syzbot

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WARNING: CPU: 1 PID: 5234 at include/linux/mmap_lock.h:155 mmap_assert_locked include/linux/mmap_lock.h:155 [inline]
WARNING: CPU: 1 PID: 5234 at include/linux/mmap_lock.h:155 anon_vma_name+0x11c/0x170 mm/madvise.c:97
Modules linked in:
CPU: 1 PID: 5234 Comm: syz-executor251 Not tainted 6.1.0-rc5-next-20221114-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
RIP: 0010:mmap_assert_locked include/linux/mmap_lock.h:155 [inline]
RIP: 0010:anon_vma_name+0x11c/0x170 mm/madvise.c:97
Code: 8d bd 58 01 00 00 be ff ff ff ff e8 9e c8 e1 07 31 ff 41 89 c4 89 c6 e8 42 0c bc ff 45 85 e4 0f 85 5c ff ff ff e8 64 0f bc ff <0f> 0b e9 50 ff ff ff e8 58 0f bc ff 48 89 ef e8 d0 e7 f2 ff 0f 0b
RSP: 0018:ffffc90003ac7988 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffffffff8b9a9000 RCX: 0000000000000000
RDX: ffff888026a61d40 RSI: ffffffff81c10d8c RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffffffff8b9a9008 R14: ffffffff8b9a9010 R15: 0000000000000000
FS:  0000555555b2b300(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020003000 CR3: 0000000075062000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 show_map_vma+0x22d/0x620 fs/proc/task_mmu.c:297
 show_smap+0xe4/0x490 fs/proc/task_mmu.c:866
 seq_read_iter+0xbbe/0x1280 fs/seq_file.c:272
 seq_read+0x16d/0x210 fs/seq_file.c:162
 vfs_read+0x2dc/0x9d0 fs/read_write.c:468
 ksys_read+0x127/0x250 fs/read_write.c:613
 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: 0033:0x7fd11e9e0269
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:00007ffc1410a5d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fd11e9e0269
RDX: 0000000000002020 RSI: 0000000020008380 RDI: 0000000000000003
RBP: 00007ffc1410a5e0 R08: 68742f636f72702f R09: 68742f636f72702f
R10: 68742f636f72702f R11: 0000000000000246 R12: 00007fd11e9a4150
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>