===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260115 #1 Not tainted ------------------------------------- syz-executor.4/4324 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.4/4324: #0: ffff88800f8a63f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff888048a703e0 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f892950 (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: 4324 Comm: syz-executor.4 Not tainted 6.19.0-rc5-next-20260115 #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: 0033:0x7f76ec06c427 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:00007ffde8dd5b88 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f76ec06c427 RDX: 00007ffde8dd5c63 RSI: 00007f76ec0c702f RDI: 00007ffde8dd5c50 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffde8dd5a20 R10: 00007ffde8dd58d7 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffde8dd5c50 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.4/4324 Modules linked in: CPU: 0 UID: 0 PID: 4324 Comm: syz-executor.4 Not tainted 6.19.0-rc5-next-20260115 #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:ffff8880151079a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88801bb9b700 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff88801bb9bafc RBP: ffff88801bb9b700 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801bb9b700 R13: 0000000000000001 R14: ffffffff85c0fc70 R15: ffff888048a76bf0 FS: 000055558aabf400(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055558aabf708 CR3: 00000000496ac000 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: 0033:0x7f76ec06c427 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:00007ffde8dd5b88 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f76ec06c427 RDX: 00007ffde8dd5c63 RSI: 00007f76ec0c702f RDI: 00007ffde8dd5c50 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffde8dd5a20 R10: 00007ffde8dd58d7 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffde8dd5c50 irq event stamp: 459 hardirqs last enabled at (459): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (458): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (454): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (452): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- audit: type=1326 audit(1768469942.981:19): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4340 comm="syz-executor.5" exe="/syz-executor.5" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f8571517b19 code=0x0 audit: type=1326 audit(1768469943.815:20): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4340 comm="syz-executor.5" exe="/syz-executor.5" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f8571517b19 code=0x0 audit: type=1400 audit(1768469943.986:21): avc: denied { tracepoint } for pid=4362 comm="syz-executor.3" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 netlink: 20 bytes leftover after parsing attributes in process `syz-executor.1'. ieee80211 phy18: Selected rate control algorithm 'minstrel_ht' netlink: 20 bytes leftover after parsing attributes in process `syz-executor.1'. ieee80211 phy19: Selected rate control algorithm 'minstrel_ht' netlink: 20 bytes leftover after parsing attributes in process `syz-executor.1'. ieee80211 phy20: Selected rate control algorithm 'minstrel_ht' Direct I/O collision with buffered writes! File: syzkaller-testdir300844039/syzkaller.q5F7Eu/28/file0 Comm: syz-executor.5 netlink: 20 bytes leftover after parsing attributes in process `syz-executor.1'. ieee80211 phy21: Selected rate control algorithm 'minstrel_ht' audit: type=1400 audit(1768469950.440:22): avc: denied { read } for pid=4553 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 lo: entered promiscuous mode lo: left promiscuous mode audit: type=1326 audit(1768469951.397:23): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4603 comm="syz-executor.6" exe="/syz-executor.6" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f2903321b19 code=0x0 9pnet_fd: p9_fd_create_unix (4611): problem connecting socket: ./file0: -30 lo: entered promiscuous mode lo: left promiscuous mode audit: type=1326 audit(1768469952.232:24): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4603 comm="syz-executor.6" exe="/syz-executor.6" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f2903321b19 code=0x0 rfkill: input handler disabled rfkill: input handler enabled rfkill: input handler disabled rfkill: input handler enabled lo: entered promiscuous mode lo: left promiscuous mode rfkill: input handler disabled rfkill: input handler enabled lo: entered promiscuous mode lo: left promiscuous mode rfkill: input handler disabled rfkill: input handler enabled rfkill: input handler disabled rfkill: input handler enabled /dev/sr0: Can't open blockdev loop1: detected capacity change from 0 to 1 FAT-fs (loop1): bogus number of FAT sectors FAT-fs (loop1): Can't find a valid FAT filesystem loop1: detected capacity change from 0 to 1 FAT-fs (loop1): bogus number of FAT sectors FAT-fs (loop1): Can't find a valid FAT filesystem