Extracting prog: 2m6.549403729s Minimizing prog: 2m43.203013284s Simplifying prog options: 0s Extracting C: 47.634449s Simplifying C: 9m47.585050099s 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', 0x2000005, &(0x7f0000003140), 0x1, 0x4fa, &(0x7f0000000cc0)="$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") program crashed: possible deadlock in dquot_commit single: successfully extracted reproducer found reproducer with 2 syscalls minimizing guilty program testing program (duration=45.204046996s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): getegid detailed listing: executing program 0: getegid() program did not crash testing program (duration=45.204046996s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4 detailed listing: executing program 0: syz_mount_image$ext4(&(0x7f0000000100)='ext4\x00', &(0x7f0000000200)='./file1\x00', 0x2000005, &(0x7f0000003140), 0x1, 0x4fa, &(0x7f0000000cc0)="$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") program crashed: possible deadlock in dquot_commit extracting C reproducer testing compiled C program (duration=45.204046996s, {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$ext4 program crashed: possible deadlock in dquot_commit simplifying C reproducer testing compiled C program (duration=45.204046996s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4 program crashed: possible deadlock in dquot_commit testing compiled C program (duration=45.204046996s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:false Cgroups:false 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$ext4 program did not crash testing compiled C program (duration=45.204046996s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4 program crashed: possible deadlock in dquot_commit testing compiled C program (duration=45.204046996s, {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$ext4 program crashed: possible deadlock in dquot_commit testing compiled C program (duration=45.204046996s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4 program crashed: possible deadlock in dquot_commit testing compiled C program (duration=45.204046996s, {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$ext4 program did not crash testing compiled C program (duration=45.204046996s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4 program crashed: possible deadlock in dquot_commit testing compiled C program (duration=45.204046996s, {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$ext4 program crashed: possible deadlock in dquot_commit testing program (duration=45.204046996s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4 detailed listing: executing program 0: syz_mount_image$ext4(&(0x7f0000000100)='ext4\x00', &(0x7f0000000200)='./file1\x00', 0x2000005, &(0x7f0000003140), 0x1, 0x4fa, &(0x7f0000000cc0)="$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") program crashed: possible deadlock in dquot_commit validation run: crashed=true testing program (duration=45.204046996s, {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', 0x2000005, &(0x7f0000003140), 0x1, 0x4fa, &(0x7f0000000cc0)="$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") program crashed: possible deadlock in dquot_commit validation run: crashed=true testing program (duration=45.204046996s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4 detailed listing: executing program 0: syz_mount_image$ext4(&(0x7f0000000100)='ext4\x00', &(0x7f0000000200)='./file1\x00', 0x2000005, &(0x7f0000003140), 0x1, 0x4fa, &(0x7f0000000cc0)="$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") program crashed: possible deadlock in dquot_commit validation run: crashed=true reproducing took 18m27.37610548s repro crashed as (corrupted=false): EXT4-fs error (device loop0): ext4_do_update_inode:5279: inode #3: comm syz.0.79: corrupted inode contents EXT4-fs error (device loop0): ext4_dirty_inode:6156: inode #3: comm syz.0.79: mark_inode_dirty error EXT4-fs error (device loop0): ext4_do_update_inode:5279: inode #3: comm syz.0.79: corrupted inode contents EXT4-fs error (device loop0): __ext4_ext_dirty:202: inode #3: comm syz.0.79: mark_inode_dirty error EXT4-fs error (device loop0): ext4_acquire_dquot:6841: comm syz.0.79: Failed to acquire dquot type 0 ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.0.79/4533 is trying to acquire lock: ffff88806e64b928 (&dquot->dq_lock){+.