BUG: unable to handle kernel paging request in bcsp

Date	Name	Commit	Repro	Result
2025/04/28	upstream (ToT)	b4432656b36e	C	[report] BUG: unable to handle kernel paging request in bcsp_recv

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	general protection fault in bcsp_recv bluetooth	C	error		261	5h30m	91d	0/28	upstream: reported C repro on 2025/02/15 17:18

upstream

general protection fault in bcsp_recv bluetooth

error

261

5h30m

91d

0/28

upstream: reported C repro on 2025/02/15 17:18

Unable to handle kernel paging request at virtual address dfff800000000021 KASAN: null-ptr-deref in range [0x0000000000000108-0x000000000000010f] Mem abort info: ESR = 0x0000000096000006 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x06: level 2 translation fault Data abort info: ISV = 0, ISS = 0x00000006 CM = 0, WnR = 0 [dfff800000000021] address between user and kernel address ranges Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 4316 Comm: syz-executor505 Not tainted 6.1.135-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : bcsp_recv+0x9c/0x1164 drivers/bluetooth/hci_bcsp.c:590 lr : bcsp_recv+0x70/0x1164 drivers/bluetooth/hci_bcsp.c:589 sp : ffff800020717b20 x29: ffff800020717b70 x28: 000000000000017c x27: 0000000000000178 x26: 000000000000002f x25: dfff800000000000 x24: 0000000000000110 x23: 0000000000000021 x22: 0000000000000108 x21: ffff0000cefa05b8 x20: ffff800020717c40 x19: 0000000000000001 x18: 0000000000000000 x17: 0000000000000000 x16: ffff8000082d0758 x15: 0000000000000000 x14: 0000000080045440 x13: 1ffff00002a0e0b1 x12: 0000000000ff0100 x11: ff0080000eaebb8c x10: 0000000000000000 x9 : ffff0000d9d1d340 x8 : 0000000000000182 x7 : ffff80000eae73cc x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff8000131ed2a0 x2 : 0000000000000001 x1 : 0000000000000001 x0 : 0000000000000000 Call trace: bcsp_recv+0x9c/0x1164 drivers/bluetooth/hci_bcsp.c:-1 hci_uart_tty_receive+0x140/0x1d4 drivers/bluetooth/hci_ldisc.c:624 tiocsti+0x234/0x2d8 drivers/tty/tty_io.c:2288 tty_ioctl+0x35c/0xd8c drivers/tty/tty_io.c:2690 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:856 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 Code: d343ff7a f90017e8 a93e5fbb a93f73ba (38796ae8) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: d343ff7a lsr x26, x27, #3 4: f90017e8 str x8, [sp, #40] 8: a93e5fbb stp x27, x23, [x29, #-32] c: a93f73ba stp x26, x28, [x29, #-16] * 10: 38796ae8 ldrb w8, [x23, x25] <-- trapping instruction

Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2025/04/27 15:41	linux-6.1.y	535ec20c5027	c6b4fb39	.config	console log	report	syz / log	C		[disk image] [vmlinux] [kernel image]	ci2-linux-6-1-kasan-arm64	BUG: unable to handle kernel paging request in bcsp_recv
2025/04/27 15:08	linux-6.1.y	535ec20c5027	c6b4fb39	.config	console log	report	syz / log	C		[disk image] [vmlinux] [kernel image]	ci2-linux-6-1-kasan-arm64	BUG: unable to handle kernel paging request in bcsp_recv
2025/04/27 14:23	linux-6.1.y	535ec20c5027	c6b4fb39	.config	console log	report	syz / log	C		[disk image] [vmlinux] [kernel image]	ci2-linux-6-1-kasan-arm64	BUG: unable to handle kernel paging request in bcsp_recv
2025/05/17 23:03	linux-6.1.y	02b72ccb5f9d	f41472b0	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci2-linux-6-1-kasan-arm64	BUG: unable to handle kernel paging request in bcsp_recv
2025/05/16 04:51	linux-6.1.y	02b72ccb5f9d	cfde8269	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci2-linux-6-1-kasan-arm64	BUG: unable to handle kernel paging request in bcsp_recv
2025/05/16 04:47	linux-6.1.y	02b72ccb5f9d	cfde8269	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci2-linux-6-1-kasan-arm64	BUG: unable to handle kernel paging request in bcsp_recv
2025/05/16 04:25	linux-6.1.y	02b72ccb5f9d	cfde8269	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci2-linux-6-1-kasan-arm64	BUG: unable to handle kernel paging request in bcsp_recv
2025/05/04 06:36	linux-6.1.y	b6736e03756f	b0714e37	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci2-linux-6-1-kasan-arm64	BUG: unable to handle kernel paging request in bcsp_recv
2025/04/27 13:44	linux-6.1.y	535ec20c5027	c6b4fb39	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci2-linux-6-1-kasan-arm64	BUG: unable to handle kernel paging request in bcsp_recv