===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260116 #1 Not tainted ------------------------------------- syz-executor.0/284 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.0/284: #0: ffff88800a4f23f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88801a78b388 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800a4f6950 (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: 0 UID: 0 PID: 284 Comm: syz-executor.0 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_mkdir+0x331/0xb30 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: 0033:0x7f4fa8d6cc27 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:00007ffef2f73ac8 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffef2f73b50 RCX: 00007f4fa8d6cc27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007ffef2f73b50 RBP: 00007ffef2f73b2c R08: 0000000000000000 R09: 0000000000000004 R10: 00007ffef2f73866 R11: 0000000000000202 R12: 0000000000000032 R13: 000000000001cc42 R14: 0000000000000007 R15: 00007ffef2f73b90 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.0/284 Modules linked in: CPU: 0 UID: 0 PID: 284 Comm: syz-executor.0 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:ffff88801637f9e0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff8880163b0000 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff8880163b03fc RBP: ffff8880163b0000 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff8880163b0000 R13: 0000000000000001 R14: ffffffff85c10fd0 R15: ffff888053c46bf0 FS: 000055558efa2400(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f66f3caa3a4 CR3: 000000001d6f1000 CR4: 0000000000350ef0 Call Trace: __wait_on_freeing_inode+0x10f/0x350 insert_inode_locked+0x25f/0x890 __ext4_new_inode+0x223d/0x4cd0 ext4_mkdir+0x331/0xb30 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: 0033:0x7f4fa8d6cc27 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:00007ffef2f73ac8 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffef2f73b50 RCX: 00007f4fa8d6cc27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007ffef2f73b50 RBP: 00007ffef2f73b2c R08: 0000000000000000 R09: 0000000000000004 R10: 00007ffef2f73866 R11: 0000000000000202 R12: 0000000000000032 R13: 000000000001cc42 R14: 0000000000000007 R15: 00007ffef2f73b90 irq event stamp: 380405 hardirqs last enabled at (380405): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (380404): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (380400): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (380398): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- loop4: detected capacity change from 0 to 512 EXT4-fs (loop4): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. ext4 filesystem being mounted at /syzkaller-testdir750035307/syzkaller.WIUQn2/56/file0 supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs (loop4): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop4: detected capacity change from 0 to 512 EXT4-fs (loop4): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. ext4 filesystem being mounted at /syzkaller-testdir750035307/syzkaller.WIUQn2/57/file0 supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs (loop4): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop4: detected capacity change from 0 to 512 EXT4-fs (loop4): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. ext4 filesystem being mounted at /syzkaller-testdir750035307/syzkaller.WIUQn2/58/file0 supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs (loop4): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop4: detected capacity change from 0 to 512 EXT4-fs (loop4): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. ext4 filesystem being mounted at /syzkaller-testdir750035307/syzkaller.WIUQn2/59/file0 supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs (loop4): unmounting filesystem 00000000-0000-0000-0000-000000000000. syz_tun: entered allmulticast mode syz_tun: left allmulticast mode audit: type=1326 audit(1768571915.717:11): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5043 comm="syz-executor.7" exe="/syz-executor.7" sig=9 arch=c000003e syscall=231 compat=0 ip=0x7f557bcf4b19 code=0x0 audit: type=1326 audit(1768571916.532:12): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5043 comm="syz-executor.7" exe="/syz-executor.7" sig=9 arch=c000003e syscall=231 compat=0 ip=0x7f557bcf4b19 code=0x0 audit: type=1326 audit(1768571916.551:13): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5059 comm="syz-executor.7" exe="/syz-executor.7" sig=9 arch=c000003e syscall=231 compat=0 ip=0x7f557bcf4b19 code=0x0 perf: interrupt took too long (2521 > 2500), lowering kernel.perf_event_max_sample_rate to 79000 perf: interrupt took too long (3176 > 3151), lowering kernel.perf_event_max_sample_rate to 62000 syz_tun: entered allmulticast mode syz_tun: left allmulticast mode perf: interrupt took too long (3993 > 3970), lowering kernel.perf_event_max_sample_rate to 50000 perf: interrupt took too long (5000 > 4991), lowering kernel.perf_event_max_sample_rate to 40000 perf: interrupt took too long (6291 > 6250), lowering kernel.perf_event_max_sample_rate to 31000 syz_tun: entered allmulticast mode syz_tun: entered allmulticast mode syz_tun: left allmulticast mode syz_tun: left allmulticast mode syz_tun: entered allmulticast mode syz_tun: entered allmulticast mode syz_tun: left allmulticast mode syz_tun: entered allmulticast mode syz_tun: left allmulticast mode syz_tun: left allmulticast mode syz_tun: entered allmulticast mode syz_tun: entered allmulticast mode syz_tun: left allmulticast mode syz_tun: left allmulticast mode syz_tun: entered allmulticast mode syz_tun: left allmulticast mode syz_tun: entered allmulticast mode syz_tun: left allmulticast mode perf: interrupt took too long (7875 > 7863), lowering kernel.perf_event_max_sample_rate to 25000 syz_tun: entered allmulticast mode syz_tun: entered allmulticast mode syz_tun: left allmulticast mode audit: type=1326 audit(1768571917.488:14): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5119 comm="syz-executor.7" exe="/syz-executor.7" sig=9 arch=c000003e syscall=231 compat=0 ip=0x7f557bcf4b19 code=0x0 perf: interrupt took too long (9845 > 9843), lowering kernel.perf_event_max_sample_rate to 20000 syz_tun: entered allmulticast mode syz_tun: left allmulticast mode syz_tun: left allmulticast mode audit: type=1326 audit(1768571918.396:15): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5123 comm="syz-executor.7" exe="/syz-executor.7" sig=9 arch=c000003e syscall=231 compat=0 ip=0x7f557bcf4b19 code=0x0 syz_tun: entered allmulticast mode syz_tun: entered allmulticast mode syz_tun: left allmulticast mode syz_tun: left allmulticast mode syz_tun: entered allmulticast mode syz_tun: left allmulticast mode syz_tun: entered allmulticast mode syz_tun: left allmulticast mode syz_tun: entered allmulticast mode syz_tun: left allmulticast mode ======================================================= WARNING: The mand mount option has been deprecated and and is ignored by this kernel. Remove the mand option from the mount to silence this warning. ======================================================= loop4: detected capacity change from 0 to 640 EXT4-fs (loop4): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. ext4 filesystem being mounted at /syzkaller-testdir750035307/syzkaller.WIUQn2/87/file0 supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs (loop4): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop4: detected capacity change from 0 to 640 EXT4-fs (loop4): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. ext4 filesystem being mounted at /syzkaller-testdir750035307/syzkaller.WIUQn2/88/file0 supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs (loop4): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop4: detected capacity change from 0 to 640 EXT4-fs (loop4): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. ext4 filesystem being mounted at /syzkaller-testdir750035307/syzkaller.WIUQn2/89/file0 supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs (loop4): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop4: detected capacity change from 0 to 640 EXT4-fs (loop4): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. ext4 filesystem being mounted at /syzkaller-testdir750035307/syzkaller.WIUQn2/90/file0 supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs (loop4): unmounting filesystem 00000000-0000-0000-0000-000000000000.