SELinux: security_context_str_to_sid (system_u) failed with errno=-22 ===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260113 #1 Not tainted ------------------------------------- syz-executor.7/4215 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.7/4215: #0: ffff88800f8b23f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88804a228d68 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f8b6950 (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: 4215 Comm: syz-executor.7 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: 0033:0x7f83e387b427 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:00007ffc76771bc8 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f83e387b427 RDX: 00007ffc76771ca7 RSI: 00007f83e38d6019 RDI: 00007ffc76771c90 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffc76771a60 R10: 00007ffc76771917 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffc76771c90 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.7/4215 Modules linked in: CPU: 0 UID: 0 PID: 4215 Comm: syz-executor.7 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:ffff88801c8e79a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88801688d280 RCX: ffffffff815664c7 RDX: 0000000000000000 RSI: ffffffff815664d0 RDI: ffff88801688d67c RBP: ffff88801688d280 R08: 0000000000000000 R09: fffffbfff0ba6ff4 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801688d280 R13: 0000000000000001 R14: ffffffff85c0c6b0 R15: ffff8880095c3c48 FS: 000055558d1d9400(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f83e38fb547 CR3: 000000000c1c6000 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: 0033:0x7f83e387b427 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:00007ffc76771bc8 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f83e387b427 RDX: 00007ffc76771ca7 RSI: 00007f83e38d6019 RDI: 00007ffc76771c90 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffc76771a60 R10: 00007ffc76771917 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffc76771c90 irq event stamp: 161 hardirqs last enabled at (161): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (160): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (156): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (154): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ WARNING: kernel/rcu/tree_exp.h:803 at rcu_exp_handler+0x12b/0x570, CPU#0: syz-executor.7/4215 Modules linked in: CPU: 0 UID: 0 PID: 4215 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 RIP: 0010:rcu_exp_handler+0x12b/0x570 Code: 03 0f b6 04 02 4c 89 e2 83 e2 07 38 d0 7f 08 84 c0 0f 85 cb 03 00 00 0f b6 43 11 84 c0 75 b6 85 c9 74 1d 0f 8f bf 00 00 00 90 <0f> 0b 90 48 83 c4 10 5b 5d 41 5c 41 5d 41 5e 41 5f e9 4f 83 74 03 RSP: 0018:ffff88806ce086f0 EFLAGS: 00010086 RAX: 0000000000000000 RBX: ffff88806ce38800 RCX: 00000000ffffffff RDX: 0000000000000001 RSI: ffff88801688d280 RDI: ffff88801688d67c RBP: ffffffff85e31080 R08: 0000000000000000 R09: fffffbfff0ccdd6a R10: 0000000000000001 R11: 0000000000000000 R12: ffff88806ce38811 R13: ffff88806ce38828 R14: ffffffff85e310f8 R15: ffff88806ce38820 FS: 000055558d1d9400(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2dd2a000 CR3: 000000000c1c6000 CR4: 0000000000350ef0 Call Trace: __flush_smp_call_function_queue+0x47e/0xef0 __sysvec_call_function_single+0x6d/0x310 sysvec_call_function_single+0x5f/0xc0 asm_sysvec_call_function_single+0x1a/0x20 RIP: 0010:unwind_next_frame+0x48/0x2540 Code: 41 54 55 53 48 83 ec 38 0f b6 04 02 84 c0 74 08 3c 03 0f 8e 2d 0b 00 00 41 8b 1f 45 31 e4 85 db 75 16 48 83 c4 