Re: [syzbot] [kernel?] WARNING in get_pat_info

Re: [syzbot] [kernel?] WARNING in get_pat_info

[syzbot]

syzbot has bisected this issue to:

commit 79a61cc3fc0466ad2b7b89618a6157785f0293b3
Author: Linus Torvalds <torvalds@linux-foundation.org>
Date:   Thu Sep 12 00:11:23 2024 +0000

    mm: avoid leaving partial pfn mappings around in error case

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=11df65f7980000
start commit:   7758b206117d Merge tag 'tracefs-v6.12-rc6' of git://git.ke..
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=13df65f7980000
console output: https://syzkaller.appspot.com/x/log.txt?x=15df65f7980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=921b01cbfd887a9b
dashboard link: https://syzkaller.appspot.com/bug?extid=16b1da89309a06cd0e3a
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=148adf40580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1704ae30580000

Reported-by: syzbot+16b1da89309a06cd0e3a@syzkaller.appspotmail.com
Fixes: 79a61cc3fc04 ("mm: avoid leaving partial pfn mappings around in error case")

For information about bisection process see: https://goo.gl/tpsmEJ#bisection

Re: [syzbot] [kernel?] WARNING in get_pat_info

[David Hildenbrand]

On 11.11.24 07:40, syzbot wrote:
> syzbot has bisected this issue to:
> 
> commit 79a61cc3fc0466ad2b7b89618a6157785f0293b3
> Author: Linus Torvalds <torvalds@linux-foundation.org>
> Date:   Thu Sep 12 00:11:23 2024 +0000
> 
>      mm: avoid leaving partial pfn mappings around in error case
> 
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=11df65f7980000
> start commit:   7758b206117d Merge tag 'tracefs-v6.12-rc6' of git://git.ke..
> git tree:       upstream
> final oops:     https://syzkaller.appspot.com/x/report.txt?x=13df65f7980000
> console output: https://syzkaller.appspot.com/x/log.txt?x=15df65f7980000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=921b01cbfd887a9b
> dashboard link: https://syzkaller.appspot.com/bug?extid=16b1da89309a06cd0e3a
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=148adf40580000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1704ae30580000
> 
> Reported-by: syzbot+16b1da89309a06cd0e3a@syzkaller.appspotmail.com
> Fixes: 79a61cc3fc04 ("mm: avoid leaving partial pfn mappings around in error case")
> 
> For information about bisection process see: https://goo.gl/tpsmEJ#bisection
> 

As discussed elsewhere [1], the patch [2] from Peter should fix this one.

I should probably resend both VM_PAT fixes that are on the list in a 
single series.

[1] 
https://lkml.kernel.org/r/262aa19c-59fe-420a-aeae-0b1866a3e36b@redhat.com

[2] 
https://lore.kernel.org/all/20240712144244.3090089-1-peterx@redhat.com/T/#u

-- 
Cheers,

David / dhildenb

Re: [syzbot] [kernel?] WARNING in get_pat_info

[syzbot]

syzbot suspects this issue was fixed by commit:

commit f8e97613fed25758ddf52159b87e1c66e619a23a
Author: David Hildenbrand <david@redhat.com>
Date:   Mon May 12 12:34:17 2025 +0000

    mm: convert VM_PFNMAP tracking to pfnmap_track() + pfnmap_untrack()

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=12f1448c580000
start commit:   fac04efc5c79 Linux 6.13-rc2
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=fee25f93665c89ac
dashboard link: https://syzkaller.appspot.com/bug?extid=16b1da89309a06cd0e3a
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=13e2ab30580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=11d113e8580000

If the result looks correct, please mark the issue as fixed by replying with:

#syz fix: mm: convert VM_PFNMAP tracking to pfnmap_track() + pfnmap_untrack()

For information about bisection process see: https://goo.gl/tpsmEJ#bisection

Re: [syzbot] [kernel?] WARNING in get_pat_info

[David Hildenbrand]

On 30.06.25 22:06, syzbot wrote:
> syzbot suspects this issue was fixed by commit:
> 
> commit f8e97613fed25758ddf52159b87e1c66e619a23a
> Author: David Hildenbrand <david@redhat.com>
> Date:   Mon May 12 12:34:17 2025 +0000
> 
>      mm: convert VM_PFNMAP tracking to pfnmap_track() + pfnmap_untrack()
> 
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=12f1448c580000
> start commit:   fac04efc5c79 Linux 6.13-rc2
> git tree:       upstream
> kernel config:  https://syzkaller.appspot.com/x/.config?x=fee25f93665c89ac
> dashboard link: https://syzkaller.appspot.com/bug?extid=16b1da89309a06cd0e3a
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=13e2ab30580000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=11d113e8580000
> 
> If the result looks correct, please mark the issue as fixed by replying with:
> 
> #syz fix: mm: convert VM_PFNMAP tracking to pfnmap_track() + pfnmap_untrack()

Yes, that should be correct. I didnt't remember that we had a syzbot complaint
about that one, otherwise I would have tagged it.

#syz fix: mm: convert VM_PFNMAP tracking to pfnmap_track() + pfnmap_untrack()

-- 
Cheers,

David / dhildenb