KCSAN: data-race in mISDN_ioctl / mISDN

Kernel	Title	Rank 🛈	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in mISDN_ioctl / mISDN_read (3) net	6	1	309d	309d	0/29	auto-obsoleted due to no activity on 2025/06/22 00:42
upstream	KCSAN: data-race in mISDN_ioctl / mISDN_read (4) net	6	1	73d	45d	0/29	auto-obsoleted due to no activity on 2026/02/13 06:46
upstream	KCSAN: data-race in mISDN_ioctl / mISDN_read net	6	1	1468d	1468d	0/29	auto-closed as invalid on 2022/03/29 16:21

================================================================== BUG: KCSAN: data-race in mISDN_ioctl / mISDN_read read to 0xffff88813ad7a8c0 of 4 bytes by task 11832 on cpu 1: mISDN_read+0x128/0x4a0 drivers/isdn/mISDN/timerdev.c:108 vfs_read+0x1a1/0x6a0 fs/read_write.c:480 ksys_read+0xe8/0x1a0 fs/read_write.c:620 __do_sys_read fs/read_write.c:630 [inline] __se_sys_read fs/read_write.c:628 [inline] __x64_sys_read+0x3e/0x50 fs/read_write.c:628 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+0x46/0xb0 write to 0xffff88813ad7a8c0 of 4 bytes by task 11833 on cpu 0: misdn_add_timer drivers/isdn/mISDN/timerdev.c:175 [inline] mISDN_ioctl+0x2d9/0x590 drivers/isdn/mISDN/timerdev.c:233 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl+0xcb/0x140 fs/ioctl.c:856 __x64_sys_ioctl+0x3f/0x50 fs/ioctl.c:856 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+0x46/0xb0 value changed: 0x00000001 -> 0x00000000 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 11833 Comm: syz-executor.2 Not tainted 5.19.0-rc1-syzkaller-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================