===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260116 #1 Not tainted ------------------------------------- syz-executor.6/4306 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.6/4306: #0: ffff88800fa303f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff8880336ce330 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800fa34950 (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: 4306 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: 0033:0x7f33390c7427 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:00007fff10c72718 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f33390c7427 RDX: 00007fff10c727f7 RSI: 00007f3339122019 RDI: 00007fff10c727e0 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007fff10c725b0 R10: 00007fff10c72467 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007fff10c727e0 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.6/4306 Modules linked in: CPU: 0 UID: 0 PID: 4306 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:ffff88801e8cf9a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff888017eed280 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff888017eed67c RBP: ffff888017eed280 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888017eed280 R13: 0000000000000001 R14: ffffffff85c110c0 R15: ffff88801be91628 FS: 0000555580055400(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3339147546 CR3: 000000000e15b000 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: 0033:0x7f33390c7427 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:00007fff10c72718 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f33390c7427 RDX: 00007fff10c727f7 RSI: 00007f3339122019 RDI: 00007fff10c727e0 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007fff10c725b0 R10: 00007fff10c72467 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007fff10c727e0 irq event stamp: 211 hardirqs last enabled at (211): [] irqentry_exit+0x17b/0x650 hardirqs last disabled at (209): [] handle_softirqs+0x65e/0x7d0 softirqs last enabled at (210): [] __irq_exit_rcu+0xc4/0x100 softirqs last disabled at (195): [] __irq_exit_rcu+0xc4/0x100 ---[ end trace 0000000000000000 ]--- loop7: detected capacity change from 0 to 64 audit: type=1326 audit(1768849466.221:16): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4306 comm="syz-executor.6" exe="/syz-executor.6" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f33390c7b19 code=0x10000 netlink: 2 bytes leftover after parsing attributes in process `syz-executor.0'. FAT-fs (loop5): utf8 is not a recommended IO charset for FAT filesystems, filesystem will be case sensitive! FAT-fs (loop5): unable to read boot sector loop5: detected capacity change from 0 to 128 SELinux: security_context_str_to_sid (root) failed with errno=-22 FAT-fs (loop5): utf8 is not a recommended IO charset for FAT filesystems, filesystem will be case sensitive! FAT-fs (loop5): unable to read boot sector loop5: detected capacity change from 0 to 128 ext4: Unknown parameter 'euid>00000000000000000000' ext4: Unknown parameter 'euid>00000000000000000000' netlink: 2 bytes leftover after parsing attributes in process `syz-executor.0'. FAT-fs (loop5): utf8 is not a recommended IO charset for FAT filesystems, filesystem will be case sensitive! FAT-fs (loop5): unable to read boot sector loop5: detected capacity change from 0 to 128 SELinux: security_context_str_to_sid (root) failed with errno=-22 loop4: detected capacity change from 0 to 64 vfat: Unknown parameter '18446744073709551615' 9p: Bad value for 'rfdno' loop5: detected capacity change from 0 to 64 loop3: detected capacity change from 0 to 264192 FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) netlink: 2 bytes leftover after parsing attributes in process `syz-executor.0'. netlink: 16 bytes leftover after parsing attributes in process `syz-executor.3'. tmpfs: Unknown parameter 'nl80211' 9p: Bad value for 'rfdno' loop3: detected capacity change from 0 to 264192 netlink: 16 bytes leftover after parsing attributes in process `syz-executor.3'. 9p: Bad value for 'rfdno' loop3: detected capacity change from 0 to 264192 netlink: 16 bytes leftover after parsing attributes in process `syz-executor.3'.