+.}-{3:3}, at: dquot_commit+0x5a/0x410 fs/quota/dquot.c:507 but task is already holding lock: ffff88805ac352c8 (&ei->i_data_sem/2){++++}-{3:3}, at: ext4_truncate+0x999/0x1240 fs/ext4/inode.c:4297 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:606 ext4_getblk+0x1cc/0x6f0 fs/ext4/inode.c:892 ext4_bread+0x26/0x170 fs/ext4/inode.c:948 ext4_quota_write+0x236/0x580 fs/ext4/super.c:7228 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:6837 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:5574 [inline] ext4_fill_super+0x6ee3/0x78c0 fs/ext4/super.c:5693 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:6837 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:5574 [inline] ext4_fill_super+0x6ee3/0x78c0 fs/ext4/super.c:5693 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:6817 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:6153 [inline] ext4_free_blocks+0x1bf3/0x26a0 fs/ext4/mballoc.c:6283 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:4476 ext4_truncate+0xa23/0x1240 fs/ext4/inode.c:4302 ext4_evict_inode+0xb41/0x1110 fs/ext4/inode.c:288 evict+0x4c9/0x8d0 fs/inode.c:705 ext4_orphan_cleanup+0xbeb/0x1420 fs/ext4/orphan.c:472 __ext4_fill_super fs/ext4/super.c:5574 [inline] ext4_fill_super+0x6ee3/0x78c0 fs/ext4/super.c:5693 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.0.79/4533: #0: ffff88807ddaa0e0 (&type->s_umount_key#28/1){+.+.}-{3:3}, at: alloc_super+0x1fa/0x930 fs/super.c:228 #1: ffff88807ddaa650 (sb_internal){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1891 [inline] #1: ffff88807ddaa650 (sb_internal){.+.+}-{0:0}, at: sb_start_intwrite include/linux/fs.h:2013 [inline] #1: ffff88807ddaa650 (sb_internal){.+.+}-{0:0}, at: ext4_evict_inode+0x43c/0x1110 fs/ext4/inode.c:242 #2: ffff88805ac352c8 (&ei->i_data_sem/2){++++}-{3:3}, at: ext4_truncate+0x999/0x1240 fs/ext4/inode.c:4297 #3: ffffffff8cc75248 (dquot_srcu){....}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline] #3: ffffffff8cc75248 (dquot_srcu){....}-{0:0}, at: srcu_read_lock include/linux/srcu.h:165 [inline] #3: ffffffff8cc75248 (dquot_srcu){....}-{0:0}, at: __dquot_free_space+0x174/0xbc0 fs/quota/dquot.c:1915 stack backtrace: CPU: 1 PID: 4533 Comm: syz.0.79 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 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:6817 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:6153 [inline] ext4_free_blocks+0x1bf3/0x26a0 fs/ext4/mballoc.c:6283 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:4476 ext4_truncate+0xa23/0x1240 fs/ext4/inode.c:4302 ext4_evict_inode+0xb41/0x1110 fs/ext4/inode.c:288 evict+0x4c9/0x8d0 fs/inode.c:705 ext4_orphan_cleanup+0xbeb/0x1420 fs/ext4/orphan.c:472 __ext4_fill_super fs/ext4/super.c:5574 [inline] ext4_fill_super+0x6ee3/0x78c0 fs/ext4/super.c:5693 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: 0033:0x7f4b8d39e0ca 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:00007ffebba54b58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007ffebba54be0 RCX: 00007f4b8d39e0ca RDX: 0000200000000100 RSI: 0000200000000200 RDI: 00007ffebba54ba0 RBP: 0000200000000100 R08: 00007ffebba54be0 R09: 0000000002000005 R10: 0000000002000005 R11: 0000000000000246 R12: 0000200000000200 R13: 00007ffebba54ba0 R14: 00000000000004fa R15: 0000200000003140 EXT4-fs (loop0): 1 orphan inode deleted final repro crashed as (corrupted=false): EXT4-fs error (device loop0): ext4_do_update_inode:5279: inode #3: comm syz.0.79: corrupted inode contents EXT4-fs error (device loop0): ext4_dirty_inode:6156: inode #3: comm syz.0.79: mark_inode_dirty error EXT4-fs error (device loop0): ext4_do_update_inode:5279: inode #3: comm syz.0.79: corrupted inode contents EXT4-fs error (device loop0): __ext4_ext_dirty:202: inode #3: comm syz.0.79: mark_inode_dirty error EXT4-fs error (device loop0): ext4_acquire_dquot:6841: comm syz.0.79: Failed to acquire dquot type 0 ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.0.79/4533 is trying to acquire lock: ffff88806e64b928 (&dquot->dq_lock){+.