general protection fault, probably for non-canonical address 0xdffffc000000020b: 0000 [#1] PREEMPT SMP KASAN KASAN: probably user-memory-access in range [0x0000000000001058-0x000000000000105f] CPU: 0 PID: 14083 Comm: syz-executor.2 Not tainted 6.6.0-syzkaller-14651-gd2f51b3516da #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 RIP: 0010:ptp_ioctl+0xcb7/0x1d10 drivers/ptp/ptp_chardev.c:476 Code: 81 fe 13 3d 00 00 0f 85 9c 02 00 00 e8 d2 73 22 fa 49 8d bc 24 58 10 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 dc 0e 00 00 49 8b bc 24 58 10 00 00 ba 00 01 00 RSP: 0018:ffffc900032efba0 EFLAGS: 00010212 RAX: dffffc0000000000 RBX: ffff88802501a000 RCX: ffffc9000a8ac000 RDX: 000000000000020b RSI: ffffffff876628ae RDI: 0000000000001058 RBP: ffffc900032efec0 R08: 0000000000000005 R09: ffffc900032efc40 R10: 0000000000003d13 R11: 0000000000000000 R12: 0000000000000000 R13: ffffc900032efc80 R14: 0000000000003d13 R15: ffffffff92ae4aa8 FS: 00007f20d1b096c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b31d22000 CR3: 000000007f7b3000 CR4: 0000000000350ef0 Call Trace: posix_clock_ioctl+0xf8/0x160 kernel/time/posix-clock.c:86 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:871 [inline] __se_sys_ioctl fs/ioctl.c:857 [inline] __x64_sys_ioctl+0x18f/0x210 fs/ioctl.c:857 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7f20d0e7cae9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f20d1b090c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f20d0f9bf80 RCX: 00007f20d0e7cae9 RDX: 0000000000000000 RSI: 0000000000003d13 RDI: 0000000000000003 RBP: 00007f20d0ec847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f20d0f9bf80 R15: 00007fffbaefab08 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:ptp_ioctl+0xcb7/0x1d10 drivers/ptp/ptp_chardev.c:476 Code: 81 fe 13 3d 00 00 0f 85 9c 02 00 00 e8 d2 73 22 fa 49 8d bc 24 58 10 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 dc 0e 00 00 49 8b bc 24 58 10 00 00 ba 00 01 00 RSP: 0018:ffffc900032efba0 EFLAGS: 00010212 RAX: dffffc0000000000 RBX: ffff88802501a000 RCX: ffffc9000a8ac000 RDX: 000000000000020b RSI: ffffffff876628ae RDI: 0000000000001058 RBP: ffffc900032efec0 R08: 0000000000000005 R09: ffffc900032efc40 R10: 0000000000003d13 R11: 0000000000000000 R12: 0000000000000000 R13: ffffc900032efc80 R14: 0000000000003d13 R15: ffffffff92ae4aa8 FS: 00007f20d1b096c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3e4b578038 CR3: 000000007f7b3000 CR4: 0000000000350ef0 ---------------- Code disassembly (best guess): 0: 81 fe 13 3d 00 00 cmp $0x3d13,%esi 6: 0f 85 9c 02 00 00 jne 0x2a8 c: e8 d2 73 22 fa call 0xfa2273e3 11: 49 8d bc 24 58 10 00 lea 0x1058(%r12),%rdi 18: 00 19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 20: fc ff df 23: 48 89 fa mov %rdi,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 0f 85 dc 0e 00 00 jne 0xf10 34: 49 8b bc 24 58 10 00 mov 0x1058(%r12),%rdi 3b: 00 3c: ba .byte 0xba 3d: 00 01 add %al,(%rcx)