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* [moderation/CI] Re: Use generic_file_read_iter() in hugetlbfs
@ 2026-07-08  5:15 syzbot ci
  0 siblings, 0 replies; 7+ messages in thread
From: syzbot ci @ 2026-07-08  5:15 UTC (permalink / raw)
  To: syzkaller-upstream-moderation; +Cc: syzbot

syzbot ci has tested the following series

[v1] Use generic_file_read_iter() in hugetlbfs
https://lore.kernel.org/all/20260707181713.208282-1-willy@infradead.org
* [PATCH 1/4] hugetlbfs: Set mapping folio order
* [PATCH 2/4] mm: Handle hugetlb correctly in is_page_hwpoison()
* [PATCH 3/4] filemap: add hwpoison handling to filemap_read()
* [PATCH 4/4] hugetlbfs: replace hugetlbfs_read_iter() with generic_file_read_iter()

and found the following issue:
kernel build error

Full report is available here:
https://ci.syzbot.org/series/5869d756-5b77-45e0-b5c2-de0fca422e49

***

kernel build error

tree:      mm-new
URL:       https://kernel.googlesource.com/pub/scm/linux/kernel/git/akpm/mm.git
base:      dc59e4fea9d83f03bad6bddf3fa2e52491777482
arch:      amd64
compiler:  Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
config:    https://ci.syzbot.org/builds/074ace85-e34d-4e22-a00b-a735d5f0684e/config

mm/memory-failure.c:1841:44: error: passing 'const struct folio *' to parameter of type 'struct folio *' discards qualifiers [-Werror,-Wincompatible-pointer-types-discards-qualifiers]
mm/memory-failure.c:1846:35: error: passing 'const struct folio *' to parameter of type 'struct folio *' discards qualifiers [-Werror,-Wincompatible-pointer-types-discards-qualifiers]

***

If these findings have caused you to resend the series or submit a
separate fix, please add the following tag to your commit message:
  Tested-by: syzbot@syzkaller.appspotmail.com

---
This report is generated by a bot. It may contain errors.
syzbot ci engineers can be reached at syzkaller@googlegroups.com.

To test a patch for this bug, please reply with `#syz test`
(should be on a separate line).

The patch should be attached to the email.
Note: arguments like custom git repos and branches are not supported.

The email will later be sent to:
[akpm@linux-foundation.org david@kernel.org jack@suse.cz jane.chu@oracle.com linmiaohe@huawei.com linux-mm@kvack.org muchun.song@linux.dev nao.horiguchi@gmail.com osalvador@suse.de willy@infradead.org]

If the report looks fine to you, reply with:
#syz upstream

If the report is a false positive, reply with
#syz invalid


^ permalink raw reply	[flat|nested] 7+ messages in thread
* [moderation/CI] Re: Use generic_file_read_iter() in hugetlbfs
@ 2026-07-10 20:52 syzbot ci
  2026-07-10 23:02 ` Pimyn Girgis
  0 siblings, 1 reply; 7+ messages in thread
From: syzbot ci @ 2026-07-10 20:52 UTC (permalink / raw)
  To: syzkaller-upstream-moderation; +Cc: syzbot

syzbot ci has tested the following series

[v2] Use generic_file_read_iter() in hugetlbfs
https://lore.kernel.org/all/20260709184740.1286561-1-willy@infradead.org
* [PATCH v2 01/10] mm: Rename folio_contain_hwpoison_page() to folio_has_hwpoison_page()
* [PATCH v2 02/10] hugetlb: Mark some function arguments as const
* [PATCH v2 03/10] filemap: Remove checks in mapping_set_folio_order_range()
* [PATCH v2 04/10] hugetlb: Set mapping folio order
* [PATCH v2 05/10] memory-failure: Remove raw_hwp_list_head()
* [PATCH v2 06/10] memory-failure: Prevent UAF in raw_hwp_page list
* [PATCH v2 07/10] mm: Handle hugetlb correctly in is_page_hwpoison()
* [PATCH v2 08/10] filemap: Add hwpoison handling to filemap_read()
* [PATCH v2 09/10] filemap: Add support for authoritative mappings
* [PATCH v2 10/10] hugetlb: replace hugetlbfs_read_iter() with generic_file_read_iter()

and found the following issue:
BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio

