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================================================================== BUG: KCSAN: data-race in __tcp_transmit_skb / tcp_delack_timer write to 0xffff888122b8f70b of 1 bytes by interrupt on cpu 0: tcp_delack_timer+0xb5/0x140 net/ipv4/tcp_timer.c:328 call_timer_fn+0x5f/0x2f0 kernel/time/timer.c:1404 expire_timers kernel/time/timer.c:1449 [inline] __run_timers kernel/time/timer.c:1773 [inline] __run_timers kernel/time/timer.c:1740 [inline] run_timer_softirq+0xc0c/0xcd0 kernel/time/timer.c:1786 __do_softirq+0x115/0x33f kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0xbb/0xe0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0xe6/0x280 arch/x86/kernel/apic/apic.c:1137 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830 arch_local_irq_restore arch/x86/include/asm/paravirt.h:756 [inline] kcsan_setup_watchpoint+0x205/0x410 kernel/kcsan/core.c:369 check_access kernel/kcsan/core.c:409 [inline] __tsan_read2+0x145/0x1f0 kernel/kcsan/core.c:528 tomoyo_domain_quota_is_ok+0x29c/0x2b0 security/tomoyo/util.c:1039 tomoyo_supervisor+0x22b/0xd20 security/tomoyo/common.c:2087 tomoyo_audit_path_log security/tomoyo/file.c:168 [inline] tomoyo_path_permission security/tomoyo/file.c:587 [inline] tomoyo_path_permission+0x121/0x160 security/tomoyo/file.c:573 tomoyo_path_perm+0x23e/0x390 security/tomoyo/file.c:838 tomoyo_inode_getattr+0x26/0x40 security/tomoyo/tomoyo.c:129 security_inode_getattr+0x9b/0xd0 security/security.c:1222 vfs_getattr+0x2e/0x70 fs/stat.c:115 vfs_statx_fd+0x7a/0xd0 fs/stat.c:145 vfs_fstat include/linux/fs.h:3258 [inline] __do_sys_newfstat+0x49/0xa0 fs/stat.c:378 __se_sys_newfstat fs/stat.c:375 [inline] __x64_sys_newfstat+0x3a/0x50 fs/stat.c:375 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 write to 0xffff888122b8f70b of 1 bytes by task 8123 on cpu 1: inet_csk_clear_xmit_timer include/net/inet_connection_sock.h:205 [inline] tcp_event_ack_sent net/ipv4/tcp_output.c:194 [inline] __tcp_transmit_skb+0xb7e/0x1d60 net/ipv4/tcp_output.c:1144 tcp_transmit_skb net/ipv4/tcp_output.c:1185 [inline] tcp_write_xmit+0xa54/0x3120 net/ipv4/tcp_output.c:2440 __tcp_push_pending_frames+0x7b/0x1d0 net/ipv4/tcp_output.c:2616 tcp_push+0x1e9/0x3d0 net/ipv4/tcp.c:726 tcp_sendmsg_locked+0x1d2b/0x1fb0 net/ipv4/tcp.c:1405 tcp_sendmsg+0x39/0x60 net/ipv4/tcp.c:1436 inet_sendmsg+0x6d/0x90 net/ipv4/af_inet.c:807 sock_sendmsg_nosec net/socket.c:637 [inline] sock_sendmsg+0x9f/0xc0 net/socket.c:657 sock_write_iter+0x16b/0x210 net/socket.c:989 call_write_iter include/linux/fs.h:1895 [inline] new_sync_write+0x388/0x4a0 fs/read_write.c:483 __vfs_write+0xb1/0xc0 fs/read_write.c:496 vfs_write fs/read_write.c:558 [inline] vfs_write+0x18a/0x390 fs/read_write.c:542 ksys_write+0xd5/0x1b0 fs/read_write.c:611 __do_sys_write fs/read_write.c:623 [inline] __se_sys_write fs/read_write.c:620 [inline] __x64_sys_write+0x4c/0x60 fs/read_write.c:620 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 8123 Comm: syz-fuzzer Not tainted 5.4.0-rc6+ #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 |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2019/11/08 07:50 | https://github.com/google/ktsan.git kcsan | 94c006602e13 | 1e35461e | .config | console log | report | ci2-upstream-kcsan-gce | |||||
2019/10/31 12:32 | https://github.com/google/ktsan.git kcsan | 05f2236801fe | a41ca8fa | .config | console log | report | ci2-upstream-kcsan-gce |