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Date:   Mon, 18 May 2020 00:27:16 -0700
From:   syzbot <syzbot+347e2331d03d06ab0224@...kaller.appspotmail.com>
To:     linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: BUG: Bad rss-counter state (4)

Hello,

syzbot found the following crash on:

HEAD commit:    ac935d22 Add linux-next specific files for 20200415
git tree:       linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=14b66e6e100000
kernel config:  https://syzkaller.appspot.com/x/.config?x=bc498783097e9019
dashboard link: https://syzkaller.appspot.com/bug?extid=347e2331d03d06ab0224
compiler:       gcc (GCC) 9.0.0 20181231 (experimental)
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=12d18e6e100000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=104170d6100000

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+347e2331d03d06ab0224@...kaller.appspotmail.com

BUG: Bad rss-counter state mm:00000000a67744c9 type:MM_ANONPAGES val:1
BUG: Bad rss-counter state mm:00000000f49d6d70 type:MM_ANONPAGES val:1
BUG: Bad rss-counter state mm:0000000006212dd2 type:MM_ANONPAGES val:1
BUG: Bad rss-counter state mm:00000000b6ae35d3 type:MM_ANONPAGES val:1
BUG: Bad rss-counter state mm:00000000d44d5c2e type:MM_ANONPAGES val:1
BUG: Bad rss-counter state mm:0000000023502204 type:MM_ANONPAGES val:1
BUG: Bad rss-counter state mm:000000001a912a5c type:MM_ANONPAGES val:1
BUG: Bad rss-counter state mm:0000000072bd9e23 type:MM_ANONPAGES val:1
BUG: Bad rss-counter state mm:0000000053ee80f7 type:MM_ANONPAGES val:1
BUG: Bad rss-counter state mm:000000003cc0aff9 type:MM_ANONPAGES val:1
BUG: Bad rss-counter state mm:000000005a4ef043 type:MM_ANONPAGES val:1
BUG: Bad rss-counter state mm:00000000fe0ab895 type:MM_ANONPAGES val:1
BUG: Bad rss-counter state mm:00000000863004ed type:MM_ANONPAGES val:1
BUG: Bad rss-counter state mm:0000000064449491 type:MM_ANONPAGES val:1
BUG: Bad rss-counter state mm:00000000f6a209ff type:MM_ANONPAGES val:1
BUG: Bad rss-counter state mm:000000008100dc4b type:MM_ANONPAGES val:1
BUG: Bad rss-counter state mm:00000000f80eb0e8 type:MM_ANONPAGES val:1
BUG: Bad rss-counter state mm:00000000475e50a5 type:MM_ANONPAGES val:1
BUG: Bad rss-counter state mm:00000000f2f5edcf type:MM_ANONPAGES val:1
BUG: Bad rss-counter state mm:00000000bf721456 type:MM_ANONPAGES val:1
BUG: Bad rss-counter state mm:00000000d8d29ec3 type:MM_ANONPAGES val:1
BUG: Bad rss-counter state mm:00000000b5dff60e type:MM_ANONPAGES val:1
BUG: Bad rss-counter state mm:000000001f0fe928 type:MM_ANONPAGES val:1
BUG: Bad rss-counter state mm:000000006fc01973 type:MM_ANONPAGES val:1


---
This bug is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@...glegroups.com.

syzbot will keep track of this bug report. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot can test patches for this bug, for details see:
https://goo.gl/tpsmEJ#testing-patches

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