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================================================================== BUG: KCSAN: data-race in ondemand_readahead / ondemand_readahead write to 0xffff888104b60798 of 8 bytes by task 14188 on cpu 1: ondemand_readahead+0x2f8/0x780 mm/readahead.c:645 page_cache_sync_ra+0x1a4/0x1b0 mm/readahead.c:695 page_cache_sync_readahead include/linux/pagemap.h:1185 [inline] filemap_get_pages mm/filemap.c:2592 [inline] filemap_read+0x3e5/0x1400 mm/filemap.c:2679 generic_file_read_iter+0x72/0x320 mm/filemap.c:2825 call_read_iter include/linux/fs.h:2044 [inline] generic_file_splice_read+0x1de/0x2c0 fs/splice.c:311 do_splice_to fs/splice.c:796 [inline] splice_direct_to_actor+0x2ac/0x660 fs/splice.c:870 do_splice_direct+0xfb/0x180 fs/splice.c:979 do_sendfile+0x3ad/0x900 fs/read_write.c:1246 __do_sys_sendfile64 fs/read_write.c:1305 [inline] __se_sys_sendfile64 fs/read_write.c:1297 [inline] __x64_sys_sendfile64+0xb9/0x150 fs/read_write.c:1297 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffff888104b60798 of 8 bytes by task 14205 on cpu 0: ondemand_readahead+0x1fc/0x780 mm/readahead.c:580 page_cache_sync_ra+0x1a4/0x1b0 mm/readahead.c:695 page_cache_sync_readahead include/linux/pagemap.h:1185 [inline] filemap_get_pages mm/filemap.c:2592 [inline] filemap_read+0x3e5/0x1400 mm/filemap.c:2679 generic_file_read_iter+0x72/0x320 mm/filemap.c:2825 call_read_iter include/linux/fs.h:2044 [inline] generic_file_splice_read+0x1de/0x2c0 fs/splice.c:311 do_splice_to fs/splice.c:796 [inline] splice_direct_to_actor+0x2ac/0x660 fs/splice.c:870 do_splice_direct+0xfb/0x180 fs/splice.c:979 do_sendfile+0x3ad/0x900 fs/read_write.c:1246 __do_sys_sendfile64 fs/read_write.c:1311 [inline] __se_sys_sendfile64 fs/read_write.c:1297 [inline] __x64_sys_sendfile64+0x10c/0x150 fs/read_write.c:1297 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae value changed: 0x0000000000000005 -> 0x0000000000000006 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 14205 Comm: syz-executor.0 Not tainted 5.18.0-syzkaller-dirty #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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2022/05/23 21:19 | upstream | 4b0986a3613c | 4c7657cb | .config | console log | report | info | ci2-upstream-kcsan-gce | KCSAN: data-race in ondemand_readahead / ondemand_readahead |