isofs_fill_super: bread failed, dev=loop3, iso_blknum=34, block=68 ===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260114 #1 Not tainted ------------------------------------- syz-executor.0/4684 is trying to release lock (rcu_read_lock) at: FAULT_INJECTION: forcing a failure. name fail_page_alloc, interval 1, probability 0, space 0, times 0 [] __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.0/4684: #0: ffff88800a7a83f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88801c3aa078 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800a7ac950 (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: 4684 Comm: syz-executor.0 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: 0033:0x7feeb1edb427 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:00007ffd4ac1bab8 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007feeb1edb427 RDX: 00007ffd4ac1bb97 RSI: 00007feeb1f36019 RDI: 00007ffd4ac1bb80 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffd4ac1b950 R10: 00007ffd4ac1b807 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffd4ac1bb80 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.0/4684 Modules linked in: CPU: 0 UID: 0 PID: 4684 Comm: syz-executor.0 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:ffff88804be8f9a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88801b3d9b80 RCX: ffffffff81565a27 RDX: 0000000000000000 RSI: ffffffff81565a30 RDI: ffff88801b3d9f7c RBP: ffff88801b3d9b80 R08: 0000000000000000 R09: fffffbfff0ba6ffc R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801b3d9b80 R13: 0000000000000001 R14: ffffffff85c0fcc0 R15: ffff88801c3a8ca0 FS: 000055557a4f6400(0000) GS:ffff8880e5343000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007feeb1f5b540 CR3: 0000000013f58000 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: 0033:0x7feeb1edb427 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:00007ffd4ac1bab8 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007feeb1edb427 RDX: 00007ffd4ac1bb97 RSI: 00007feeb1f36019 RDI: 00007ffd4ac1bb80 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffd4ac1b950 R10: 00007ffd4ac1b807 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffd4ac1bb80 irq event stamp: 367 hardirqs last enabled at (367): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (366): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (362): [] do_softirq+0x48/0x80 softirqs last disabled at (175): [] do_softirq+0x48/0x80 ---[ end trace 0000000000000000 ]--- CPU: 1 UID: 0 PID: 4685 Comm: syz-executor.1 Tainted: G W 6.19.0-rc5-next-20260114 #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_fail_alloc_page+0xe0/0x110 prepare_alloc_pages+0x1eb/0x550 __alloc_frozen_pages_noprof+0x186/0x25b0 alloc_pages_mpol+0xed/0x340 alloc_pages_noprof+0xa1/0x380 pte_alloc_one+0x1e/0x3f0 __pte_alloc+0x6c/0x3f0 __handle_mm_fault+0x246e/0x2fa0 handle_mm_fault+0x2d8/0x750 do_user_addr_fault+0x3cc/0x12b0 exc_page_fault+0xb0/0x180 asm_exc_page_fault+0x26/0x30 RIP: 0010:rep_movs_alternative+0x54/0x90 Code: 00 00 00 00 66 90 48 8b 06 48 89 07 48 83 c6 08 48 83 c7 08 83 e9 08 74 db 83 f9 08 73 e8 eb c5 eb 05 e9 0f 2e 04 00 48 8b 06 <48> 89 07 48 8d 47 08 48 83 e0 f8 48 29 f8 48 01 c7 48 01 c6 48 29 RSP: 0018:ffff88804b17fdf8 EFLAGS: 00050206 RAX: 000000000000011a RBX: 0000000000000070 RCX: 