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打开KASAN选项对内核进行syzkaller模糊测试，出现 BUG: soft lockup in ip_set_type
Done
#I58CKN
Bug
zengxianjun
Opened this issue
2022-05-19 20:46
【测试步骤】 1、开启kasan选项后，执行syzkaller模糊测试，产生 BUG: soft lockup in ip_set_type告警 2、在未开启kasan的内核中执行syz-execprog复现程序遍历日志，问题复现 ``` [root@openEuler linux_arm64]# ./syz-execprog -repeat=0 -procs=16 log 2022/05/19 20:52:09 parsed 312 programs 2022/05/19 20:52:10 executed programs: 0 2022/05/19 20:52:19 executed programs: 312 Message from syslogd@openEuler at May 19 20:52:44 ... kernel:[193374.102796] watchdog: BUG: soft lockup - CPU#2 stuck for 22s! [syz-executor.1:14332] Message from syslogd@openEuler at May 19 20:53:08 ... kernel:[193398.102798] watchdog: BUG: soft lockup - CPU#2 stuck for 23s! [syz-executor.1:14332] Message from syslogd@openEuler at May 19 20:53:44 ... kernel:[193434.102797] watchdog: BUG: soft lockup - CPU#2 stuck for 22s! [syz-executor.1:14332] ``` [193482.141684] Call trace: [193482.142164] slabinfo_write+0x3e8/0xeac [193482.142842] skb_free_head+0x70/0x80 [193482.143482] skb_release_data+0xfc/0x1bc [193482.144325] kfree_skb+0x68/0x12c [193482.144950] netlink_attachskb+0xb8/0x220 [193482.145650] netlink_unicast+0xa0/0x194 [193482.146334] ip_set_type+0x1bc/0x490 [ip_set] [193482.147090] nfnetlink_rcv_msg+0x268/0x2d0 [nfnetlink] [193482.147967] netlink_rcv_skb+0x64/0x130 [193482.148814] nfnetlink_rcv+0xa0/0x19c [nfnetlink] [193482.149614] netlink_unicast_kernel+0x60/0x120 [193482.150379] netlink_unicast+0x110/0x194 [193482.151071] netlink_sendmsg+0x37c/0x420 [193482.151770] sock_sendmsg+0x48/0x70 [193482.152576] ____sys_sendmsg+0x274/0x2b0 [193482.153271] ___sys_sendmsg+0x84/0xd0 [193482.153923] __sys_sendmsg+0x70/0xd0 [193482.154568] __arm64_sys_sendmsg+0x2c/0x40 [193482.155300] el0_svc_common.constprop.0+0x7c/0x1bc [193482.156131] do_el0_svc+0x2c/0x94 [193482.156893] el0_svc+0x20/0x30 [193482.157459] el0_sync_handler+0xb0/0xb4 [193482.158150] el0_sync+0x160/0x180 【测试结果】 kasan内核日志产生ip_set_type相关的soft lockup告警并崩溃 【预期结果】 系统正常，内核日志无告警产生
【测试步骤】 1、开启kasan选项后，执行syzkaller模糊测试，产生 BUG: soft lockup in ip_set_type告警 2、在未开启kasan的内核中执行syz-execprog复现程序遍历日志，问题复现 ``` [root@openEuler linux_arm64]# ./syz-execprog -repeat=0 -procs=16 log 2022/05/19 20:52:09 parsed 312 programs 2022/05/19 20:52:10 executed programs: 0 2022/05/19 20:52:19 executed programs: 312 Message from syslogd@openEuler at May 19 20:52:44 ... kernel:[193374.102796] watchdog: BUG: soft lockup - CPU#2 stuck for 22s! [syz-executor.1:14332] Message from syslogd@openEuler at May 19 20:53:08 ... kernel:[193398.102798] watchdog: BUG: soft lockup - CPU#2 stuck for 23s! [syz-executor.1:14332] Message from syslogd@openEuler at May 19 20:53:44 ... kernel:[193434.102797] watchdog: BUG: soft lockup - CPU#2 stuck for 22s! [syz-executor.1:14332] ``` [193482.141684] Call trace: [193482.142164] slabinfo_write+0x3e8/0xeac [193482.142842] skb_free_head+0x70/0x80 [193482.143482] skb_release_data+0xfc/0x1bc [193482.144325] kfree_skb+0x68/0x12c [193482.144950] netlink_attachskb+0xb8/0x220 [193482.145650] netlink_unicast+0xa0/0x194 [193482.146334] ip_set_type+0x1bc/0x490 [ip_set] [193482.147090] nfnetlink_rcv_msg+0x268/0x2d0 [nfnetlink] [193482.147967] netlink_rcv_skb+0x64/0x130 [193482.148814] nfnetlink_rcv+0xa0/0x19c [nfnetlink] [193482.149614] netlink_unicast_kernel+0x60/0x120 [193482.150379] netlink_unicast+0x110/0x194 [193482.151071] netlink_sendmsg+0x37c/0x420 [193482.151770] sock_sendmsg+0x48/0x70 [193482.152576] ____sys_sendmsg+0x274/0x2b0 [193482.153271] ___sys_sendmsg+0x84/0xd0 [193482.153923] __sys_sendmsg+0x70/0xd0 [193482.154568] __arm64_sys_sendmsg+0x2c/0x40 [193482.155300] el0_svc_common.constprop.0+0x7c/0x1bc [193482.156131] do_el0_svc+0x2c/0x94 [193482.156893] el0_svc+0x20/0x30 [193482.157459] el0_sync_handler+0xb0/0xb4 [193482.158150] el0_sync+0x160/0x180 【测试结果】 kasan内核日志产生ip_set_type相关的soft lockup告警并崩溃 【预期结果】 系统正常，内核日志无告警产生
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