================================================================== BUG: KASAN: use-after-free in __add_wait_queue include/linux/wait.h:177 [inline] BUG: KASAN: use-after-free in add_wait_queue+0x1c0/0x260 kernel/sched/wait.c:24 Read of size 4 at addr ffff888075032418 by task syz-executor.1/24716 CPU: 0 PID: 24716 Comm: syz-executor.1 Tainted: G W 5.17.0-syzkaller-01442-gb47d5a4f6b8d #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+0xcd/0x134 lib/dump_stack.c:106 print_address_description.constprop.0.cold+0x8d/0x336 mm/kasan/report.c:255 __kasan_report mm/kasan/report.c:442 [inline] kasan_report.cold+0x83/0xdf mm/kasan/report.c:459 __add_wait_queue include/linux/wait.h:177 [inline] add_wait_queue+0x1c0/0x260 kernel/sched/wait.c:24 __io_queue_proc+0x18c/0x6f0 fs/io_uring.c:6131 poll_wait include/linux/poll.h:49 [inline] n_tty_poll+0x76/0x8a0 drivers/tty/n_tty.c:2322 tty_poll+0x139/0x1b0 drivers/tty/tty_io.c:2212 vfs_poll include/linux/poll.h:88 [inline] __io_arm_poll_handler+0x397/0xc00 fs/io_uring.c:6165 io_arm_poll_handler+0x42c/0x940 fs/io_uring.c:6257 io_queue_sqe_arm_apoll+0x6d/0x430 fs/io_uring.c:7499 __io_queue_sqe fs/io_uring.c:7541 [inline] io_queue_sqe fs/io_uring.c:7568 [inline] io_submit_sqe fs/io_uring.c:7776 [inline] io_submit_sqes+0x7dda/0x9310 fs/io_uring.c:7882 __do_sys_io_uring_enter+0x9f1/0x1520 fs/io_uring.c:10924 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fd7e1506049 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:00007fd7dfe7b168 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa RAX: ffffffffffffffda RBX: 00007fd7e1618f60 RCX: 00007fd7e1506049 RDX: 0000000000000000 RSI: 00000000000002ff RDI: 0000000000000005 RBP: 00007fd7e156008d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fd7e1b4cb1f R14: 00007fd7dfe7b300 R15: 0000000000022000 Allocated by task 24700: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38 kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:436 [inline] ____kasan_kmalloc mm/kasan/common.c:515 [inline] ____kasan_kmalloc mm/kasan/common.c:474 [inline] __kasan_kmalloc+0xa9/0xd0 mm/kasan/common.c:524 kmalloc include/linux/slab.h:581 [inline] io_arm_poll_handler+0x39d/0x940 fs/io_uring.c:6248 io_queue_sqe_arm_apoll+0x6d/0x430 fs/io_uring.c:7499 __io_queue_sqe fs/io_uring.c:7541 [inline] io_queue_sqe fs/io_uring.c:7568 [inline] io_submit_sqe fs/io_uring.c:7776 [inline] io_submit_sqes+0x7dda/0x9310 fs/io_uring.c:7882 __do_sys_io_uring_enter+0x9f1/0x1520 fs/io_uring.c:10924 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae Freed by task 10: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38 kasan_set_track+0x21/0x30 mm/kasan/common.c:45 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:370 ____kasan_slab_free mm/kasan/common.c:366 [inline] ____kasan_slab_free+0x126/0x160 mm/kasan/common.c:328 kasan_slab_free include/linux/kasan.h:215 [inline] slab_free_hook mm/slub.c:1728 [inline] slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1754 slab_free mm/slub.c:3509 [inline] kfree+0xd0/0x390 mm/slub.c:4562 io_flush_apoll_cache fs/io_uring.c:10038 [inline] io_ring_ctx_free fs/io_uring.c:10064 [inline] io_ring_exit_work+0x7f7/0x1053 fs/io_uring.c:10244 process_one_work+0x9ac/0x1650 kernel/workqueue.c:2307 worker_thread+0x657/0x1110 kernel/workqueue.c:2454 kthread+0x2e9/0x3a0 kernel/kthread.c:377 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Last potentially related work creation: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38 __kasan_record_aux_stack+0xbe/0xd0 mm/kasan/generic.c:348 kvfree_call_rcu+0x74/0x990 kernel/rcu/tree.c:3595 cfg80211_update_known_bss+0x833/0xa60 net/wireless/scan.c:1661 cfg80211_bss_update+0xef/0x2070 net/wireless/scan.c:1708 cfg80211_inform_single_bss_frame_data+0x731/0xf40 net/wireless/scan.c:2464 cfg80211_inform_bss_frame_data+0xa7/0xb50 net/wireless/scan.c:2497 ieee80211_bss_info_update+0x35b/0xb00 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+0x19cf/0x3150 net/mac80211/ibss.c:1639 ieee80211_iface_process_skb net/mac80211/iface.c:1527 [inline] ieee80211_iface_work+0xa69/0xd00 net/mac80211/iface.c:1581 process_one_work+0x9ac/0x1650 kernel/workqueue.c:2307 worker_thread+0x657/0x1110 kernel/workqueue.c:2454 kthread+0x2e9/0x3a0 kernel/kthread.c:377 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Second to last potentially related work creation: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38 __kasan_record_aux_stack+0xbe/0xd0 mm/kasan/generic.c:348 kvfree_call_rcu+0x74/0x990 kernel/rcu/tree.c:3595 cfg80211_update_known_bss+0x833/0xa60 