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================================================================== BUG: KCSAN: data-race in ondemand_readahead / read_pages read to 0xffff88813fa22784 of 4 bytes by task 21730 on cpu 1: ondemand_readahead+0x158/0x670 mm/readahead.c:578 page_cache_sync_ra+0x27e/0x2a0 mm/readahead.c:693 page_cache_sync_readahead include/linux/pagemap.h:1300 [inline] filemap_get_pages+0x251/0xf90 mm/filemap.c:2498 filemap_read+0x214/0x680 mm/filemap.c:2594 generic_file_read_iter+0x78/0x330 mm/filemap.c:2784 ext4_file_read_iter+0x1d8/0x2a0 call_read_iter include/linux/fs.h:2079 [inline] copy_splice_read+0x39f/0x5d0 fs/splice.c:365 do_splice_read fs/splice.c:984 [inline] splice_direct_to_actor+0x288/0x660 fs/splice.c:1089 do_splice_direct_actor fs/splice.c:1207 [inline] do_splice_direct+0xd7/0x150 fs/splice.c:1233 do_sendfile+0x3b9/0x960 fs/read_write.c:1295 __do_sys_sendfile64 fs/read_write.c:1362 [inline] __se_sys_sendfile64 fs/read_write.c:1348 [inline] __x64_sys_sendfile64+0x110/0x150 fs/read_write.c:1348 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x1d0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b write to 0xffff88813fa22784 of 4 bytes by task 21731 on cpu 0: read_pages+0x284/0x540 mm/readahead.c:172 page_cache_ra_unbounded+0x2aa/0x2e0 mm/readahead.c:269 do_page_cache_ra mm/readahead.c:299 [inline] page_cache_ra_order mm/readahead.c:544 [inline] ondemand_readahead+0x50b/0x670 mm/readahead.c:666 page_cache_async_ra+0x94/0xa0 mm/readahead.c:715 filemap_readahead mm/filemap.c:2473 [inline] filemap_get_pages+0x397/0xf90 mm/filemap.c:2514 filemap_read+0x214/0x680 mm/filemap.c:2594 generic_file_read_iter+0x78/0x330 mm/filemap.c:2784 ext4_file_read_iter+0x1d8/0x2a0 call_read_iter include/linux/fs.h:2079 [inline] copy_splice_read+0x39f/0x5d0 fs/splice.c:365 do_splice_read fs/splice.c:984 [inline] splice_direct_to_actor+0x288/0x660 fs/splice.c:1089 do_splice_direct_actor fs/splice.c:1207 [inline] do_splice_direct+0xd7/0x150 fs/splice.c:1233 do_sendfile+0x3b9/0x960 fs/read_write.c:1295 __do_sys_sendfile64 fs/read_write.c:1362 [inline] __se_sys_sendfile64 fs/read_write.c:1348 [inline] __x64_sys_sendfile64+0x110/0x150 fs/read_write.c:1348 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x1d0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b value changed: 0x00000009 -> 0x00000001 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 21731 Comm: syz-executor.4 Not tainted 6.8.0-rc4-syzkaller-00331-gc1ca10ceffbb #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 ==================================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2024/02/17 09:54 | upstream | c1ca10ceffbb | 578f7538 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-kcsan-gce | KCSAN: data-race in ondemand_readahead / read_pages |