chain kernel/locking/lockdep.c:3825 [inline] __lock_acquire+0x2d07/0x7d10 kernel/locking/lockdep.c:5049 lock_acquire+0x1bb/0x4a0 kernel/locking/lockdep.c:5662 __mutex_lock_common kernel/locking/mutex.c:603 [inline] __mutex_lock+0x12d/0xaf0 kernel/locking/mutex.c:747 dquot_commit+0x5a/0x410 fs/quota/dquot.c:507 ext4_write_dquot+0x1f0/0x360 fs/ext4/super.c:6811 mark_dquot_dirty fs/quota/dquot.c:372 [inline] mark_all_dquot_dirty+0xf9/0x400 fs/quota/dquot.c:412 __dquot_free_space+0x7ec/0xbc0 fs/quota/dquot.c:1942 dquot_free_space_nodirty include/linux/quotaops.h:379 [inline] dquot_free_space include/linux/quotaops.h:384 [inline] dquot_free_block include/linux/quotaops.h:395 [inline] ext4_mb_clear_bb fs/ext4/mballoc.c:6154 [inline] ext4_free_blocks+0x1bf3/0x26a0 fs/ext4/mballoc.c:6284 ext4_remove_blocks fs/ext4/extents.c:2526 [inline] ext4_ext_rm_leaf fs/ext4/extents.c:2692 [inline] ext4_ext_remove_space+0x225f/0x44c0 fs/ext4/extents.c:2940 ext4_ext_truncate+0x211/0x370 fs/ext4/extents.c:4470 ext4_truncate+0xa23/0x1240 fs/ext4/inode.c:4295 ext4_evict_inode+0xb41/0x1110 fs/ext4/inode.c:286 evict+0x4c9/0x8d0 fs/inode.c:705 ext4_orphan_cleanup+0xbeb/0x1420 fs/ext4/orphan.c:472 __ext4_fill_super fs/ext4/super.c:5556 [inline] ext4_fill_super+0x7829/0x7dc0 fs/ext4/super.c:5687 get_tree_bdev+0x3f1/0x610 fs/super.c:1366 vfs_get_tree+0x88/0x270 fs/super.c:1573 do_new_mount+0x24a/0xa40 fs/namespace.c:3078 do_mount fs/namespace.c:3421 [inline] __do_sys_mount fs/namespace.c:3629 [inline] __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3606 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 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.0.66/4503: #0: ffff888077cec0e0 (&type->s_umount_key#28/1){+.+.}-{3:3}, at: alloc_super+0x1fa/0x930 fs/super.c:228 #1: ffff888077cec650 (sb_internal){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1891 [inline] #1: ffff888077cec650 (sb_internal){.+.+}-{0:0}, at: sb_start_intwrite include/linux/fs.h:2013 [inline] #1: ffff888077cec650 (sb_internal){.+.+}-{0:0}, at: ext4_evict_inode+0x43c/0x1110 fs/ext4/inode.c:240 #2: ffff888059890c90 (&ei->i_data_sem/2){++++}-{3:3}, at: ext4_truncate+0x999/0x1240 fs/ext4/inode.c:4290 #3: ffffffff8cc74a48 (dquot_srcu){....}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline] #3: ffffffff8cc74a48 (dquot_srcu){....}-{0:0}, at: srcu_read_lock include/linux/srcu.h:165 [inline] #3: ffffffff8cc74a48 (dquot_srcu){....}-{0:0}, at: __dquot_free_space+0x174/0xbc0 fs/quota/dquot.c:1915 stack backtrace: CPU: 1 PID: 4503 Comm: syz.0.66 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 Call Trace: dump_stack_lvl+0x188/0x24e lib/dump_stack.c:106 check_noncircular+0x296/0x330 kernel/locking/lockdep.c:2170 check_prev_add kernel/locking/lockdep.c:3090 [inline] check_prevs_add kernel/locking/lockdep.c:3209 [inline] validate_chain kernel/locking/lockdep.c:3825 [inline] __lock_acquire+0x2d07/0x7d10 kernel/locking/lockdep.c:5049 lock_acquire+0x1bb/0x4a0 kernel/locking/lockdep.c:5662 __mutex_lock_common kernel/locking/mutex.c:603 [inline] __mutex_lock+0x12d/0xaf0 kernel/locking/mutex.c:747 dquot_commit+0x5a/0x410 fs/quota/dquot.c:507 ext4_write_dquot+0x1f0/0x360 fs/ext4/super.c:6811 mark_dquot_dirty fs/quota/dquot.c:372 [inline] mark_all_dquot_dirty+0xf9/0x400 