===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260114 #1 Not tainted ------------------------------------- syz-executor.0/8092 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.0/8092: #0: ffff88800f6b23f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88804a393d10 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f6b6950 (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: 8092 Comm: syz-executor.0 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: 0033:0x7facb77f1427 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:00007ffc9dbc0df8 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007facb77f1427 RDX: ffffffffffffffbc RSI: 00007facb784c00e RDI: 00007facb784b1dd RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffc9dbc0870 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffc9dbc0ec0 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.0/8092 Modules linked in: CPU: 1 UID: 0 PID: 8092 Comm: syz-executor.0 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:ffff888048dd79a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88804a5fb700 RCX: ffffffff81565a27 RDX: 0000000000000000 RSI: ffffffff81565a30 RDI: ffff88804a5fbafc RBP: ffff88804a5fb700 R08: 0000000000000000 R09: fffffbfff0ba6ffc R10: 0000000000000000 R11: 0000000000000001 R12: ffff88804a5fb700 R13: 0000000000000001 R14: ffffffff85c0f360 R15: ffff88804a390ca0 FS: 000055556cf27400(0000) GS:ffff8880e5443000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055556cf27708 CR3: 0000000038203000 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: 0033:0x7facb77f1427 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:00007ffc9dbc0df8 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007facb77f1427 RDX: ffffffffffffffbc RSI: 00007facb784c00e RDI: 00007facb784b1dd RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffc9dbc0870 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffc9dbc0ec0 irq event stamp: 1331 hardirqs last enabled at (1331): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (1330): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (1326): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (1324): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- netlink: 12 bytes leftover after parsing attributes in process `syz-executor.4'. Bluetooth: hci1: command 0x0c1a tx timeout Bluetooth: hci6: command 0x0406 tx timeout Bluetooth: hci5: command 0x0406 tx timeout Bluetooth: hci4: command 0x0406 tx timeout Bluetooth: hci3: command 0x0406 tx timeout Bluetooth: hci2: command 0x0406 tx timeout Bluetooth: hci0: command 0x0406 tx timeout Bluetooth: hci7: command 0x0c1a tx timeout set_capacity_and_notify: 11 callbacks suppressed loop6: detected capacity change from 0 to 64 FAT-fs (loop6): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) loop0: detected capacity change from 0 to 64 FAT-fs (loop0): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) loop3: detected capacity change from 0 to 64 FAT-fs (loop3): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) loop2: detected capacity change from 0 to 64 FAT-fs (loop2): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) loop1: detected capacity change from 0 to 255 loop1: detected capacity change from 0 to 255 netlink: 12 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 12 bytes leftover after parsing attributes in process `syz-executor.3'. loop1: detected capacity change from 0 to 255 audit: type=1400 audit(1768383443.105:17): avc: denied { watch_reads } for pid=8355 comm="syz-executor.0" path="/syzkaller-testdir804895958/syzkaller.ZPP1wO/71/file0/file0" dev="tmpfs" ino=2 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 255 loop1: detected capacity change from 0 to 255 Bluetooth: hci0: command 0x0406 tx timeout Bluetooth: hci4: command 0x0406 tx timeout Bluetooth: hci3: command 0x0406 tx timeout Bluetooth: hci2: command 0x0406 tx timeout Bluetooth: hci6: command 0x0406 tx timeout Bluetooth: hci5: command 0x0406 tx timeout Bluetooth: hci1: command 0x0c1a tx timeout Bluetooth: hci7: command 0x0c1a tx timeout audit: type=1326 audit(1768418212.229:18): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=8479 comm="syz-executor.4" exe="/syz-executor.4" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7f7378706b19 code=0x7ffc0000 audit: type=1326 audit(1768418212.233:19): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=8479 comm="syz-executor.4" exe="/syz-executor.4" sig=0 arch=c000003e