KASAN: use-after-free Write in tcp_sendmsg

Kernel	Title	Rank 🛈	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	KASAN: use-after-free Write in tcp_sendmsg_locked (2) net	24				2	788d	807d	0/29	closed as invalid on 2023/09/01 06:55

================================================================== BUG: KASAN: use-after-free in instrument_copy_from_user_before include/linux/instrumented.h:137 [inline] BUG: KASAN: use-after-free in copyin lib/iov_iter.c:182 [inline] BUG: KASAN: use-after-free in _copy_from_iter+0x2b8/0x1030 lib/iov_iter.c:628 Write of size 16420 at addr ffff888033e781b4 by task sshd/5055 CPU: 1 PID: 5055 Comm: sshd Not tainted 6.3.0-rc6-syzkaller-00183-ga7a55e27ad72 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:319 [inline] print_report+0x163/0x540 mm/kasan/report.c:430 kasan_report+0x176/0x1b0 mm/kasan/report.c:536 kasan_check_range+0x283/0x290 mm/kasan/generic.c:187 instrument_copy_from_user_before include/linux/instrumented.h:137 [inline] copyin lib/iov_iter.c:182 [inline] _copy_from_iter+0x2b8/0x1030 lib/iov_iter.c:628 copy_from_iter include/linux/uio.h:189 [inline] copy_from_iter_full include/linux/uio.h:196 [inline] skb_do_copy_data_nocache include/net/sock.h:2245 [inline] skb_copy_to_page_nocache include/net/sock.h:2271 [inline] tcp_sendmsg_locked+0x173c/0x4100 net/ipv4/tcp.c:1377 tcp_sendmsg+0x30/0x50 net/ipv4/tcp.c:1484 sock_sendmsg_nosec net/socket.c:724 [inline] sock_sendmsg net/socket.c:747 [inline] sock_write_iter+0x397/0x520 net/socket.c:1138 call_write_iter include/linux/fs.h:1851 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x7b2/0xbb0 fs/read_write.c:584 ksys_write+0x1a0/0x2c0 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f294c5259a3 Code: 8b 15 d9 f4 0c 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 64 8b 04 25 18 00 00 00 85 c0 75 14 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 55 c3 0f 1f 40 00 48 83 ec 28 48 89 54 24 18 RSP: 002b:00007ffff28ecde8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000004024 RCX: 00007f294c5259a3 RDX: 0000000000004024 RSI: 0000560350c73fd0 RDI: 0000000000000004 RBP: 0000560350c60840 R08: 0000000000000000 R09: 0000000000000070 R10: 00007ffff2933080 R11: 0000000000000246 R12: 0000000000000004 R13: 0000000000000001 R14: 00007ffff28ece58 R15: 00007ffff28eced8 </TASK> The buggy address belongs to the physical page: page:ffffea0000cf9e00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x33e78 head:ffffea0000cf9e00 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffff888012442140 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000040004 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 0x1d2820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 16037, tgid 16037 (kworker/0:1), ts 2189604415796, free_ts 2189475047415 prep_new_page mm/page_alloc.c:2553 [inline] get_page_from_freelist+0x3246/0x33c0 mm/page_alloc.c:4326 __alloc_pages+0x255/0x670 mm/page_alloc.c:5592 alloc_slab_page+0x6a/0x160 mm/slub.c:1851 allocate_slab mm/slub.c:1998 [inline] new_slab+0x84/0x2f0 mm/slub.c:2051 ___slab_alloc+0xa85/0x10a0 mm/slub.c:3193 __slab_alloc mm/slub.c:3292 [inline] __slab_alloc_node mm/slub.c:3345 [inline] slab_alloc_node mm/slub.c:3442 [inline] __kmem_cache_alloc_node+0x1b8/0x290 mm/slub.c:3491 __do_kmalloc_node mm/slab_common.c:966 [inline] __kmalloc_node_track_caller+0xa5/0x230 mm/slab_common.c:987 kmalloc_reserve+0xfe/0x240 net/core/skbuff.c:537 __alloc_skb+0x1b1/0x420 net/core/skbuff.c:606 alloc_skb include/linux/skbuff.h:1277 [inline] nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:751 [inline] nsim_dev_trap_report drivers/net/netdevsim/dev.c:808 [inline] nsim_dev_trap_report_work+0x250/0xa90 drivers/net/netdevsim/dev.c:853 process_one_work+0x8a0/0x10e0 kernel/workqueue.c:2390 worker_thread+0xa63/0x1210 kernel/workqueue.c:2537 kthread+0x270/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1454 [inline] free_pcp_prepare mm/page_alloc.c:1504 [inline] free_unref_page_prepare+0xe2f/0xe70 mm/page_alloc.c:3388 free_unref_page+0x37/0x3f0 mm/page_alloc.c:3483 __skb_frag_unref include/linux/skbuff.h:3413 [inline] skb_release_data+0x398/0x810 net/core/skbuff.c:893 skb_release_all net/core/skbuff.c:964 [inline] __kfree_skb+0x55/0x70 net/core/skbuff.c:978 tcp_clean_rtx_queue net/ipv4/tcp_input.c:3334 [inline] tcp_ack+0x235a/0x6c10 net/ipv4/tcp_input.c:3884 tcp_rcv_established+0xf2d/0x1df0 net/ipv4/tcp_input.c:5926 tcp_v4_do_rcv+0x48b/0xb00 net/ipv4/tcp_ipv4.c:1721 tcp_v4_rcv+0x2831/0x30c0 net/ipv4/tcp_ipv4.c:2143 ip_protocol_deliver_rcu+0x5a3/0xd20 net/ipv4/ip_input.c:205 ip_local_deliver_finish+0x290/0x4c0 net/ipv4/ip_input.c:233 NF_HOOK+0x368/0x410 include/linux/netfilter.h:302 dst_input include/net/dst.h:454 [inline] ip_sublist_rcv_finish net/ipv4/ip_input.c:580 [inline] ip_list_rcv_finish net/ipv4/ip_input.c:630 [inline] ip_sublist_rcv+0xa95/0xde0 net/ipv4/ip_input.c:638 ip_list_rcv+0x426/0x470 net/ipv4/ip_input.c:673 __netif_receive_skb_list_ptype net/core/dev.c:5523 [inline] __netif_receive_skb_list_core+0x6b5/0x890 net/core/dev.c:5571 __netif_receive_skb_list net/core/dev.c:5623 [inline] netif_receive_skb_list_internal+0x9f9/0xe00 net/core/dev.c:5714 gro_normal_list include/net/gro.h:433 [inline] napi_complete_done+0x310/0x8a0 net/core/dev.c:6054 Memory state around the buggy address: ffff888033e78080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888033e78100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888033e78180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888033e78200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888033e78280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================