ext4 filesystem being mounted at /syzkaller-testdir202681155/syzkaller.U1Sx4h/60/file0 supports timestamps until 2038-01-19 (0x7fffffff) ===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260115 #1 Not tainted ------------------------------------- syz-executor.0/287 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.0/287: #0: ffff88800fa0c3f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88801c10b388 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800fa40950 (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: 287 Comm: syz-executor.0 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_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: 0033:0x7f2cf774dc27 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:00007ffdbc0cc228 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffdbc0cc2b0 RCX: 00007f2cf774dc27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007ffdbc0cc2b0 RBP: 00007ffdbc0cc28c R08: 0000000000000000 R09: 0000000000000004 R10: 00007ffdbc0cbfc6 R11: 0000000000000206 R12: 0000000000000032 R13: 000000000006fce4 R14: 0000000000000002 R15: 00007ffdbc0cc2f0 hpet: Lost 1 RTC interrupts ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.0/287 Modules linked in: CPU: 0 UID: 0 PID: 287 Comm: syz-executor.0 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:ffff88801ae3f9e0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88801b031b80 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff88801b031f7c RBP: ffff88801b031b80 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801b031b80 R13: 0000000000000001 R14: ffffffff85c0dd30 R15: ffff8880452a6bf0 FS: 000055556eb11400(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f09334c2710 CR3: 000000000e86c000 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: 0033:0x7f2cf774dc27 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:00007ffdbc0cc228 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffdbc0cc2b0 RCX: 00007f2cf774dc27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007ffdbc0cc2b0 RBP: 00007ffdbc0cc28c R08: 0000000000000000 R09: 0000000000000004 R10: 00007ffdbc0cbfc6 R11: 0000000000000206 R12: 0000000000000032 R13: 000000000006fce4 R14: 0000000000000002 R15: 00007ffdbc0cc2f0 irq event stamp: 529127 hardirqs last enabled at (529127): [] irqentry_exit+0x17b/0x650 hardirqs last disabled at (529125): [] handle_softirqs+0x65e/0x7d0 softirqs last enabled at (529126): [] __irq_exit_rcu+0xc4/0x100 softirqs last disabled at (529119): [] __irq_exit_rcu+0xc4/0x100 ---[ end trace 0000000000000000 ]--- EXT4-fs (loop5): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop6: detected capacity change from 0 to 4096 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 loop5: detected capacity change from 0 to 640 CPU: 1 UID: 0 PID: 5819 Comm: syz-executor.0 Tainted: G W 6.19.0-rc5-next-20260115 #1 PREEMPT(lazy) Tainted: [W]=WARN Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 Call Trace: dump_stack_lvl+0xfa/0x120 should_fail_ex+0x4d7/0x5e0 should_failslab+0xc2/0x120 kmem_cache_alloc_noprof+0x80/0x760 security_inode_alloc+0x3e/0x130 inode_init_always_gfp+0xc9d/0xff0 alloc_inode+0x8d/0x250 alloc_anon_inode+0x26/0x430 ioctx_alloc+0x47d/0x1e20 __x64_sys_io_setup+0xc8/0x1f0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f2cf774eb19 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007f2cf4cc4188 EFLAGS: 00000246 ORIG_RAX: 00000000000000ce RAX: ffffffffffffffda RBX: 00007f2cf7861f60 RCX: 00007f2cf774eb19 RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000800 RBP: 00007f2cf4cc41d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002 R13: 00007ffdbc0cbfdf R14: 00007f2cf4cc4300 R15: 0000000000022000 EXT4-fs warning (device loop6): read_mmp_block:110: Error -117 while reading MMP block 64 EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. ext4 filesystem being mounted at /syzkaller-testdir202681155/syzkaller.U1Sx4h/61/file0 supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs (loop5): re-mounted 00000000-0000-0000-0000-000000000000. EXT4-fs (loop5): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop6: detected capacity change from 0 to 4096 loop5: detected capacity change from 0 to 640 EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. EXT4-fs warning (device loop6): read_mmp_block:110: Error -117 while reading MMP block 64 ext4 filesystem being mounted at /syzkaller-testdir202681155/syzkaller.U1Sx4h/62/file0 supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs (loop5): re-mounted 00000000-0000-0000-0000-000000000000. EXT4-fs (loop5): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop6: detected capacity change from 0 to 4096 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 UID: 0 PID: 5859 Comm: syz-executor.0 Tainted: G W 6.19.0-rc5-next-20260115 #1 PREEMPT(lazy) Tainted: [W]=WARN Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 Call Trace: dump_stack_lvl+0xfa/0x120 should_fail_ex+0x4d7/0x5e0 should_failslab+0xc2/0x120 kmem_cache_alloc_lru_noprof+0x84/0x770 __d_alloc+0x34/0x9c0 d_alloc_pseudo+0x1d/0xc0 alloc_file_pseudo+0xbe/0x220 ioctx_alloc+0x57b/0x1e20 __x64_sys_io_setup+0xc8/0x1f0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f2cf774eb19 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007f2cf4cc4188 EFLAGS: 00000246 ORIG_RAX: 00000000000000ce RAX: ffffffffffffffda RBX: 00007f2cf7861f60 RCX: 00007f2cf774eb19 RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000800 RBP: 00007f2cf4cc41d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002 R13: 00007ffdbc0cbfdf R14: 00007f2cf4cc4300 R15: 0000000000022000 loop5: detected capacity change from 0 to 640 EXT4-fs (loop6): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs (loop6): re-mounted 00000000-0000-0000-0000-000000000000. EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. ext4 filesystem being mounted at /syzkaller-testdir202681155/syzkaller.U1Sx4h/63/file0 supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs (loop6): unmounting filesystem 00000000-0000-0000-0000-000000000000. EXT4-fs (loop5): re-mounted 00000000-0000-0000-0000-000000000000. EXT4-fs (loop5): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop6: detected capacity change from 0 to 4096 EXT4-fs warning (device loop6): read_mmp_block:110: Error -117 while reading MMP block 64 loop5: detected capacity change from 0 to 640 EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. ext4 filesystem being mounted at /syzkaller-testdir202681155/syzkaller.U1Sx4h/64/file0 supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs (loop5): re-mounted 00000000-0000-0000-0000-000000000000. EXT4-fs (loop5): unmounting filesystem 00000000-0000-0000-0000-000000000000.