FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
=====================================
WARNING: bad unlock balance detected!
CPU: 0 UID: 0 PID: 5519 Comm: syz-executor.5 Not tainted 6.19.0-rc5-next-20260116 #1 PREEMPT(lazy)
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
dump_stack_lvl+0xfa/0x120
should_fail_ex+0x4d7/0x5e0
should_failslab+0xc2/0x120
kmem_cache_alloc_noprof+0x80/0x760
jbd2_journal_add_journal_head+0x367/0x5d0
jbd2_journal_get_create_access+0x44/0x560
__ext4_journal_get_create_access+0x54/0x1b0
ext4_getblk+0x3c5/0x8e0
ext4_bread+0x2e/0x1a0
ext4_append+0x21d/0x530
ext4_init_new_dir+0x13c/0x240
ext4_mkdir+0x3c5/0xb30
vfs_mkdir+0x6d8/0xc00
filename_mkdirat+0x118/0x430
__x64_sys_mkdir+0x6e/0xd0
do_syscall_64+0xbf/0x420
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f972f3a1c27
Code: 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f972c917fa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f972f3a1c27
RDX: 0000000000000000 RSI: 00000000000001ff RDI: 0000000020000100
RBP: 00007f972c918040 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000020000500
R13: 0000000020000100 R14: 00007f972c918000 R15: 0000000020000140
ENOMEM in journal_alloc_journal_head, retrying.
6.19.0-rc5-next-20260116 #1 Not tainted
-------------------------------------
syz-executor.6/5520 is trying to release lock (
No source specified
rcu_read_lock) at:
[] __wait_on_freeing_inode+0x105/0x350
but there are no more locks to release!
other info that might help us debug this:
4 locks held by syz-executor.6/5520:
#0: ffff88800f70a3f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400
#1: ffff88801b96e330 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400
#2: ffff88800f70e950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0xe32/0x12d0
#3: ffffffff85c16898 (inode_hash_lock){+.+.}-{3:3}, at: insert_inode_locked+0xf9/0x890
stack backtrace:
CPU: 1 UID: 0 PID: 5520 Comm: syz-executor.6 Not tainted 6.19.0-rc5-next-20260116 #1 PREEMPT(lazy)
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
dump_stack_lvl+0xca/0x120
print_unlock_imbalance_bug+0x118/0x130
lock_release+0x1ee/0x270
__wait_on_freeing_inode+0x10a/0x350
insert_inode_locked+0x25f/0x890
__ext4_new_inode+0x223d/0x4cd0
ext4_symlink+0x623/0xb40
vfs_symlink+0x44b/0x840
filename_symlinkat+0x158/0x440
__x64_sys_symlink+0x82/0x110
do_syscall_64+0xbf/0x420
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fced5cf3427
Code: 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 58 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc45835268 EFLAGS: 00000202 ORIG_RAX: 0000000000000058
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fced5cf3427
RDX: 00007ffc45835343 RSI: 00007fced5d4e022 RDI: 00007ffc45835330
RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffc45835100
R10: 00007ffc45834fb7 R11: 0000000000000202 R12: 0000000000000001
R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffc45835330
------------[ cut here ]------------
WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.6/5520
Modules linked in:
CPU: 1 UID: 0 PID: 5520 Comm: syz-executor.6 Not tainted 6.19.0-rc5-next-20260116 #1 PREEMPT(lazy)
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:__rcu_read_unlock+0x25f/0x5c0
Code: f2 02 00 00 c7 43 58 01 00 00 00 bf 09 00 00 00 e8 d6 b7 de ff 4d 85 f6 0f 84 73 fe ff ff e8 38 8a 20 00 fb e9 68 fe ff ff 90 <0f> 0b 90 5b 5d 41 5c 41 5d 41 5e e9 81 4d 74 03 e8 2c 5d 56 00 e9
RSP: 0018:ffff88801ef2f9a0 EFLAGS: 00010286
RAX: 00000000ffffffff RBX: ffff88801ab59b80 RCX: ffffffff815660f7
RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff88801ab59f7c
RBP: ffff88801ab59b80 R08: 0000000000000000 R09: fffffbfff0ba7040
R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801ab59b80
R13: 0000000000000001 R14: ffffffff85c0cb10 R15: ffff88801bb26268
FS: 0000555573a89400(0000) GS:ffff8880e5442000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd023ba7790 CR3: 00000000498f9000 CR4: 0000000000350ef0
Call Trace:
__wait_on_freeing_inode+0x10f/0x350
insert_inode_locked+0x25f/0x890
__ext4_new_inode+0x223d/0x4cd0
ext4_symlink+0x623/0xb40
vfs_symlink+0x44b/0x840
filename_symlinkat+0x158/0x440
__x64_sys_symlink+0x82/0x110
do_syscall_64+0xbf/0x420
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fced5cf3427
