===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260114 #1 Not tainted ------------------------------------- syz-executor.4/3930 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.4/3930: #0: ffff88800f5303f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff888049cd2078 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f534950 (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: 3930 Comm: syz-executor.4 Not tainted 6.19.0-rc5-next-20260114 #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 do_symlinkat+0x153/0x440 __x64_sys_symlink+0x79/0xa0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fb82802a427 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:00007fff84c03b48 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fb82802a427 RDX: ffffffffffffffbc RSI: 00007fb82808500e RDI: 00007fb8280841dd RBP: 0000000000000000 R08: 0000000000000000 R09: 00007fff84c035c0 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007fff84c03c10 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.4/3930 Modules linked in: CPU: 1 UID: 0 PID: 3930 Comm: syz-executor.4 Not tainted 6.19.0-rc5-next-20260114 #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 16 c0 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 24 74 03 e8 bc 5c 56 00 e9 RSP: 0018:ffff88804aab79a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff888048590000 RCX: ffffffff81565a27 RDX: 0000000000000000 RSI: ffffffff81565a30 RDI: ffff8880485903fc RBP: ffff888048590000 R08: 0000000000000000 R09: fffffbfff0ba6ffc R10: 0000000000000000 R11: 0000000000000001 R12: ffff888048590000 R13: 0000000000000001 R14: ffffffff85c0f860 R15: ffff888049cce268 FS: 0000555591939400(0000) GS:ffff8880e5443000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f15cddc3004 CR3: 000000000aac9000 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 do_symlinkat+0x153/0x440 __x64_sys_symlink+0x79/0xa0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fb82802a427 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:00007fff84c03b48 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fb82802a427 RDX: ffffffffffffffbc RSI: 00007fb82808500e RDI: 00007fb8280841dd RBP: 0000000000000000 R08: 0000000000000000 R09: 00007fff84c035c0 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007fff84c03c10 irq event stamp: 793 hardirqs last enabled at (793): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (792): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (788): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (786): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- capability: warning: `syz-executor.7' uses 32-bit capabilities (legacy support in use) loop5: detected capacity change from 0 to 8 FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop5): FAT read failed (blocknr 32) loop5: detected capacity change from 0 to 8 FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop5): FAT read failed (blocknr 32) loop5: detected capacity change from 0 to 8 audit: type=1326 audit(1768384798.703:10): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4047 comm="syz-executor.1" exe="/syz-executor.1" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f15cd8abb19 code=0x0 FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop5): FAT read failed (blocknr 32) loop5: detected capacity change from 0 to 8 FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop5): FAT read failed (blocknr 32) loop1: detected capacity change from 0 to 4 EXT4-fs (loop1): bad geometry: block count 256 exceeds size of device (2 blocks) loop1: detected capacity change from 0 to 4 EXT4-fs (loop1): bad geometry: block count 256 exceeds size of device (2 blocks) ======================================================= WARNING: The mand mount option has been deprecated and and is ignored by this kernel. Remove the mand option from the mount to silence this warning. ======================================================= netlink: 8 bytes leftover after parsing attributes in process `syz-executor.7'. audit: type=1326 audit(1768384799.907:11): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4227 comm="syz-executor.7" exe="/syz-executor.7" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f1892135b19 code=0x0 audit: type=1107 audit(1768384799.917:12): pid=4228 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 msg='©' audit: type=1326 audit(1768384801.125:13): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4304 comm="syz-executor.6" exe="/syz-executor.6" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fe4ab468b19 code=0x0 tmpfs: Bad value for 'nr_blocks' tmpfs: Bad value for 'nr_blocks' audit: type=1400 audit(1768384801.502:14): avc: denied { write } for pid=4359 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(1768384803.516:15): avc: denied { watch_reads } for pid=4445 comm="syz-executor.2" path="/syzkaller-testdir094882587/syzkaller.4Dusz6/27" dev="sda" ino=15985 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:unlabeled_t:s0 tclass=dir permissive=1 UDPLite6: UDP-Lite is deprecated and scheduled to be removed in 2025, please contact the netdev mailing list syz-executor.0 (4519) used greatest stack depth: 23728 bytes left loop7: detected capacity change from 0 to 512 EXT4-fs (loop7): warning: mounting unchecked fs, running e2fsck is recommended EXT4-fs (loop7): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs (loop7): unmounting filesystem 00000000-0000-0000-0000-000000000000. audit: type=1400 audit(1768384806.301:16): avc: denied { watch_reads } for pid=4546 comm="syz-executor.7" path="/syzkaller-testdir739197140/syzkaller.65fDiH/41/file0" dev="hugetlbfs" ino=6663 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:hugetlbfs_t:s0 tclass=dir permissive=1