Oops: general protection fault, probably for non-canonical address 0xdffffc0000000019: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x00000000000000c8-0x00000000000000cf] CPU: 1 UID: 0 PID: 6371 Comm: syz.3.20 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:577 [inline] RIP: 0010:__mutex_lock+0x141/0x1490 kernel/locking/mutex.c:760 Code: 00 b3 1f 99 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 5e 11 00 00 83 3d ad 30 15 0e 00 75 23 49 8d 7c 24 60 48 89 f8 48 c1 e8 03 <42> 80 3c 28 00 74 05 e8 53 e6 15 f7 4d 39 64 24 60 0f 85 96 10 00 RSP: 0018:ffffc90003cef080 EFLAGS: 00010202 RAX: 0000000000000019 RBX: ffffc90003cef180 RCX: ffffffff991fb303 RDX: ffff88802597dac0 RSI: ffffffff8d40b04d RDI: 00000000000000c8 RBP: ffffc90003cef238 R08: ffffc90003cef1a7 R09: 0000000000000000 R10: ffffc90003cef180 R11: fffff5200079de35 R12: 0000000000000068 R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007fc38b5ce6c0(0000) GS:ffff8881267d9000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2ed63fff CR3: 000000007e4f6000 CR4: 00000000003526f0 Call Trace: dvb_usbv2_generic_write+0x26/0x60 drivers/media/usb/dvb-usb-v2/dvb_usb_urb.c:77 mxl111sf_ctrl_msg+0x12e/0x260 drivers/media/usb/dvb-usb-v2/mxl111sf.c:73 mxl111sf_write_reg+0xa0/0x180 drivers/media/usb/dvb-usb-v2/mxl111sf.c:123 mxl111sf_i2c_start drivers/media/usb/dvb-usb-v2/mxl111sf-i2c.c:130 [inline] mxl111sf_i2c_sw_xfer_msg drivers/media/usb/dvb-usb-v2/mxl111sf-i2c.c:-1 [inline] mxl111sf_i2c_xfer+0x461/0x4f00 drivers/media/usb/dvb-usb-v2/mxl111sf-i2c.c:813 __i2c_transfer+0x870/0x2150 drivers/i2c/i2c-core-base.c:-1 i2c_smbus_xfer_emulated drivers/i2c/i2c-core-smbus.c:470 [inline] __i2c_smbus_xfer+0xfa8/0x1df0 drivers/i2c/i2c-core-smbus.c:608 i2c_smbus_xfer+0x275/0x3c0 drivers/i2c/i2c-core-smbus.c:546 i2cdev_ioctl_smbus+0x455/0x6f0 drivers/i2c/i2c-dev.c:389 i2cdev_ioctl+0x5d3/0x7f0 drivers/i2c/i2c-dev.c:478 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x8a/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x76/0x7e RIP: 0033:0x7fc38a78efc9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fc38b5ce038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fc38a9e5fa0 RCX: 00007fc38a78efc9 RDX: 00002000000001c0 RSI: 0000000000000720 RDI: 0000000000000003 RBP: 00007fc38a811f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fc38a9e6038 R14: 00007fc38a9e5fa0 R15: 00007ffdb077ea38 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:577 [inline] RIP: 0010:__mutex_lock+0x141/0x1490 kernel/locking/mutex.c:760 Code: 00 b3 1f 99 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 5e 11 00 00 83 3d ad 30 15 0e 00 75 23 49 8d 7c 24 60 48 89 f8 48 c1 e8 03 <42> 80 3c 28 00 74 05 e8 53 e6 15 f7 4d 39 64 24 60 0f 85 96 10 00 RSP: 0018:ffffc90003cef080 EFLAGS: 00010202 RAX: 0000000000000019 RBX: ffffc90003cef180 RCX: ffffffff991fb303 RDX: ffff88802597dac0 RSI: ffffffff8d40b04d RDI: 00000000000000c8 RBP: ffffc90003cef238 R08: ffffc90003cef1a7 R09: 0000000000000000 R10: ffffc90003cef180 R11: fffff5200079de35 R12: 0000000000000068 R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007fc38b5ce6c0(0000) GS:ffff8881267d9000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005555802cc808 CR3: 000000007e4f6000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess): 0: 00 b3 1f 99 48 c1 add %dh,-0x3eb766e1(%rbx) 6: e8 03 42 0f b6 call 0xb60f420e b: 04 28 add $0x28,%al d: 84 c0 test %al,%al f: 0f 85 5e 11 00 00 jne 0x1173 15: 83 3d ad 30 15 0e 00 cmpl $0x0,0xe1530ad(%rip) # 0xe1530c9 1c: 75 23 jne 0x41 1e: 49 8d 7c 24 60 lea 0x60(%r12),%rdi 23: 48 89 f8 mov %rdi,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) <-- trapping instruction 2f: 74 05 je 0x36 31: e8 53 e6 15 f7 call 0xf715e689 36: 4d 39 64 24 60 cmp %r12,0x60(%r12) 3b: 0f .byte 0xf 3c: 85 .byte 0x85 3d: 96 xchg %eax,%esi 3e: 10 00 adc %al,(%rax)