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================================================================== BUG: KCSAN: data-race in filemap_splice_read / ondemand_readahead write to 0xffff88814bbfd190 of 8 bytes by task 8795 on cpu 0: filemap_splice_read+0x5b4/0x7f0 mm/filemap.c:2915 ext4_file_splice_read+0x95/0xb0 fs/ext4/file.c:158 vfs_splice_read fs/splice.c:993 [inline] splice_direct_to_actor+0x28c/0x690 fs/splice.c:1069 do_splice_direct+0x10d/0x190 fs/splice.c:1194 do_sendfile+0x3c4/0x980 fs/read_write.c:1254 __do_sys_sendfile64 fs/read_write.c:1322 [inline] __se_sys_sendfile64 fs/read_write.c:1308 [inline] __x64_sys_sendfile64+0x110/0x150 fs/read_write.c:1308 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x44/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b read to 0xffff88814bbfd190 of 8 bytes by task 8794 on cpu 1: ondemand_readahead+0x59a/0x690 mm/readahead.c:625 page_cache_sync_ra+0x27e/0x2a0 mm/readahead.c:695 page_cache_sync_readahead include/linux/pagemap.h:1283 [inline] filemap_get_pages+0x251/0xf90 mm/filemap.c:2497 filemap_splice_read+0x238/0x7f0 mm/filemap.c:2869 ext4_file_splice_read+0x95/0xb0 fs/ext4/file.c:158 vfs_splice_read fs/splice.c:993 [inline] splice_direct_to_actor+0x28c/0x690 fs/splice.c:1069 do_splice_direct+0x10d/0x190 fs/splice.c:1194 do_sendfile+0x3c4/0x980 fs/read_write.c:1254 __do_sys_sendfile64 fs/read_write.c:1322 [inline] __se_sys_sendfile64 fs/read_write.c:1308 [inline] __x64_sys_sendfile64+0x110/0x150 fs/read_write.c:1308 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x44/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b value changed: 0x000000000026d000 -> 0x000000000025d000 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 8794 Comm: syz-executor.4 Not tainted 6.7.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 ==================================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2024/01/07 22:27 | upstream | 0dd3ee311255 | d0304e9c | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-kcsan-gce | KCSAN: data-race in filemap_splice_read / ondemand_readahead |