[syzbot] [fs?] [mm?] kernel BUG in __filemap_add_folio
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syzbot
Apr 24, 2025, 9:19:28 PMApr 24
to ak...@linux-foundation.org, bra...@kernel.org, ha...@suse.de, linux-...@vger.kernel.org, linux-...@vger.kernel.org, linu...@kvack.org, mcg...@kernel.org, syzkall...@googlegroups.com, wi...@infradead.org
Hello,
syzbot found the following issue on:
HEAD commit: ac71fabf1567 gcc-15: work around sequence-point warning
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1269b204580000
kernel config: https://syzkaller.appspot.com/x/.config?x=68d9f79fc685cd4
dashboard link: https://syzkaller.appspot.com/bug?extid=4d3cc33ef7a77041efa6
compiler: Debian clang version 15.0.6, Debian LLD 15.0.6
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10b2cc70580000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14a91ccc580000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/c03ec6447343/disk-ac71fabf.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/e02e7fb54511/vmlinux-ac71fabf.xz
kernel image: https://storage.googleapis.com/syzbot-assets/7d53dcc94699/bzImage-ac71fabf.xz
The issue was bisected to:
commit 47dd67532303803a87f43195e088b3b4bcf0454d
Author: Luis Chamberlain <mcg...@kernel.org>
Date: Fri Feb 21 22:38:22 2025 +0000
block/bdev: lift block size restrictions to 64k
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=11d62c70580000
final oops: https://syzkaller.appspot.com/x/report.txt?x=13d62c70580000
console output: https://syzkaller.appspot.com/x/log.txt?x=15d62c70580000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+4d3cc3...@syzkaller.appspotmail.com
Fixes: 47dd67532303 ("block/bdev: lift block size restrictions to 64k")
__handle_mm_fault mm/memory.c:6140 [inline]
handle_mm_fault+0x1129/0x1bf0 mm/memory.c:6309
do_user_addr_fault arch/x86/mm/fault.c:1337 [inline]
handle_page_fault arch/x86/mm/fault.c:1480 [inline]
exc_page_fault+0x45b/0x920 arch/x86/mm/fault.c:1538
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
------------[ cut here ]------------
kernel BUG at mm/filemap.c:868!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 1 UID: 0 PID: 5909 Comm: syz-executor413 Not tainted 6.15.0-rc2-syzkaller-00493-gac71fabf1567 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:__filemap_add_folio+0x1554/0x16c0 mm/filemap.c:867
Code: e9 c5 ff 4c 89 e7 48 c7 c6 80 0e 54 8c e8 44 43 12 00 90 0f 0b e8 cc e9 c5 ff 4c 89 e7 48 c7 c6 00 05 54 8c e8 2d 43 12 00 90 <0f> 0b e8 b5 e9 c5 ff 4c 89 e7 48 c7 c6 80 0e 54 8c e8 16 43 12 00
RSP: 0018:ffffc90004087300 EFLAGS: 00010246
RAX: ba56fbab94ec7e00 RBX: 0000000000000004 RCX: ffffffff93686020
RDX: dffffc0000000000 RSI: ffffffff8e6497f7 RDI: 0000000000000001
RBP: ffffc900040874b0 R08: ffffffff905fe577 R09: 1ffffffff20bfcae
R10: dffffc0000000000 R11: fffffbfff20bfcaf R12: ffffea0001ededc0
R13: ffffc90004087400 R14: 0000000000000000 R15: dffffc0000000000
FS: 0000555577940380(0000) GS:ffff88812509a000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb2a265a1f0 CR3: 000000007eb78000 CR4: 0000000000350ef0
Call Trace:
<TASK>
filemap_add_folio+0x157/0x380 mm/filemap.c:969
page_cache_ra_unbounded+0x40c/0x820 mm/readahead.c:275
do_sync_mmap_readahead+0x3e6/0x6c0 mm/filemap.c:-1
filemap_fault+0x763/0x13d0 mm/filemap.c:3403
__do_fault+0x137/0x390 mm/memory.c:5098
do_shared_fault mm/memory.c:5582 [inline]
do_fault mm/memory.c:5656 [inline]
do_pte_missing mm/memory.c:4160 [inline]
handle_pte_fault+0xfcc/0x61c0 mm/memory.c:5997
__handle_mm_fault mm/memory.c:6140 [inline]
handle_mm_fault+0x1129/0x1bf0 mm/memory.c:6309
do_user_addr_fault arch/x86/mm/fault.c:1337 [inline]
handle_page_fault arch/x86/mm/fault.c:1480 [inline]
exc_page_fault+0x45b/0x920 arch/x86/mm/fault.c:1538
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7fb2a25adba4
