linux-kernel - [syzbot] [kernel?] WARNING in get_pat

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Message-ID: <000000000000ebc1a306219068a5@google.com>
Date: Sat, 07 Sep 2024 17:06:19 -0700
From: syzbot <syzbot+16b1da89309a06cd0e3a@...kaller.appspotmail.com>
To: bp@...en8.de, dave.hansen@...ux.intel.com, hpa@...or.com, 
	linux-kernel@...r.kernel.org, luto@...nel.org, mingo@...hat.com, 
	peterz@...radead.org, syzkaller-bugs@...glegroups.com, tglx@...utronix.de, 
	x86@...nel.org
Subject: [syzbot] [kernel?] WARNING in get_pat_info

Hello,

syzbot found the following issue on:

HEAD commit:    67784a74e258 Merge tag 'ata-6.11-rc7' of git://git.kernel...
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=12ac82ab980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=931962fa28089080
dashboard link: https://syzkaller.appspot.com/bug?extid=16b1da89309a06cd0e3a
compiler:       gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/5d04638ac9ee/disk-67784a74.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/2b56a931235c/vmlinux-67784a74.xz
kernel image: https://storage.googleapis.com/syzbot-assets/3b447615c560/bzImage-67784a74.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+16b1da89309a06cd0e3a@...kaller.appspotmail.com

------------[ cut here ]------------
WARNING: CPU: 1 PID: 7739 at include/linux/rwsem.h:195 rwsem_assert_held include/linux/rwsem.h:195 [inline]
WARNING: CPU: 1 PID: 7739 at include/linux/rwsem.h:195 mmap_assert_locked include/linux/mmap_lock.h:65 [inline]
WARNING: CPU: 1 PID: 7739 at include/linux/rwsem.h:195 follow_pte+0x414/0x4c0 mm/memory.c:6133
Modules linked in:
CPU: 1 UID: 0 PID: 7739 Comm: syz.1.945 Not tainted 6.11.0-rc6-syzkaller-00019-g67784a74e258 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
R13: ffffc90004cff530 R14: ffffc90004cff550 R15: ffff88801e6e2600
FS:  00007f7831aab6c0(0000) GS:ffff8880b8900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c379ecd CR3: 000000002ad46000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 follow_phys arch/x86/mm/pat/memtype.c:957 [inline]
 get_pat_info+0xf2/0x510 arch/x86/mm/pat/memtype.c:991
 unmap_mapping_range_vma mm/memory.c:3734 [inline]
 unmap_mapping_range_tree mm/memory.c:3751 [inline]
 unmap_mapping_pages mm/memory.c:3817 [inline]
 unmap_mapping_range+0x1ee/0x280 mm/memory.c:3854
RIP: 0033:0x7f7830d79eb9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f7831aab038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f7830f15f80 RCX: 00007f7830d79eb9
RDX: 0000000000000300 RSI: 0000000020000080 RDI: ffffffffffffff9c
RBP: 00007f7830de793e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f7830f15f80 R15: 00007ffd316c3c28
 </TASK>


---
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