Messages in this thread | | | From | Hao Sun <> | Date | Mon, 12 Apr 2021 09:31:43 +0800 | Subject | BUG: unable to handle kernel paging request in __build_skb |
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Hi
When using Healer(https://github.com/SunHao-0/healer/tree/dev) to fuzz the Linux kernel, I found the following bug report, but I'm not sure about this. Sorry, I do not have a reproducing program for this bug. I hope that the stack trace information in the crash log can help you locate the problem.
Here is the details: commit: 4ebaab5fb428374552175aa39832abf5cedb916a version: linux 5.12 git tree: kmsan
============================================== RAX: ffffffffffffffda RBX: 000000000059c080 RCX: 000000000047338d RDX: 0000000000000010 RSI: 0000000020002400 RDI: 0000000000000003 RBP: 00007fb6512c2c90 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000005 R13: 00007fffbb36285f R14: 00007fffbb362a00 R15: 00007fb6512c2dc0 BUG: unable to handle page fault for address: ffffa73d01c96a40 #PF: supervisor write access in kernel mode #PF: error_code(0x0002) - not-present page PGD 1810067 P4D 1810067 PUD 1915067 PMD 4b84067 PTE 0 Oops: 0002 [#1] SMP CPU: 0 PID: 6273 Comm: syz-executor Not tainted 5.12.0-rc6+ #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014 RIP: 0010:memset_erms+0x9/0x10 arch/x86/lib/memset_64.S:64 Code: c1 e9 03 40 0f b6 f6 48 b8 01 01 01 01 01 01 01 01 48 0f af c6 f3 48 ab 89 d1 f3 aa 4c 89 c8 c3 90 49 89 f9 40 88 f0 48 89 d1 <f3> aa 4c 89 c8 c3 90 49 89 fa 40 0f b6 ce 48 b8 01 01 01 01 01 01 RSP: 0018:ffff9f3d01c9b930 EFLAGS: 00010082 RAX: ffffa73d01c96a00 RBX: 0000000000000020 RCX: 0000000000000020 RDX: 0000000000000020 RSI: 0000000000000000 RDI: ffffa73d01c96a40 RBP: ffff9f3d01c9b960 R08: ffffc2390000000f R09: ffffa73d01c96a40 R10: 000000007dee4e6b R11: ffffffffb2000782 R12: 0000000000000000 R13: 0000000000000020 R14: 0000000000000000 R15: ffff9f3d01c96a40 FS: 00007fb6512c3700(0000) GS:ffff97407fa00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffa73d01c96a40 CR3: 0000000030087005 CR4: 0000000000770ef0 PKRU: 55555554 Call Trace: kmsan_internal_unpoison_shadow+0x1d/0x70 mm/kmsan/kmsan.c:110 __msan_memset+0x64/0xb0 mm/kmsan/kmsan_instr.c:130 __build_skb_around net/core/skbuff.c:209 [inline] __build_skb+0x34b/0x520 net/core/skbuff.c:243 netlink_alloc_large_skb net/netlink/af_netlink.c:1193 [inline] netlink_sendmsg+0xdc1/0x14d0 net/netlink/af_netlink.c:1902 sock_sendmsg_nosec net/socket.c:654 [inline] sock_sendmsg net/socket.c:674 [inline] ____sys_sendmsg+0x13b5/0x1450 net/socket.c:2350 ___sys_sendmsg net/socket.c:2404 [inline] __sys_sendmsg+0x683/0x770 net/socket.c:2433 __do_sys_sendmsg net/socket.c:2442 [inline] __se_sys_sendmsg+0x97/0xb0 net/socket.c:2440 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2440 do_syscall_64+0xa2/0x120 arch/x86/entry/common.c:48 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x47338d Code: 02 b8 ff ff ff ff c3 66 0f 1f 44 00 00 f3 0f 1e fa 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fb6512c2c58 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000059c080 RCX: 000000000047338d RDX: 0000000000000010 RSI: 0000000020002400 RDI: 0000000000000003 RBP: 00007fb6512c2c90 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000005 R13: 00007fffbb36285f R14: 00007fffbb362a00 R15: 00007fb6512c2dc0 Modules linked in: Dumping ftrace buffer: (ftrace buffer empty) CR2: ffffa73d01c96a40 ---[ end trace 3ef482cb4df9d746 ]--- RIP: 0010:memset_erms+0x9/0x10 arch/x86/lib/memset_64.S:64 Code: c1 e9 03 40 0f b6 f6 48 b8 01 01 01 01 01 01 01 01 48 0f af c6 f3 48 ab 89 d1 f3 aa 4c 89 c8 c3 90 49 89 f9 40 88 f0 48 89 d1 <f3> aa 4c 89 c8 c3 90 49 89 fa 40 0f b6 ce 48 b8 01 01 01 01 01 01 RSP: 0018:ffff9f3d01c9b930 EFLAGS: 00010082 RAX: ffffa73d01c96a00 RBX: 0000000000000020 RCX: 0000000000000020 RDX: 0000000000000020 RSI: 0000000000000000 RDI: ffffa73d01c96a40 RBP: ffff9f3d01c9b960 R08: ffffc2390000000f R09: ffffa73d01c96a40 R10: 000000007dee4e6b R11: ffffffffb2000782 R12: 0000000000000000 R13: 0000000000000020 R14: 0000000000000000 R15: ffff9f3d01c96a40 FS: 00007fb6512c3700(0000) GS:ffff97407fa00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffa73d01c96a40 CR3: 0000000030087005 CR4: 0000000000770ef0 PKRU: 55555554 [unhandled content-type:application/octet-stream] | |