================================================================== BUG: KASAN: double-free in slab_free mm/slub.c:3599 [inline] BUG: KASAN: double-free in __kmem_cache_free+0xab/0x3b0 mm/slub.c:3612 Free of addr ffff88801feed000 by task syz-executor.1/16664 CPU: 1 PID: 16664 Comm: syz-executor.1 Not tainted 6.0.0-rc6-next-20220923-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:284 [inline] print_report+0x15e/0x45d mm/kasan/report.c:395 kasan_report_invalid_free+0x97/0x1b0 mm/kasan/report.c:460 ____kasan_slab_free+0x185/0x1c0 mm/kasan/common.c:225 kasan_slab_free include/linux/kasan.h:177 [inline] slab_free_hook mm/slub.c:1669 [inline] slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1695 slab_free mm/slub.c:3599 [inline] __kmem_cache_free+0xab/0x3b0 mm/slub.c:3612 io_clean_op+0x581/0xb10 io_uring/io_uring.c:1699 io_free_batch_list+0x46f/0x7e0 io_uring/io_uring.c:1305 __io_submit_flush_completions+0x22b/0x2e0 io_uring/io_uring.c:1343 io_submit_flush_completions io_uring/io_uring.c:171 [inline] ctx_flush_and_put+0xdf/0x1b0 io_uring/io_uring.c:1003 tctx_task_work+0x153/0x4a0 io_uring/io_uring.c:1087 task_work_run+0x16b/0x270 kernel/task_work.c:179 get_signal+0x1c3/0x2430 kernel/signal.c:2635 arch_do_signal_or_restart+0x82/0x2300 arch/x86/kernel/signal.c:869 exit_to_user_mode_loop kernel/entry/common.c:168 [inline] exit_to_user_mode_prepare+0x15f/0x250 kernel/entry/common.c:203 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:296 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f588928b5a9 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:00007f588a325168 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa RAX: 0000000000000002 RBX: 00007f58893abf80 RCX: 00007f588928b5a9 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000003 RBP: 00007f58892e6580 R08: 0000000020000000 R09: 0000000000000008 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffb193f0df R14: 00007f588a325300 R15: 0000000000022000 Allocated by task 16664: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:45 kasan_set_track+0x21/0x30 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:371 [inline] ____kasan_kmalloc mm/kasan/common.c:330 [inline] __kasan_kmalloc+0xa1/0xb0 mm/kasan/common.c:380 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slab_common.c:934 [inline] __kmalloc+0x54/0xc0 mm/slab_common.c:947 kmalloc include/linux/slab.h:564 [inline] io_alloc_async_data+0x9b/0x160 io_uring/io_uring.c:1590 io_msg_alloc_async io_uring/net.c:138 [inline] io_msg_alloc_async_prep io_uring/net.c:147 [inline] io_sendmsg_prep_async+0x19b/0x3c0 io_uring/net.c:221 io_req_prep_async+0x1d9/0x300 io_uring/io_uring.c:1613 io_submit_sqe io_uring/io_uring.c:2137 [inline] io_submit_sqes+0xfcd/0x1df0 io_uring/io_uring.c:2276 __do_sys_io_uring_enter+0xac6/0x2410 io_uring/io_uring.c:3216 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+0x63/0xcd Freed by task 16664: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:45 kasan_set_track+0x21/0x30 mm/kasan/common.c:52 kasan_save_free_info+0x2a/0x40 mm/kasan/generic.c:511 ____kasan_slab_free mm/kasan/common.c:236 [inline] ____kasan_slab_free+0x160/0x1c0 mm/kasan/common.c:200 kasan_slab_free include/linux/kasan.h:177 [inline] slab_free_hook mm/slub.c:1669 [inline] slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1695 slab_free mm/slub.c:3599 [inline] __kmem_cache_free+0xab/0x3b0 mm/slub.c:3612 io_send_zc_cleanup+0x133/0x180 io_uring/net.c:916 io_clean_op+0xf4/0xb10 io_uring/io_uring.c:1684 io_free_batch_list+0x46f/0x7e0 io_uring/io_uring.c:1305 __io_submit_flush_completions+0x22b/0x2e0 io_uring/io_uring.c:1343 io_submit_flush_completions io_uring/io_uring.c:171 [inline] ctx_flush_and_put+0xdf/0x1b0 io_uring/io_uring.c:1003 tctx_task_work+0x153/0x4a0 io_uring/io_uring.c:1087 task_work_run+0x16b/0x270 kernel/task_work.c:179 get_signal+0x1c3/0x2430 kernel/signal.c:2635 arch_do_signal_or_restart+0x82/0x2300 arch/x86/kernel/signal.c:869 