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: 7350 Comm: syz.1.347 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:593 [inline] RIP: 0010:__mutex_lock+0x14b/0x1300 kernel/locking/mutex.c:776 Code: 80 c4 27 9a 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 e4 0f 00 00 83 3d f3 3e 77 0e 00 75 23 49 8d 7c 24 60 48 89 f8 48 c1 e8 03 <42> 80 3c 28 00 74 05 e8 c9 71 7f f6 4d 39 64 24 60 0f 85 10 0f 00 RSP: 0018:ffffc90004277260 EFLAGS: 00010202 RAX: 0000000000000019 RBX: 1ffff9200084ee64 RCX: ffffffff9a27c403 RDX: 0000000000000000 RSI: ffffffff8e16a649 RDI: 00000000000000c8 RBP: ffffc90004277418 R08: ffffc90004277387 R09: 0000000000000000 R10: ffffc90004277360 R11: fffff5200084ee71 R12: 0000000000000068 R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f017ce236c0(0000) GS:ffff88812555a000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00002000001f0030 CR3: 00000000758dc000 CR4: 00000000003526f0 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/0x2020 drivers/i2c/i2c-core-base.c:-1 i2c_transfer+0x1cc/0x2d0 drivers/i2c/i2c-core-base.c:2317 i2c_transfer_buffer_flags+0x10d/0x1a0 drivers/i2c/i2c-core-base.c:2345 i2c_master_send include/linux/i2c.h:109 [inline] i2cdev_write+0x113/0x1e0 drivers/i2c/i2c-dev.c:183 vfs_write+0x29a/0xb90 fs/read_write.c:686 ksys_pwrite64 fs/read_write.c:795 [inline] __do_sys_pwrite64 fs/read_write.c:803 [inline] __se_sys_pwrite64 fs/read_write.c:800 [inline] __x64_sys_pwrite64+0x199/0x230 fs/read_write.c:800 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f017bf9c799 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:00007f017ce23028 EFLAGS: 00000246 ORIG_RAX: 0000000000000012 RAX: ffffffffffffffda RBX: 00007f017c216180 RCX: 00007f017bf9c799 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000000000a RBP: 00007f017c032c99 R08: 0000000000000000 R09: 0000000000000000 R10: 000000000000026c R11: 0000000000000246 R12: 0000000000000000 R13: 00007f017c216218 R14: 00007f017c216180 R15: 00007f017c33fa48 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:593 [inline] RIP: 0010:__mutex_lock+0x14b/0x1300 kernel/locking/mutex.c:776 Code: 80 c4 27 9a 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 e4 0f 00 00 83 3d f3 3e 77 0e 00 75 23 49 8d 7c 24 60 48 89 f8 48 c1 e8 03 <42> 80 3c 28 00 74 05 e8 c9 71 7f f6 4d 39 64 24 60 0f 85 10 0f 00 RSP: 0018:ffffc90004277260 EFLAGS: 00010202 RAX: 0000000000000019 RBX: 1ffff9200084ee64 RCX: ffffffff9a27c403 RDX: 0000000000000000 RSI: ffffffff8e16a649 RDI: 00000000000000c8 RBP: ffffc90004277418 R08: ffffc90004277387 R09: 0000000000000000 R10: ffffc90004277360 R11: fffff5200084ee71 R12: 0000000000000068 R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f017ce236c0(0000) GS:ffff88812545a000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00002000002f9030 CR3: 00000000758dc000 CR4: 00000000003526f0 DR0: 0000000000000004 DR1: 0000000000000004 DR2: 0000000000000002 DR3: 0000000080000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 4 bytes skipped: 0: 48 c1 e8 03 shr $0x3,%rax 4: 42 0f b6 04 28 movzbl (%rax,%r13,1),%eax 9: 84 c0 test %al,%al b: 0f 85 e4 0f 00 00 jne 0xff5 11: 83 3d f3 3e 77 0e 00 cmpl $0x0,0xe773ef3(%rip) # 0xe773f0b 18: 75 23 jne 0x3d 1a: 49 8d 7c 24 60 lea 0x60(%r12),%rdi 1f: 48 89 f8 mov %rdi,%rax 22: 48 c1 e8 03 shr $0x3,%rax * 26: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) <-- trapping instruction 2b: 74 05 je 0x32 2d: e8 c9 71 7f f6 call 0xf67f71fb 32: 4d 39 64 24 60 cmp %r12,0x60(%r12) 37: 0f .byte 0xf 38: 85 10 test %edx,(%rax) 3a: 0f .byte 0xf