===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260115 #1 Not tainted ------------------------------------- syz-executor.0/4028 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.0/4028: #0: ffff88800f8103f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff8880346d03e0 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f814950 (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: 4028 Comm: syz-executor.0 Not tainted 6.19.0-rc5-next-20260115 #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: 0033:0x7f22088a6427 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:00007ffddba32a68 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f22088a6427 RDX: 00007ffddba32b43 RSI: 00007f2208901022 RDI: 00007ffddba32b30 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffddba32900 R10: 00007ffddba327b7 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffddba32b30 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.0/4028 Modules linked in: CPU: 1 UID: 0 PID: 4028 Comm: syz-executor.0 Not tainted 6.19.0-rc5-next-20260115 #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:ffff888048fb79a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88801457d280 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff88801457d67c RBP: ffff88801457d280 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801457d280 R13: 0000000000000001 R14: ffffffff85c0c430 R15: ffff8880346bc5d0 FS: 000055558315a400(0000) GS:ffff8880e5442000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2208926540 CR3: 000000004ba33000 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: 0033:0x7f22088a6427 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:00007ffddba32a68 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f22088a6427 RDX: 00007ffddba32b43 RSI: 00007f2208901022 RDI: 00007ffddba32b30 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffddba32900 R10: 00007ffddba327b7 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffddba32b30 irq event stamp: 857 hardirqs last enabled at (857): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (856): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (852): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (850): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- netlink: 20 bytes leftover after parsing attributes in process `syz-executor.1'. audit: type=1400 audit(1768465013.746:10): avc: denied { write } for pid=4068 comm="syz-executor.1" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 syz-executor.3 (4082) used greatest stack depth: 24240 bytes left loop7: detected capacity change from 0 to 2048 EXT4-fs warning (device loop7): ext4_multi_mount_protect:328: MMP startup interrupted, failing mount loop7: detected capacity change from 0 to 2048 EXT4-fs warning (device loop7): ext4_multi_mount_protect:328: MMP startup interrupted, failing mount loop7: detected capacity change from 0 to 2048 EXT4-fs warning (device loop7): ext4_multi_mount_protect:328: MMP startup interrupted, failing mount loop7: detected capacity change from 0 to 2048 EXT4-fs warning (device loop7): ext4_multi_mount_protect:328: MMP startup interrupted, failing mount loop6: detected capacity change from 0 to 1304 audit: type=1326 audit(1768465020.466:11): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4410 comm="syz-executor.1" exe="/syz-executor.1" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7fbe91d51b19 code=0x7ffc0000 audit: type=1326 audit(1768465020.466:12): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4410 comm="syz-executor.1" exe="/syz-executor.1" sig=0 arch=c000003e syscall=298 compat=0 ip=0x7fbe91d51b19 code=0x7ffc0000 audit: type=1400 audit(1768465020.520:13): avc: denied { watch_reads } for pid=4410 comm="syz-executor.1" path="/syzkaller-testdir760410784/syzkaller.fOgYcO/32/file0" dev="sda" ino=15993 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:unlabeled_t:s0 tclass=dir permissive=1 process 'syz-executor.2' launched '/dev/fd/3/./file0' with NULL argv: empty string added audit: type=1326 audit(1768465020.671:14): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4410 comm="syz-executor.1" exe="/syz-executor.1" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7fbe91d51b19 code=0x7ffc0000 audit: type=1326 audit(1768465020.672:15): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4410 comm="syz-executor.1" exe="/syz-executor.1" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7fbe91d51b19 code=0x7ffc0000 audit: type=1326 audit(1768465020.717:16): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4410 comm="syz-executor.1" exe="/syz-executor.1" sig=0 arch=c000003e syscall=317 compat=0 ip=0x7fbe91d51b19 code=0x7ffc0000 audit: type=1326 audit(1768465020.717:17): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4410 comm="syz-executor.1" exe="/syz-executor.1" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7fbe91d51b19 code=0x7ffc0000 audit: type=1326 audit(1768465020.717:18): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4410 comm="syz-executor.1" exe="/syz-executor.1" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7fbe91d51b19 code=0x7ffc0000 audit: type=1326 audit(1768465020.717:19): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4410 comm="syz-executor.1" exe="/syz-executor.1" sig=0 arch=c000003e syscall=298 compat=0 ip=0x7fbe91d51b19 code=0x7ffc0000 audit: type=1326 audit(1768465021.560:20): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4452 comm="syz-executor.1" exe="/syz-executor.1" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7fbe91d51b19 code=0x7ffc0000 loop1: detected capacity change from 0 to 512 EXT4-fs (loop1): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. ext4 filesystem being mounted at /syzkaller-testdir760410784/syzkaller.fOgYcO/36/file0 supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs (loop1): unmounting filesystem 00000000-0000-0000-0000-000000000000.