Code: 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 58 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc45835268 EFLAGS: 00000202 ORIG_RAX: 0000000000000058
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fced5cf3427
RDX: 00007ffc45835343 RSI: 00007fced5d4e022 RDI: 00007ffc45835330
RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffc45835100
R10: 00007ffc45834fb7 R11: 0000000000000202 R12: 0000000000000001
R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffc45835330
irq event stamp: 635
hardirqs last enabled at (635): [] _raw_spin_unlock_irqrestore+0x2c/0x50
hardirqs last disabled at (634): [] _raw_spin_lock_irqsave+0x53/0x60
softirqs last enabled at (630): [] kernel_fpu_end+0x59/0x70
softirqs last disabled at (628): [] kernel_fpu_begin_mask+0x1bb/0x300
---[ end trace 0000000000000000 ]---
No source specified
No source specified
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 1 UID: 0 PID: 5523 Comm: syz-executor.6 Tainted: G W 6.19.0-rc5-next-20260116 #1 PREEMPT(lazy)
Tainted: [W]=WARN
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
dump_stack_lvl+0xfa/0x120
should_fail_ex+0x4d7/0x5e0
should_failslab+0xc2/0x120
kmem_cache_alloc_noprof+0x80/0x760
ext4_mb_new_blocks+0x23a0/0x44b0
ext4_ext_map_blocks+0x1bd2/0x6050
ext4_map_blocks+0x62d/0x1470
ext4_getblk+0x67d/0x8e0
ext4_bread+0x2e/0x1a0
ext4_append+0x21d/0x530
ext4_init_new_dir+0x13c/0x240
ext4_mkdir+0x3c5/0xb30
vfs_mkdir+0x6d8/0xc00
filename_mkdirat+0x118/0x430
__x64_sys_mkdir+0x6e/0xd0
do_syscall_64+0xbf/0x420
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fced5cf2c27
Code: 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fced3268fa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fced5cf2c27
RDX: 0000000000000000 RSI: 00000000000001ff RDI: 0000000020000100
RBP: 00007fced3269040 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000020000500
R13: 0000000020000100 R14: 00007fced3269000 R15: 0000000020000140
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 1 UID: 0 PID: 5535 Comm: syz-executor.7 Tainted: G W 6.19.0-rc5-next-20260116 #1 PREEMPT(lazy)
Tainted: [W]=WARN
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
dump_stack_lvl+0xfa/0x120
should_fail_ex+0x4d7/0x5e0
should_failslab+0xc2/0x120
kmem_cache_alloc_noprof+0x80/0x760
jbd2_journal_add_journal_head+0x367/0x5d0
jbd2_journal_get_create_access+0x44/0x560
__ext4_journal_get_create_access+0x54/0x1b0
ext4_getblk+0x3c5/0x8e0
ext4_bread+0x2e/0x1a0
ext4_append+0x21d/0x530
ext4_init_new_dir+0x13c/0x240
ext4_mkdir+0x3c5/0xb30
vfs_mkdir+0x6d8/0xc00
filename_mkdirat+0x118/0x430
__x64_sys_mkdir+0x6e/0xd0
do_syscall_64+0xbf/0x420
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa17e070c27
Code: 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa17b5e6fa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fa17e070c27
RDX: 0000000000000000 RSI: 00000000000001ff RDI: 0000000020000100
RBP: 00007fa17b5e7040 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000020000500
R13: 0000000020000100 R14: 00007fa17b5e7000 R15: 0000000020000140
No source specified
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
loop1: detected capacity change from 0 to 6
CPU: 0 UID: 0 PID: 5542 Comm: syz-executor.2 Tainted: G W 6.19.0-rc5-next-20260116 #1 PREEMPT(lazy)
Tainted: [W]=WARN
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
dump_stack_lvl+0xfa/0x120
should_fail_ex+0x4d7/0x5e0
should_failslab+0xc2/0x120
kmem_cache_alloc_noprof+0x80/0x760
ext4_mb_new_blocks+0x23a0/0x44b0
ext4_ext_map_blocks+0x1bd2/0x6050
ext4_map_blocks+0x62d/0x1470
ext4_getblk+0x67d/0x8e0
ext4_bread+0x2e/0x1a0
ext4_append+0x21d/0x530
ext4_init_new_dir+0x13c/0x240
ext4_mkdir+0x3c5/0xb30
vfs_mkdir+0x6d8/0xc00
filename_mkdirat+0x118/0x430
__x64_sys_mkdir+0x6e/0xd0
do_syscall_64+0xbf/0x420
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe8f5f43c27
Code: 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fe8f34b9fa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fe8f5f43c27
RDX: 0000000000000000 RSI: 00000000000001ff RDI: 0000000020000100
RBP: 00007fe8f34ba040 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000020000500
R13: 0000000020000100 R14: 00007fe8f34ba000 R15: 0000000020000140
FAT-fs (loop1): Directory bread(block 6) failed
No source specified
ENOMEM in journal_alloc_journal_head, retrying.