Full report is available here:
https://ci.syzbot.org/series/35ead019-1e81-4d15-8801-8ff11d9c959b

***

BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio

tree:      mm-new
URL:       https://kernel.googlesource.com/pub/scm/linux/kernel/git/akpm/mm.git
base:      dc59e4fea9d83f03bad6bddf3fa2e52491777482
arch:      amd64
compiler:  Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
config:    https://ci.syzbot.org/builds/fedb89e4-11ba-4995-927f-a51101829a59/config
syz repro: https://ci.syzbot.org/findings/7a0cb565-4340-4daf-8de2-06f5b1d2af93/syz_repro

BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor instruction fetch in kernel mode
#PF: error_code(0x0010) - not-present page
PGD 8000000117bc9067 P4D 8000000117bc9067 PUD 0 
Oops: Oops: 0010 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 5840 Comm: syz.2.19 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:0x0
Code: Unable to access opcode bytes at 0xffffffffffffffd6.
RSP: 0018:ffffc900035eebf8 EFLAGS: 00010293
RAX: ffffffff82063559 RBX: 1ffff920006bdd84 RCX: ffff88810ba18000
RDX: 0000000000000000 RSI: ffffea0000948000 RDI: ffff88810139d200
RBP: ffffc900035eecb0 R08: ffffea0000948007 R09: 1ffffd4000129000
R10: dffffc0000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 1ffffd4000129000 R14: ffffea0000948000 R15: 1ffffd4000129001
FS:  00007f2e39ef46c0(0000) GS:ffff88818dc11000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 000000011578a000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 filemap_read_folio+0x12c/0x3a0 mm/filemap.c:2512
 filemap_create_folio mm/filemap.c:2650 [inline]
 filemap_get_pages+0xe9a/0x21e0 mm/filemap.c:2714
 filemap_read+0x428/0x1700 mm/filemap.c:2841
 __kernel_read+0x4ca/0x960 fs/read_write.c:532
 integrity_kernel_read+0x89/0xd0 security/integrity/iint.c:28
 ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:222 [inline]
 ima_calc_file_hash+0x451/0x890 security/integrity/ima/ima_crypto.c:280
 ima_collect_measurement+0x51b/0xa00 security/integrity/ima/ima_api.c:300
 process_measurement+0x1272/0x1c10 security/integrity/ima/ima_main.c:425
 ima_file_mmap+0x1b0/0x200 security/integrity/ima/ima_main.c:523
 security_mmap_file+0x773/0xa20 security/security.c:2581
 vm_mmap_pgoff+0x134/0x4e0 mm/util.c:575
 ksys_mmap_pgoff+0x57d/0x760 mm/mmap.c:606
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2e38f9ce59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2e39ef4028 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f2e39215fa0 RCX: 00007f2e38f9ce59
RDX: 0000000000000007 RSI: 0000000000003000 RDI: 0000200000000000
RBP: 00007f2e39032e6f R08: ffffffffffffffff R09: 0000000000000000
R10: 0000000000040033 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2e39216038 R14: 00007f2e39215fa0 R15: 00007ffe3450a298
 </TASK>
Modules linked in:
CR2: 0000000000000000
---[ end trace 0000000000000000 ]---
RIP: 0010:0x0
Code: Unable to access opcode bytes at 0xffffffffffffffd6.
RSP: 0018:ffffc900035eebf8 EFLAGS: 00010293
RAX: ffffffff82063559 RBX: 1ffff920006bdd84 RCX: ffff88810ba18000
RDX: 0000000000000000 RSI: ffffea0000948000 RDI: ffff88810139d200
RBP: ffffc900035eecb0 R08: ffffea0000948007 R09: 1ffffd4000129000
R10: dffffc0000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 1ffffd4000129000 R14: ffffea0000948000 R15: 1ffffd4000129001
FS:  00007f2e39ef46c0(0000) GS:ffff88818dc11000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 000000011578a000 CR4: 00000000000006f0


***

If these findings have caused you to resend the series or submit a
separate fix, please add the following tag to your commit message:
  Tested-by: syzbot@syzkaller.appspotmail.com

---
This report is generated by a bot. It may contain errors.
syzbot ci engineers can be reached at syzkaller@googlegroups.com.