+.}-{3:3}, at: dquot_commit+0x5a/0x410 fs/quota/dquot.c:507 but task is already holding lock: ffff88805ac352c8 (&ei->i_data_sem/2){++++}-{3:3}, at: ext4_truncate+0x999/0x1240 fs/ext4/inode.c:4297 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:606 ext4_getblk+0x1cc/0x6f0 fs/ext4/inode.c:892 ext4_bread+0x26/0x170 fs/ext4/inode.c:948 ext4_quota_write+0x236/0x580 fs/ext4/super.c:7228 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:6837 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:5574 [inline] ext4_fill_super+0x6ee3/0x78c0 fs/ext4/super.c:5693 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:6837 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:5574 [inline] ext4_fill_super+0x6ee3/0x78c0 fs/ext4/super.c:5693 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:6817 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:6153 [inline] ext4_free_blocks+0x1bf3/0x26a0 fs/ext4/mballoc.c:6283 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:4476 ext4_truncate+0xa23/0x1240 fs/ext4/inode.c:4302 ext4_evict_inode+0xb41/0x1110 fs/ext4/inode.c:288 evict+0x4c9/0x8d0 fs/inode.c:705 ext4_orphan_cleanup+0xbeb/0x1420 fs/ext4/orphan.c:472 __ext4_fill_super fs/ext4/super.c:5574 [inline] ext4_fill_super+0x6ee3/0x78c0 fs/ext4/super.c:5693 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.0.79/4533: #0: ffff88807ddaa0e0 (&type->s_umount_key#28/1){+.+.}-{3:3}, at: alloc_super+0x1fa/0x930 fs/super.c:228 #1: ffff88807ddaa650 (sb_internal){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1891 [inline] #1: ffff88807ddaa650 (sb_internal){.+.+}-{0:0}, at: sb_start_intwrite include/linux/fs.h:2013 [inline] #1: ffff88807ddaa650 (sb_internal){.+.+}-{0:0}, at: ext4_evict_inode+0x43c/0x1110 fs/ext4/inode.c:242 #2: ffff88805ac352c8 (&ei->i_data_sem/2){++++}-{3:3}, at: ext4_truncate+0x999/0x1240 fs/ext4/inode.c:4297 #3: ffffffff8cc75248 (dquot_srcu){....}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline] #3: ffffffff8cc75248 (dquot_srcu){....}-{0:0}, at: srcu_read_lock include/linux/srcu.h:165 [inline] #3: ffffffff8cc75248 (dquot_srcu){....}-{0:0}, at: __dquot_free_space+0x174/0xbc0 fs/quota/dquot.c:1915 stack backtrace: CPU: 1 PID: 4533 Comm: syz.0.79 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 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:6817 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:6153 [inline] ext4_free_blocks+0x1bf3/0x26a0 fs/ext4/mballoc.c:6283 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:4476 ext4_truncate+0xa23/0x1240 fs/ext4/inode.c:4302 ext4_evict_inode+0xb41/0x1110 fs/ext4/inode.c:288 evict+0x4c9/0x8d0 fs/inode.c:705 ext4_orphan_cleanup+0xbeb/0x1420 fs/ext4/orphan.c:472 __ext4_fill_super fs/ext4/super.c:5574 [inline] ext4_fill_super+0x6ee3/0x78c0 fs/ext4/super.c:5693 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: 0033:0x7f4b8d39e0ca 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:00007ffebba54b58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007ffebba54be0 RCX: 00007f4b8d39e0ca RDX: 0000200000000100 RSI: 0000200000000200 RDI: 00007ffebba54ba0 RBP: 0000200000000100 R08: 00007ffebba54be0 R09: 0000000002000005 R10: 0000000002000005 R11: 0000000000000246 R12: 0000200000000200 R13: 00007ffebba54ba0 R14: 00000000000004fa R15: 0000200000003140 EXT4-fs (loop0): 1 orphan inode deleted