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================================================================== BUG: KCSAN: data-race in pcpu_alloc / pcpu_free_area write to 0xffffffff86043740 of 4 bytes by task 7306 on cpu 1: pcpu_update_empty_pages mm/percpu.c:575 [inline] pcpu_block_update_hint_free mm/percpu.c:1012 [inline] pcpu_free_area+0x448/0x6a0 mm/percpu.c:1267 free_percpu mm/percpu.c:1975 [inline] free_percpu+0x152/0x440 mm/percpu.c:1955 xt_percpu_counter_free+0x82/0xa0 net/netfilter/x_tables.c:1862 cleanup_entry+0x11b/0x150 net/ipv4/netfilter/ip_tables.c:655 __do_replace+0x426/0x500 net/ipv4/netfilter/ip_tables.c:1085 do_replace net/ipv4/netfilter/ip_tables.c:1140 [inline] do_ipt_set_ctl+0x26d/0x30b net/ipv4/netfilter/ip_tables.c:1672 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x6e/0xb0 net/netfilter/nf_sockopt.c:115 ip_setsockopt net/ipv4/ip_sockglue.c:1260 [inline] ip_setsockopt+0xed/0x100 net/ipv4/ip_sockglue.c:1240 tcp_setsockopt net/ipv4/tcp.c:3146 [inline] tcp_setsockopt+0x7c/0xc0 net/ipv4/tcp.c:3140 sock_common_setsockopt+0x67/0x90 net/core/sock.c:3139 __sys_setsockopt+0x1ce/0x370 net/socket.c:2084 __do_sys_setsockopt net/socket.c:2100 [inline] __se_sys_setsockopt net/socket.c:2097 [inline] __x64_sys_setsockopt+0x70/0x90 net/socket.c:2097 do_syscall_64+0xcf/0x2f0 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffffffff86043740 of 4 bytes by task 7301 on cpu 0: pcpu_alloc+0x3b0/0xcf0 mm/percpu.c:1729 __alloc_percpu+0x2e/0x40 mm/percpu.c:1796 xt_percpu_counter_alloc+0x105/0x130 net/netfilter/x_tables.c:1842 find_check_entry.isra.0+0x61/0x550 net/ipv4/netfilter/ip_tables.c:527 translate_table+0x762/0xc30 net/ipv4/netfilter/ip_tables.c:717 do_replace net/ipv4/netfilter/ip_tables.c:1136 [inline] do_ipt_set_ctl+0x219/0x30b net/ipv4/netfilter/ip_tables.c:1672 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x6e/0xb0 net/netfilter/nf_sockopt.c:115 ip_setsockopt net/ipv4/ip_sockglue.c:1260 [inline] ip_setsockopt+0xed/0x100 net/ipv4/ip_sockglue.c:1240 tcp_setsockopt net/ipv4/tcp.c:3146 [inline] tcp_setsockopt+0x7c/0xc0 net/ipv4/tcp.c:3140 sock_common_setsockopt+0x67/0x90 net/core/sock.c:3139 __sys_setsockopt+0x1ce/0x370 net/socket.c:2084 __do_sys_setsockopt net/socket.c:2100 [inline] __se_sys_setsockopt net/socket.c:2097 [inline] __x64_sys_setsockopt+0x70/0x90 net/socket.c:2097 do_syscall_64+0xcf/0x2f0 arch/x86/entry/common.c:296 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 7301 Comm: syz-executor.1 Not tainted 5.3.0+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2019/10/13 09:13 | https://github.com/google/ktsan.git kcsan | d724f94f63de | 2f661ec4 | .config | console log | report | ci2-upstream-kcsan-gce | |||||
2019/10/04 14:18 | https://github.com/google/ktsan.git kcsan | b4bd934316dc | c86336cf | .config | console log | report | ci2-upstream-kcsan-gce |