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================================================================== BUG: KCSAN: data-race in do_signal_stop / handle_userfault write to 0xffff8880ad886090 of 8 bytes by task 2038 on cpu 1: handle_userfault+0x879/0xfa0 fs/userfaultfd.c:548 do_anonymous_page mm/memory.c:3352 [inline] handle_pte_fault mm/memory.c:4213 [inline] __handle_mm_fault+0x1f32/0x2da0 mm/memory.c:4345 handle_mm_fault+0x21c/0x540 mm/memory.c:4382 do_user_addr_fault arch/x86/mm/fault.c:1464 [inline] do_page_fault+0x48a/0xa96 arch/x86/mm/fault.c:1535 page_fault+0x34/0x40 arch/x86/entry/entry_64.S:1203 copy_user_generic_unrolled+0x86/0xc0 arch/x86/lib/copy_user_64.S:89 copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline] raw_copy_from_user arch/x86/include/asm/uaccess_64.h:68 [inline] _copy_from_user+0x92/0xf0 lib/usercopy.c:15 copy_from_user include/linux/uaccess.h:144 [inline] sctp_getsockopt_assoc_stats+0x8e/0x4b0 net/sctp/socket.c:7322 sctp_getsockopt net/sctp/socket.c:8180 [inline] sctp_getsockopt+0x29f9/0x5252 net/sctp/socket.c:8023 sock_common_getsockopt+0x5d/0x80 net/core/sock.c:3131 __sys_getsockopt+0xed/0x210 net/socket.c:2177 __do_sys_getsockopt net/socket.c:2192 [inline] __se_sys_getsockopt net/socket.c:2189 [inline] __x64_sys_getsockopt+0x6b/0x80 net/socket.c:2189 do_syscall_64+0xc7/0x3b0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff8880ad886090 of 8 bytes by task 2036 on cpu 0: do_signal_stop+0x3cc/0x4e0 kernel/signal.c:2353 get_signal+0x601/0x1290 kernel/signal.c:2699 do_signal+0x2b/0x840 arch/x86/kernel/signal.c:784 exit_to_usermode_loop+0x24a/0x2c0 arch/x86/entry/common.c:161 prepare_exit_to_usermode arch/x86/entry/common.c:196 [inline] syscall_return_slowpath arch/x86/entry/common.c:279 [inline] do_syscall_64+0x38b/0x3b0 arch/x86/entry/common.c:305 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 2036 Comm: syz-executor.4 Not tainted 5.7.0-rc1-syzkaller #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 |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2020/06/12 06:50 | https://github.com/google/ktsan.git kcsan | 7c3cd68e5d38 | 819b58b0 | .config | console log | report | ci2-upstream-kcsan-gce | |||||
2020/06/08 23:31 | https://github.com/google/ktsan.git kcsan | 7c3cd68e5d38 | 0d60b78a | .config | console log | report | ci2-upstream-kcsan-gce | |||||
2020/05/30 02:52 | https://github.com/google/ktsan.git kcsan | 7c3cd68e5d38 | 954bd312 | .config | console log | report | ci2-upstream-kcsan-gce | |||||
2020/05/25 04:59 | https://github.com/google/ktsan.git kcsan | 7c3cd68e5d38 | 11284182 | .config | console log | report | ci2-upstream-kcsan-gce | |||||
2020/05/20 10:36 | https://github.com/google/ktsan.git kcsan | 7c3cd68e5d38 | 1255f02a | .config | console log | report | ci2-upstream-kcsan-gce | |||||
2020/05/16 02:41 | https://github.com/google/ktsan.git kcsan | 7c3cd68e5d38 | 37bccd4e | .config | console log | report | ci2-upstream-kcsan-gce | |||||
2020/05/05 15:40 | https://github.com/google/ktsan.git kcsan | 7c3cd68e5d38 | 4b76dd25 | .config | console log | report | ci2-upstream-kcsan-gce | |||||
2020/05/02 00:14 | https://github.com/google/ktsan.git kcsan | 7c3cd68e5d38 | bc734e7a | .config | console log | report | ci2-upstream-kcsan-gce | |||||
2020/04/25 09:52 | https://github.com/google/ktsan.git kcsan | 7c3cd68e5d38 | a113ba38 | .config | console log | report | ci2-upstream-kcsan-gce | |||||
2020/04/21 00:23 | https://github.com/google/ktsan.git kcsan | 7c3cd68e5d38 | 98a9f9e6 | .config | console log | report | ci2-upstream-kcsan-gce | |||||
2020/04/16 16:04 | https://github.com/google/ktsan.git kcsan | 7c3cd68e5d38 | c743fcb3 | .config | console log | report | ci2-upstream-kcsan-gce | |||||
2020/04/16 15:56 | https://github.com/google/ktsan.git kcsan | 7c3cd68e5d38 | c743fcb3 | .config | console log | report | ci2-upstream-kcsan-gce |