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: 7863 Comm: syz.4.481 Not tainted 6.15.0-rc1-syzkaller-00246-g900241a5cc15 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:580 [inline] RIP: 0010:__mutex_lock+0x15d/0x10c0 kernel/locking/mutex.c:746 Code: c0 80 c6 73 9a 48 c1 e8 03 42 0f b6 04 38 84 c0 0f 85 07 0e 00 00 83 3d 40 aa 41 0e 00 75 21 49 8d 7e 60 48 89 f8 48 c1 e8 03 <42> 80 3c 38 00 74 05 e8 67 60 fb f5 4d 39 76 60 0f 85 81 0d 00 00 RSP: 0018:ffffc9000bc5eea0 EFLAGS: 00010202 RAX: 0000000000000019 RBX: ffffc9000bc5ef60 RCX: ffffffff9a73c603 RDX: ffff88802687da00 RSI: ffffffff8e4fd5dc RDI: 00000000000000c8 RBP: ffffc9000bc5f038 R08: ffffc9000bc5efa7 R09: 0000000000000000 R10: ffffc9000bc5ef80 R11: fffff5200178bdf5 R12: 0000000000000000 R13: ffffc9000bc5ef68 R14: 0000000000000068 R15: dffffc0000000000 FS: 00007f37459eb6c0(0000) GS:ffff888125096000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1d2e97c338 CR3: 000000005aaa0000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: dvb_usbv2_generic_write+0x26/0x50 drivers/media/usb/dvb-usb-v2/dvb_usb_urb.c:77 mxl111sf_ctrl_msg+0x172/0x2e0 drivers/media/usb/dvb-usb-v2/mxl111sf.c:73 mxl111sf_write_reg+0xda/0x1f0 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+0x923/0x8aa0 drivers/media/usb/dvb-usb-v2/mxl111sf-i2c.c:813 __i2c_transfer+0x859/0x2250 drivers/i2c/i2c-core-base.c:-1 i2c_transfer+0x2c2/0x430 drivers/i2c/i2c-core-base.c:2315 i2c_transfer_buffer_flags+0x182/0x260 drivers/i2c/i2c-core-base.c:2343 i2c_master_send include/linux/i2c.h:109 [inline] i2cdev_write+0x110/0x1b0 drivers/i2c/i2c-dev.c:183 do_loop_readv_writev fs/read_write.c:848 [inline] vfs_writev+0x5ba/0xbc0 fs/read_write.c:1057 do_writev+0x1b8/0x360 fs/read_write.c:1101 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f3744b8d169 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:00007f37459eb038 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 RAX: ffffffffffffffda RBX: 00007f3744da6160 RCX: 00007f3744b8d169 RDX: 0000000000000001 RSI: 0000200000000680 RDI: 000000000000000d RBP: 00007f3744c0e990 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f3744da6160 R15: 00007f3744ecfa28 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:580 [inline] RIP: 0010:__mutex_lock+0x15d/0x10c0 kernel/locking/mutex.c:746 Code: c0 80 c6 73 9a 48 c1 e8 03 42 0f b6 04 38 84 c0 0f 85 07 0e 00 00 83 3d 40 aa 41 0e 00 75 21 49 8d 7e 60 48 89 f8 48 c1 e8 03 <42> 80 3c 38 00 74 05 e8 67 60 fb f5 4d 39 76 60 0f 85 81 0d 00 00 RSP: 0018:ffffc9000bc5eea0 EFLAGS: 00010202 RAX: 0000000000000019 RBX: ffffc9000bc5ef60 RCX: ffffffff9a73c603 RDX: ffff88802687da00 RSI: ffffffff8e4fd5dc RDI: 00000000000000c8 RBP: ffffc9000bc5f038 R08: ffffc9000bc5efa7 R09: 0000000000000000 R10: ffffc9000bc5ef80 R11: fffff5200178bdf5 R12: 0000000000000000 R13: ffffc9000bc5ef68 R14: 0000000000000068 R15: dffffc0000000000 FS: 00007f37459eb6c0(0000) GS:ffff888124f96000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f37459c9f98 CR3: 000000005aaa0000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: c0 80 c6 73 9a 48 c1 rolb $0xc1,0x489a73c6(%rax) 7: e8 03 42 0f b6 call 0xb60f420f c: 04 38 add $0x38,%al e: 84 c0 test %al,%al 10: 0f 85 07 0e 00 00 jne 0xe1d 16: 83 3d 40 aa 41 0e 00 cmpl $0x0,0xe41aa40(%rip) # 0xe41aa5d 1d: 75 21 jne 0x40 1f: 49 8d 7e 60 lea 0x60(%r14),%rdi 23: 48 89 f8 mov %rdi,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 38 00 cmpb $0x0,(%rax,%r15,1) <-- trapping instruction 2f: 74 05 je 0x36 31: e8 67 60 fb f5 call 0xf5fb609d 36: 4d 39 76 60 cmp %r14,0x60(%r14) 3a: 0f 85 81 0d 00 00 jne 0xdc1