Kernel | Title | Repro | Cause bisect | Fix bisect | Count | Last | Reported | Patched | Status |
---|---|---|---|---|---|---|---|---|---|
upstream | KASAN: slab-out-of-bounds Read in skb_gso_transport_seglen net | C | done | 4 | 1620d | 1639d | 15/28 | fixed on 2020/07/17 17:58 |
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Kernel | Title | Repro | Cause bisect | Fix bisect | Count | Last | Reported | Patched | Status |
---|---|---|---|---|---|---|---|---|---|
upstream | KASAN: slab-out-of-bounds Read in skb_gso_transport_seglen net | C | done | 4 | 1620d | 1639d | 15/28 | fixed on 2020/07/17 17:58 |
================================================================== BUG: KASAN: slab-out-of-bounds in __tcp_hdrlen include/linux/tcp.h:35 [inline] BUG: KASAN: slab-out-of-bounds in tcp_hdrlen include/linux/tcp.h:40 [inline] BUG: KASAN: slab-out-of-bounds in skb_gso_transport_seglen+0x2df/0x300 net/core/skbuff.c:4944 Read of size 2 at addr ffff888066eb8a8c by task syz-executor.5/29803 CPU: 1 PID: 29803 Comm: syz-executor.5 Not tainted 4.14.179-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x13e/0x194 lib/dump_stack.c:58 print_address_description.cold+0x7c/0x1e2 mm/kasan/report.c:252 kasan_report_error mm/kasan/report.c:351 [inline] kasan_report mm/kasan/report.c:409 [inline] kasan_report.cold+0xa9/0x2ae mm/kasan/report.c:393 __tcp_hdrlen include/linux/tcp.h:35 [inline] tcp_hdrlen include/linux/tcp.h:40 [inline] skb_gso_transport_seglen+0x2df/0x300 net/core/skbuff.c:4944 skb_gso_mac_seglen include/linux/skbuff.h:4124 [inline] tbf_enqueue+0x248/0x930 net/sched/sch_tbf.c:191 __dev_xmit_skb net/core/dev.c:3229 [inline] __dev_queue_xmit+0x12dc/0x25c0 net/core/dev.c:3493 packet_snd net/packet/af_packet.c:3012 [inline] packet_sendmsg+0x1bf7/0x54b0 net/packet/af_packet.c:3037 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xc5/0x100 net/socket.c:656 SYSC_sendto+0x1c4/0x2b0 net/socket.c:1763 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x45c829 RSP: 002b:00007f8044138c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 0000000000500fa0 RCX: 000000000045c829 RDX: 0000000000004e60 RSI: 0000000020000180 RDI: 0000000000000003 RBP: 000000000078bf00 R08: 0000000000000000 R09: fffffffffffffe5d R10: 0000000000000810 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000a0f R14: 00000000004ccc62 R15: 00007f80441396d4 Allocated by task 29803: save_stack+0x32/0xa0 mm/kasan/kasan.c:447 set_track mm/kasan/kasan.c:459 [inline] kasan_kmalloc mm/kasan/kasan.c:551 [inline] kasan_kmalloc+0xbf/0xe0 mm/kasan/kasan.c:529 __do_kmalloc_node mm/slab.c:3682 [inline] __kmalloc_node_track_caller+0x4c/0x70 mm/slab.c:3696 __kmalloc_reserve.isra.0+0x35/0xd0 net/core/skbuff.c:137 __alloc_skb+0xca/0x4c0 net/core/skbuff.c:205 alloc_skb include/linux/skbuff.h:980 [inline] alloc_skb_with_frags+0x85/0x4f0 net/core/skbuff.c:5228 sock_alloc_send_pskb+0x586/0x6d0 net/core/sock.c:2081 packet_alloc_skb net/packet/af_packet.c:2862 [inline] packet_snd net/packet/af_packet.c:2957 [inline] packet_sendmsg+0x1529/0x54b0 net/packet/af_packet.c:3037 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xc5/0x100 net/socket.c:656 SYSC_sendto+0x1c4/0x2b0 net/socket.c:1763 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 Freed by task 1: save_stack+0x32/0xa0 mm/kasan/kasan.c:447 set_track mm/kasan/kasan.c:459 [inline] kasan_slab_free+0x75/0xc0 mm/kasan/kasan.c:524 __cache_free mm/slab.c:3496 [inline] kfree+0xcb/0x260 mm/slab.c:3815 kernfs_fop_release+0x10d/0x180 fs/kernfs/file.c:783 __fput+0x25f/0x790 fs/file_table.c:210 task_work_run+0x113/0x190 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x1d6/0x220 arch/x86/entry/common.c:164 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x42/0xb7 The buggy address belongs to the object at ffff888066eb8840 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 76 bytes to the right of 512-byte region [ffff888066eb8840, ffff888066eb8a40) The buggy address belongs to the page: page:ffffea00019bae00 count:1 mapcount:0 mapping:ffff888066eb80c0 index:0xffff888066eb8d40 flags: 0xfffe0000000100(slab) raw: 00fffe0000000100 ffff888066eb80c0 ffff888066eb8d40 0000000100000003 raw: ffffea00021da660 ffffea0001690160 ffff88812fe54940 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff888066eb8980: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888066eb8a00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc >ffff888066eb8a80: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 ^ ffff888066eb8b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888066eb8b80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2020/05/07 10:33 | linux-4.14.y | d71f695ce745 | 98cbd87b | .config | console log | report | ci2-linux-4-14 |