syz-executor.0 (4175) used greatest stack depth: 22904 bytes left ===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260116 #1 Not tainted ------------------------------------- syz-executor.4/284 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.4/284: #0: ffff88800fb083f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88801aa72078 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800fb0c950 (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: 284 Comm: syz-executor.4 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_mkdir+0x331/0xb30 vfs_mkdir+0x6d8/0xc00 filename_mkdirat+0x118/0x430 __x64_sys_mkdir+0x6e/0xd0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc310944c27 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 53 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:00007ffd8c65a3e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffd8c65a470 RCX: 00007fc310944c27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007ffd8c65a470 RBP: 00007ffd8c65a44c R08: 0000000000000000 R09: 0000000000000003 R10: 00007ffd8c65a187 R11: 0000000000000206 R12: 0000000000000032 R13: 000000000002b4dc R14: 000000000000000f R15: 00007ffd8c65a4b0 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.4/284 Modules linked in: CPU: 0 UID: 0 PID: 284 Comm: syz-executor.4 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:ffff888015c4f9e0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff8880163f8000 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff8880163f83fc RBP: ffff8880163f8000 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff8880163f8000 R13: 0000000000000001 R14: ffffffff85c11160 R15: ffff88801aa31628 FS: 000055557098d400(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555556e7ec58 CR3: 000000000d30e000 CR4: 0000000000350ef0 Call Trace: __wait_on_freeing_inode+0x10f/0x350 insert_inode_locked+0x25f/0x890 __ext4_new_inode+0x223d/0x4cd0 ext4_mkdir+0x331/0xb30 vfs_mkdir+0x6d8/0xc00 filename_mkdirat+0x118/0x430 __x64_sys_mkdir+0x6e/0xd0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc310944c27 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 53 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:00007ffd8c65a3e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffd8c65a470 RCX: 00007fc310944c27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007ffd8c65a470 RBP: 00007ffd8c65a44c R08: 0000000000000000 R09: 0000000000000003 R10: 00007ffd8c65a187 R11: 0000000000000206 R12: 0000000000000032 R13: 000000000002b4dc R14: 000000000000000f R15: 00007ffd8c65a4b0 irq event stamp: 189449 hardirqs last enabled at (189449): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (189448): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (189442): [] do_softirq+0x48/0x80 softirqs last disabled at (189237): [] do_softirq+0x48/0x80 ---[ end trace 0000000000000000 ]--- loop2: detected capacity change from 0 to 512 EXT4-fs error (device loop2): __ext4_fill_super:5560: inode #2: comm syz-executor.2: iget: bogus i_mode (0) EXT4-fs (loop2): get root inode failed EXT4-fs (loop2): mount failed loop2: detected capacity change from 0 to 512 EXT4-fs error (device loop2): __ext4_fill_super:5560: inode #2: comm syz-executor.2: iget: bogus i_mode (0) EXT4-fs (loop2): get root inode failed EXT4-fs (loop2): mount failed sr 1:0:0:0: [sr0] tag#0 unaligned transfer blk_print_req_error: 7 callbacks suppressed I/O error, dev sr0, sector 0 op 0x0:(READ) flags 0x800000 phys_seg 1 prio class 2 audit: type=1400 audit(1768676466.185:11): avc: denied { tracepoint } for pid=4263 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 audit: type=1400 audit(1768676466.213:12): avc: denied { write } for pid=4265 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 program syz-executor.4 is using a deprecated SCSI ioctl, please convert it to SG_IO UDPLite6: UDP-Lite is deprecated and scheduled to be removed in 2025, please contact the netdev mailing list SELinux: unrecognized netlink message: protocol=0 nlmsg_type=273 sclass=netlink_route_socket pid=4294 comm=syz-executor.7 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=273 sclass=netlink_route_socket pid=4294 comm=syz-executor.7 loop0: detected capacity change from 0 to 2048 EXT4-fs (loop0): can't mount with journal_async_commit, fs mounted w/o journal faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2 faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2 syz-executor.1 (4309) used greatest stack depth: 22448 bytes left