===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260113 #1 Not tainted ------------------------------------- syz-executor.2/4062 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.2/4062: #0: ffff88800f72a3f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88804d02e330 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f72e950 (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: 4062 Comm: syz-executor.2 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: 0033:0x7f4acfeaa427 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:00007ffce24438e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f4acfeaa427 RDX: 00007ffce24439c7 RSI: 00007f4acff05019 RDI: 00007ffce24439b0 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffce2443780 R10: 00007ffce2443637 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffce24439b0 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.2/4062 Modules linked in: CPU: 0 UID: 0 PID: 4062 Comm: syz-executor.2 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:ffff888045b7f9a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff888050f93700 RCX: ffffffff815664c7 RDX: 0000000000000000 RSI: ffffffff815664d0 RDI: ffff888050f93afc RBP: ffff888050f93700 R08: 0000000000000000 R09: fffffbfff0ba6ff4 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888050f93700 R13: 0000000000000001 R14: ffffffff85c0f1d0 R15: ffff88804d020318 FS: 00005555609d3400(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4acff2a542 CR3: 000000000cddc000 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: 0033:0x7f4acfeaa427 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:00007ffce24438e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f4acfeaa427 RDX: 00007ffce24439c7 RSI: 00007f4acff05019 RDI: 00007ffce24439b0 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffce2443780 R10: 00007ffce2443637 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffce24439b0 irq event stamp: 185 hardirqs last enabled at (185): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (184): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (180): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (178): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_OK cmd_age=0s sr 1:0:0:0: [sr0] tag#0 Sense Key : Illegal Request [current] sr 1:0:0:0: [sr0] tag#0 Add. Sense: Invalid command operation code sr 1:0:0:0: [sr0] tag#0 CDB: Write(10) 2a 00 00 00 01 fc 00 00 0c 00 Invalid ELF header type: 3 != 1 Invalid ELF header type: 3 != 1 loop0: detected capacity change from 0 to 1024 EXT4-fs error (device loop0): ext4_quota_enable:7177: inode #3: comm syz-executor.0: iget: special inode unallocated EXT4-fs error (device loop0): ext4_quota_enable:7179: comm syz-executor.0: Bad quota inode: 3, type: 0 EXT4-fs warning (device loop0): ext4_enable_quotas:7217: Failed to enable quota tracking (type=0, err=-117, ino=3). Please run e2fsck to fix. EXT4-fs (loop0): mount failed loop0: detected capacity change from 0 to 1024 EXT4-fs error (device loop0): ext4_quota_enable:7177: inode #3: comm syz-executor.0: iget: special inode unallocated EXT4-fs error (device loop0): ext4_quota_enable:7179: comm syz-executor.0: Bad quota inode: 3, type: 0 EXT4-fs warning (device loop0): ext4_enable_quotas:7217: Failed to enable quota tracking (type=0, err=-117, ino=3). Please run e2fsck to fix. EXT4-fs (loop0): mount failed loop0: detected capacity change from 0 to 1024 EXT4-fs error (device loop0): ext4_quota_enable:7177: inode #3: comm syz-executor.0: iget: special inode unallocated EXT4-fs error (device loop0): ext4_quota_enable:7179: comm syz-executor.0: Bad quota inode: 3, type: 0 EXT4-fs warning (device loop0): ext4_enable_quotas:7217: Failed to enable quota tracking (type=0, err=-117, ino=3). Please run e2fsck to fix. EXT4-fs (loop0): mount failed loop0: detected capacity change from 0 to 1024 EXT4-fs error (device loop0): ext4_quota_enable:7177: inode #3: comm syz-executor.0: iget: special inode unallocated EXT4-fs error (device loop0): ext4_quota_enable:7179: comm syz-executor.0: Bad quota inode: 3, type: 0 EXT4-fs warning (device loop0): ext4_enable_quotas:7217: Failed to enable quota tracking (type=0, err=-117, ino=3). Please run e2fsck to fix. EXT4-fs (loop0): mount failed loop0: detected capacity change from 0 to 1024 EXT4-fs error (device loop0): ext4_quota_enable:7177: inode #3: comm syz-executor.0: iget: special inode unallocated EXT4-fs error (device loop0): ext4_quota_enable:7179: comm syz-executor.0: Bad quota inode: 3, type: 0 EXT4-fs warning (device