exit_to_user_mode_loop kernel/entry/common.c:168 [inline] exit_to_user_mode_prepare+0x15f/0x250 kernel/entry/common.c:203 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:296 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd Last potentially related work creation: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:45 __kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:481 call_rcu+0x99/0x820 kernel/rcu/tree.c:2796 sctp_endpoint_destroy net/sctp/endpointola.c:228 [inline] sctp_endpoint_put+0x18f/0x200 net/sctp/endpointola.c:243 sctp_destroy_sock+0xa2/0x3d0 net/sctp/socket.c:5095 sctp_v6_destroy_sock+0x11/0x20 net/sctp/socket.c:9668 sk_common_release+0x64/0x390 net/core/sock.c:3646 sctp_close+0x4d8/0x940 net/sctp/socket.c:1548 inet_release+0x12e/0x270 net/ipv4/af_inet.c:428 inet6_release+0x4c/0x70 net/ipv6/af_inet6.c:482 __sock_release+0xcd/0x280 net/socket.c:650 sock_close+0x18/0x20 net/socket.c:1365 __fput+0x27c/0xa90 fs/file_table.c:320 task_work_run+0x16b/0x270 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x23c/0x250 kernel/entry/common.c:203 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:296 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd Second to last potentially related work creation: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:45 __kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:481 call_rcu+0x99/0x820 kernel/rcu/tree.c:2796 inetdev_destroy net/ipv4/devinet.c:331 [inline] inetdev_event+0xd4a/0x1610 net/ipv4/devinet.c:1602 notifier_call_chain+0xb5/0x200 kernel/notifier.c:87 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:1945 call_netdevice_notifiers_extack net/core/dev.c:1983 [inline] call_netdevice_notifiers net/core/dev.c:1997 [inline] unregister_netdevice_many+0xaef/0x1a40 net/core/dev.c:10860 sit_exit_batch_net+0x530/0x750 net/ipv6/sit.c:1942 ops_exit_list+0x125/0x170 net/core/net_namespace.c:168 cleanup_net+0x4ea/0xb00 net/core/net_namespace.c:595 process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2e4/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 The buggy address belongs to the object at ffff88801feed000 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 0 bytes inside of 512-byte region [ffff88801feed000, ffff88801feed200) The buggy address belongs to the physical page: page:ffffea00007fbb00 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffffea0000891c00 pfn:0x1feec head:ffffea00007fbb00 order:2 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffff888011841c80 dead000080100010 0000000000000000 raw: ffffea0000891c00 dead000000000002 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1083, tgid 1083 (kworker/u4:0), ts 8164973996, free_ts 0 prep_new_page mm/page_alloc.c:2538 [inline] get_page_from_freelist+0x1092/0x2d20 mm/page_alloc.c:4287 __alloc_pages+0x1c7/0x5a0 mm/page_alloc.c:5546 alloc_pages+0x1a6/0x270 mm/mempolicy.c:2280 alloc_slab_page mm/slub.c:1739 [inline] allocate_slab+0x213/0x300 mm/slub.c:1884 new_slab mm/slub.c:1937 [inline] ___slab_alloc+0xac1/0x1430 mm/slub.c:3119 __slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3217 slab_alloc_node mm/slub.c:3302 [inline] __kmem_cache_alloc_node+0x18a/0x3d0 mm/slub.c:3375 kmalloc_trace+0x22/0x60 mm/slab_common.c:1014 kmalloc include/linux/slab.h:559 [inline] kzalloc include/linux/slab.h:695 [inline] alloc_bprm+0x51/0x900 fs/exec.c:1510 kernel_execve+0xab/0x500 fs/exec.c:1969 call_usermodehelper_exec_async+0x2e3/0x580 kernel/umh.c:113 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 page_owner free stack trace missing Memory state around the buggy address: ffff88801feecf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88801feecf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88801feed000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88801feed080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88801feed100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================