fs/quota/dquot.c:412 __dquot_free_space+0x7ec/0xbc0 fs/quota/dquot.c:1942 dquot_free_space_nodirty include/linux/quotaops.h:379 [inline] dquot_free_space include/linux/quotaops.h:384 [inline] dquot_free_block include/linux/quotaops.h:395 [inline] ext4_mb_clear_bb fs/ext4/mballoc.c:6154 [inline] ext4_free_blocks+0x1bf3/0x26a0 fs/ext4/mballoc.c:6284 ext4_remove_blocks fs/ext4/extents.c:2526 [inline] ext4_ext_rm_leaf fs/ext4/extents.c:2692 [inline] ext4_ext_remove_space+0x225f/0x44c0 fs/ext4/extents.c:2940 ext4_ext_truncate+0x211/0x370 fs/ext4/extents.c:4470 ext4_truncate+0xa23/0x1240 fs/ext4/inode.c:4295 ext4_evict_inode+0xb41/0x1110 fs/ext4/inode.c:286 evict+0x4c9/0x8d0 fs/inode.c:705 ext4_orphan_cleanup+0xbeb/0x1420 fs/ext4/orphan.c:472 __ext4_fill_super fs/ext4/super.c:5556 [inline] ext4_fill_super+0x7829/0x7dc0 fs/ext4/super.c:5687 get_tree_bdev+0x3f1/0x610 fs/super.c:1366 vfs_get_tree+0x88/0x270 fs/super.c:1573 do_new_mount+0x24a/0xa40 fs/namespace.c:3078 do_mount fs/namespace.c:3421 [inline] __do_sys_mount fs/namespace.c:3629 [inline] __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3606 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f965019da0a Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffefe3d6bc8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007ffefe3d6c50 RCX: 00007f965019da0a RDX: 0000200000000100 RSI: 0000200000000200 RDI: 00007ffefe3d6c10 RBP: 0000200000000100 R08: 00007ffefe3d6c50 R09: 000000000200000d R10: 000000000200000d R11: 0000000000000246 R12: 0000200000000200 R13: 00007ffefe3d6c10 R14: 00000000000004f6 R15: 0000200000000040 EXT4-fs (loop0): 1 orphan inode deleted final repro crashed as (corrupted=false): EXT4-fs error (device loop0): ext4_dirty_inode:6137: inode #3: comm syz.0.66: mark_inode_dirty error EXT4-fs error (device loop0): ext4_do_update_inode:5272: inode #3: comm syz.0.66: corrupted inode contents EXT4-fs error (device loop0): __ext4_ext_dirty:202: inode #3: comm syz.0.66: mark_inode_dirty error EXT4-fs error (device loop0): ext4_acquire_dquot:6835: comm syz.0.66: Failed to acquire dquot type 0 ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.0.66/4503 is trying to acquire lock: ffff8880691bbca8 (&dquot->dq_lock){+.+.}-{3:3}, at: dquot_commit+0x5a/0x410 fs/quota/dquot.c:507 but task is already holding lock: ffff888059890c90 (&ei->i_data_sem/2){++++}-{3:3}, at: ext4_truncate+0x999/0x1240 fs/ext4/inode.c:4290 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+0x42/0x2d0 kernel/locking/rwsem.c:1520 ext4_map_blocks+0x323/0x1b70 fs/ext4/inode.c:604 ext4_getblk+0x1cc/0x6f0 fs/ext4/inode.c:890 ext4_bread+0x26/0x170 fs/ext4/inode.c:946 ext4_quota_write+0x236/0x580 fs/ext4/super.c:7222 write_blk fs/quota/quota_tree.c:70 [inline] get_free_dqblk+0x312/0x660 fs/quota/quota_tree.c:136 do_insert_tree+0x22b/0x1040 fs/quota/quota_tree.c:347 do_insert_tree+0x9eb/0x1040 fs/quota/quota_tree.c:402 do_insert_tree+0x9eb/0x1040 fs/quota/quota_tree.c:402 do_insert_tree+0x9eb/0x1040 fs/quota/quota_tree.c:402 dq_insert_tree fs/quota/quota_tree.c:432 [inline] qtree_write_dquot+0x49d/0x5d0 fs/quota/quota_tree.c:451 v2_write_dquot+0x108/0x190 fs/quota/quota_v2.c:361 dquot_acquire+0x2d5/0x520 fs/quota/dquot.c:472 ext4_acquire_dquot+0x2d9/0x4a0 fs/ext4/super.c:6831 