================================================================== BUG: KASAN: use-after-free in __wake_up_common+0x255/0x4e0 Read of size 8 at addr ffff88807e973230 by task syz-executor.5/26827 CPU: 0 PID: 26827 Comm: syz-executor.5 Tainted: G W 5.17.0-syzkaller-09727-g34af78c4e616 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1dc/0x2d8 lib/dump_stack.c:106 print_address_description+0x64/0x400 mm/kasan/report.c:247 __kasan_report mm/kasan/report.c:434 [inline] kasan_report+0x19a/0x1f0 mm/kasan/report.c:451 __wake_up_common+0x255/0x4e0 __wake_up_common_lock kernel/sched/wait.c:137 [inline] __wake_up+0x115/0x1c0 kernel/sched/wait.c:156 tty_release+0x4a9/0xef0 drivers/tty/tty_io.c:1781 __fput+0x3fc/0x870 fs/file_table.c:317 task_work_run+0x146/0x1c0 kernel/task_work.c:164 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop kernel/entry/common.c:190 [inline] exit_to_user_mode_prepare+0x1dd/0x200 kernel/entry/common.c:222 __syscall_exit_to_user_mode_work kernel/entry/common.c:304 [inline] syscall_exit_to_user_mode+0x2e/0x70 kernel/entry/common.c:315 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fea22e3bc8b Code: 0f 05 48 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24 0c e8 63 fc ff ff 8b 7c 24 0c 41 89 c0 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 44 89 c7 89 44 24 0c e8 a1 fc ff ff 8b 44 RSP: 002b:00007ffe93c68510 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 00007fea22e3bc8b RDX: 00007fea22fa0958 RSI: ffffffffffffffff RDI: 0000000000000004 RBP: 00007fea22f9d960 R08: 0000000000000000 R09: 00007fea22fa0960 R10: 00007ffe93c68610 R11: 0000000000000293 R12: 000000000015bbeb R13: 00007ffe93c68610 R14: 00007fea22f9bf60 R15: 0000000000000032 Allocated by task 26825: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:436 [inline] ____kasan_kmalloc+0xdc/0x110 mm/kasan/common.c:515 kasan_kmalloc include/linux/kasan.h:249 [inline] kmem_cache_alloc_trace+0x9d/0x330 mm/slub.c:3258 kmalloc include/linux/slab.h:581 [inline] io_arm_poll_handler+0x3bd/0x710 fs/io_uring.c:6248 io_queue_sqe_arm_apoll fs/io_uring.c:7499 [inline] __io_queue_sqe+0x23d/0x10b0 fs/io_uring.c:7541 io_queue_sqe fs/io_uring.c:7568 [inline] io_submit_sqe fs/io_uring.c:7776 [inline] io_submit_sqes+0x1265/0xb040 fs/io_uring.c:7882 __do_sys_io_uring_enter fs/io_uring.c:10924 [inline] __se_sys_io_uring_enter+0x31f/0x2f50 fs/io_uring.c:10850 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae Freed by task 55: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x4c/0x70 mm/kasan/common.c:45 kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:370 ____kasan_slab_free+0x136/0x1e0 mm/kasan/common.c:366 kasan_slab_free include/linux/kasan.h:215 [inline] slab_free_hook mm/slub.c:1728 [inline] slab_free_freelist_hook+0x12e/0x1a0 mm/slub.c:1754 slab_free mm/slub.c:3510 [inline] kfree+0xc6/0x390 mm/slub.c:4552 io_flush_apoll_cache fs/io_uring.c:10038 [inline] io_ring_ctx_free+0x491/0xffe fs/io_uring.c:10064 io_ring_exit_work+0x64d/0x6c5 fs/io_uring.c:10244 process_one_work+0x83c/0x11a0 kernel/workqueue.c:2289 worker_thread+0xa6c/0x1290 kernel/workqueue.c:2436 kthread+0x2a3/0x2d0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 Last potentially related work creation: kasan_save_stack+0x3b/0x60 mm/kasan/common.c:38 __kasan_record_aux_stack+0xb2/0xc0 mm/kasan/generic.c:348 kvfree_call_rcu+0x119/0x880 kernel/rcu/tree.c:3595 cfg80211_update_known_bss+0x174/0x9a0 cfg80211_bss_update+0x17a/0x2170 net/wireless/scan.c:1715 cfg80211_inform_single_bss_frame_data net/wireless/scan.c:2471 [inline] cfg80211_inform_bss_frame_data+0x9e2/0x2190 net/wireless/scan.c:2504 ieee80211_bss_info_update+0x75b/0xbe0 net/mac80211/scan.c:190 ieee80211_rx_bss_info net/mac80211/ibss.c:1119 [inline] ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1610 [inline] ieee80211_ibss_rx_queued_mgmt+0x1690/0x2b30 net/mac80211/ibss.c:1639 ieee80211_iface_process_skb net/mac80211/iface.c:1527 [inline] ieee80211_iface_work+0x713/0xca0 net/mac80211/iface.c:1581 process_one_work+0x83c/0x11a0 kernel/workqueue.c:2289 worker_thread+0xa6c/0x1290 kernel/workqueue.c:2436 kthread+0x2a3/0x2d0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 Second to last potentially related work creation: kasan_save_stack+0x3b/0x60 mm/kasan/common.c:38 __kasan_record_aux_stack+0xb2/0xc0 mm/kasan/generic.c:348 kvfree_call_rcu+0x119/0x880 kernel/rcu/tree.c:3595 cfg80211_update_known_bss+0x174/0x9a0 