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: 13555 Comm: syz.6.2205 Not tainted 6.15.0-syzkaller-01972-g914873bc7df9 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:580 [inline] RIP: 0010:__mutex_lock+0x138/0xe80 kernel/locking/mutex.c:746 Code: 60 33 a4 99 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 0d 0c 00 00 83 3d d6 06 45 0e 00 75 23 49 8d 7c 24 60 48 89 f8 48 c1 e8 03 <42> 80 3c 28 00 74 05 e8 2c 88 c3 f6 4d 39 64 24 60 0f 85 7b 0b 00 RSP: 0018:ffffc90004677360 EFLAGS: 00010202 RAX: 0000000000000019 RBX: 0000000000000000 RCX: ffffffff99a43303 RDX: ffff888033f30000 RSI: ffffffff8db46571 RDI: 00000000000000c8 RBP: ffffc900046774f8 R08: ffffc90004677467 R09: 0000000000000000 R10: ffffc90004677440 R11: fffff520008cee8d R12: 0000000000000068 R13: dffffc0000000000 R14: ffff88805d264958 R15: 0000000000000000 FS: 00007fb5817d36c0(0000) GS:ffff888125d91000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000227030 CR3: 0000000045f7a000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: dvb_usbv2_generic_write+0x26/0x60 drivers/media/usb/dvb-usb-v2/dvb_usb_urb.c:77 mxl111sf_ctrl_msg+0x16a/0x2e0 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+0x874/0x2170 drivers/i2c/i2c-core-base.c:-1 i2c_transfer+0x25b/0x3a0 drivers/i2c/i2c-core-base.c:2315 i2cdev_ioctl_rdwr+0x460/0x740 drivers/i2c/i2c-dev.c:306 i2cdev_ioctl+0x64b/0x7f0 drivers/i2c/i2c-dev.c:467 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl+0xf9/0x170 fs/ioctl.c:893 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf6/0x220 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fb583d8e969 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:00007fb5817d3038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fb583fb6240 RCX: 00007fb583d8e969 RDX: 0000200000002580 RSI: 0000000000000707 RDI: 0000000000000004 RBP: 00007fb583e10ab1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fb583fb6240 R15: 00007fb5840dfa28 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:580 [inline] RIP: 0010:__mutex_lock+0x138/0xe80 kernel/locking/mutex.c:746 Code: 60 33 a4 99 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 0d 0c 00 00 83 3d d6 06 45 0e 00 75 23 49 8d 7c 24 60 48 89 f8 48 c1 e8 03 <42> 80 3c 28 00 74 05 e8 2c 88 c3 f6 4d 39 64 24 60 0f 85 7b 0b 00 RSP: 0018:ffffc90004677360 EFLAGS: 00010202 RAX: 0000000000000019 RBX: 0000000000000000 RCX: ffffffff99a43303 RDX: ffff888033f30000 RSI: ffffffff8db46571 RDI: 00000000000000c8 RBP: ffffc900046774f8 R08: ffffc90004677467 R09: 0000000000000000 R10: ffffc90004677440 R11: fffff520008cee8d R12: 0000000000000068 R13: dffffc0000000000 R14: ffff88805d264958 R15: 0000000000000000 FS: 00007fb5817d36c0(0000) GS:ffff888125c91000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000ce7000 CR3: 0000000045f7a000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 33 a4 99 48 c1 e8 03 xor 0x3e8c148(%rcx,%rbx,4),%esp 7: 42 0f b6 04 28 movzbl (%rax,%r13,1),%eax c: 84 c0 test %al,%al e: 0f 85 0d 0c 00 00 jne 0xc21 14: 83 3d d6 06 45 0e 00 cmpl $0x0,0xe4506d6(%rip) # 0xe4506f1 1b: 75 23 jne 0x40 1d: 49 8d 7c 24 60 lea 0x60(%r12),%rdi 22: 48 89 f8 mov %rdi,%rax 25: 48 c1 e8 03 shr $0x3,%rax * 29: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) <-- trapping instruction 2e: 74 05 je 0x35 30: e8 2c 88 c3 f6 call 0xf6c38861 35: 4d 39 64 24 60 cmp %r12,0x60(%r12) 3a: 0f .byte 0xf 3b: 85 7b 0b test %edi,0xb(%rbx)