dqget+0x778/0xeb0 fs/quota/dquot.c:988 __dquot_initialize+0x3c3/0xcd0 fs/quota/dquot.c:1517 ext4_process_orphan+0x54/0x300 fs/ext4/orphan.c:327 ext4_orphan_cleanup+0xbeb/0x1420 fs/ext4/orphan.c:472 __ext4_fill_super fs/ext4/super.c:5556 [inline] ext4_fill_super+0x7829/0x7dc0 fs/ext4/super.c:5687 get_tree_bdev+0x3f1/0x610 fs/super.c:1366 vfs_get_tree+0x88/0x270 fs/super.c:1573 do_new_mount+0x24a/0xa40 fs/namespace.c:3078 do_mount fs/namespace.c:3421 [inline] __do_sys_mount fs/namespace.c:3629 [inline] __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3606 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #1 (&s->s_dquot.dqio_sem){++++}-{3:3}: down_read+0x42/0x2d0 kernel/locking/rwsem.c:1520 v2_read_dquot+0x4a/0x110 fs/quota/quota_v2.c:335 dquot_acquire+0x152/0x520 fs/quota/dquot.c:463 ext4_acquire_dquot+0x2d9/0x4a0 fs/ext4/super.c:6831 dqget+0x778/0xeb0 fs/quota/dquot.c:988 __dquot_initialize+0x3c3/0xcd0 fs/quota/dquot.c:1517 ext4_process_orphan+0x54/0x300 fs/ext4/orphan.c:327 ext4_orphan_cleanup+0xbeb/0x1420 fs/ext4/orphan.c:472 __ext4_fill_super fs/ext4/super.c:5556 [inline] ext4_fill_super+0x7829/0x7dc0 fs/ext4/super.c:5687 get_tree_bdev+0x3f1/0x610 fs/super.c:1366 vfs_get_tree+0x88/0x270 fs/super.c:1573 do_new_mount+0x24a/0xa40 fs/namespace.c:3078 do_mount fs/namespace.c:3421 [inline] __do_sys_mount fs/namespace.c:3629 [inline] __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3606 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #0 (&dquot->dq_lock){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3090 [inline] check_prevs_add kernel/locking/lockdep.c:3209 [inline] validate_chain kernel/locking/lockdep.c:3825 [inline] __lock_acquire+0x2d07/0x7d10 kernel/locking/lockdep.c:5049 lock_acquire+0x1bb/0x4a0 kernel/locking/lockdep.c:5662 __mutex_lock_common kernel/locking/mutex.c:603 [inline] __mutex_lock+0x12d/0xaf0 kernel/locking/mutex.c:747 dquot_commit+0x5a/0x410 fs/quota/dquot.c:507 ext4_write_dquot+0x1f0/0x360 fs/ext4/super.c:6811 mark_dquot_dirty fs/quota/dquot.c:372 [inline] mark_all_dquot_dirty+0xf9/0x400 fs/quota/dquot.c:412 __dquot_free_space+0x7ec/0xbc0 fs/quota/dquot.c:1942 dquot_free_space_nodirty include/linux/quotaops.h:379 [inline] dquot_free_space include/linux/quotaops.h:384 [inline] dquot_free_block include/linux/quotaops.h:395 [inline] ext4_mb_clear_bb fs/ext4/mballoc.c:6154 [inline] ext4_free_blocks+0x1bf3/0x26a0 fs/ext4/mballoc.c:6284 ext4_remove_blocks fs/ext4/extents.c:2526 [inline] ext4_ext_rm_leaf fs/ext4/extents.c:2692 [inline] ext4_ext_remove_space+0x225f/0x44c0 fs/ext4/extents.c:2940 ext4_ext_truncate+0x211/0x370 fs/ext4/extents.c:4470 ext4_truncate+0xa23/0x1240 fs/ext4/inode.c:4295 ext4_evict_inode+0xb41/0x1110 fs/ext4/inode.c:286 evict+0x4c9/0x8d0 fs/inode.c:705 ext4_orphan_cleanup+0xbeb/0x1420 fs/ext4/orphan.c:472 __ext4_fill_super fs/ext4/super.c:5556 [inline] ext4_fill_super+0x7829/0x7dc0 fs/ext4/super.c:5687 get_tree_bdev+0x3f1/0x610 fs/super.c:1366 vfs_get_tree+0x88/0x270 fs/super.c:1573 do_new_mount+0x24a/0xa40 fs/namespace.c:3078 do_mount fs/namespace.c:3421 [inline] __do_sys_mount fs/namespace.c:3629 [inline] __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3606 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 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.0.66/4503: #0: ffff888077cec0e0 (&type->s_umount_key#28/1){+.