0000000000000070 RDX: ffffed100962ffdb RSI: ffff88804b17fe68 RDI: 0000000020000100 RBP: 0000000020000100 R08: 0000000000000000 R09: ffffed100962ffda R10: ffff88804b17fed7 R11: 0000000000000000 R12: ffff88804b17fe68 R13: 0000000020000170 R14: 00007ffffffff000 R15: 0000000000000000 _copy_to_user+0xbe/0xd0 __do_sys_sysinfo+0x82/0xe0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f503cd43b19 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:00007f503a2b9188 EFLAGS: 00000246 ORIG_RAX: 0000000000000063 RAX: ffffffffffffffda RBX: 00007f503ce56f60 RCX: 00007f503cd43b19 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000100 RBP: 00007f503a2b91d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffdd366995f R14: 00007f503a2b9300 R15: 0000000000022000 loop3: detected capacity change from 0 to 512 ext4: Unknown parameter 'AÔ0áõïå³û}€q…Œ˜þ\a¯ðâœ' loop3: detected capacity change from 0 to 512 ext4: Unknown parameter 'AÔ0áõïå³û}€q…Œ˜þ\a¯ðâœ' loop4: detected capacity change from 0 to 264192 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 random: crng reseeded on system resumption CPU: 0 UID: 0 PID: 4706 Comm: syz-executor.1 Tainted: G W 6.19.0-rc5-next-20260114 #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 ptlock_alloc+0x21/0x70 pte_alloc_one+0x86/0x3f0 __pte_alloc+0x6c/0x3f0 __handle_mm_fault+0x246e/0x2fa0 handle_mm_fault+0x2d8/0x750 do_user_addr_fault+0x3cc/0x12b0 exc_page_fault+0xb0/0x180 asm_exc_page_fault+0x26/0x30 RIP: 0010:rep_movs_alternative+0x54/0x90 Code: 00 00 00 00 66 90 48 8b 06 48 89 07 48 83 c6 08 48 83 c7 08 83 e9 08 74 db 83 f9 08 73 e8 eb c5 eb 05 e9 0f 2e 04 00 48 8b 06 <48> 89 07 48 8d 47 08 48 83 e0 f8 48 29 f8 48 01 c7 48 01 c6 48 29 RSP: 0018:ffff88804bc8fdf8 EFLAGS: 00050206 RAX: 000000000000011a RBX: 0000000000000070 RCX: 0000000000000070 RDX: ffffed1009791fdb RSI: ffff88804bc8fe68 RDI: 0000000020000100 RBP: 0000000020000100 R08: 0000000000000000 R09: ffffed1009791fda R10: ffff88804bc8fed7 R11: 0000000000000000 R12: ffff88804bc8fe68 R13: 0000000020000170 R14: 00007ffffffff000 R15: 0000000000000000 _copy_to_user+0xbe/0xd0 __do_sys_sysinfo+0x82/0xe0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f503cd43b19 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:00007f503a2b9188 EFLAGS: 00000246 ORIG_RAX: 0000000000000063 RAX: ffffffffffffffda RBX: 00007f503ce56f60 RCX: 00007f503cd43b19 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000100 RBP: 00007f503a2b91d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffdd366995f R14: 00007f503a2b9300 R15: 0000000000022000 loop4: detected capacity change from 0 to 264192 loop7: detected capacity change from 0 to 5408 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 00 00 add %al,(%rax) 4: 66 90 xchg %ax,%ax 6: 48 8b 06 mov (%rsi),%rax 9: 48 89 07 mov %rax,(%rdi) c: 48 83 c6 08 add $0x8,%rsi 10: 48 83 c7 08 add $0x8,%rdi 14: 83 e9 08 sub $0x8,%ecx 17: 74 db je 0xfffffff4 19: 83 f9 08 cmp $0x8,%ecx 1c: 73 e8 jae 0x6 1e: eb c5 jmp 0xffffffe5 20: eb 05 jmp 0x27 22: e9 0f 2e 04 00 jmpq 0x42e36 27: 48 8b 06 mov (%rsi),%rax * 2a: 48 89 07 mov %rax,(%rdi) <-- trapping instruction 2d: 48 8d 47 08 lea 0x8(%rdi),%rax 31: 48 83 e0 f8 and $0xfffffffffffffff8,%rax 35: 48 29 f8 sub %rdi,%rax 38: 48 01 c7 add %rax,%rdi 3b: 48 01 c6 add %rax,%rsi 3e: 48 rex.W 3f: 29 .byte 0x29