net/wireless/scan.c:1661 cfg80211_bss_update+0xef/0x2070 net/wireless/scan.c:1708 cfg80211_inform_single_bss_frame_data+0x731/0xf40 net/wireless/scan.c:2464 cfg80211_inform_bss_frame_data+0xa7/0xb50 net/wireless/scan.c:2497 ieee80211_bss_info_update+0x35b/0xb00 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+0x19cf/0x3150 net/mac80211/ibss.c:1639 ieee80211_iface_process_skb net/mac80211/iface.c:1527 [inline] ieee80211_iface_work+0xa69/0xd00 net/mac80211/iface.c:1581 process_one_work+0x9ac/0x1650 kernel/workqueue.c:2307 worker_thread+0x657/0x1110 kernel/workqueue.c:2454 kthread+0x2e9/0x3a0 kernel/kthread.c:377 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 The buggy address belongs to the object at ffff888075032400 which belongs to the cache kmalloc-96 of size 96 The buggy address is located 24 bytes inside of 96-byte region [ffff888075032400, ffff888075032460) The buggy address belongs to the page: page:ffffea0001d40c80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x75032 flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 ffffea0001e1bb40 dead000000000002 ffff888010c41780 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 21, ts 53854117446, free_ts 53838041749 prep_new_page mm/page_alloc.c:2434 [inline] get_page_from_freelist+0xa72/0x2f50 mm/page_alloc.c:4165 __alloc_pages+0x1b2/0x500 mm/page_alloc.c:5389 alloc_pages+0x1aa/0x310 mm/mempolicy.c:2271 alloc_slab_page mm/slub.c:1799 [inline] allocate_slab+0x27f/0x3c0 mm/slub.c:1944 new_slab mm/slub.c:2004 [inline] ___slab_alloc+0xbe1/0x12b0 mm/slub.c:3018 __slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3105 slab_alloc_node mm/slub.c:3196 [inline] slab_alloc mm/slub.c:3238 [inline] kmem_cache_alloc_trace+0x2f8/0x3d0 mm/slub.c:3255 kmalloc include/linux/slab.h:581 [inline] kzalloc include/linux/slab.h:714 [inline] nsim_fib_event_schedule_work drivers/net/netdevsim/fib.c:978 [inline] nsim_fib_event_nb+0x1b6/0xc50 drivers/net/netdevsim/fib.c:1028 notifier_call_chain+0xb5/0x200 kernel/notifier.c:84 atomic_notifier_call_chain+0x70/0x180 kernel/notifier.c:199 call_fib_notifiers+0x119/0x2a0 net/core/fib_notifier.c:35 call_fib6_entry_notifiers net/ipv6/ip6_fib.c:402 [inline] fib6_add_rt2node net/ipv6/ip6_fib.c:1224 [inline] fib6_add+0xe21/0x3f10 net/ipv6/ip6_fib.c:1478 __ip6_ins_rt net/ipv6/route.c:1302 [inline] ip6_ins_rt+0xb2/0x110 net/ipv6/route.c:1312 __ipv6_ifa_notify+0x84e/0xa90 net/ipv6/addrconf.c:6133 ipv6_ifa_notify net/ipv6/addrconf.c:6172 [inline] addrconf_dad_completed+0x150/0xd60 net/ipv6/addrconf.c:4195 addrconf_dad_work+0x79f/0x1340 net/ipv6/addrconf.c:4143 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1352 [inline] free_pcp_prepare+0x374/0x870 mm/page_alloc.c:1404 free_unref_page_prepare mm/page_alloc.c:3325 [inline] free_unref_page+0x19/0x690 mm/page_alloc.c:3404 qlink_free mm/kasan/quarantine.c:157 [inline] qlist_free_all+0x6d/0x160 mm/kasan/quarantine.c:176 kasan_quarantine_reduce+0x180/0x200 mm/kasan/quarantine.c:283 __kasan_slab_alloc+0xa2/0xc0 mm/kasan/common.c:446 kasan_slab_alloc include/linux/kasan.h:239 [inline] slab_post_alloc_hook mm/slab.h:732 [inline] slab_alloc_node mm/slub.c:3230 [inline] slab_alloc mm/slub.c:3238 [inline] kmem_cache_alloc_trace+0x258/0x3d0 mm/slub.c:3255 kmalloc include/linux/slab.h:581 [inline] netdevice_queue_work drivers/infiniband/core/roce_gid_mgmt.c:643 [inline] netdevice_event+0x1a8/0x8a0 drivers/infiniband/core/roce_gid_mgmt.c:802 notifier_call_chain+0xb5/0x200 kernel/notifier.c:84 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:1919 call_netdevice_notifiers_extack net/core/dev.c:1931 [inline] call_netdevice_notifiers net/core/dev.c:1945 [inline] register_netdevice+0x10df/0x1580 net/core/dev.c:9698 veth_newlink+0x59c/0xa90 drivers/net/veth.c:1725 __rtnl_newlink+0x107c/0x1760 net/core/rtnetlink.c:3483 rtnl_newlink+0x64/0xa0 net/core/rtnetlink.c:3531 rtnetlink_rcv_msg+0x413/0xb80 net/core/rtnetlink.c:5596 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2494 netlink_unicast_kernel net/netlink/af_netlink.c:1317 [inline] netlink_unicast+0x539/0x7e0 net/netlink/af_netlink.c:1343 Memory state around the buggy address: ffff888075032300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc ffff888075032380: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc >ffff888075032400: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ^ ffff888075032480: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc ffff888075032500: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc ==================================================================