Messages in this thread |  | | From | Wei Chen <> | Date | Sat, 17 Dec 2022 17:24:43 +0800 | Subject | WARNING in nla_get_range_unsigned |
| |
Dear Linux Developers,
Recently, when using our tool to fuzz kernel, the following crash was triggered. Although this crash has been reported by syzbot https://syzkaller.appspot.com/bug?id=32e20c07949c6d6006f26466022469e33ae69108 and fixed in commit netlink: policy: correct validation type check https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c30a3c957c885e618ddffc065f888be4f8d5a9bd, it still happens in the latest kernel version.
HEAD commit: 76dcd734eca git tree: linux-next compiler: clang 12.0.0 console output: https://drive.google.com/file/d/1reeOfFkfJp4-GUz_uMTh-uWXPLBJDcA6/view?usp=share_link kernel config: https://drive.google.com/file/d/1jH4qV5XblPADvMDUlvS7DwtW0FroMoVB/view?usp=share_link syz repro: https://drive.google.com/file/d/1Ong8vQn675RFU7R1O5HfiwWxp4UhnaIF/view?usp=share_link
IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: Wei Chen <harperchen1110@gmail.com>
------------[ cut here ]------------ WARNING: CPU: 0 PID: 17743 at lib/nlattr.c:118 nla_get_range_unsigned+0x1d8/0x1e0 lib/nlattr.c:117 Modules linked in: CPU: 0 PID: 17743 Comm: syz-executor.0 Not tainted 6.1.0-rc8 #3 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.13.0-48-gd9c812dda519-prebuilt.qemu.org 04/01/2014 RIP: 0010:nla_get_range_unsigned+0x1d8/0x1e0 lib/nlattr.c:117 Code: 8d ff 49 8b 75 08 ba 10 00 00 00 4c 89 f7 e8 0f d8 f8 02 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 0f 57 7a ff eb 05 e8 08 57 7a ff <0f> 0b e9 a9 fe ff ff 90 55 41 57 41 56 41 54 53 49 89 f6 49 89 fc RSP: 0018:ffffc90002df39b8 EFLAGS: 00010287 RAX: ffffffff81ad2f51 RBX: ffffffff85364d28 RCX: 0000000000040000 RDX: ffffc90000add000 RSI: 0000000000000268 RDI: 0000000000000269 RBP: 000000000000f940 R08: ffffffff81ad2dd8 R09: 0000000000000000 R10: 0001ffffffffffff R11: ffff888045136780 R12: ffff88803e174000 R13: ffffffff85364d20 R14: ffffc90002df3a30 R15: ffffffff85364d21 FS: 00007fab1e5c8700(0000) GS:ffff88807dc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000073f8d0 CR3: 000000004a789000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: <TASK> __netlink_policy_dump_write_attr+0x23d/0x990 net/netlink/policy.c:310 netlink_policy_dump_write_attr+0x22/0x30 net/netlink/policy.c:411 netlink_ack_tlv_fill net/netlink/af_netlink.c:2454 [inline] netlink_ack+0x546/0x760 net/netlink/af_netlink.c:2506 netlink_rcv_skb+0x1b7/0x240 net/netlink/af_netlink.c:2546 rtnetlink_rcv+0x18/0x20 net/core/rtnetlink.c:6109 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline] netlink_unicast+0x5e9/0x6b0 net/netlink/af_netlink.c:1345 netlink_sendmsg+0x739/0x860 net/netlink/af_netlink.c:1921 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg net/socket.c:734 [inline] ____sys_sendmsg+0x38f/0x500 net/socket.c:2482 ___sys_sendmsg net/socket.c:2536 [inline] __sys_sendmsg+0x197/0x230 net/socket.c:2565 __do_sys_sendmsg net/socket.c:2574 [inline] __se_sys_sendmsg net/socket.c:2572 [inline] __x64_sys_sendmsg+0x42/0x50 net/socket.c:2572 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x4697f9 Code: f7 d8 64 89 02 b8 ff ff ff ff c3 66 0f 1f 44 00 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fab1e5c7c48 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000077bf80 RCX: 00000000004697f9 RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000003 RBP: 00000000004d29e9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000077bf80 R13: 0000000000000000 R14: 000000000077bf80 R15: 00007ffd7c0e6920 </TASK> ---[ end trace 0000000000000000 ]---
Best, Wei
|  |