To test a patch for this bug, please reply with `#syz test`
(should be on a separate line).

The patch should be attached to the email.
Note: arguments like custom git repos and branches are not supported.

The email will later be sent to:
[akpm@linux-foundation.org christian@brauner.io david@kernel.org jack@suse.cz jane.chu@oracle.com linmiaohe@huawei.com linux-fsdevel@vger.kernel.org linux-mm@kvack.org muchun.song@linux.dev nao.horiguchi@gmail.com osalvador@suse.de willy@infradead.org]

If the report looks fine to you, reply with:
#syz upstream

If the report is a false positive, reply with
#syz invalid


^ permalink raw reply	[flat|nested] 7+ messages in thread
* [moderation/CI] Re: Use generic_file_read_iter() in hugetlbfs
@ 2026-07-15  8:24 syzbot ci
  2026-07-15  8:58 ` Aleksandr Nogikh
  0 siblings, 1 reply; 7+ messages in thread
From: syzbot ci @ 2026-07-15  8:24 UTC (permalink / raw)
  To: syzkaller-upstream-moderation; +Cc: syzbot

syzbot ci has tested the following series

[v3] Use generic_file_read_iter() in hugetlbfs
https://lore.kernel.org/all/20260714180840.3731244-1-willy@infradead.org
* [PATCH v3 1/9] mm: Rename folio_contain_hwpoison_page() to folio_has_hwpoison_page()
* [PATCH v3 2/9] hugetlb: Mark some function arguments as const
* [PATCH v3 3/9] memory-failure: Track hugetlb poison in a hash table
* [PATCH v3 4/9] mm: Handle hugetlb correctly in is_page_hwpoison()
* [PATCH v3 5/9] filemap: Add hwpoison handling to filemap_read()
* [PATCH v3 6/9] filemap: Remove checks in mapping_set_folio_order_range()
* [PATCH v3 7/9] hugetlb: Set mapping folio order
* [PATCH v3 8/9] filemap: Add support for authoritative mappings
* [PATCH v3 9/9] hugetlb: replace hugetlbfs_read_iter() with generic_file_read_iter()

and found the following issues:
* BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio
* WARNING in bio_add_page

Full report is available here:
https://ci.syzbot.org/series/1ea7e79d-5597-441f-9992-9436608be7df

***

BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio

tree:      mm-new
URL:       https://kernel.googlesource.com/pub/scm/linux/kernel/git/akpm/mm.git
base:      0e35b9b6ec0ffcc5e23cbdec09f5c622ad532b53
arch:      amd64
compiler:  Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
config:    https://ci.syzbot.org/builds/75e70bfb-8622-4cc5-b17f-aece199fcf0c/config
syz repro: https://ci.syzbot.org/findings/739ca35a-a1c0-4131-8e74-405498f14c31/syz_repro

BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor instruction fetch in kernel mode
#PF: error_code(0x0010) - not-present page
PGD 800000016c1bc067 P4D 800000016c1bc067 PUD 0 
Oops: Oops: 0010 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 5815 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:0x0
Code: Unable to access opcode bytes at 0xffffffffffffffd6.
RSP: 0018:ffffc9000297ebf8 EFLAGS: 00010293
RAX: ffffffff82063c39 RBX: 1ffff9200052fd84 RCX: ffff88816cc35940
RDX: 0000000000000000 RSI: ffffea00047cf100 RDI: ffff888112445200
RBP: ffffc9000297ecb0 R08: ffffea00047cf107 R09: 1ffffd40008f9e20
R10: dffffc0000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 1ffffd40008f9e20 R14: ffffea00047cf100 R15: 1ffffd40008f9e21
FS:  00007f7d325fe6c0(0000) GS:ffff88818dc0e000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 000000011311c000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 filemap_read_folio+0x12c/0x3a0 mm/filemap.c:2512
 filemap_create_folio mm/filemap.c:2650 [inline]
 filemap_get_pages+0xe9a/0x21e0 mm/filemap.c:2714
 filemap_read+0x428/0x1730 mm/filemap.c:2841
 __kernel_read+0x4ca/0x960 fs/read_write.c:532
 integrity_kernel_read+0x89/0xd0 security/integrity/iint.c:28
 ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:222 [inline]
 ima_calc_file_hash+0x451/0x890 security/integrity/ima/ima_crypto.c:280
 ima_collect_measurement+0x51b/0xa00 security/integrity/ima/ima_api.c:300
 process_measurement+0x1272/0x1c10 security/integrity/ima/ima_main.c:425
 ima_file_mmap+0x1b0/0x200 security/integrity/ima/ima_main.c:523
 security_mmap_file+0x773/0xa20 security/security.c:2581
 vm_mmap_pgoff+0x134/0x4e0 mm/util.c:575
 ksys_mmap_pgoff+0x57d/0x760 mm/mmap.c:606
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7d32f9ce59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f7d325fe028 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f7d33215fa0 RCX: 00007f7d32f9ce59
RDX: 0000000000000007 RSI: 0000000000003000 RDI: 0000200000000000
RBP: 00007f7d33032e6f R08: ffffffffffffffff R09: 0000000000000000
R10: 0000000000040033 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7d33216038 R14: 00007f7d33215fa0 R15: 00007ffc38aa2f18
 </TASK>
Modules linked in:
CR2: 0000000000000000
---[ end trace 0000000000000000 ]---
RIP: 0010:0x0
Code: Unable to access opcode bytes at 0xffffffffffffffd6.
RSP: 0018:ffffc9000297ebf8 EFLAGS: 00010293
RAX: ffffffff82063c39 RBX: 1ffff9200052fd84 RCX: ffff88816cc35940
RDX: 0000000000000000 RSI: ffffea00047cf100 RDI: ffff888112445200
RBP: ffffc9000297ecb0 R08: ffffea00047cf107 R09: 1ffffd40008f9e20
R10: dffffc0000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 1ffffd40008f9e20 R14: ffffea00047cf100 R15: 1ffffd40008f9e21
FS:  00007f7d325fe6c0(0000) GS:ffff88818dc0e000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 000000011311c000 CR4: 00000000000006f0


***

WARNING in bio_add_page

tree:      mm-new
URL:       https://kernel.googlesource.com/pub/scm/linux/kernel/git/akpm/mm.git
base:      0e35b9b6ec0ffcc5e23cbdec09f5c622ad532b53
arch:      amd64
compiler:  Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
config:    https://ci.syzbot.org/builds/75e70bfb-8622-4cc5-b17f-aece199fcf0c/config
syz repro: https://ci.syzbot.org/findings/a77d3cb3-6a99-45a3-bd83-722c3f7fcd2c/syz_repro

