Hello, syzbot found the following issue on: HEAD commit: 95d10484d66e Add linux-next specific files for 20220817 git tree: linux-next console+strace: https://syzkaller.appspot.com/x/log.txt?x=15133023080000 kernel config: https://syzkaller.appspot.com/x/.config?x=2f5fa747986be53a dashboard link: https://syzkaller.appspot.com/bug?extid=681bbbb80445ead3c040 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1100a92d080000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=123d1867080000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+681bbbb80445ead3c040@xxxxxxxxxxxxxxxxxxxxxxxxx general protection fault, probably for non-canonical address 0xdffffc0000000012: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000090-0x0000000000000097] CPU: 1 PID: 3607 Comm: syz-executor359 Not tainted 6.0.0-rc1-next-20220817-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 RIP: 0010:vma_is_shmem+0x21/0x40 mm/shmem.c:254 Code: 73 02 e9 20 fc ff ff 66 90 53 48 89 fb e8 07 2c cf ff 48 8d bb 90 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 10 48 81 bb 90 00 00 00 20 8f f7 89 5b 0f 94 c0 c3 RSP: 0018:ffffc900037cfb68 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000012 RSI: ffffffff81ace949 RDI: 0000000000000090 RBP: ffff888071b00720 R08: 0000000000000006 R09: 00000000000000e4 R10: 0000000000008001 R11: 0000000000000000 R12: 00000000000000e4 R13: ffff888071b00000 R14: dffffc0000000000 R15: 0000000000000000 FS: 0000555556ab5300(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa3c8f13260 CR3: 00000000718f5000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> io_pin_pages+0x25f/0x430 io_uring/rsrc.c:1207 io_sqe_buffer_register+0x14e/0x13b0 io_uring/rsrc.c:1254 io_sqe_buffers_register.cold+0x351/0x445 io_uring/rsrc.c:1346 __io_uring_register io_uring/io_uring.c:3711 [inline] __do_sys_io_uring_register+0x96d/0x1110 io_uring/io_uring.c:3878 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f548fcdfbb9 Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 00 00 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 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffc644b88f8 EFLAGS: 00000246 ORIG_RAX: 00000000000001ab RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f548fcdfbb9 RDX: 0000000020000080 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00007f548fca3d60 R08: 0000000010000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000246 R12: 00007f548fca3df0 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:vma_is_shmem+0x21/0x40 mm/shmem.c:254 Code: 73 02 e9 20 fc ff ff 66 90 53 48 89 fb e8 07 2c cf ff 48 8d bb 90 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 10 48 81 bb 90 00 00 00 20 8f f7 89 5b 0f 94 c0 c3 RSP: 0018:ffffc900037cfb68 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000012 RSI: ffffffff81ace949 RDI: 0000000000000090 RBP: ffff888071b00720 R08: 0000000000000006 R09: 00000000000000e4 R10: 0000000000008001 R11: 0000000000000000 R12: 00000000000000e4 R13: ffff888071b00000 R14: dffffc0000000000 R15: 0000000000000000 FS: 0000555556ab5300(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa3c8f13260 CR3: 00000000718f5000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 73 02 jae 0x4 2: e9 20 fc ff ff jmpq 0xfffffc27 7: 66 90 xchg %ax,%ax 9: 53 push %rbx a: 48 89 fb mov %rdi,%rbx d: e8 07 2c cf ff callq 0xffcf2c19 12: 48 8d bb 90 00 00 00 lea 0x90(%rbx),%rdi 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: 75 10 jne 0x40 30: 48 81 bb 90 00 00 00 cmpq $0xffffffff89f78f20,0x90(%rbx) 37: 20 8f f7 89 3b: 5b pop %rbx 3c: 0f 94 c0 sete %al 3f: c3 retq --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches
