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================================================================== BUG: KCSAN: data-race in filemap_fault / generic_write_end read to 0xffff888128d073b8 of 8 bytes by task 18284 on cpu 1: filemap_fault+0x62d/0x10a0 mm/filemap.c:2552 ext4_filemap_fault+0x59/0x72 fs/ext4/inode.c:5977 __do_fault+0xae/0x1f0 mm/memory.c:3188 do_cow_fault mm/memory.c:3614 [inline] do_fault mm/memory.c:3716 [inline] handle_pte_fault mm/memory.c:3945 [inline] __handle_mm_fault+0xe63/0x2e00 mm/memory.c:4075 handle_mm_fault+0x21b/0x530 mm/memory.c:4112 faultin_page mm/gup.c:640 [inline] __get_user_pages+0x485/0x1130 mm/gup.c:851 populate_vma_page_range+0xe6/0x100 mm/gup.c:1235 __mm_populate+0x168/0x2a0 mm/gup.c:1283 mm_populate include/linux/mm.h:2347 [inline] vm_mmap_pgoff+0x181/0x190 mm/util.c:511 ksys_mmap_pgoff+0x2d8/0x420 mm/mmap.c:1607 __do_sys_mmap arch/x86/kernel/sys_x86_64.c:100 [inline] __se_sys_mmap arch/x86/kernel/sys_x86_64.c:91 [inline] __x64_sys_mmap+0x2e/0x40 arch/x86/kernel/sys_x86_64.c:91 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x44/0xa9 write to 0xffff888128d073b8 of 8 bytes by task 18277 on cpu 0: i_size_write include/linux/fs.h:888 [inline] generic_write_end+0xd0/0x1f0 fs/buffer.c:2183 ext4_da_write_end+0x158/0x620 fs/ext4/inode.c:3091 generic_perform_write+0x1d3/0x320 mm/filemap.c:3320 ext4_buffered_write_iter+0x143/0x290 fs/ext4/file.c:252 ext4_file_write_iter+0xf4/0xd40 fs/ext4/file.c:547 call_write_iter include/linux/fs.h:1902 [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/0x3a0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 18277 Comm: syz-executor.1 Not tainted 5.5.0-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 |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2020/02/01 22:58 | https://github.com/google/ktsan.git kcsan | 245a43005292 | 2274ad39 | .config | console log | report | ci2-upstream-kcsan-gce |