================================================================== BUG: KASAN: use-after-free in __lock_acquire+0xf0/0x6544 kernel/locking/lockdep.c:4919 Read of size 8 at addr ffff0000d9354bb0 by task gfs2_quotad/5761 CPU: 0 PID: 5761 Comm: gfs2_quotad Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 Call trace: dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165 __dump_stack+0x30/0x40 lib/dump_stack.c:88 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106 print_address_description+0x88/0x218 mm/kasan/report.c:316 print_report+0x50/0x68 mm/kasan/report.c:420 kasan_report+0xa8/0x100 mm/kasan/report.c:524 __asan_report_load8_noabort+0x2c/0x38 mm/kasan/report_generic.c:351 __lock_acquire+0xf0/0x6544 kernel/locking/lockdep.c:4919 lock_acquire+0x20c/0x644 kernel/locking/lockdep.c:5662 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x6c/0xb4 kernel/locking/spinlock.c:162 finish_wait+0xc8/0x1ac kernel/sched/wait.c:410 gfs2_quotad+0x390/0x4fc fs/gfs2/quota.c:1579 kthread+0x250/0x2d8 kernel/kthread.c:376 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:850 Allocated by task 6222: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4c/0x80 mm/kasan/common.c:52 kasan_save_alloc_info+0x28/0x34 mm/kasan/generic.c:505 ____kasan_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0xa0/0xb8 mm/kasan/common.c:383 kasan_kmalloc include/linux/kasan.h:211 [inline] kmalloc_trace+0x7c/0x94 mm/slab_common.c:1031 kmalloc include/linux/slab.h:563 [inline] kzalloc include/linux/slab.h:699 [inline] tomoyo_print_bprm security/tomoyo/audit.c:26 [inline] tomoyo_init_log+0xe48/0x1af8 security/tomoyo/audit.c:264 tomoyo_supervisor+0x2e0/0xee4 security/tomoyo/common.c:2088 tomoyo_audit_env_log security/tomoyo/environ.c:36 [inline] tomoyo_env_perm+0x138/0x1dc security/tomoyo/environ.c:63 tomoyo_environ security/tomoyo/domain.c:672 [inline] tomoyo_find_next_domain+0x1178/0x15fc security/tomoyo/domain.c:882 tomoyo_bprm_check_security+0xdc/0x130 security/tomoyo/tomoyo.c:101 security_bprm_check+0x6c/0xa8 security/security.c:869 search_binary_handler fs/exec.c:1752 [inline] exec_binprm fs/exec.c:1805 [inline] bprm_execve+0x764/0x154c fs/exec.c:1874 do_execveat_common+0x648/0x7dc fs/exec.c:1979 do_execve fs/exec.c:2053 [inline] __do_sys_execve fs/exec.c:2129 [inline] __se_sys_execve fs/exec.c:2124 [inline] __arm64_sys_execve+0x98/0xb0 fs/exec.c:2124 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 The buggy address belongs to the object at ffff0000d9354000 which belongs to the cache kmalloc-8k of size 8192 The buggy address is located 2992 bytes inside of 8192-byte region [ffff0000d9354000, ffff0000d9356000) The buggy address belongs to the physical page: page:00000000e0cb2f62 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff0000d9350000 pfn:0x119350 head:00000000e0cb2f62 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000010200 0000000000000000 dead000000000001 ffff0000c0002c00 raw: ffff0000d9350000 0000000080020000 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000d9354a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff0000d9354b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff0000d9354b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff0000d9354c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff0000d9354c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== INFO: trying to register non-static key. The code is fine but needs lockdep annotation, or maybe you didn't initialize this object before use? turning off the locking correctness validator. CPU: 0 PID: 5761 Comm: gfs2_quotad Tainted: G B syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 Call trace: dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165 __dump_stack+0x30/0x40 lib/dump_stack.c:88 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106 dump_stack+0x1c/0x5c lib/dump_stack.c:113 assign_lock_key+0x224/0x258 kernel/locking/lockdep.c:974 register_lock_class+0x1ac/0x694 kernel/locking/lockdep.c:1287 __lock_acquire+0x150/0x6544 kernel/locking/lockdep.c:4928 lock_acquire+0x20c/0x644 kernel/locking/lockdep.c:5662 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x6c/0xb4 kernel/locking/spinlock.c:162 finish_wait+0xc8/0x1ac kernel/sched/wait.c:410 gfs2_quotad+0x390/0x4fc fs/gfs2/quota.c:1579 kthread+0x250/0x2d8 kernel/kthread.c:376 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:850 list_del corruption. prev->next should be ffff800021927d98, but was 0000000000000000. (prev=ffff0000d9354bd8) ------------[ cut here ]------------ kernel BUG at lib/list_debug.c:61! Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 5761 Comm: gfs2_quotad Tainted: G B syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 pstate: 624000c5 (nZCv daIF +PAN -UAO +TCO -DIT -SSBS BTYPE=--) pc : __list_del_entry_valid+0x13c/0x158 lib/list_debug.c:59 lr : __list_del_entry_valid+0x13c/0x158 lib/list_debug.c:59 sp : ffff800021927c70 x29: ffff800021927c70 x28: 0000000000000000 x27: 0000000000000bb8 x26: 0000000000001770 x25: dfff800000000000 x24: dfff800000000000 x23: ffff0000d93547c0 x22: dfff800000000000 x21: ffff0000d9354bd8 x20: ffff0000d9354bd8 x19: ffff800021927d98 x18: ffff800011abbcc0 x17: 20747562202c3839 x16: ffff8000082e7df4 x15: 0000000000000000 x14: 00000000ffffffff x13: 0000000000000001 x12: 0000000000ff0100 x11: ff0080000830a298 x10: 0000000000000000 x9 : d3664c73ac7ba100 x8 : d3664c73ac7ba100 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff800021927738 x4 : ffff8000151a4920 x3 : ffff80000852e428 x2 : 0000000000000001 x1 : 0000000100000001 x0 : 000000000000006d Call trace: __list_del_entry_valid+0x13c/0x158 lib/list_debug.c:59 __list_del_entry include/linux/list.h:134 [inline] list_del_init include/linux/list.h:206 [inline] finish_wait+0xd4/0x1ac kernel/sched/wait.c:411 gfs2_quotad+0x390/0x4fc fs/gfs2/quota.c:1579 kthread+0x250/0x2d8 kernel/kthread.c:376 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:850 Code: 91338000 aa1303e1 aa1503e3 95bfba8d (d4210000) ---[ end trace 0000000000000000 ]---