================================================================== BUG: KASAN: use-after-free in __lock_acquire+0x107/0x7c40 kernel/locking/lockdep.c:4933 Read of size 8 at addr ffff888054618bb0 by task gfs2_quotad/10566 CPU: 0 PID: 10566 Comm: gfs2_quotad Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026 Call Trace: dump_stack_lvl+0x188/0x24e lib/dump_stack.c:106 print_address_description mm/kasan/report.c:316 [inline] print_report+0xa8/0x210 mm/kasan/report.c:420 kasan_report+0x10b/0x140 mm/kasan/report.c:524 __lock_acquire+0x107/0x7c40 kernel/locking/lockdep.c:4933 lock_acquire+0x1bb/0x4a0 kernel/locking/lockdep.c:5676 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xb0/0x100 kernel/locking/spinlock.c:162 finish_wait+0xbb/0x1c0 kernel/sched/wait.c:410 gfs2_quotad+0x501/0x690 fs/gfs2/quota.c:1579 kthread+0x29d/0x330 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Allocated by task 10848: kasan_save_stack mm/kasan/common.c:46 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:53 ____kasan_kmalloc mm/kasan/common.c:375 [inline] __kasan_kmalloc+0x8e/0xa0 mm/kasan/common.c:384 kmalloc include/linux/slab.h:563 [inline] audit_log_d_path+0xc0/0x260 kernel/audit.c:2164 audit_log_d_path_exe+0x3e/0x70 kernel/audit.c:2235 audit_log_task+0x219/0x2e0 kernel/auditsc.c:2948 audit_seccomp+0x81/0x180 kernel/auditsc.c:2995 seccomp_log kernel/seccomp.c:994 [inline] __seccomp_filter+0x18dc/0x1bf0 kernel/seccomp.c:1310 syscall_trace_enter+0xa7/0x150 kernel/entry/common.c:72 do_syscall_64+0x24/0xa0 arch/x86/entry/common.c:72 entry_SYSCALL_64_after_hwframe+0x68/0xd2 Freed by task 10848: kasan_save_stack mm/kasan/common.c:46 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:53 kasan_save_free_info+0x27/0x40 mm/kasan/generic.c:516 ____kasan_slab_free+0x126/0x1f0 mm/kasan/common.c:237 kasan_slab_free include/linux/kasan.h:177 [inline] slab_free_hook mm/slub.c:1729 [inline] slab_free_freelist_hook+0x133/0x1b0 mm/slub.c:1755 slab_free mm/slub.c:3687 [inline] __kmem_cache_free+0xb6/0x200 mm/slub.c:3700 audit_log_d_path_exe+0x3e/0x70 kernel/audit.c:2235 audit_log_task+0x219/0x2e0 kernel/auditsc.c:2948 audit_seccomp+0x81/0x180 kernel/auditsc.c:2995 seccomp_log kernel/seccomp.c:994 [inline] __seccomp_filter+0x18dc/0x1bf0 kernel/seccomp.c:1310 syscall_trace_enter+0xa7/0x150 kernel/entry/common.c:72 do_syscall_64+0x24/0xa0 arch/x86/entry/common.c:72 entry_SYSCALL_64_after_hwframe+0x68/0xd2 The buggy address belongs to the object at ffff888054618000 which belongs to the cache kmalloc-8k of size 8192 The buggy address is located 2992 bytes inside of 8192-byte region [ffff888054618000, ffff88805461a000) The buggy address belongs to the physical page: page:ffffea0001518600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x54618 head:ffffea0001518600 order:3 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffffea000198cc00 dead000000000002 ffff888017442280 raw: 0000000000000000 0000000000020002 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 8191, tgid 8191 (kworker/u4:18), ts 575489668837, free_ts 567004423689 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x173/0x1a0 mm/page_alloc.c:2560 prep_new_page mm/page_alloc.c:2567 [inline] get_page_from_freelist+0x206b/0x2180 mm/page_alloc.c:4358 __alloc_pages+0x1ec/0x4f0 mm/page_alloc.c:5658 alloc_slab_page+0x5d/0x180 mm/slub.c:1799 allocate_slab mm/slub.c:1944 [inline] new_slab+0x87/0x2d0 mm/slub.c:1997 ___slab_alloc+0xbc5/0x1240 mm/slub.c:3154 __slab_alloc mm/slub.c:3240 [inline] slab_alloc_node mm/slub.c:3325 [inline] __kmem_cache_alloc_node+0x126/0x270 mm/slub.c:3398 __do_kmalloc_node mm/slab_common.c:935 [inline] __kmalloc+0xa3/0x240 mm/slab_common.c:949 kmalloc include/linux/slab.h:568 [inline] kzalloc include/linux/slab.h:699 [inline] __sta_info_alloc+0x88/0x25e0 net/mac80211/sta_info.c:536 ieee80211_ibss_add_sta+0x5fa/0x8d0 net/mac80211/ibss.c:632 ieee80211_update_sta_info net/mac80211/ibss.c:1027 [inline] ieee80211_rx_bss_info net/mac80211/ibss.c:1118 [inline] ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1609 [inline] ieee80211_ibss_rx_queued_mgmt+0x1559/0x2eb0 net/mac80211/ibss.c:1638 ieee80211_iface_process_skb net/mac80211/iface.c:1679 [inline] ieee80211_iface_work+0x72c/0xc70 net/mac80211/iface.c:1733 cfg80211_wiphy_work+0x224/0x260 net/wireless/core.c:433 process_one_work+0x8ab/0x1160 kernel/workqueue.c:2292 worker_thread+0xaf5/0x12a0 kernel/workqueue.c:2439 kthread+0x29d/0x330 kernel/kthread.c:376 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1487 [inline] free_pcp_prepare mm/page_alloc.c:1537 [inline] free_unref_page_prepare+0x8e5/0x9e0 mm/page_alloc.c:3414 free_unref_page+0x2e/0x3f0 mm/page_alloc.c:3509 qlink_free mm/kasan/quarantine.c:168 [inline] qlist_free_all+0x76/0xe0 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x144/0x160 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x1e/0x80 mm/kasan/common.c:306 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook+0x4b/0x490 mm/slab.h:737 slab_alloc_node mm/slub.c:3359 [inline] kmem_cache_alloc_node+0x1ad/0x310 mm/slub.c:3404 __alloc_skb+0xf9/0x7d0 net/core/skbuff.c:505 alloc_skb include/linux/skbuff.h:1303 [inline] netlink_alloc_large_skb net/netlink/af_netlink.c:1182 [inline] netlink_sendmsg+0x654/0xbd0 net/netlink/af_netlink.c:1852 sock_sendmsg_nosec net/socket.c:718 [inline] __sock_sendmsg net/socket.c:730 [inline] __sys_sendto+0x497/0x650 net/socket.c:2153 __do_sys_sendto net/socket.c:2165 [inline] __se_sys_sendto net/socket.c:2161 [inline] __x64_sys_sendto+0xda/0xf0 net/socket.c:2161 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 Memory state around the buggy address: ffff888054618a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888054618b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888054618b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888054618c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888054618c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================