------------[ cut here ]------------
len == 0
WARNING: block/bio.c:1044 at bio_add_page+0x516/0x700 block/bio.c:1044, CPU#0: udevd/5627
Modules linked in:
CPU: 0 UID: 0 PID: 5627 Comm: udevd Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:bio_add_page+0x516/0x700 block/bio.c:1044
Code: 31 ed 44 89 e8 48 83 c4 50 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc e8 86 b2 30 fd 90 0f 0b 90 eb db e8 7b b2 30 fd 90 <0f> 0b 90 eb d0 e8 70 b2 30 fd 90 0f 0b 90 e9 76 fe ff ff e8 62 b2
RSP: 0018:ffffc90004a0f0d8 EFLAGS: 00010293
RAX: ffffffff8495b105 RBX: 0000000000000000 RCX: ffff88816d2c1dc0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 1ffff11020ef5792 R08: ffff8881077abcff R09: 1ffff11020ef579f
R10: dffffc0000000000 R11: ffffed1020ef57a0 R12: ffff8881077abc94
R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000
FS:  00007f1740f39c80(0000) GS:ffff88818dc0e000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005641bf6c0b88 CR3: 00000001bbfcc000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 bio_add_folio+0x64/0x90 block/bio.c:1099
 do_mpage_readpage+0xd8c/0x1b40 fs/mpage.c:294
 mpage_readahead+0x3e7/0x800 fs/mpage.c:370
 read_pages+0x193/0x5a0 mm/readahead.c:174
 page_cache_ra_unbounded+0x754/0x9d0 mm/readahead.c:315
 do_page_cache_ra mm/readahead.c:348 [inline]
 force_page_cache_ra+0x26c/0x2e0 mm/readahead.c:378
 filemap_get_pages+0x560/0x21e0 mm/filemap.c:2708
 filemap_read+0x428/0x1730 mm/filemap.c:2841
 blkdev_read_iter+0x2f1/0x420 block/fops.c:830
 new_sync_read fs/read_write.c:493 [inline]
 vfs_read+0x595/0xa80 fs/read_write.c:574
 ksys_read+0x150/0x270 fs/read_write.c:716
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1740b16b6a
Code: 00 3d 00 00 41 00 75 0d 50 48 8d 3d 2d 08 0a 00 e8 ea 7d 01 00 31 c0 e9 07 ff ff ff 64 8b 04 25 18 00 00 00 85 c0 75 1b 0f 05 <48> 3d 00 f0 ff ff 76 6c 48 8b 15 8f a2 0d 00 f7 d8 64 89 02 48 83
RSP: 002b:00007ffe51f09b58 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f1740b16b6a
RDX: 0000000000000400 RSI: 00005641bf68db38 RDI: 0000000000000009
RBP: 0000000000000400 R08: 00005641bf68db10 R09: 0000000000000008
R10: 0000000000000051 R11: 0000000000000246 R12: 00005641bf68db10
R13: 00005641bf68db28 R14: 00005641bf690128 R15: 00005641bf6900d0
 </TASK>


***

If these findings have caused you to resend the series or submit a
separate fix, please add the following tag to your commit message:
  Tested-by: syzbot@syzkaller.appspotmail.com

---
This report is generated by a bot. It may contain errors.
syzbot ci engineers can be reached at syzkaller@googlegroups.com.

To test a patch for this bug, please reply with `#syz test`
(should be on a separate line).

The patch should be attached to the email.
Note: arguments like custom git repos and branches are not supported.

The email will later be sent to:
[akpm@linux-foundation.org christian@brauner.io david@kernel.org jack@suse.cz jane.chu@oracle.com linmiaohe@huawei.com linux-fsdevel@vger.kernel.org linux-mm@kvack.org muchun.song@linux.dev nao.horiguchi@gmail.com osalvador@suse.de usama.arif@linux.dev willy@infradead.org]

If the report looks fine to you, reply with:
#syz upstream

If the report is a false positive, reply with
#syz invalid


^ permalink raw reply	[flat|nested] 7+ messages in thread
* [moderation/CI] Re: Use generic_file_read_iter() in hugetlbfs
@ 2026-07-24 23:35 syzbot ci
  2026-07-25  5:02 ` Pimyn Girgis
  0 siblings, 1 reply; 7+ messages in thread
From: syzbot ci @ 2026-07-24 23:35 UTC (permalink / raw)
  To: syzkaller-upstream-moderation; +Cc: syzbot

