Message-ID: <00000000000069b4ee061d5334e4@google.com>
Date: Mon, 15 Jul 2024 18:24:19 -0700
From: syzbot <syzbot+a3e82ae343b26b4d2335@...kaller.appspotmail.com>
To: akpm@...ux-foundation.org, aleksandr.mikhalitsyn@...onical.com, 
	brauner@...nel.org, jack@...e.cz, linux-fsdevel@...r.kernel.org, 
	linux-kernel@...r.kernel.org, linux-mm@...ck.org, 
	syzkaller-bugs@...glegroups.com, viro@...iv.linux.org.uk
Subject: [syzbot] [mm?] BUG: sleeping function called from invalid context in vma_alloc_folio_noprof

Hello,

syzbot found the following issue on:

HEAD commit:    3fe121b62282 Add linux-next specific files for 20240712
git tree:       linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=12ba9149980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=98dd8c4bab5cdce
dashboard link: https://syzkaller.appspot.com/bug?extid=a3e82ae343b26b4d2335
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=144c4b66980000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=163c28f6980000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/8c6fbf69718d/disk-3fe121b6.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/39fc7e43dfc1/vmlinux-3fe121b6.xz
kernel image: https://storage.googleapis.com/syzbot-assets/0a78e70e4b4e/bzImage-3fe121b6.xz

The issue was bisected to:

commit ca567df74a28a9fb368c6b2d93e864113f73f5c2
Author: Christian Brauner <brauner@...nel.org>
Date:   Sun Jun 7 20:47:08 2020 +0000

    nsfs: add pid translation ioctls

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=1073805e980000
final oops:     https://syzkaller.appspot.com/x/report.txt?x=1273805e980000
console output: https://syzkaller.appspot.com/x/log.txt?x=1473805e980000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+a3e82ae343b26b4d2335@...kaller.appspotmail.com
Fixes: ca567df74a28 ("nsfs: add pid translation ioctls")

BUG: sleeping function called from invalid context at include/linux/sched/mm.h:337
in_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 5092, name: syz-executor156
preempt_count: 0, expected: 0
RCU nest depth: 1, expected: 0
INFO: lockdep is turned off.
CPU: 1 UID: 0 PID: 5092 Comm: syz-executor156 Not tainted 6.10.0-rc7-next-20240712-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 __might_resched+0x5d4/0x780 kernel/sched/core.c:8526
 might_alloc include/linux/sched/mm.h:337 [inline]
 prepare_alloc_pages+0x1c9/0x5d0 mm/page_alloc.c:4503
 __alloc_pages_noprof+0x166/0x6c0 mm/page_alloc.c:4721
 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2263
 folio_alloc_mpol_noprof mm/mempolicy.c:2281 [inline]
 vma_alloc_folio_noprof+0x12e/0x230 mm/mempolicy.c:2312
 folio_prealloc+0x31/0x170
 wp_page_copy mm/memory.c:3342 [inline]
 do_wp_page+0x11cc/0x52f0 mm/memory.c:3734
 handle_pte_fault+0x1138/0x6eb0 mm/memory.c:5545
 __handle_mm_fault mm/memory.c:5672 [inline]
 handle_mm_fault+0xff1/0x19a0 mm/memory.c:5837
 do_user_addr_fault arch/x86/mm/fault.c:1338 [inline]
 handle_page_fault arch/x86/mm/fault.c:1481 [inline]
 exc_page_fault+0x459/0x8c0 arch/x86/mm/fault.c:1539
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7f3a8171eb80
Code: 84 dd fe ff ff 4c 89 e7 e8 ed 90 00 00 e9 d0 fe ff ff 0f 1f 84 00 00 00 00 00 49 8b 06 48 89 45 00 48 85 c0 0f 85 85 00 00 00 <c6> 05 49 25 0a 00 01 31 c0 87 05 19 21 0a 00 83 f8 01 0f 8f 84 00
RSP: 002b:00007ffc347a4150 EFLAGS: 00010246


---
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