loop0: detected capacity change from 0 to 64
detected buffer overflow in strnlen
------------[ cut here ]------------
kernel BUG at lib/string_helpers.c:1031!
invalid opcode: 0000 [#1] PREEMPT SMP
CPU: 1 PID: 3217 Comm: syz-executor.0 Not tainted 6.5.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
RIP: 0010:fortify_panic+0x13/0x20 lib/string_helpers.c:1031
Code: 48 85 ff 75 e0 bb ea ff ff ff 89 d8 5b 5d 41 5c 41 5d c3 0f 1f 40 00 f3 0f 1e fa 48 89 fe 48 c7 c7 40 4d 67 83 e8 ad 5b 81 ff <0f> 0b 66 66 2e 0f 1f 84 00 00 00 00 00 f3 0f 1e fa 53 48 89 fb e8
RSP: 0018:ffffc90002bb3d80 EFLAGS: 00010246
RAX: 0000000000000023 RBX: ffff888106f8d400 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff83540297 RDI: 00000000ffffffff
RBP: ffff8881043591d0 R08: 0000000000000000 R09: ffffffff83afb5a0
R10: ffffc90002bb3c38 R11: ffffffff83bdb5e8 R12: ffff888106f8d464
R13: ffffffff82e2f340 R14: ffff88810370e590 R15: 0000000000000000
FS:  00007fdcb902d6c0(0000) GS:ffff88813bd00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f66b1195ed8 CR3: 0000000108d0e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 strnlen include/linux/fortify-string.h:181 [inline]
 strscpy include/linux/fortify-string.h:324 [inline]
 hfs_show_options+0x2d1/0x2f0 fs/hfs/super.c:138
 show_vfsmnt+0x159/0x1c0 fs/proc_namespace.c:129
 seq_read_iter+0x298/0x450 fs/seq_file.c:272
 call_read_iter include/linux/fs.h:1865 [inline]
 new_sync_read fs/read_write.c:389 [inline]
 vfs_read+0x1ec/0x330 fs/read_write.c:470
 ksys_read+0x70/0xf0 fs/read_write.c:613
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x38/0x80 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fdcb827cb29
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:00007fdcb902d0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007fdcb839bf80 RCX: 00007fdcb827cb29
RDX: 0000000000002020 RSI: 0000000020000340 RDI: 0000000000000004
RBP: 00007fdcb82c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000006 R14: 00007fdcb839bf80 R15: 00007ffcdca93ae8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:fortify_panic+0x13/0x20 lib/string_helpers.c:1031
Code: 48 85 ff 75 e0 bb ea ff ff ff 89 d8 5b 5d 41 5c 41 5d c3 0f 1f 40 00 f3 0f 1e fa 48 89 fe 48 c7 c7 40 4d 67 83 e8 ad 5b 81 ff <0f> 0b 66 66 2e 0f 1f 84 00 00 00 00 00 f3 0f 1e fa 53 48 89 fb e8
RSP: 0018:ffffc90002bb3d80 EFLAGS: 00010246
RAX: 0000000000000023 RBX: ffff888106f8d400 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff83540297 RDI: 00000000ffffffff
RBP: ffff8881043591d0 R08: 0000000000000000 R09: ffffffff83afb5a0
R10: ffffc90002bb3c38 R11: ffffffff83bdb5e8 R12: ffff888106f8d464
R13: ffffffff82e2f340 R14: ffff88810370e590 R15: 0000000000000000
FS:  00007fdcb902d6c0(0000) GS:ffff88813bd00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f66b1195ed8 CR3: 0000000108d0e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400