Hello, syzbot found the following issue on:
HEAD commit: 4d48f589d294 Add linux-next specific files for 20221021 git tree: linux-next console+strace: https://syzkaller.appspot.com/x/log.txt?x=15e511ba880000 kernel config: https://syzkaller.appspot.com/x/.config?x=2c4b7d600a5739a6 dashboard link: https://syzkaller.appspot.com/bug?extid=da97a57c5b742d05db51 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=14e2fbe6880000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1146d66a880000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/0c86bd0b39a0/disk-4d48f589.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/074059d37f1f/vmlinux-4d48f589.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/1c147a66d1a0/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+da97a57c5b742d05d...@syzkaller.appspotmail.com loop0: detected capacity change from 0 to 264192 general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 0 PID: 3602 Comm: syz-executor230 Not tainted 6.1.0-rc1-next-20221021-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022 RIP: 0010:strnlen+0x3b/0x70 lib/string.c:430 Code: 74 3c 48 bb 00 00 00 00 00 fc ff df 49 89 fc 48 89 f8 eb 09 48 83 c0 01 48 39 e8 74 1e 48 89 c2 48 89 c1 48 c1 ea 03 83 e1 07 <0f> b6 14 1a 38 ca 7f 04 84 d2 75 11 80 38 00 75 d9 4c 29 e0 48 83 RSP: 0018:ffffc90003b6fb40 EFLAGS: 00010246 RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000040 RDI: 0000000000000000 RBP: 0000000000000040 R08: 0000000000000005 R09: 0000000000000017 R10: 0000000000000002 R11: 000000000008c001 R12: 0000000000000000 R13: 0000000000000000 R14: ffff8880217bf680 R15: ffff88807ccb24d0 FS: 0000555557389300(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000005d84c8 CR3: 0000000026706000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> strnlen include/linux/fortify-string.h:186 [inline] strscpy include/linux/fortify-string.h:331 [inline] gfs2_parse_param+0x1e6/0xe50 fs/gfs2/ops_fstype.c:1455 vfs_parse_fs_param fs/fs_context.c:148 [inline] vfs_parse_fs_param+0x1f9/0x3c0 fs/fs_context.c:129 vfs_parse_fs_string+0xdb/0x170 fs/fs_context.c:191 generic_parse_monolithic+0x16f/0x1f0 fs/fs_context.c:231 do_new_mount fs/namespace.c:3036 [inline] path_mount+0x12de/0x1e20 fs/namespace.c:3370 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount fs/namespace.c:3568 [inline] __x64_sys_mount+0x27f/0x300 fs/namespace.c:3568 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: 0033:0x7fdafa8bc4ba Code: 83 c4 08 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 49 89 ca b8 a5 00 00 00 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:00007ffe056c9ee8 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fdafa8bc4ba RDX: 0000000020000080 RSI: 00000000200000c0 RDI: 00007ffe056c9f00 RBP: 00007ffe056c9f00 R08: 00007ffe056c9f40 R09: 00005555573892c0 R10: 000000000180c082 R11: 0000000000000282 R12: 0000000000000004 R13: 00007ffe056c9f40 R14: 0000000000000002 R15: 0000000020000330 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:strnlen+0x3b/0x70 lib/string.c:430 Code: 74 3c 48 bb 00 00 00 00 00 fc ff df 49 89 fc 48 89 f8 eb 09 48 83 c0 01 48 39 e8 74 1e 48 89 c2 48 89 c1 48 c1 ea 03 83 e1 07 <0f> b6 14 1a 38 ca 7f 04 84 d2 75 11 80 38 00 75 d9 4c 29 e0 48 83 RSP: 0018:ffffc90003b6fb40 EFLAGS: 00010246 RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000040 RDI: 0000000000000000 RBP: 0000000000000040 R08: 0000000000000005 R09: 0000000000000017 R10: 0000000000000002 R11: 000000000008c001 R12: 0000000000000000 R13: 0000000000000000 R14: ffff8880217bf680 R15: ffff88807ccb24d0 FS: 0000555557389300(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000061ba0c CR3: 0000000026706000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 74 3c je 0x3e 2: 48 bb 00 00 00 00 00 movabs $0xdffffc0000000000,%rbx 9: fc ff df c: 49 89 fc mov %rdi,%r12 f: 48 89 f8 mov %rdi,%rax 12: eb 09 jmp 0x1d 14: 48 83 c0 01 add $0x1,%rax 18: 48 39 e8 cmp %rbp,%rax 1b: 74 1e je 0x3b 1d: 48 89 c2 mov %rax,%rdx 20: 48 89 c1 mov %rax,%rcx 23: 48 c1 ea 03 shr $0x3,%rdx 27: 83 e1 07 and $0x7,%ecx * 2a: 0f b6 14 1a movzbl (%rdx,%rbx,1),%edx <-- trapping instruction 2e: 38 ca cmp %cl,%dl 30: 7f 04 jg 0x36 32: 84 d2 test %dl,%dl 34: 75 11 jne 0x47 36: 80 38 00 cmpb $0x0,(%rax) 39: 75 d9 jne 0x14 3b: 4c 29 e0 sub %r12,%rax 3e: 48 rex.W 3f: 83 .byte 0x83 --- This report is generated by a bot. 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