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================================================================== BUG: KCSAN: data-race in shmem_file_read_iter / shmem_setattr write to 0xffff88813f7959e8 of 8 bytes by task 28293 on cpu 1: i_size_write include/linux/fs.h:886 [inline] shmem_setattr+0x372/0x490 mm/shmem.c:1112 notify_change+0xa5c/0xad0 fs/attr.c:482 do_truncate+0xfa/0x140 fs/open.c:65 do_sys_ftruncate+0x28a/0x380 fs/open.c:193 __do_sys_ftruncate fs/open.c:204 [inline] __se_sys_ftruncate fs/open.c:202 [inline] __x64_sys_ftruncate+0x2f/0x40 fs/open.c:202 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+0x63/0xcd read to 0xffff88813f7959e8 of 8 bytes by task 28292 on cpu 0: i_size_read include/linux/fs.h:864 [inline] shmem_file_read_iter+0x440/0x580 mm/shmem.c:2616 call_read_iter include/linux/fs.h:2180 [inline] generic_file_splice_read+0xde/0x2b0 fs/splice.c:309 do_splice_to fs/splice.c:793 [inline] splice_direct_to_actor+0x26c/0x620 fs/splice.c:865 do_splice_direct+0xfb/0x180 fs/splice.c:974 do_sendfile+0x3bf/0x910 fs/read_write.c:1255 __do_sys_sendfile64 fs/read_write.c:1323 [inline] __se_sys_sendfile64 fs/read_write.c:1309 [inline] __x64_sys_sendfile64+0x10c/0x150 fs/read_write.c:1309 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+0x63/0xcd value changed: 0x0000000001000000 -> 0x0000000000000086 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 28292 Comm: syz-executor.5 Not tainted 6.2.0-rc1-syzkaller-00095-ge4cf7c25bae5-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 ==================================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2023/01/02 04:31 | upstream | e4cf7c25bae5 | ab32d508 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-kcsan-gce | KCSAN: data-race in shmem_file_read_iter / shmem_setattr | ||
2022/12/09 14:32 | upstream | 0d1409e4ff08 | 67be1ae7 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-kcsan-gce | KCSAN: data-race in shmem_file_read_iter / shmem_setattr |