syzbot |
sign-in | mailing list | source | docs |
| Kernel | Title | Repro | Cause bisect | Fix bisect | Count | Last | Reported | Patched | Status |
|---|---|---|---|---|---|---|---|---|---|
| upstream | KASAN: slab-out-of-bounds Read in macvlan_broadcast net | C | done | 10 | 1778d | 1781d | 15/28 | fixed on 2020/02/18 14:31 | |
| linux-4.14 | KASAN: slab-out-of-bounds Read in macvlan_broadcast | C | done | 6 | 1776d | 1781d | 1/1 | fixed on 2020/02/10 15:38 |
IPv6: ADDRCONF(NETDEV_UP): macvlan0: link is not ready IPv6: ADDRCONF(NETDEV_UP): macvlan1: link is not ready protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 ================================================================== BUG: KASAN: slab-out-of-bounds in __get_unaligned_cpu32 include/linux/unaligned/packed_struct.h:19 [inline] BUG: KASAN: slab-out-of-bounds in mc_hash drivers/net/macvlan.c:255 [inline] BUG: KASAN: slab-out-of-bounds in macvlan_broadcast+0x57c/0x660 drivers/net/macvlan.c:281 Read of size 4 at addr ffff8880a4c86501 by task syz-executor075/8207 CPU: 1 PID: 8207 Comm: syz-executor075 Not tainted 4.19.93-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x197/0x210 lib/dump_stack.c:118 print_address_description.cold+0x7c/0x20d mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report mm/kasan/report.c:412 [inline] kasan_report.cold+0x8c/0x2ba mm/kasan/report.c:396 __asan_report_load_n_noabort+0xf/0x20 mm/kasan/report.c:443 __get_unaligned_cpu32 include/linux/unaligned/packed_struct.h:19 [inline] mc_hash drivers/net/macvlan.c:255 [inline] macvlan_broadcast+0x57c/0x660 drivers/net/macvlan.c:281 macvlan_queue_xmit drivers/net/macvlan.c:524 [inline] macvlan_start_xmit+0x408/0x785 drivers/net/macvlan.c:563 __netdev_start_xmit include/linux/netdevice.h:4308 [inline] netdev_start_xmit include/linux/netdevice.h:4317 [inline] dev_direct_xmit+0x34d/0x650 net/core/dev.c:3909 packet_direct_xmit+0xf9/0x170 net/packet/af_packet.c:246 packet_snd net/packet/af_packet.c:2958 [inline] packet_sendmsg+0x3bb2/0x6440 net/packet/af_packet.c:2983 sock_sendmsg_nosec net/socket.c:622 [inline] sock_sendmsg+0xd7/0x130 net/socket.c:632 __sys_sendto+0x262/0x380 net/socket.c:1787 __do_sys_sendto net/socket.c:1799 [inline] __se_sys_sendto net/socket.c:1795 [inline] __x64_sys_sendto+0xe1/0x1a0 net/socket.c:1795 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x442529 Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 0f 83 5b 10 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffdba266a58 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000442529 RDX: 000000000000000e RSI: 0000000020000080 RDI: 0000000000000003 RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000403aa0 R14: 0000000000000000 R15: 0000000000000000 Allocated by task 7297: save_stack+0x45/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc mm/kasan/kasan.c:553 [inline] kasan_kmalloc+0xce/0xf0 mm/kasan/kasan.c:531 kasan_slab_alloc+0xf/0x20 mm/kasan/kasan.c:490 kmem_cache_alloc+0x12e/0x700 mm/slab.c:3559 getname_flags fs/namei.c:140 [inline] getname_flags+0xd6/0x5b0 fs/namei.c:129 user_path_at_empty+0x2f/0x50 fs/namei.c:2608 user_path_at include/linux/namei.h:57 [inline] do_faccessat+0x262/0x7f0 fs/open.c:397 __do_sys_access fs/open.c:449 [inline] __se_sys_access fs/open.c:447 [inline] __x64_sys_access+0x59/0x80 fs/open.c:447 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 7297: save_stack+0x45/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] __kasan_slab_free+0x102/0x150 mm/kasan/kasan.c:521 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528 __cache_free mm/slab.c:3503 [inline] kmem_cache_free+0x86/0x260 mm/slab.c:3765 putname+0xef/0x130 fs/namei.c:261 filename_lookup+0x28f/0x410 fs/namei.c:2357 user_path_at_empty+0x43/0x50 fs/namei.c:2608 user_path_at include/linux/namei.h:57 [inline] do_faccessat+0x262/0x7f0 fs/open.c:397 __do_sys_access fs/open.c:449 [inline] __se_sys_access fs/open.c:447 [inline] __x64_sys_access+0x59/0x80 fs/open.c:447 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff8880a4c86d00 which belongs to the cache names_cache of size 4096 The buggy address is located 2047 bytes to the left of 4096-byte region [ffff8880a4c86d00, ffff8880a4c87d00) The buggy address belongs to the page: page:ffffea0002932180 count:1 mapcount:0 mapping:ffff88821bc47980 index:0x0 compound_mapcount: 0 flags: 0xfffe0000008100(slab|head) raw: 00fffe0000008100 ffffea0002a0fc08 ffffea0002921e08 ffff88821bc47980 raw: 0000000000000000 ffff8880a4c86d00 0000000100000001 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880a4c86400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880a4c86480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8880a4c86500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff8880a4c86580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880a4c86600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================