Oops: general protection fault, probably for non-canonical address 0xdffffc0000000018: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x00000000000000c0-0x00000000000000c7] CPU: 0 UID: 0 PID: 15111 Comm: syz.2.2693 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:625 [inline] RIP: 0010:__mutex_lock+0x14e/0x1550 kernel/locking/mutex.c:820 Code: e0 33 44 9a 48 c1 e8 03 42 0f b6 04 30 84 c0 0f 85 40 12 00 00 83 3d b0 e9 9a 0e 00 75 23 49 8d 7c 24 58 48 89 f8 48 c1 e8 03 <42> 80 3c 30 00 74 05 e8 66 9c 87 f6 4d 39 64 24 58 0f 85 6c 11 00 RSP: 0018:ffffc90003287420 EFLAGS: 00010206 RAX: 0000000000000018 RBX: 0000000000000000 RCX: ffffffff9a443303 RDX: 0000000000000000 RSI: ffffffff8e2172f1 RDI: 00000000000000c0 RBP: ffffc900032875d8 R08: ffffc90003287547 R09: 0000000000000000 R10: ffffc90003287520 R11: fffff52000650ea9 R12: 0000000000000068 R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92000650e9c FS: 00007f20d1ffa6c0(0000) GS:ffff888125293000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c349f9d CR3: 0000000045ca0000 CR4: 00000000003526f0 DR0: 0000000080000000 DR1: 0000000000000001 DR2: fffffffffffffffe DR3: 0000000000000009 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Call Trace: dvb_usbv2_generic_write+0x26/0x60 drivers/media/usb/dvb-usb-v2/dvb_usb_urb.c:77 mxl111sf_ctrl_msg+0x160/0x2f0 drivers/media/usb/dvb-usb-v2/mxl111sf.c:73 mxl111sf_write_reg+0xa9/0x1b0 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+0x496/0x5100 drivers/media/usb/dvb-usb-v2/mxl111sf-i2c.c:813 __i2c_transfer+0x79a/0x1f70 drivers/i2c/i2c-core-base.c:-1 i2c_transfer+0x1cc/0x2d0 drivers/i2c/i2c-core-base.c:2317 i2cdev_ioctl_rdwr+0x460/0x740 drivers/i2c/i2c-dev.c:306 i2cdev_ioctl+0x6a5/0x880 drivers/i2c/i2c-dev.c:467 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+0x15f/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f20d119cdd9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f20d1ffa028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f20d1415fa0 RCX: 00007f20d119cdd9 RDX: 0000200000000140 RSI: 0000000000000707 RDI: 0000000000000006 RBP: 00007f20d1232d69 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f20d1416038 R14: 00007f20d1415fa0 R15: 00007f20d153fa48 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:625 [inline] RIP: 0010:__mutex_lock+0x14e/0x1550 kernel/locking/mutex.c:820 Code: e0 33 44 9a 48 c1 e8 03 42 0f b6 04 30 84 c0 0f 85 40 12 00 00 83 3d b0 e9 9a 0e 00 75 23 49 8d 7c 24 58 48 89 f8 48 c1 e8 03 <42> 80 3c 30 00 74 05 e8 66 9c 87 f6 4d 39 64 24 58 0f 85 6c 11 00 RSP: 0018:ffffc90003287420 EFLAGS: 00010206 RAX: 0000000000000018 RBX: 0000000000000000 RCX: ffffffff9a443303 RDX: 0000000000000000 RSI: ffffffff8e2172f1 RDI: 00000000000000c0 RBP: ffffc900032875d8 R08: ffffc90003287547 R09: 0000000000000000 R10: ffffc90003287520 R11: fffff52000650ea9 R12: 0000000000000068 R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92000650e9c FS: 00007f20d1ffa6c0(0000) GS:ffff888125393000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f282c7ea2f8 CR3: 0000000045ca0000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess): 0: e0 33 loopne 0x35 2: 44 9a rex.R (bad) 4: 48 c1 e8 03 shr $0x3,%rax 8: 42 0f b6 04 30 movzbl (%rax,%r14,1),%eax d: 84 c0 test %al,%al f: 0f 85 40 12 00 00 jne 0x1255 15: 83 3d b0 e9 9a 0e 00 cmpl $0x0,0xe9ae9b0(%rip) # 0xe9ae9cc 1c: 75 23 jne 0x41 1e: 49 8d 7c 24 58 lea 0x58(%r12),%rdi 23: 48 89 f8 mov %rdi,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 30 00 cmpb $0x0,(%rax,%r14,1) <-- trapping instruction 2f: 74 05 je 0x36 31: e8 66 9c 87 f6 call 0xf6879c9c 36: 4d 39 64 24 58 cmp %r12,0x58(%r12) 3b: 0f .byte 0xf 3c: 85 6c 11 00 test %ebp,0x0(%rcx,%rdx,1)