===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260116 #1 Not tainted ------------------------------------- syz-executor.6/4112 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.6/4112: #0: ffff88800f03c3f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88801a425020 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f748950 (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: 4112 Comm: syz-executor.6 Not tainted 6.19.0-rc5-next-20260116 #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 filename_symlinkat+0x158/0x440 __x64_sys_symlink+0x82/0x110 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f9994d36427 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:00007ffdc3c097c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f9994d36427 RDX: ffffffffffffffbc RSI: 00007f9994d9100e RDI: 00007f9994d901dd RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffdc3c09240 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffdc3c09890 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.6/4112 Modules linked in: CPU: 1 UID: 0 PID: 4112 Comm: syz-executor.6 Not tainted 6.19.0-rc5-next-20260116 #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 d6 b7 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 4d 74 03 e8 2c 5d 56 00 e9 RSP: 0018:ffff888049edf9a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88804a575280 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff88804a57567c RBP: ffff88804a575280 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88804a575280 R13: 0000000000000001 R14: ffffffff85c0fd10 R15: ffff888042996bf0 FS: 000055556bac7400(0000) GS:ffff8880e5442000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055556bac7708 CR3: 00000000524bb000 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 filename_symlinkat+0x158/0x440 __x64_sys_symlink+0x82/0x110 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f9994d36427 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:00007ffdc3c097c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f9994d36427 RDX: ffffffffffffffbc RSI: 00007f9994d9100e RDI: 00007f9994d901dd RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffdc3c09240 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffdc3c09890 irq event stamp: 615 hardirqs last enabled at (615): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (614): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (610): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (608): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium loop4: detected capacity change from 0 to 16 EXT4-fs (loop4): couldn't mount as ext2 due to feature incompatibilities loop4: detected capacity change from 0 to 16 EXT4-fs (loop4): couldn't mount as ext2 due to feature incompatibilities mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium loop4: detected capacity change from 0 to 16 EXT4-fs (loop4): couldn't mount as ext2 due to feature incompatibilities loop4: detected capacity change from 0 to 16 EXT4-fs (loop4): couldn't mount as ext2 due to feature incompatibilities mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium loop4: detected capacity change from 0 to 16 EXT4-fs (loop4): couldn't mount as ext2 due to feature incompatibilities audit: type=1400 audit(1768572418.813:10): avc: denied { tracepoint } for pid=4278 comm="syz-executor.6" 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(1768572418.816:11): avc: denied { write } for pid=4278 comm="syz-executor.6" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium netlink: 4 bytes leftover after parsing attributes in process `syz-executor.4'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.4'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.4'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.4'. sr 1:0:0:0: [sr0] CDROM not ready. Make sure there is a disc in the drive. serio: Serial port ptm0 serio: Serial port ptm0 sr 1:0:0:0: [sr0] CDROM not ready. Make sure there is a disc in the drive. serio: Serial port ptm0 serio: Serial port ptm0 loop6: detected capacity change from 0 to 132 loop6: detected capacity change from 0 to 132 loop6: detected capacity change from 0 to 132 loop6: detected capacity change from 0 to 132 No source specified audit: type=1400 audit(1768572425.004:12): avc: denied { watch_reads } for pid=4657 comm="syz-executor.4" path="/syzkaller-testdir412431999/syzkaller.7QQZ6M/44/file0" dev="sda" ino=16034 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:unlabeled_t:s0 tclass=dir permissive=1 No source specified No source specified No source specified capability: warning: `syz-executor.5' uses deprecated v2 capabilities in a way that may be insecure