syscall=186 compat=0 ip=0x7f7378706b19 code=0x7ffc0000 audit: type=1326 audit(1768418212.233:20): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=8479 comm="syz-executor.4" exe="/syz-executor.4" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7f7378706b19 code=0x7ffc0000 audit: type=1326 audit(1768418212.233:21): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=8479 comm="syz-executor.4" exe="/syz-executor.4" sig=0 arch=c000003e syscall=129 compat=0 ip=0x7f7378706b19 code=0x7ffc0000 audit: type=1326 audit(1768418212.233:22): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=8479 comm="syz-executor.4" exe="/syz-executor.4" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7f7378706b19 code=0x7ffc0000 audit: type=1326 audit(1768418212.239:23): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=8479 comm="syz-executor.4" exe="/syz-executor.4" sig=0 arch=c000003e syscall=317 compat=0 ip=0x7f7378706b19 code=0x7ffc0000 audit: type=1326 audit(1768418212.239:24): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=8479 comm="syz-executor.4" exe="/syz-executor.4" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7f7378706b19 code=0x7ffc0000 audit: type=1326 audit(1768418212.242:25): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=8479 comm="syz-executor.4" exe="/syz-executor.4" sig=0 arch=c000003e syscall=186 compat=0 ip=0x7f7378706b19 code=0x7ffc0000 audit: type=1326 audit(1768418212.509:26): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=8508 comm="syz-executor.4" exe="/syz-executor.4" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7f7378706b19 code=0x7ffc0000 mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium loop5: detected capacity change from 0 to 2048 mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium 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. 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. mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium 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. 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. mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium Bluetooth: hci1: command 0x0c1a tx timeout Bluetooth: hci7: command 0x0c1a tx timeout 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: hci7: unexpected event 0x3e length: 431 > 260 Bluetooth: hci7: unexpected subevent 0x0d length: 430 > 260 Bluetooth: hci7: Malformed LE Event: 0x0d Bluetooth: hci7: unexpected event 0x3e length: 431 > 260 Bluetooth: hci7: unexpected subevent 0x0d length: 430 > 260 Bluetooth: hci7: Malformed LE Event: 0x0d Bluetooth: hci7: unexpected event 0x3e length: 431 > 260 Bluetooth: hci7: unexpected subevent 0x0d length: 430 > 260 Bluetooth: hci7: Malformed LE Event: 0x0d Bluetooth: hci7: unexpected event 0x3e length: 431 > 260 Bluetooth: hci7: unexpected subevent 0x0d length: 430 > 260 Bluetooth: hci7: Malformed LE Event: 0x0d set_capacity_and_notify: 4 callbacks suppressed loop1: detected capacity change from 0 to 512 Bluetooth: hci7: unexpected event 0x3e length: 431 > 260 Bluetooth: hci7: unexpected subevent 0x0d length: 430 > 260 Bluetooth: hci7: Malformed LE Event: 0x0d Bluetooth: hci2: unexpected event 0x13 length: 431 > 260 Bluetooth: hci2: unexpected event 0x13 length: 431 > 260 EXT4-fs (loop1): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. ext4 filesystem being mounted at /syzkaller-testdir410260134/syzkaller.l8ENbA/54/file0 supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs (loop1): unmounting filesystem 00000000-0000-0000-0000-000000000000. 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-testdir410260134/syzkaller.l8ENbA/55/file0 supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs (loop1): unmounting filesystem 00000000-0000-0000-0000-000000000000. 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-testdir410260134/syzkaller.l8ENbA/56/file0 supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs (loop1): unmounting filesystem 00000000-0000-0000-0000-000000000000. 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-testdir410260134/syzkaller.l8ENbA/57/file0 supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs (loop1): unmounting filesystem 00000000-0000-0000-0000-000000000000. No source specified No source specified 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 40 00 I/O error, dev sr0, sector 0 op 0x0:(READ) flags 0x80700 phys_seg 26 prio class 2 FAT-fs (loop0): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1)