===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260113 #1 Not tainted ------------------------------------- syz-executor.1/4304 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.1/4304: #0: ffff88800f71a3f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff888048ddd9a8 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f71e950 (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: 4304 Comm: syz-executor.1 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: 0033:0x7f1afd2e7427 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:00007ffe62041418 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f1afd2e7427 RDX: 00007ffe620414f3 RSI: 00007f1afd342022 RDI: 00007ffe620414e0 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffe620412b0 R10: 00007ffe62041167 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffe620414e0 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.1/4304 Modules linked in: CPU: 0 UID: 0 PID: 4304 Comm: syz-executor.1 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:ffff88804999f9a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88802258b700 RCX: ffffffff815664c7 RDX: 0000000000000000 RSI: ffffffff815664d0 RDI: ffff88802258bafc RBP: ffff88802258b700 R08: 0000000000000000 R09: fffffbfff0ba6ff4 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88802258b700 R13: 0000000000000001 R14: ffffffff85c0eff0 R15: ffff888048c94f58 FS: 000055557a2c9400(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1afd367541 CR3: 000000004c0b4000 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: 0033:0x7f1afd2e7427 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:00007ffe62041418 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f1afd2e7427 RDX: 00007ffe620414f3 RSI: 00007f1afd342022 RDI: 00007ffe620414e0 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffe620412b0 R10: 00007ffe62041167 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffe620414e0 irq event stamp: 321 hardirqs last enabled at (321): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (320): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (316): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (314): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- 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 : Not Ready [current] sr 1:0:0:0: [sr0] tag#0 Add. Sense: Medium not present sr 1:0:0:0: [sr0] tag#0 CDB: Read(10) 28 00 00 00 00 00 00 00 08 00 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 : Not Ready [current] sr 1:0:0:0: [sr0] tag#0 Add. Sense: Medium not present sr 1:0:0:0: [sr0] tag#0 CDB: Read(10) 28 00 00 00 00 00 00 00 08 00 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 loop2: detected capacity change from 0 to 512 EXT4-fs (loop2): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. ext4 filesystem being mounted at /syzkaller-testdir560067675/syzkaller.Ir3Eyi/17/file0 supports timestamps until 2038-01-19 (0x7fffffff) tmpfs: Bad value for 'mpol' tmpfs: Bad value for 'mpol' EXT4-fs (loop2): unmounting filesystem 00000000-0000-0000-0000-000000000000. sr 1:0:0:0: [sr0] CDROM not ready. Make sure there is a disc in the drive. mmap: syz-executor.1 (4372): VmData 37388288 exceed data ulimit 0. Update limits or use boot option ignore_rlimit_data. netlink: 'syz-executor.6': attribute type 1 has an invalid length. syz-executor.3 (4374) used greatest stack depth: 23792 bytes left netlink: 12 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 12 bytes leftover after parsing attributes in process `syz-executor.5'. lo: entered promiscuous mode lo: left promiscuous mode lo: entered promiscuous mode lo: left promiscuous mode lo: entered promiscuous mode lo: left promiscuous mode lo: entered promiscuous mode lo: left promiscuous mode sr 1:0:0:0: [sr0] tag#0 unaligned transfer blk_print_req_error: 26 callbacks suppressed I/O error, dev sr0, sector 0 op 0x1:(WRITE) flags 0x8800 phys_seg 1 prio class 2 sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 0 op 0x1:(WRITE) flags 0x8800 phys_seg 1 prio class 2 loop5: detected capacity change from 0 to 4096 EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. EXT4-fs (loop5): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop5: detected capacity change from 0 to 4096 EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. EXT4-fs (loop5): unmounting filesystem 00000000-0000-0000-0000-000000000000. Bluetooth: hci3: Opcode 0x0401 failed: -4 loop5: detected capacity change from 0 to 4096 audit: type=1326 audit(1768298260.461:12): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4658 comm="syz-executor.2" exe="/syz-executor.2" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7f93debe3b19 code=0x7ffc0000 audit: type=1326 audit(1768298260.472:13): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4658 comm="syz-executor.2" exe="/syz-executor.2" sig=0 arch=c000003e syscall=29 compat=0 ip=0x7f93debe3b19 code=0x7ffc0000 audit: type=1326 audit(1768298260.472:14): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4658 comm="syz-executor.2" exe="/syz-executor.2" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7f93debe3b19 code=0x7ffc0000 EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. audit: type=1326 audit(1768298260.475:15): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4658 comm="syz-executor.2" exe="/syz-executor.2" sig=0 arch=c000003e syscall=31 compat=0 ip=0x7f93debe3b19 code=0x7ffc0000 audit: type=1326 audit(1768298260.476:16): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4658 comm="syz-executor.2" exe="/syz-executor.2" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7f93debe3b19 code=0x7ffc0000 audit: type=1326 audit(1768298260.485:17): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4658 comm="syz-executor.2" exe="/syz-executor.2" sig=0 arch=c000003e syscall=317 compat=0 ip=0x7f93debe3b19 code=0x7ffc0000 audit: type=1326 audit(1768298260.487:18): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4658 comm="syz-executor.2" exe="/syz-executor.2" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7f93debe3b19 code=0x7ffc0000 audit: type=1326 audit(1768298260.493:19): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4658 comm="syz-executor.2" exe="/syz-executor.2" sig=0 arch=c000003e syscall=29 compat=0 ip=0x7f93debe3b19 code=0x7ffc0000 audit: type=1326 audit(1768298260.493:20): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4658 comm="syz-executor.2" exe="/syz-executor.2" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7f93debe3b19 code=0x7ffc0000 EXT4-fs (loop5): unmounting filesystem 00000000-0000-0000-0000-000000000000. audit: type=1326 audit(1768298260.680:21): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4676 comm="syz-executor.2" exe="/syz-executor.2" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7f93debe3b19 code=0x7ffc0000 loop5: detected capacity change from 0 to 4096 EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. EXT4-fs (loop5): unmounting filesystem 00000000-0000-0000-0000-000000000000. Bluetooth: hci2: command tx timeout Bluetooth: hci3: command 0x0401 tx timeout sg_write: data in/out 1245184/32 bytes for SCSI command 0x2a-- guessing data in; program syz-executor.7 not setting count and/or reply_len properly sg_write: data in/out 1245184/32 bytes for SCSI command 0x2a-- guessing data in; program syz-executor.7 not setting count and/or reply_len properly Bluetooth: hci2: command tx timeout syz-executor.0 (4747) used greatest stack depth: 23728 bytes left sg_write: data in/out 1245184/32 bytes for SCSI command 0x2a-- guessing data in; program syz-executor.7 not setting count and/or reply_len properly mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium sg_write: data in/out 1245184/32 bytes for SCSI command 0x2a-- guessing data in; program syz-executor.7 not setting count and/or reply_len properly 9p: Bad value for 'wfdno'