===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260116 #1 Not tainted ------------------------------------- syz-executor.7/4867 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.7/4867: #0: ffff88800f8c43f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88804a1b7640 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800fa30950 (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: 4867 Comm: syz-executor.7 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: 0033:0x7fd106897427 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:00007fff6f840438 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fd106897427 RDX: ffffffffffffffbc RSI: 00007fd1068f200e RDI: 00007fd1068f11dd RBP: 0000000000000000 R08: 0000000000000000 R09: 00007fff6f83feb0 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007fff6f840500 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.7/4867 Modules linked in: CPU: 1 UID: 0 PID: 4867 Comm: syz-executor.7 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:ffff88801eadf9a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88804920d280 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff88804920d67c RBP: ffff88804920d280 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88804920d280 R13: 0000000000000001 R14: ffffffff85c0ef50 R15: ffff88804a189628 FS: 00005555555be400(0000) GS:ffff8880e5442000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055556ee96c98 CR3: 000000000e002000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 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: 0033:0x7fd106897427 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:00007fff6f840438 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fd106897427 RDX: ffffffffffffffbc RSI: 00007fd1068f200e RDI: 00007fd1068f11dd RBP: 0000000000000000 R08: 0000000000000000 R09: 00007fff6f83feb0 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007fff6f840500 irq event stamp: 669 hardirqs last enabled at (669): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (668): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (664): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (662): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- loop7: detected capacity change from 0 to 592 audit: type=1400 audit(1768576285.763:14): avc: denied { write } for pid=4918 comm="syz-executor.2" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 netlink: 4 bytes leftover after parsing attributes in process `syz-executor.6'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.6'. capability: warning: `syz-executor.2' uses deprecated v2 capabilities in a way that may be insecure 9pnet_fd: Insufficient options for proto=fd 9pnet_fd: Insufficient options for proto=fd mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium 9pnet_fd: Insufficient options for proto=fd loop6: detected capacity change from 0 to 4 9pnet_fd: Insufficient options for proto=fd EXT4-fs (loop6): feature flags set on rev 0 fs, running e2fsck is recommended EXT4-fs (loop6): bad geometry: block count 128 exceeds size of device (1 blocks) loop6: detected capacity change from 0 to 4 EXT4-fs (loop6): feature flags set on rev 0 fs, running e2fsck is recommended EXT4-fs (loop6): bad geometry: block count 128 exceeds size of device (1 blocks) 9pnet_fd: Insufficient options for proto=fd loop5: detected capacity change from 0 to 512 EXT4-fs error (device loop5): __ext4_fill_super:5560: inode #2: comm syz-executor.5: inode has both inline data and extents flags EXT4-fs (loop5): get root inode failed EXT4-fs (loop5): mount failed loop5: detected capacity change from 0 to 512 EXT4-fs error (device loop5): __ext4_fill_super:5560: inode #2: comm syz-executor.5: inode has both inline data and extents flags EXT4-fs (loop5): get root inode failed EXT4-fs (loop5): mount failed audit: type=1400 audit(1768576287.566:15): avc: denied { tracepoint } for pid=5164 comm="syz-executor.4" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 loop5: detected capacity change from 0 to 512 EXT4-fs error (device loop5): __ext4_fill_super:5560: inode #2: comm syz-executor.5: inode has both inline data and extents flags EXT4-fs (loop5): get root inode failed EXT4-fs (loop5): mount failed loop5: detected capacity change from 0 to 512 EXT4-fs error (device loop5): __ext4_fill_super:5560: inode #2: comm syz-executor.5: inode has both inline data and extents flags EXT4-fs (loop5): get root inode failed EXT4-fs (loop5): mount failed loop5: detected capacity change from 0 to 512 EXT4-fs error (device loop5): __ext4_fill_super:5560: inode #2: comm syz-executor.5: inode has both inline data and extents flags EXT4-fs (loop5): get root inode failed EXT4-fs (loop5): mount failed perf: interrupt took too long (2506 > 2500), lowering kernel.perf_event_max_sample_rate to 79000 perf: interrupt took too long (3229 > 3132), lowering kernel.perf_event_max_sample_rate to 61000 perf: interrupt took too long (5197 > 5162), lowering kernel.perf_event_max_sample_rate to 38000 EXT4-fs: EXT4-fs: inode_readahead_blks must be 0 or a power of 2 smaller than 2^31 EXT4-fs: EXT4-fs: inode_readahead_blks must be 0 or a power of 2 smaller than 2^31 perf: interrupt took too long (6525 > 6496), lowering kernel.perf_event_max_sample_rate to 30000 perf: interrupt took too long (8244 > 8156), lowering kernel.perf_event_max_sample_rate to 24000 perf: interrupt took too long (10329 > 10305), lowering kernel.perf_event_max_sample_rate to 19000 loop7: detected capacity change from 0 to 2048 EXT4-fs (loop7): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. EXT4-fs (loop7): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop7: detected capacity change from 0 to 2048 EXT4-fs (loop7): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. EXT4-fs (loop7): unmounting filesystem 00000000-0000-0000-0000-000000000000. audit: type=1400 audit(1768576289.913:16): avc: denied { read } for pid=5381 comm="syz-executor.5" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 EXT4-fs (loop7): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. EXT4-fs (loop7): unmounting filesystem 00000000-0000-0000-0000-000000000000. EXT4-fs (loop7): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. EXT4-fs (loop7): unmounting filesystem 00000000-0000-0000-0000-000000000000. No control pipe specified No control pipe specified random: crng reseeded on system resumption tmpfs: Unknown parameter './file1' random: crng reseeded on system resumption random: crng reseeded on system resumption random: crng reseeded on system resumption random: crng reseeded on system resumption random: crng reseeded on system resumption set_capacity_and_notify: 2 callbacks suppressed loop7: detected capacity change from 0 to 10 random: crng reseeded on system resumption random: crng reseeded on system resumption random: crng reseeded on system resumption loop7: detected capacity change from 0 to 10 loop7: detected capacity change from 0 to 10 random: crng reseeded on system resumption random: crng reseeded on system resumption random: crng reseeded on system resumption loop7: detected capacity change from 0 to 10 random: crng reseeded on system resumption random: crng reseeded on system resumption