syzbot ci has tested the following series

[v4] Use generic_file_read_iter() in hugetlbfs
https://lore.kernel.org/all/20260723143034.175661-1-willy@infradead.org
* [PATCH v4 01/14] memory-failure: Fix hardware poison check in unpoison_memory() again
* [PATCH v4 02/14] memory-failure: Test the page is hwpoison before taking the mutex
* [PATCH v4 03/14] mm: Rename folio_contain_hwpoison_page() to folio_has_hwpoison_page()
* [PATCH v4 04/14] hugetlb: Mark some function arguments as const
* [PATCH v4 05/14] guest_memfd: Use folio_has_hwpoisoned_page()
* [PATCH v4 06/14] memory-failure: Remove raw_hwp_list_head()
* [PATCH v4 07/14] hugetlb: Use the has_hwpoisoned flag
* [PATCH v4 08/14] mm: Remove locking mf_mutex in is_raw_hwpoison_page_in_hugepage()
* [PATCH v4 09/14] mm: Check individual hugetlb pages for poison
* [PATCH v4 10/14] filemap: Add hwpoison handling to filemap_read()
* [PATCH v4 11/14] filemap: Remove checks in mapping_set_folio_order_range()
* [PATCH v4 12/14] hugetlb: Set mapping folio order
* [PATCH v4 13/14] filemap: Add support for authoritative mappings
* [PATCH v4 14/14] hugetlb: replace hugetlbfs_read_iter() with generic_file_read_iter()

and found the following issues:
* WARNING in bio_add_page
* general protection fault in create_empty_buffers

Full report is available here:
https://ci.syzbot.org/series/4b3a4f52-06f4-4a41-872f-dde0771be8ef

***

WARNING in bio_add_page

tree:      mm-new
URL:       https://kernel.googlesource.com/pub/scm/linux/kernel/git/akpm/mm.git
base:      1590cf0329716306e948a8fc29f1d3ee87d3989f
arch:      amd64
compiler:  Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
config:    https://ci.syzbot.org/builds/bb071828-9749-428c-a78c-fc39b0b5caf2/config
syz repro: https://ci.syzbot.org/findings/38d53450-b153-4f47-8474-be250791ea91/syz_repro

------------[ cut here ]------------
len == 0
WARNING: block/bio.c:1052 at bio_add_page+0x516/0x700 block/bio.c:1052, CPU#0: udevd/5630
Modules linked in:
CPU: 0 UID: 0 PID: 5630 Comm: udevd Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:bio_add_page+0x516/0x700 block/bio.c:1052
Code: 31 ed 44 89 e8 48 83 c4 50 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc e8 86 5e 17 fd 90 0f 0b 90 eb db e8 7b 5e 17 fd 90 <0f> 0b 90 eb d0 e8 70 5e 17 fd 90 0f 0b 90 e9 76 fe ff ff e8 62 5e
RSP: 0018:ffffc9000487f0f8 EFLAGS: 00010293
RAX: ffffffff84af2445 RBX: 0000000000000000 RCX: ffff8881108d0000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 1ffff110228761e2 R08: ffff8881143b0f7f R09: 1ffff110228761ef
R10: dffffc0000000000 R11: ffffed10228761f0 R12: ffff8881143b0f14
R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000
FS:  00007faeac7ccc80(0000) GS:ffff88818d945000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000295e815ae000 CR3: 0000000114e0e000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 bio_add_folio+0x64/0x90 block/bio.c:1107
 do_mpage_readpage+0xd8c/0x1b40 fs/mpage.c:294
 mpage_readahead+0x3e7/0x800 fs/mpage.c:370
 read_pages+0x193/0x5a0 mm/readahead.c:174
 page_cache_ra_unbounded+0x679/0x8f0 mm/readahead.c:315
 do_page_cache_ra mm/readahead.c:348 [inline]
 force_page_cache_ra+0x26c/0x2e0 mm/readahead.c:378
 filemap_get_pages+0x4d9/0x1ef0 mm/filemap.c:2708
 filemap_read+0x422/0x1630 mm/filemap.c:2841
 blkdev_read_iter+0x2f1/0x420 block/fops.c:830
 new_sync_read fs/read_write.c:493 [inline]
 vfs_read+0x595/0xa80 fs/read_write.c:574
 ksys_read+0x150/0x270 fs/read_write.c:716
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7faeac316b6a
Code: 00 3d 00 00 41 00 75 0d 50 48 8d 3d 2d 08 0a 00 e8 ea 7d 01 00 31 c0 e9 07 ff ff ff 64 8b 04 25 18 00 00 00 85 c0 75 1b 0f 05 <48> 3d 00 f0 ff ff 76 6c 48 8b 15 8f a2 0d 00 f7 d8 64 89 02 48 83
RSP: 002b:00007ffd8d811da8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007faeac316b6a
RDX: 0000000000000400 RSI: 0000557e6b670e18 RDI: 0000000000000009
RBP: 0000000000000400 R08: 0000557e6b670df0 R09: 0000000000000008
R10: 0000000000000051 R11: 0000000000000246 R12: 0000557e6b670df0
R13: 0000557e6b670e08 R14: 0000557e6b66e128 R15: 0000557e6b66e0d0
 </TASK>