loop0): ext4_enable_quotas:7217: Failed to enable quota tracking (type=0, err=-117, ino=3). Please run e2fsck to fix. EXT4-fs (loop0): mount failed UDPLite6: UDP-Lite is deprecated and scheduled to be removed in 2025, please contact the netdev mailing list loop3: detected capacity change from 0 to 63 FAT-fs (loop3): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) loop3: detected capacity change from 0 to 63 FAT-fs (loop3): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) loop3: detected capacity change from 0 to 63 FAT-fs (loop3): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) Bluetooth: Unknown BR/EDR signaling command 0x0c Bluetooth: Wrong link type (-22) Bluetooth: hci5: ACL packet for unknown connection handle 2745 Bluetooth: hci5: ISO packet for unknown connection handle 1106 Bluetooth: hci5: ISO packet for unknown connection handle 1106 Bluetooth: Unknown BR/EDR signaling command 0x0c Bluetooth: Wrong link type (-22) Bluetooth: hci5: ACL packet for unknown connection handle 2745 Bluetooth: hci5: ISO packet for unknown connection handle 1106 Bluetooth: hci5: ISO packet for unknown connection handle 1106 Bluetooth: hci5: link tx timeout Bluetooth: hci5: killing stalled connection 11:aa:aa:aa:aa:aa loop3: detected capacity change from 0 to 63 FAT-fs (loop3): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) Bluetooth: Unknown BR/EDR signaling command 0x0c Bluetooth: Wrong link type (-22) Bluetooth: hci5: ACL packet for unknown connection handle 2745 Bluetooth: hci5: link tx timeout Bluetooth: hci5: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci5: ISO packet for unknown connection handle 1106 Bluetooth: hci5: ISO packet for unknown connection handle 1106 Bluetooth: Unknown BR/EDR signaling command 0x0c Bluetooth: Wrong link type (-22) Bluetooth: hci2: ACL packet for unknown connection handle 2745 Bluetooth: hci2: ISO packet for unknown connection handle 1106 Bluetooth: hci2: ISO packet for unknown connection handle 1106 loop3: detected capacity change from 0 to 63 FAT-fs (loop3): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) Bluetooth: Unknown BR/EDR signaling command 0x0c Bluetooth: Unknown BR/EDR signaling command 0x0c Bluetooth: Wrong link type (-22) Bluetooth: hci2: ACL packet for unknown connection handle 2745 Bluetooth: Wrong link type (-22) Bluetooth: hci5: link tx timeout Bluetooth: hci2: link tx timeout Bluetooth: hci5: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci2: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci5: ACL packet for unknown connection handle 2745 Bluetooth: hci2: ISO packet for unknown connection handle 1106 Bluetooth: hci2: ISO packet for unknown connection handle 1106 Bluetooth: hci5: ISO packet for unknown connection handle 1106 Bluetooth: hci5: ISO packet for unknown connection handle 1106 Bluetooth: Unknown BR/EDR signaling command 0x0c Bluetooth: Wrong link type (-22) Bluetooth: hci5: ACL packet for unknown connection handle 2745 Bluetooth: hci5: ISO packet for unknown connection handle 1106 Bluetooth: hci5: ISO packet for unknown connection handle 1106 Bluetooth: hci5: link tx timeout Bluetooth: hci5: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: Unknown BR/EDR signaling command 0x0c Bluetooth: Wrong link type (-22) Bluetooth: hci2: link tx timeout Bluetooth: hci2: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci2: ACL packet for unknown connection handle 2745 Bluetooth: hci2: ISO packet for unknown connection handle 1106 Bluetooth: hci2: ISO packet for unknown connection handle 1106 loop1: detected capacity change from 0 to 512 EXT4-fs (loop1): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. loop5: detected capacity change from 0 to 192 EXT4-fs (loop1): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop5: detected capacity change from 0 to 192 audit: type=1400 audit(1768293117.219:11): avc: denied { watch_reads } for pid=4720 comm="syz-executor.7" path="/syzkaller-testdir924994209/syzkaller.4raq6w/46/file0" dev="tmpfs" ino=1 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:tmpfs_t:s0 tclass=dir permissive=1 loop1: detected capacity change from 0 to 512 EXT4-fs (loop1): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs (loop1): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop5: detected capacity change from 0 to 192 EXT4-fs (loop1): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs (loop1): unmounting filesystem 00000000-0000-0000-0000-000000000000. EXT4-fs (loop1): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none.