===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260113 #1 Not tainted ------------------------------------- syz-executor.6/5227 is trying to release lock (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.6/5227: #0: ffff88800ef7e3f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88804a945020 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f818950 (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: 5227 Comm: syz-executor.6 Not tainted 6.19.0-rc5-next-20260113 #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+0x406/0xb40 vfs_symlink+0x44b/0x840 do_symlinkat+0x153/0x440 __x64_sys_symlink+0x79/0xa0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fee85c61427 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:00007fff4e79e088 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fee85c61427 RDX: 00007fff4e79e167 RSI: 00007fee85cbc019 RDI: 00007fff4e79e150 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007fff4e79df20 R10: 00007fff4e79ddd7 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007fff4e79e150 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.6/5227 Modules linked in: CPU: 1 UID: 0 PID: 5227 Comm: syz-executor.6 Not tainted 6.19.0-rc5-next-20260113 #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 a6 bb de ff 4d 85 f6 0f 84 73 fe ff ff e8 38 89 20 00 fb e9 68 fe ff ff 90 <0f> 0b 90 5b 5d 41 5c 41 5d 41 5e e9 61 f9 73 03 e8 0c 88 56 00 e9 RSP: 0018:ffff88804a0ef9a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff888022151b80 RCX: ffffffff815664c7 RDX: 0000000000000000 RSI: ffffffff815664d0 RDI: ffff888022151f7c RBP: ffff888022151b80 R08: 0000000000000000 R09: fffffbfff0ba6ff4 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888022151b80 R13: 0000000000000001 R14: ffffffff85c0e0a0 R15: ffff88804a8cebf0 FS: 0000555575693400(0000) GS:ffff8880e5442000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fee85ce1546 CR3: 000000001676d000 CR4: 0000000000350ef0 Call Trace: __wait_on_freeing_inode+0x10f/0x350 insert_inode_locked+0x25f/0x890 __ext4_new_inode+0x223d/0x4cd0 ext4_symlink+0x406/0xb40 vfs_symlink+0x44b/0x840 do_symlinkat+0x153/0x440 __x64_sys_symlink+0x79/0xa0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fee85c61427 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:00007fff4e79e088 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fee85c61427 RDX: 00007fff4e79e167 RSI: 00007fee85cbc019 RDI: 00007fff4e79e150 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007fff4e79df20 R10: 00007fff4e79ddd7 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007fff4e79e150 irq event stamp: 173 hardirqs last enabled at (173): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (172): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (168): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (166): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- loop3: detected capacity change from 0 to 33 EXT4-fs (loop3): feature flags set on rev 0 fs, running e2fsck is recommended EXT4-fs (loop3): Couldn't mount because of unsupported optional features (28000001) FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 1 UID: 0 PID: 5237 Comm: syz-executor.7 Tainted: G W 6.19.0-rc5-next-20260113 #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 __kmalloc_cache_noprof+0x80/0x780 assoc_array_delete+0xb9/0xc40 key_move+0xda/0x500 keyctl_keyring_move+0xf4/0x160 __do_sys_keyctl+0x508/0x5b0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc56c50bb19 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007fc569a81188 EFLAGS: 00000246 ORIG_RAX: 00000000000000fa RAX: ffffffffffffffda RBX: 00007fc56c61ef60 RCX: 00007fc56c50bb19 RDX: 000000002cb49ee3 RSI: 0000000032b8a5b9 RDI: 000000000000001e RBP: 00007fc569a811d0 R08: 0000000000000000 R09: 0000000000000000 R10: fffffffffffffffc R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffea1b51b3f R14: 00007fc569a81300 R15: 0000000000022000 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 UID: 0 PID: 5251 Comm: syz-executor.1 Tainted: G W 6.19.0-rc5-next-20260113 #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 __kmalloc_cache_noprof+0x80/0x780 assoc_array_insert+0xe1/0x2ae0 __key_link_begin+0xf0/0x260 key_move+0x11c/0x500 keyctl_keyring_move+0xf4/0x160 __do_sys_keyctl+0x508/0x5b0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa548b42b19 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007fa5460b8188 EFLAGS: 00000246 ORIG_RAX: 00000000000000fa RAX: ffffffffffffffda RBX: 00007fa548c55f60 RCX: 00007fa548b42b19 RDX: 000000000f71049d RSI: 0000000028487c91 RDI: 000000000000001e RBP: 00007fa5460b81d0 R08: 0000000000000000 R09: 0000000000000000 R10: fffffffffffffffc R11: 0000000000000246 R12: 0000000000000001 R13: 00007fffd9b5aebf R14: 00007fa5460b8300 R15: 0000000000022000 loop3: detected capacity change from 0 to 32 EXT4-fs (loop3): feature flags set on rev 0 fs, running e2fsck is recommended EXT4-fs (loop3): Couldn't mount because of unsupported optional features (28000001) mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium loop0: detected capacity change from 0 to 2 mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium ext3: Unknown parameter 'subj_role' mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium tmpfs: Unknown parameter 'ˆ' mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium loop0: detected capacity change from 0 to 2 mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium loop3: detected capacity change from 0 to 31 EXT4-fs (loop3): feature flags set on rev 0 fs, running e2fsck is recommended EXT4-fs (loop3): Couldn't mount because of unsupported optional features (28000001) ext3: Unknown parameter 'subj_role' mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 1 UID: 0 PID: 5283 Comm: syz-executor.7 Tainted: G W 6.19.0-rc5-next-20260113 #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 __kmalloc_cache_noprof+0x80/0x780 assoc_array_insert+0xe1/0x2ae0 __key_link_begin+0xf0/0x260 key_move+0x11c/0x500 keyctl_keyring_move+0xf4/0x160 __do_sys_keyctl+0x508/0x5b0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc56c50bb19 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007fc569a81188 EFLAGS: 00000246 ORIG_RAX: 00000000000000fa RAX: ffffffffffffffda RBX: 00007fc56c61ef60 RCX: 00007fc56c50bb19 RDX: 0000000018d3d778 RSI: 0000000038bcb627 RDI: 000000000000001e RBP: 00007fc569a811d0 R08: 0000000000000000 R09: 0000000000000000 R10: fffffffffffffffc R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffea1b51b3f R14: 00007fc569a81300 R15: 0000000000022000 loop2: detected capacity change from 0 to 120 loop2: detected capacity change from 0 to 264192 loop3: detected capacity change from 0 to 30 loop2: detected capacity change from 0 to 120 EXT4-fs (loop3): feature flags set on rev 0 fs, running e2fsck is recommended EXT4-fs (loop3): Couldn't mount because of unsupported optional features (28000001) loop2: detected capacity change from 0 to 264192 loop3: detected capacity change from 0 to 21 EXT4-fs (loop3): feature flags set on rev 0 fs, running e2fsck is recommended EXT4-fs (loop3): Couldn't mount because of unsupported optional features (28000001) FAULT_INJECTION: forcing a failure. name fail_usercopy, interval 1, probability 0, space 0, times 1 CPU: 1 UID: 0 PID: 5316 Comm: syz-executor.1 Tainted: G W 6.19.0-rc5-next-20260113 #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 _copy_to_user+0x32/0xd0 simple_read_from_buffer+0xe0/0x180 proc_fail_nth_read+0x18a/0x240 vfs_read+0x1eb/0xc70 ksys_read+0x121/0x240 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa548af569c Code: ec 28 48 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 f9 fc ff ff 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 31 c0 0f 05 <48> 3d 00 f0 ff ff 77 34 44 89 c7 48 89 44 24 08 e8 2f fd ff ff 48 RSP: 002b:00007fa5460b8170 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fa548af569c RDX: 000000000000000f RSI: 00007fa5460b81e0 RDI: 0000000000000003 RBP: 00007fa5460b81d0 R08: 0000000000000000 R09: 0000000000000000 R10: fffffffffffffffc R11: 0000000000000246 R12: 0000000000000001 R13: 00007fffd9b5aebf R14: 00007fa5460b8300 R15: 0000000000022000