cfg80211_bss_update+0x17a/0x2170 net/wireless/scan.c:1715 cfg80211_inform_single_bss_frame_data net/wireless/scan.c:2471 [inline] cfg80211_inform_bss_frame_data+0x9e2/0x2190 net/wireless/scan.c:2504 ieee80211_bss_info_update+0x75b/0xbe0 net/mac80211/scan.c:190 ieee80211_rx_bss_info net/mac80211/ibss.c:1119 [inline] ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1610 [inline] ieee80211_ibss_rx_queued_mgmt+0x1690/0x2b30 net/mac80211/ibss.c:1639 ieee80211_iface_process_skb net/mac80211/iface.c:1527 [inline] ieee80211_iface_work+0x713/0xca0 net/mac80211/iface.c:1581 process_one_work+0x83c/0x11a0 kernel/workqueue.c:2289 worker_thread+0xa6c/0x1290 kernel/workqueue.c:2436 kthread+0x2a3/0x2d0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 The buggy address belongs to the object at ffff88807e973200 which belongs to the cache kmalloc-96 of size 96 The buggy address is located 48 bytes inside of 96-byte region [ffff88807e973200, ffff88807e973260) The buggy address belongs to the page: page:ffffea0001fa5cc0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7e973 flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 ffffea00008ce840 dead000000000003 ffff888011441780 raw: 0000000000000000 0000000000200020 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x112a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_HARDWALL), pid 2440, ts 107039043049, free_ts 106982126834 prep_new_page mm/page_alloc.c:2382 [inline] get_page_from_freelist+0x708/0xa80 mm/page_alloc.c:4123 __alloc_pages+0x255/0x580 mm/page_alloc.c:5349 alloc_slab_page+0x70/0xf0 mm/slub.c:1799 allocate_slab+0x5d/0x380 mm/slub.c:1944 new_slab mm/slub.c:2004 [inline] ___slab_alloc+0x40e/0xcc0 mm/slub.c:3005 __slab_alloc mm/slub.c:3092 [inline] slab_alloc_node mm/slub.c:3183 [inline] slab_alloc mm/slub.c:3225 [inline] __kmalloc_track_caller+0x2d4/0x370 mm/slub.c:4916 kmemdup+0x21/0x50 mm/util.c:128 ieee80211_check_fast_xmit+0x1160/0x15c0 net/mac80211/tx.c:3151 sta_info_move_state+0x4fb/0x840 net/mac80211/sta_info.c:2071 sta_info_pre_move_state net/mac80211/sta_info.h:744 [inline] ieee80211_ibss_finish_sta+0x245/0x340 net/mac80211/ibss.c:580 ieee80211_update_sta_info net/mac80211/ibss.c:1027 [inline] ieee80211_rx_bss_info net/mac80211/ibss.c:1117 [inline] ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1610 [inline] ieee80211_ibss_rx_queued_mgmt+0x1347/0x2b30 net/mac80211/ibss.c:1639 ieee80211_iface_process_skb net/mac80211/iface.c:1527 [inline] ieee80211_iface_work+0x713/0xca0 net/mac80211/iface.c:1581 process_one_work+0x83c/0x11a0 kernel/workqueue.c:2289 worker_thread+0xa6c/0x1290 kernel/workqueue.c:2436 kthread+0x2a3/0x2d0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1348 [inline] free_pcp_prepare+0xcbd/0xec0 mm/page_alloc.c:1400 free_unref_page_prepare mm/page_alloc.c:3269 [inline] free_unref_page+0x7d/0x580 mm/page_alloc.c:3364 free_slab mm/slub.c:2043 [inline] discard_slab mm/slub.c:2049 [inline] __unfreeze_partials+0x1ab/0x200 mm/slub.c:2523 put_cpu_partial+0x116/0x180 mm/slub.c:2599 do_slab_free mm/slub.c:3498 [inline] ___cache_free+0x117/0x1c0 mm/slub.c:3517 qlist_free_all mm/kasan/quarantine.c:176 [inline] kasan_quarantine_reduce+0x127/0x190 mm/kasan/quarantine.c:283 __kasan_slab_alloc+0x2f/0xe0 mm/kasan/common.c:446 kasan_slab_alloc include/linux/kasan.h:239 [inline] slab_post_alloc_hook mm/slab.h:749 [inline] slab_alloc_node mm/slub.c:3217 [inline] kmem_cache_alloc_node+0x201/0x370 mm/slub.c:3267 __alloc_skb+0xd8/0x5a0 net/core/skbuff.c:414 alloc_skb include/linux/skbuff.h:1300 [inline] alloc_skb_with_frags+0xac/0x750 net/core/skbuff.c:5988 sock_alloc_send_pskb+0x928/0xa60 net/core/sock.c:2600 mld_newpack+0x1d7/0xa00 net/ipv6/mcast.c:1746 add_grhead net/ipv6/mcast.c:1849 [inline] add_grec+0x1178/0x15c0 net/ipv6/mcast.c:1987 mld_send_cr net/ipv6/mcast.c:2113 [inline] mld_ifc_work+0x6fd/0xc60 net/ipv6/mcast.c:2651 process_one_work+0x83c/0x11a0 kernel/workqueue.c:2289 worker_thread+0xa6c/0x1290 kernel/workqueue.c:2436 Memory state around the buggy address: ffff88807e973100: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc ffff88807e973180: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc >ffff88807e973200: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ^ ffff88807e973280: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc ffff88807e973300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc ==================================================================