===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260114 #1 Not tainted ------------------------------------- syz-executor.7/4127 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.7/4127: #0: ffff88800fc003f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88801b1303e0 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800fc04950 (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: 4127 Comm: syz-executor.7 Not tainted 6.19.0-rc5-next-20260114 #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 do_symlinkat+0x153/0x440 __x64_sys_symlink+0x79/0xa0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa9b32ea427 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:00007ffcc101edf8 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fa9b32ea427 RDX: 00007ffcc101eed7 RSI: 00007fa9b3345019 RDI: 00007ffcc101eec0 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffcc101ec90 R10: 00007ffcc101eb47 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffcc101eec0 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.7/4127 Modules linked in: CPU: 0 UID: 0 PID: 4127 Comm: syz-executor.7 Not tainted 6.19.0-rc5-next-20260114 #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 16 c0 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 24 74 03 e8 bc 5c 56 00 e9 RSP: 0018:ffff88805172f9a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff8880488db700 RCX: ffffffff81565a27 RDX: 0000000000000000 RSI: ffffffff81565a30 RDI: ffff8880488dbafc RBP: ffff8880488db700 R08: 0000000000000000 R09: fffffbfff0ba6ffc R10: 0000000000000000 R11: 0000000000000001 R12: ffff8880488db700 R13: 0000000000000001 R14: ffffffff85c0e780 R15: ffff888016bb32c0 FS: 0000555577223400(0000) GS:ffff8880e5343000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa9b336a547 CR3: 00000000463ae000 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 do_symlinkat+0x153/0x440 __x64_sys_symlink+0x79/0xa0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa9b32ea427 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:00007ffcc101edf8 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fa9b32ea427 RDX: 00007ffcc101eed7 RSI: 00007fa9b3345019 RDI: 00007ffcc101eec0 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffcc101ec90 R10: 00007ffcc101eb47 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffcc101eec0 irq event stamp: 157 hardirqs last enabled at (157): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (156): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (152): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (150): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- EXT4-fs: Mount option(s) incompatible with ext2 EXT4-fs: Mount option(s) incompatible with ext2 EXT4-fs (loop2): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs (loop2): unmounting filesystem 00000000-0000-0000-0000-000000000000. EXT4-fs (loop2): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. netlink: 16 bytes leftover after parsing attributes in process `syz-executor.6'. netlink: 16 bytes leftover after parsing attributes in process `syz-executor.6'. EXT4-fs (loop2): unmounting filesystem 00000000-0000-0000-0000-000000000000. netlink: 16 bytes leftover after parsing attributes in process `syz-executor.6'. EXT4-fs (loop2): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. netlink: 16 bytes leftover after parsing attributes in process `syz-executor.0'. EXT4-fs (loop2): unmounting filesystem 00000000-0000-0000-0000-000000000000. netlink: 16 bytes leftover after parsing attributes in process `syz-executor.0'. netlink: 16 bytes leftover after parsing attributes in process `syz-executor.6'. EXT4-fs (loop2): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs (loop2): unmounting filesystem 00000000-0000-0000-0000-000000000000. netlink: 16 bytes leftover after parsing attributes in process `syz-executor.0'. netlink: 16 bytes leftover after parsing attributes in process `syz-executor.6'. audit: type=1400 audit(1768379652.239:13): avc: denied { create } for pid=4506 comm="syz-executor.6" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:auditd_log_t:s0 tclass=key permissive=1 EXT4-fs warning (device sda): verify_group_input:136: Cannot add at group 2 (only 16 groups) EXT4-fs warning (device sda): verify_group_input:136: Cannot add at group 2 (only 16 groups) perf: interrupt took too long (2530 > 2500), lowering kernel.perf_event_max_sample_rate to 79000 perf: interrupt took too long (3185 > 3162), lowering kernel.perf_event_max_sample_rate to 62000 perf: interrupt took too long (3996 > 3981), lowering kernel.perf_event_max_sample_rate to 50000 perf: interrupt took too long (4999 > 4995), lowering kernel.perf_event_max_sample_rate to 40000 perf: interrupt took too long (6293 > 6248), lowering kernel.perf_event_max_sample_rate to 31000 set_capacity_and_notify: 9 callbacks suppressed loop0: detected capacity change from 0 to 512 EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. ext4 filesystem being mounted at /syzkaller-testdir470037013/syzkaller.AmWYz9/48/file0 supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop0: detected capacity change from 0 to 512 EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. ext4 filesystem being mounted at /syzkaller-testdir470037013/syzkaller.AmWYz9/49/file0 supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop0: detected capacity change from 0 to 512 EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. ext4 filesystem being mounted at /syzkaller-testdir470037013/syzkaller.AmWYz9/50/file0 supports timestamps until 2038-01-19 (0x7fffffff) syz-executor.5 calls setitimer() with new_value NULL pointer. Misfeature support will be removed EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop0: detected capacity change from 0 to 512 EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. ext4 filesystem being mounted at /syzkaller-testdir470037013/syzkaller.AmWYz9/51/file0 supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. netlink: 12 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 12 bytes leftover after parsing attributes in process `syz-executor.3'. loop3: detected capacity change from 0 to 368 capability: warning: `syz-executor.0' uses deprecated v2 capabilities in a way that may be insecure