+.}-{3:3}, at: alloc_super+0x1fa/0x930 fs/super.c:228 #1: ffff888077cec650 (sb_internal){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1891 [inline] #1: ffff888077cec650 (sb_internal){.+.+}-{0:0}, at: sb_start_intwrite include/linux/fs.h:2013 [inline] #1: ffff888077cec650 (sb_internal){.+.+}-{0:0}, at: ext4_evict_inode+0x43c/0x1110 fs/ext4/inode.c:240 #2: ffff888059890c90 (&ei->i_data_sem/2){++++}-{3:3}, at: ext4_truncate+0x999/0x1240 fs/ext4/inode.c:4290 #3: ffffffff8cc74a48 (dquot_srcu){....}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline] #3: ffffffff8cc74a48 (dquot_srcu){....}-{0:0}, at: srcu_read_lock include/linux/srcu.h:165 [inline] #3: ffffffff8cc74a48 (dquot_srcu){....}-{0:0}, at: __dquot_free_space+0x174/0xbc0 fs/quota/dquot.c:1915 stack backtrace: CPU: 1 PID: 4503 Comm: syz.0.66 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 Call Trace: dump_stack_lvl+0x188/0x24e lib/dump_stack.c:106 check_noncircular+0x296/0x330 kernel/locking/lockdep.c:2170 check_prev_add kernel/locking/lockdep.c:3090 [inline] check_prevs_add kernel/locking/lockdep.c:3209 [inline] validate_chain kernel/locking/lockdep.c:3825 [inline] __lock_acquire+0x2d07/0x7d10 kernel/locking/lockdep.c:5049 lock_acquire+0x1bb/0x4a0 kernel/locking/lockdep.c:5662 __mutex_lock_common kernel/locking/mutex.c:603 [inline] __mutex_lock+0x12d/0xaf0 kernel/locking/mutex.c:747 dquot_commit+0x5a/0x410 fs/quota/dquot.c:507 ext4_write_dquot+0x1f0/0x360 fs/ext4/super.c:6811 mark_dquot_dirty fs/quota/dquot.c:372 [inline] mark_all_dquot_dirty+0xf9/0x400 fs/quota/dquot.c:412 __dquot_free_space+0x7ec/0xbc0 fs/quota/dquot.c:1942 dquot_free_space_nodirty include/linux/quotaops.h:379 [inline] dquot_free_space include/linux/quotaops.h:384 [inline] dquot_free_block include/linux/quotaops.h:395 [inline] ext4_mb_clear_bb fs/ext4/mballoc.c:6154 [inline] ext4_free_blocks+0x1bf3/0x26a0 fs/ext4/mballoc.c:6284 ext4_remove_blocks fs/ext4/extents.c:2526 [inline] ext4_ext_rm_leaf fs/ext4/extents.c:2692 [inline] ext4_ext_remove_space+0x225f/0x44c0 fs/ext4/extents.c:2940 ext4_ext_truncate+0x211/0x370 fs/ext4/extents.c:4470 ext4_truncate+0xa23/0x1240 fs/ext4/inode.c:4295 ext4_evict_inode+0xb41/0x1110 fs/ext4/inode.c:286 evict+0x4c9/0x8d0 fs/inode.c:705 ext4_orphan_cleanup+0xbeb/0x1420 fs/ext4/orphan.c:472 __ext4_fill_super fs/ext4/super.c:5556 [inline] ext4_fill_super+0x7829/0x7dc0 fs/ext4/super.c:5687 get_tree_bdev+0x3f1/0x610 fs/super.c:1366 vfs_get_tree+0x88/0x270 fs/super.c:1573 do_new_mount+0x24a/0xa40 fs/namespace.c:3078 do_mount fs/namespace.c:3421 [inline] __do_sys_mount fs/namespace.c:3629 [inline] __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3606 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f965019da0a Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffefe3d6bc8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007ffefe3d6c50 RCX: 00007f965019da0a RDX: 0000200000000100 RSI: 0000200000000200 RDI: 00007ffefe3d6c10 RBP: 0000200000000100 R08: 00007ffefe3d6c50 R09: 000000000200000d R10: 000000000200000d R11: 0000000000000246 R12: 0000200000000200 R13: 00007ffefe3d6c10 R14: 00000000000004f6 R15: 0000200000000040 EXT4-fs (loop0): 1 orphan inode deleted