===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260113 #1 Not tainted ------------------------------------- syz-executor.2/4553 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.2/4553: #0: ffff88800fa743f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88804a2c4698 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800fa80950 (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: 4553 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: 0033:0x7f275b15a427 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:00007fff48c675d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f275b15a427 RDX: 00007fff48c676b3 RSI: 00007f275b1b5022 RDI: 00007fff48c676a0 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007fff48c67470 R10: 00007fff48c67327 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007fff48c676a0 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.2/4553 Modules linked in: CPU: 1 UID: 0 PID: 4553 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:ffff888049b6f9a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88801694d280 RCX: ffffffff815664c7 RDX: 0000000000000000 RSI: ffffffff815664d0 RDI: ffff88801694d67c RBP: ffff88801694d280 R08: 0000000000000000 R09: fffffbfff0ba6ff4 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801694d280 R13: 0000000000000001 R14: ffffffff85c0e500 R15: ffff88804a090ca0 FS: 000055557d0c4400(0000) GS:ffff8880e5442000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd76cf75004 CR3: 000000004915a000 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: 0033:0x7f275b15a427 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:00007fff48c675d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f275b15a427 RDX: 00007fff48c676b3 RSI: 00007f275b1b5022 RDI: 00007fff48c676a0 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007fff48c67470 R10: 00007fff48c67327 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007fff48c676a0 irq event stamp: 267 hardirqs last enabled at (267): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (266): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (262): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (260): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- audit: type=1400 audit(1768297959.507:19): avc: denied { write } for pid=4711 comm="syz-executor.0" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 audit: type=1400 audit(1768297960.241:20): avc: denied { module_load } for pid=4725 comm="syz-executor.1" path=2F6D656D66643A2F70726F632F7468726561642D73656C662F617474722F6673637265617465202864656C6574656429 dev="tmpfs" ino=1032 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:tmpfs_t:s0 tclass=system permissive=1 audit: type=1400 audit(1768297960.348:21): avc: denied { block_suspend } for pid=4749 comm="syz-executor.2" capability=36 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1 tmpfs: Bad value for 'mpol' tmpfs: Bad value for 'mpol' loop0: detected capacity change from 0 to 63 FAT-fs (loop0): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) netlink: 32 bytes leftover after parsing attributes in process `syz-executor.7'. Bluetooth: hci0: Opcode 0x0c1a failed: -4 Bluetooth: hci0: Error when powering off device on rfkill (-4) Bluetooth: hci2: Opcode 0x0c1a failed: -4 Bluetooth: hci2: Error when powering off device on rfkill (-4) Bluetooth: hci3: Opcode 0x0c1a failed: -4 Bluetooth: hci3: Error when powering off device on rfkill (-4) Bluetooth: hci4: Opcode 0x0c1a failed: -4 Bluetooth: hci4: Error when powering off device on rfkill (-4) Bluetooth: hci5: Opcode 0x0c1a failed: -4 Bluetooth: hci5: Error when powering off device on rfkill (-4) Bluetooth: hci6: Opcode 0x0c1a failed: -4 Bluetooth: hci6: Error when powering off device on rfkill (-4) Bluetooth: hci7: Opcode 0x0c1a failed: -4 Bluetooth: hci7: Error when powering off device on rfkill (-4) audit: type=1400 audit(1768297965.386:22): avc: denied { watch } for pid=5013 comm="syz-executor.3" path="/proc/5013/task" dev="proc" ino=9514 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=dir permissive=1 netlink: 20 bytes leftover after parsing attributes in process `syz-executor.2'. ieee80211 phy18: Selected rate control algorithm 'minstrel_ht' netlink: 20 bytes leftover after parsing attributes in process `syz-executor.2'. ieee80211 phy19: Selected rate control algorithm 'minstrel_ht' netlink: 12 bytes leftover after parsing attributes in process `syz-executor.0'. netlink: 12 bytes leftover after parsing attributes in process `syz-executor.0'. audit: type=1400 audit(1768297967.942:23): avc: denied { watch_reads } for pid=5230 comm="syz-executor.5" path="/syzkaller-testdir415788261/syzkaller.twYSOm/72/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 loop5: detected capacity change from 0 to 4 EXT4-fs: Quota format mount options ignored when QUOTA feature is enabled EXT4-fs (loop5): unsupported descriptor size 0 loop5: detected capacity change from 0 to 4 EXT4-fs: Quota format mount options ignored when QUOTA feature is enabled EXT4-fs (loop5): unsupported descriptor size 0