***

general protection fault in create_empty_buffers

tree:      mm-new
URL:       https://kernel.googlesource.com/pub/scm/linux/kernel/git/akpm/mm.git
base:      1590cf0329716306e948a8fc29f1d3ee87d3989f
arch:      amd64
compiler:  Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
config:    https://ci.syzbot.org/builds/bb071828-9749-428c-a78c-fc39b0b5caf2/config
syz repro: https://ci.syzbot.org/findings/2406d176-ea76-40a8-b6bc-41d3e6326388/syz_repro

Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 1 UID: 0 PID: 5932 Comm: udevd Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:create_empty_buffers+0x48/0x520 fs/buffer.c:1672
Code: 00 00 00 00 fc ff df e8 96 dc 69 ff 48 89 df 4c 89 e6 ba 40 8c 40 00 e8 e6 bc ff ff 49 89 c4 48 89 04 24 4c 89 e0 48 c1 e8 03 <42> 80 3c 30 00 74 08 4c 89 e7 e8 09 bc d7 ff 4d 09 3c 24 49 83 c4
RSP: 0018:ffffc900034bf570 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffffea0005ceb100 RCX: 0000000000000046
RDX: 0000000000000002 RSI: ffffffff8e4b7f70 RDI: ffff888172cdbb80
RBP: ffffc900034bf6f0 R08: ffffffff825c6656 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff8eb5a120 R12: 0000000000000000
R13: 1ffffd4000b9d620 R14: dffffc0000000000 R15: 0000000000000000
FS:  00007fd3c0fc7c80(0000) GS:ffff8882a8f45000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005567a5ebae48 CR3: 000000017395c000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 block_read_full_folio+0x116/0x810 fs/buffer.c:2381
 filemap_read_folio+0x12c/0x3a0 mm/filemap.c:2512
 filemap_update_page mm/filemap.c:2599 [inline]
 filemap_get_pages+0x1742/0x1ef0 mm/filemap.c:2731
 filemap_read+0x422/0x1630 mm/filemap.c:2841
 blkdev_read_iter+0x2f1/0x420 block/fops.c:830
 new_sync_read fs/read_write.c:493 [inline]
 vfs_read+0x595/0xa80 fs/read_write.c:574
 ksys_read+0x150/0x270 fs/read_write.c:716
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd3c0b16b6a
Code: 00 3d 00 00 41 00 75 0d 50 48 8d 3d 2d 08 0a 00 e8 ea 7d 01 00 31 c0 e9 07 ff ff ff 64 8b 04 25 18 00 00 00 85 c0 75 1b 0f 05 <48> 3d 00 f0 ff ff 76 6c 48 8b 15 8f a2 0d 00 f7 d8 64 89 02 48 83
RSP: 002b:00007ffcab174708 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fd3c0b16b6a
RDX: 0000000000000400 RSI: 000055c883b6c638 RDI: 0000000000000009
RBP: 0000000000000400 R08: 000055c883b6c610 R09: 0000000000000008
R10: 0000000000000051 R11: 0000000000000246 R12: 000055c883b6c610
R13: 000055c883b6c628 R14: 000055c883b60b48 R15: 000055c883b60af0
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:create_empty_buffers+0x48/0x520 fs/buffer.c:1672
Code: 00 00 00 00 fc ff df e8 96 dc 69 ff 48 89 df 4c 89 e6 ba 40 8c 40 00 e8 e6 bc ff ff 49 89 c4 48 89 04 24 4c 89 e0 48 c1 e8 03 <42> 80 3c 30 00 74 08 4c 89 e7 e8 09 bc d7 ff 4d 09 3c 24 49 83 c4
RSP: 0018:ffffc900034bf570 EFLAGS: 00010246

