KCSAN: data-race in sg_open / sg

ID	Workflow	Result	Correct	Bug	Created	Started	Finished	Revision	Error
fc987338-2a11-4222-b6cd-141474e4c4b5	assessment-kcsan	Benign: ✅	❓	KCSAN: data-race in sg_open / sg_open (2)	2026/01/09 17:05	2026/01/09 17:05	2026/01/09 17:27	7519916073b761ced56a7b15fdeeb4674e8dc125

Kernel	Title	Rank 🛈	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in sg_open / sg_open scsi	6				1	219d	219d	0/29	auto-obsoleted due to no activity on 2025/09/19 19:42

Kernel

Title

Rank 🛈

upstream

KCSAN: data-race in sg_open / sg_open scsi

219d

0/29

auto-obsoleted due to no activity on 2025/09/19 19:42

================================================================== BUG: KCSAN: data-race in sg_open / sg_open read-write to 0xffff8881026ae2a8 of 4 bytes by task 22050 on cpu 0: sg_open+0xb8e/0xc70 drivers/scsi/sg.c:355 chrdev_open+0x2eb/0x3a0 fs/char_dev.c:414 do_dentry_open+0x649/0xa20 fs/open.c:965 vfs_open+0x37/0x1e0 fs/open.c:1097 do_open fs/namei.c:3975 [inline] path_openat+0x1c5e/0x2170 fs/namei.c:4134 do_filp_open+0x109/0x230 fs/namei.c:4161 do_sys_openat2+0xa6/0x110 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_sys_openat fs/open.c:1468 [inline] __se_sys_openat fs/open.c:1463 [inline] __x64_sys_openat+0xf2/0x120 fs/open.c:1463 x64_sys_call+0x2eab/0x3000 arch/x86/include/generated/asm/syscalls_64.h:258 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xd2/0x200 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f read to 0xffff8881026ae2a8 of 4 bytes by task 22026 on cpu 1: open_wait drivers/scsi/sg.c:253 [inline] sg_open+0x608/0xc70 drivers/scsi/sg.c:334 chrdev_open+0x2eb/0x3a0 fs/char_dev.c:414 do_dentry_open+0x649/0xa20 fs/open.c:965 vfs_open+0x37/0x1e0 fs/open.c:1097 do_open fs/namei.c:3975 [inline] path_openat+0x1c5e/0x2170 fs/namei.c:4134 do_filp_open+0x109/0x230 fs/namei.c:4161 do_sys_openat2+0xa6/0x110 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_sys_openat fs/open.c:1468 [inline] __se_sys_openat fs/open.c:1463 [inline] __x64_sys_openat+0xf2/0x120 fs/open.c:1463 x64_sys_call+0x2eab/0x3000 arch/x86/include/generated/asm/syscalls_64.h:258 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xd2/0x200 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f value changed: 0x00000000 -> 0x00000001 Reported by Kernel Concurrency Sanitizer on: CPU: 1 UID: 0 PID: 22026 Comm: syz.6.6227 Tainted: G W syzkaller #0 PREEMPT(voluntary) Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 ==================================================================

Crashes (1):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2025/11/25 13:40	upstream	ac3fd01e4c1e	64219f15	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci2-upstream-kcsan-gce	KCSAN: data-race in sg_open / sg_open

Crashes (1):

Assets (help?)