===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260113 #1 Not tainted ------------------------------------- syz-executor.7/286 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.7/286: #0: ffff88800fb4c3f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88801b9f7640 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800fb58950 (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: 286 Comm: syz-executor.7 Not tainted 6.19.0-rc5-next-20260113 #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 do_mkdirat+0x11a/0x440 __x64_sys_mkdir+0x65/0x80 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f7c20b29c27 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:00007ffe5fc7ac28 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffe5fc7acb0 RCX: 00007f7c20b29c27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007ffe5fc7acb0 RBP: 00007ffe5fc7ac8c R08: 0000000000000000 R09: 0000000000000003 R10: 00007ffe5fc7a9c7 R11: 0000000000000206 R12: 0000000000000032 R13: 000000000001e6e8 R14: 0000000000000002 R15: 00007ffe5fc7acf0 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.7/286 Modules linked in: CPU: 0 UID: 0 PID: 286 Comm: syz-executor.7 Not tainted 6.19.0-rc5-next-20260113 #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 a6 bb de ff 4d 85 f6 0f 84 73 fe ff ff e8 38 89 20 00 fb e9 68 fe ff ff 90 <0f> 0b 90 5b 5d 41 5c 41 5d 41 5e e9 61 f9 73 03 e8 0c 88 56 00 e9 RSP: 0018:ffff88801b0af9e0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88801587b700 RCX: ffffffff815664c7 RDX: 0000000000000000 RSI: ffffffff815664d0 RDI: ffff88801587bafc RBP: ffff88801587b700 R08: 0000000000000000 R09: fffffbfff0ba6ff4 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801587b700 R13: 0000000000000001 R14: ffffffff85c0e730 R15: ffff88804cd40ca0 FS: 0000555576797400(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005555767a0c58 CR3: 000000000bc48000 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 do_mkdirat+0x11a/0x440 __x64_sys_mkdir+0x65/0x80 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f7c20b29c27 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:00007ffe5fc7ac28 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffe5fc7acb0 RCX: 00007f7c20b29c27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007ffe5fc7acb0 RBP: 00007ffe5fc7ac8c R08: 0000000000000000 R09: 0000000000000003 R10: 00007ffe5fc7a9c7 R11: 0000000000000206 R12: 0000000000000032 R13: 000000000001e6e8 R14: 0000000000000002 R15: 00007ffe5fc7acf0 irq event stamp: 151871 hardirqs last enabled at (151871): [] irqentry_exit+0x17b/0x650 hardirqs last disabled at (151870): [] sysvec_apic_timer_interrupt+0xf/0x80 softirqs last enabled at (151864): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (151862): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- audit: type=1400 audit(1768295989.380:10): avc: denied { watch_reads } for pid=4022 comm="syz-executor.0" path="/syzkaller-testdir431267806/syzkaller.syZe6K/8/file0" dev="hugetlbfs" ino=4920 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:hugetlbfs_t:s0 tclass=dir permissive=1 loop2: detected capacity change from 0 to 512 EXT4-fs (loop2): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. netlink: 12 bytes leftover after parsing attributes in process `syz-executor.0'. netlink: 12 bytes leftover after parsing attributes in process `syz-executor.0'. UDPLite6: UDP-Lite is deprecated and scheduled to be removed in 2025, please contact the netdev mailing list EXT4-fs (loop2): unmounting filesystem 00000000-0000-0000-0000-000000000000. netlink: 12 bytes leftover after parsing attributes in process `syz-executor.0'. syz-executor.6 (4195) used greatest stack depth: 24176 bytes left netlink: 12 bytes leftover after parsing attributes in process `syz-executor.0'. loop2: detected capacity change from 0 to 512 audit: type=1400 audit(1768295994.899:11): avc: denied { watch_reads } for pid=4215 comm="syz-executor.4" path="/syzkaller-testdir923550889/syzkaller.ZjdUfb/13" dev="sda" ino=15974 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:unlabeled_t:s0 tclass=dir permissive=1 audit: type=1400 audit(1768295994.907:12): avc: denied { watch_reads } for pid=4215 comm="syz-executor.4" path="/syzkaller-testdir923550889/syzkaller.ZjdUfb/13/file1" dev="sda" ino=16009 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:unlabeled_t:s0 tclass=file permissive=1 EXT4-fs (loop2): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. netlink: 12 bytes leftover after parsing attributes in process `syz-executor.0'. EXT4-fs (loop2): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop2: detected capacity change from 0 to 512 EXT4-fs (loop2): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. EXT4-fs (loop2): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop2: detected capacity change from 0 to 512 EXT4-fs (loop2): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. EXT4-fs (loop2): unmounting filesystem 00000000-0000-0000-0000-000000000000. syz-executor.2 (4344) used greatest stack depth: 23664 bytes left