RAX: 0000000000000000 RBX: ffffea0005ceb100 RCX: 0000000000000046
RDX: 0000000000000002 RSI: ffffffff8e4b7f70 RDI: ffff888172cdbb80
RBP: ffffc900034bf6f0 R08: ffffffff825c6656 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff8eb5a120 R12: 0000000000000000
R13: 1ffffd4000b9d620 R14: dffffc0000000000 R15: 0000000000000000
FS:  00007fd3c0fc7c80(0000) GS:ffff8882a8f45000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30763fff CR3: 000000017395c000 CR4: 00000000000006f0
----------------
Code disassembly (best guess), 6 bytes skipped:
   0:	df e8                	fucomip %st(0),%st
   2:	96                   	xchg   %eax,%esi
   3:	dc 69 ff             	fsubrl -0x1(%rcx)
   6:	48 89 df             	mov    %rbx,%rdi
   9:	4c 89 e6             	mov    %r12,%rsi
   c:	ba 40 8c 40 00       	mov    $0x408c40,%edx
  11:	e8 e6 bc ff ff       	call   0xffffbcfc
  16:	49 89 c4             	mov    %rax,%r12
  19:	48 89 04 24          	mov    %rax,(%rsp)
  1d:	4c 89 e0             	mov    %r12,%rax
  20:	48 c1 e8 03          	shr    $0x3,%rax
* 24:	42 80 3c 30 00       	cmpb   $0x0,(%rax,%r14,1) <-- trapping instruction
  29:	74 08                	je     0x33
  2b:	4c 89 e7             	mov    %r12,%rdi
  2e:	e8 09 bc d7 ff       	call   0xffd7bc3c
  33:	4d 09 3c 24          	or     %r15,(%r12)
  37:	49                   	rex.WB
  38:	83                   	.byte 0x83
  39:	c4                   	.byte 0xc4


***

If these findings have caused you to resend the series or submit a
separate fix, please add the following tag to your commit message:
  Tested-by: syzbot@syzkaller.appspotmail.com

---
This report is generated by a bot. It may contain errors.
syzbot ci engineers can be reached at syzkaller@googlegroups.com.

To test a patch for this bug, please reply with `#syz test`
(should be on a separate line).

The patch should be attached to the email.
Note: arguments like custom git repos and branches are not supported.

The email will later be sent to:
[akpm@linux-foundation.org christian@brauner.io david@kernel.org jack@suse.cz jane.chu@oracle.com jiaqiyan@google.com linmiaohe@huawei.com linux-fsdevel@vger.kernel.org linux-mm@kvack.org muchun.song@linux.dev nao.horiguchi@gmail.com naoya.horiguchi@nec.com osalvador@suse.de stable@vger.kernel.org usama.arif@linux.dev willy@infradead.org]

If the report looks fine to you, reply with:
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If the report is a false positive, reply with
#syz invalid


^ permalink raw reply	[flat|nested] 7+ messages in thread
end of thread, other threads:[~2026-07-25  5:02 UTC | newest]

Thread overview: 7+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2026-07-08  5:15 [moderation/CI] Re: Use generic_file_read_iter() in hugetlbfs syzbot ci
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2026-07-10 20:52 syzbot ci
2026-07-10 23:02 ` Pimyn Girgis
2026-07-15  8:24 syzbot ci
2026-07-15  8:58 ` Aleksandr Nogikh
2026-07-24 23:35 syzbot ci
2026-07-25  5:02 ` Pimyn Girgis

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