38 44 89 e0 5b <5d> 41 5c 41 5d 41 5e 41 5f e9 8a 7b 9b 03 48 b8 00 00 00 00 00 fc RSP: 0018:ffff88806ce08860 EFLAGS: 00000282 RAX: 000000006ce08801 RBX: ffffffff8161d8b0 RCX: 0000000000000002 RDX: 0000000000000000 RSI: ffffffff8135f952 RDI: ffff88801688d67c RBP: ffff88806ce01000 R08: 0000000000000001 R09: ffff88806ce088d0 R10: 000000000003d1bb R11: 0000000000011898 R12: ffff88806ce08801 R13: ffff88806ce088d8 R14: ffff88806ce08c10 R15: ffff88806ce08890 arch_stack_walk+0x86/0xf0 stack_trace_save+0x8e/0xc0 kasan_save_stack+0x24/0x50 kasan_record_aux_stack+0x89/0xa0 __call_rcu_common.constprop.0+0x70/0xad0 kmem_cache_free+0x369/0x660 ext4_put_io_end_defer+0x94/0x410 ext4_end_bio+0x143/0x520 bio_endio+0x580/0x680 blk_update_request+0x30f/0x11c0 scsi_end_request+0x7a/0x9e0 scsi_io_completion+0xbf/0x1620 scsi_complete+0x37c/0x680 blk_complete_reqs+0xb2/0xf0 handle_softirqs+0x1b1/0x7d0 __irq_exit_rcu+0xc4/0x100 irq_exit_rcu+0x9/0x20 common_interrupt+0xbd/0xd0 asm_common_interrupt+0x26/0x40 RIP: 0010:finish_task_switch.isra.0+0x204/0x840 Code: e7 48 c7 03 00 00 00 00 e8 d9 80 89 03 4d 85 f6 75 ba 49 8d 7c 24 48 e8 4a 63 89 03 e8 65 1b 36 00 fb 65 48 8b 1d 34 fa 65 06 <48> 8d bb b8 14 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 RSP: 0018:ffff88801c8e7850 EFLAGS: 00000246 RAX: 0000000000000001 RBX: ffff88801688d280 RCX: ffffffff817e018b RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8147e5db RBP: ffff88801c8e7898 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff8666eb57 R11: 0000000000000000 R12: ffff88806ce379c0 R13: ffff8880163f8000 R14: ffff88806ce37a20 R15: ffff88801688d768 __schedule+0xfb9/0x4680 schedule+0xdb/0x390 __wait_on_freeing_inode+0x2e7/0x350 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: 0033:0x7f83e387b427 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:00007ffc76771bc8 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f83e387b427 RDX: 00007ffc76771ca7 RSI: 00007f83e38d6019 RDI: 00007ffc76771c90 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffc76771a60 R10: 00007ffc76771917 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffc76771c90 irq event stamp: 161 hardirqs last enabled at (161): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (160): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (156): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (154): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- sr 1:0:0:0: [sr0] tag#0 unaligned transfer blk_print_req_error: 189 callbacks suppressed I/O error, dev sr0, sector 0 op 0x1:(WRITE) flags 0x800800 phys_seg 1 prio class 2 loop7: detected capacity change from 0 to 16383 buffer_io_error: 198 callbacks suppressed Buffer I/O error on dev sr0, logical block 0, lost async page write EXT4-fs (loop7): ext4_check_descriptors: Block bitmap for group 0 not in group (block 0)! EXT4-fs (loop7): group descriptors corrupted! ---------------- Code disassembly (best guess): 0: 41 54 push %r12 2: 55 push %rbp 3: 53 push %rbx 4: 48 83 ec 38 sub $0x38,%rsp 8: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax c: 84 c0 test %al,%al e: 74 08 je 0x18 10: 3c 03 cmp $0x3,%al 12: 0f 8e 2d 0b 00 00 jle 0xb45 18: 41 8b 1f mov (%r15),%ebx 1b: 45 31 e4 xor %r12d,%r12d 1e: 85 db test %ebx,%ebx 20: 75 16 jne 0x38 22: 48 83 c4 38 add $0x38,%rsp 26: 44 89 e0 mov %r12d,%eax 29: 5b pop %rbx * 2a: 5d pop %rbp <-- trapping instruction 2b: 41 5c pop %r12 2d: 41 5d pop %r13 2f: 41 5e pop %r14 31: 41 5f pop %r15 33: e9 8a 7b 9b 03 jmpq 0x39b7bc2 38: 48 rex.W 39: b8 00 00 00 00 mov $0x0,%eax 3e: 00 fc add %bh,%ah