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================================================================== BUG: KCSAN: data-race in ext4_page_mkwrite / ext4_write_end write to 0xffff888105fa5b48 of 8 bytes by task 16192 on cpu 1: i_size_write include/linux/fs.h:916 [inline] ext4_update_inode_size fs/ext4/ext4.h:3421 [inline] ext4_write_end+0x1be/0x800 fs/ext4/inode.c:1311 ext4_da_write_end+0x93/0x730 fs/ext4/inode.c:3085 generic_perform_write+0x251/0x3e0 mm/filemap.c:3781 ext4_buffered_write_iter+0x309/0x400 fs/ext4/file.c:269 ext4_file_write_iter+0x2f4/0x11f0 call_write_iter include/linux/fs.h:2163 [inline] aio_write+0x2b1/0x380 fs/aio.c:1578 io_submit_one+0x86f/0x13b0 fs/aio.c:1880 __do_sys_io_submit fs/aio.c:1939 [inline] __se_sys_io_submit+0x105/0x270 fs/aio.c:1909 __x64_sys_io_submit+0x3f/0x50 fs/aio.c:1909 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffff888105fa5b48 of 8 bytes by task 16207 on cpu 0: i_size_read include/linux/fs.h:894 [inline] ext4_page_mkwrite+0x5f6/0xec0 fs/ext4/inode.c:6113 do_page_mkwrite mm/memory.c:2870 [inline] wp_page_shared mm/memory.c:3203 [inline] do_wp_page+0x86c/0xba0 mm/memory.c:3304 handle_pte_fault mm/memory.c:4576 [inline] __handle_mm_fault mm/memory.c:4693 [inline] handle_mm_fault+0x96e/0x1580 mm/memory.c:4791 do_user_addr_fault+0x609/0xbe0 arch/x86/mm/fault.c:1390 handle_page_fault arch/x86/mm/fault.c:1475 [inline] exc_page_fault+0x91/0x220 arch/x86/mm/fault.c:1531 asm_exc_page_fault+0x1e/0x30 __put_user_nocheck_8+0x3/0x21 __do_sys_io_setup fs/aio.c:1331 [inline] __se_sys_io_setup+0x91/0x1a0 fs/aio.c:1311 __x64_sys_io_setup+0x2d/0x40 fs/aio.c:1311 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae value changed: 0x00000000024df000 -> 0x00000000024e0000 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 16207 Comm: syz-executor.1 Not tainted 5.15.0-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 |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2021/09/15 21:56 | upstream | 80be5998ad63 | 07e953c1 | .config | console log | report | info | ci2-upstream-kcsan-gce | KCSAN: data-race in ext4_page_mkwrite / ext4_write_end |