No source specified
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 0 UID: 0 PID: 5547 Comm: syz-executor.0 Tainted: G W 6.19.0-rc5-next-20260116 #1 PREEMPT(lazy)
Tainted: [W]=WARN
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
dump_stack_lvl+0xfa/0x120
should_fail_ex+0x4d7/0x5e0
should_failslab+0xc2/0x120
kmem_cache_alloc_noprof+0x80/0x760
__kernfs_new_node+0xd3/0x940
kernfs_new_node+0x13c/0x1e0
__kernfs_create_file+0x55/0x360
sysfs_add_file_mode_ns+0x21c/0x430
internal_create_group+0x662/0xeb0
loop_configure+0xc46/0x15a0
lo_ioctl+0x674/0x1cb0
blkdev_ioctl+0x365/0x6d0
__x64_sys_ioctl+0x18f/0x210
do_syscall_64+0xbf/0x420
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6a878a98d7
Code: 3c 1c 48 f7 d8 49 39 c4 72 b8 e8 a4 54 02 00 85 c0 78 bd 48 83 c4 08 4c 89 e0 5b 41 5c c3 0f 1f 44 00 00 b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f6a84e1ef48 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f6a878f3970 RCX: 00007f6a878a98d7
RDX: 0000000000000004 RSI: 0000000000004c00 RDI: 0000000000000005
RBP: 0000000000000005 R08: 0000000000000000 R09: ffffffffffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004
R13: 0000000000000004 R14: 00000000200000b0 R15: 0000000000000002
FAT-fs (loop1): Directory bread(block 6) failed
No source specified
loop0: detected capacity change from 0 to 6
No source specified
FAT-fs (loop0): Directory bread(block 6) failed
No source specified
FAT-fs (loop1): Directory bread(block 6) failed
FAT-fs (loop1): Directory bread(block 6) failed
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 0 UID: 0 PID: 5558 Comm: syz-executor.6 Tainted: G W 6.19.0-rc5-next-20260116 #1 PREEMPT(lazy)
Tainted: [W]=WARN
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
dump_stack_lvl+0xfa/0x120
should_fail_ex+0x4d7/0x5e0
should_failslab+0xc2/0x120
kmem_cache_alloc_noprof+0x80/0x760
__es_insert_extent+0xed2/0x1370
ext4_es_insert_extent+0x43d/0x1060
ext4_map_blocks+0x808/0x1470
ext4_getblk+0x67d/0x8e0
ext4_bread+0x2e/0x1a0
ext4_append+0x21d/0x530
ext4_init_new_dir+0x13c/0x240
ext4_mkdir+0x3c5/0xb30
vfs_mkdir+0x6d8/0xc00
filename_mkdirat+0x118/0x430
__x64_sys_mkdir+0x6e/0xd0
do_syscall_64+0xbf/0x420
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fced5cf2c27
Code: 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fced3268fa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fced5cf2c27
RDX: 0000000000000000 RSI: 00000000000001ff RDI: 0000000020000100
RBP: 00007fced3269040 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000020000500
R13: 0000000020000100 R14: 00007fced3269000 R15: 0000000020000140
No source specified
No source specified