================================================================== BUG: KASAN: use-after-free in __add_wait_queue include/linux/wait.h:177 [inline] BUG: KASAN: use-after-free in add_wait_queue+0x249/0x260 kernel/sched/wait.c:23 Read of size 4 at addr ffff88807a9e1298 by task syz-executor.1/7310 CPU: 1 PID: 7310 Comm: syz-executor.1 Tainted: G W 5.17.0-syzkaller-02172-g6b1f86f8e9c7 #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:255 __kasan_report mm/kasan/report.c:442 [inline] kasan_report+0x19a/0x1f0 mm/kasan/report.c:459 __add_wait_queue include/linux/wait.h:177 [inline] add_wait_queue+0x249/0x260 kernel/sched/wait.c:23 poll_wait include/linux/poll.h:49 [inline] n_tty_poll+0x68/0x790 drivers/tty/n_tty.c:2322 tty_poll+0x109/0x200 drivers/tty/tty_io.c:2212 vfs_poll include/linux/poll.h:88 [inline] __io_arm_poll_handler+0x307/0xe20 fs/io_uring.c:6165 io_arm_poll_handler+0x4ab/0x710 fs/io_uring.c:6257 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+0x1265/0xb050 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 RIP: 0033:0x7f3de4a89049 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f3de5c8f168 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa RAX: ffffffffffffffda RBX: 00007f3de4b9c030 RCX: 00007f3de4a89049 RDX: 0000000000000000 RSI: 0000000000001261 RDI: 0000000000000004 RBP: 00007f3de4ae308d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd49de611f R14: 00007f3de5c8f300 R15: 0000000000022000 Allocated by task 7239: 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:3271 kmalloc include/linux/slab.h:584 [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+0x1265/0xb050 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 4787: 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:3523 [inline] kfree+0xc6/0x390 mm/slub.c:4576 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+0x86c/0x1190 kernel/workqueue.c:2307 worker_thread+0xab1/0x1300 kernel/workqueue.c:2454 kthread+0x2a3/0x2d0 kernel/kthread.c:377 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:1708 cfg80211_inform_single_bss_frame_data net/wireless/scan.c:2464 [inline] cfg80211_inform_bss_frame_data+0x9e2/0x2190 net/wireless/scan.c:2497 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+0x86c/0x1190 kernel/workqueue.c:2307 worker_thread+0xab1/0x1300 kernel/workqueue.c:2454 kthread+0x2a3/0x2d0 kernel/kthread.c:377 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:1708 cfg80211_inform_single_bss_frame_data net/wireless/scan.c:2464 [inline] cfg80211_inform_bss_frame_data+0x9e2/0x2190 net/wireless/scan.c:2497 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+0x86c/0x1190 kernel/workqueue.c:2307 worker_thread+0xab1/0x1300 kernel/workqueue.c:2454 kthread+0x2a3/0x2d0 kernel/kthread.c:377 ret_from_fork+0x1f/0x30 The buggy address belongs to the object at ffff88807a9e1280 which belongs to the cache kmalloc-96 of size 96 The buggy address is located 24 bytes inside of 96-byte region [ffff88807a9e1280, ffff88807a9e12e0) The buggy address belongs to the page: page:ffffea0001ea7840 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7a9e1 flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 ffffea000076d980 dead000000000004 ffff888011841780 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 5, ts 97984336127, free_ts 97965058226 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:3018 __slab_alloc mm/slub.c:3105 [inline] slab_alloc_node mm/slub.c:3196 [inline] slab_alloc mm/slub.c:3238 [inline] kmem_cache_alloc_trace+0x28c/0x330 mm/slub.c:3269 kmalloc include/linux/slab.h:584 [inline] dst_cow_metrics_generic+0x52/0x1c0 net/core/dst.c:199 dst_metrics_write_ptr include/net/dst.h:119 [inline] dst_metric_set include/net/dst.h:180 [inline] icmp6_dst_alloc+0x338/0x510 net/ipv6/route.c:3284 mld_sendpack+0x537/0xc10 net/ipv6/mcast.c:1807 mld_dad_work+0x3c/0x3f0 net/ipv6/mcast.c:2260 process_one_work+0x86c/0x1190 kernel/workqueue.c:2307 worker_thread+0xab1/0x1300 kernel/workqueue.c:2454 kthread+0x2a3/0x2d0 kernel/kthread.c:377 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 do_slab_free mm/slub.c:3511 [inline] ___cache_free+0x117/0x1c0 mm/slub.c:3530 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:3230 [inline] slab_alloc mm/slub.c:3238 [inline] __kmem_cache_alloc_lru mm/slub.c:3245 [inline] kmem_cache_alloc_lru+0x1ad/0x300 mm/slub.c:3262 alloc_inode_sb include/linux/fs.h:3016 [inline] sock_alloc_inode+0x21/0xc0 net/socket.c:304 alloc_inode fs/inode.c:260 [inline] new_inode_pseudo+0x61/0x220 fs/inode.c:1018 sock_alloc net/socket.c:627 [inline] __sock_create+0x12b/0x8d0 net/socket.c:1432 sock_create net/socket.c:1519 [inline] __sys_socket+0x133/0x380 net/socket.c:1561 __do_sys_socket net/socket.c:1570 [inline] __se_sys_socket net/socket.c:1568 [inline] __x64_sys_socket+0x76/0x80 net/socket.c:1568 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 Memory state around the buggy address: ffff88807a9e1180: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ffff88807a9e1200: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc >ffff88807a9e1280: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ^ ffff88807a9e1300: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ffff88807a9e1380: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ==================================================================