EXT4-fs (loop7): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. ext4 filesystem being mounted at /syzkaller-testdir968220993/syzkaller.0oy2Cf/3/file0 supports timestamps until 2038-01-19 (0x7fffffff) ===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260114 #1 Not tainted ------------------------------------- syz-executor.3/289 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.3/289: #0: ffff888009e1c3f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88801ae04698 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f108950 (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: 289 Comm: syz-executor.3 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_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: 0033:0x7f0e60c59c27 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:00007fffa3557348 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007fffa35573d0 RCX: 00007f0e60c59c27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007fffa35573d0 RBP: 00007fffa35573ac R08: 0000000000000000 R09: 0000000000000003 R10: 00007fffa35570e7 R11: 0000000000000206 R12: 0000000000000032 R13: 000000000002a0b1 R14: 000000000000000b R15: 00007fffa3557410 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.3/289 Modules linked in: CPU: 0 UID: 0 PID: 289 Comm: syz-executor.3 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:ffff88801ab279e0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff8880167b1b80 RCX: ffffffff81565a27 RDX: 0000000000000000 RSI: ffffffff81565a30 RDI: ffff8880167b1f7c RBP: ffff8880167b1b80 R08: 0000000000000000 R09: fffffbfff0ba6ffc R10: 0000000000000000 R11: 0000000000000001 R12: ffff8880167b1b80 R13: 0000000000000001 R14: ffffffff85c10e90 R15: ffff88801ae07578 FS: 00005555736ad400(0000) GS:ffff8880e5343000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fffa3555fe8 CR3: 000000000c8b5000 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: 0033:0x7f0e60c59c27 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:00007fffa3557348 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007fffa35573d0 RCX: 00007f0e60c59c27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007fffa35573d0 RBP: 00007fffa35573ac R08: 0000000000000000 R09: 0000000000000003 R10: 00007fffa35570e7 R11: 0000000000000206 R12: 0000000000000032 R13: 000000000002a0b1 R14: 000000000000000b R15: 00007fffa3557410 irq event stamp: 206009 hardirqs last enabled at (206009): [] irqentry_exit+0x17b/0x650 hardirqs last disabled at (206007): [] handle_softirqs+0x65e/0x7d0 softirqs last enabled at (206008): [] __irq_exit_rcu+0xc4/0x100 softirqs last disabled at (205999): [] __irq_exit_rcu+0xc4/0x100 ---[ end trace 0000000000000000 ]--- EXT4-fs (loop7): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop7: detected capacity change from 0 to 640 EXT4-fs (loop7): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. ext4 filesystem being mounted at /syzkaller-testdir968220993/syzkaller.0oy2Cf/4/file0 supports timestamps until 2038-01-19 (0x7fffffff) loop6: detected capacity change from 0 to 2048 EXT4-fs error (device loop6): __ext4_fill_super:5560: inode #2: comm syz-executor.6: iget: special inode unallocated EXT4-fs (loop6): get root inode failed EXT4-fs (loop6): mount failed loop3: detected capacity change from 0 to 2048 ext4: Unknown parameter '還 ' loop3: detected capacity change from 0 to 2048 ext4: Unknown parameter '還 ' EXT4-fs (loop7): unmounting filesystem 00000000-0000-0000-0000-000000000000. audit: type=1400 audit(1768442834.820:12): avc: denied { block_suspend } for pid=4192 comm="syz-executor.3" capability=36 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1 FAT-fs (loop4): unable to read boot sector FAT-fs (loop4): unable to read boot sector