Code: 2d 41 b8 13 00 00 00 bf 09 00 00 00 bb 03 00 00 00 e8 b0 14 03 00 ba 71 12 08 40 bf 10 00 00 00 48 b8 00 01 00 00 00 20 00 00 <48> c7 00 00 00 01 00 48 8b 35 1e 95 0a 00 48 89 c1 31 c0 e8 84 14
RSP: 002b:00007ffd9b4d3c20 EFLAGS: 00010217
RAX: 0000200000000100 RBX: 0000000000000003 RCX: 00007fb2a25df059
RDX: 0000000040081271 RSI: 0000000000b36000 RDI: 0000000000000010
RBP: 0000000000000000 R08: 0000000000000004 R09: 0000000000000000
R10: 0000000000000013 R11: 0000000000000216 R12: 00007ffd9b4d3c4c
R13: 00007ffd9b4d3c60 R14: 00007ffd9b4d3ca0 R15: 0000000000000008
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__filemap_add_folio+0x1554/0x16c0 mm/filemap.c:867
Code: e9 c5 ff 4c 89 e7 48 c7 c6 80 0e 54 8c e8 44 43 12 00 90 0f 0b e8 cc e9 c5 ff 4c 89 e7 48 c7 c6 00 05 54 8c e8 2d 43 12 00 90 <0f> 0b e8 b5 e9 c5 ff 4c 89 e7 48 c7 c6 80 0e 54 8c e8 16 43 12 00
RSP: 0018:ffffc90004087300 EFLAGS: 00010246
RAX: ba56fbab94ec7e00 RBX: 0000000000000004 RCX: ffffffff93686020
RDX: dffffc0000000000 RSI: ffffffff8e6497f7 RDI: 0000000000000001
RBP: ffffc900040874b0 R08: ffffffff905fe577 R09: 1ffffffff20bfcae
R10: dffffc0000000000 R11: fffffbfff20bfcaf R12: ffffea0001ededc0
R13: ffffc90004087400 R14: 0000000000000000 R15: dffffc0000000000
FS: 0000555577940380(0000) GS:ffff888124f9a000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb2a265a1f0 CR3: 000000007eb78000 CR4: 0000000000350ef0
---
This report 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 syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.
If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
syzbot found the following issue on:
HEAD commit: ac71fabf1567 gcc-15: work around sequence-point warning
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1269b204580000
kernel config: https://syzkaller.appspot.com/x/.config?x=68d9f79fc685cd4
dashboard link: https://syzkaller.appspot.com/bug?extid=4d3cc33ef7a77041efa6
compiler: Debian clang version 15.0.6, Debian LLD 15.0.6
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10b2cc70580000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14a91ccc580000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/c03ec6447343/disk-ac71fabf.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/e02e7fb54511/vmlinux-ac71fabf.xz
kernel image: https://storage.googleapis.com/syzbot-assets/7d53dcc94699/bzImage-ac71fabf.xz
The issue was bisected to:
commit 47dd67532303803a87f43195e088b3b4bcf0454d
Author: Luis Chamberlain <mcg...@kernel.org>
Date: Fri Feb 21 22:38:22 2025 +0000
block/bdev: lift block size restrictions to 64k
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=11d62c70580000
final oops: https://syzkaller.appspot.com/x/report.txt?x=13d62c70580000
console output: https://syzkaller.appspot.com/x/log.txt?x=15d62c70580000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+4d3cc3...@syzkaller.appspotmail.com
Fixes: 47dd67532303 ("block/bdev: lift block size restrictions to 64k")
__handle_mm_fault mm/memory.c:6140 [inline]
handle_mm_fault+0x1129/0x1bf0 mm/memory.c:6309
do_user_addr_fault arch/x86/mm/fault.c:1337 [inline]
handle_page_fault arch/x86/mm/fault.c:1480 [inline]
exc_page_fault+0x45b/0x920 arch/x86/mm/fault.c:1538
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
------------[ cut here ]------------
kernel BUG at mm/filemap.c:868!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 1 UID: 0 PID: 5909 Comm: syz-executor413 Not tainted 6.15.0-rc2-syzkaller-00493-gac71fabf1567 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:__filemap_add_folio+0x1554/0x16c0 mm/filemap.c:867
Code: e9 c5 ff 4c 89 e7 48 c7 c6 80 0e 54 8c e8 44 43 12 00 90 0f 0b e8 cc e9 c5 ff 4c 89 e7 48 c7 c6 00 05 54 8c e8 2d 43 12 00 90 <0f> 0b e8 b5 e9 c5 ff 4c 89 e7 48 c7 c6 80 0e 54 8c e8 16 43 12 00
RSP: 0018:ffffc90004087300 EFLAGS: 00010246
RAX: ba56fbab94ec7e00 RBX: 0000000000000004 RCX: ffffffff93686020
RDX: dffffc0000000000 RSI: ffffffff8e6497f7 RDI: 0000000000000001
RBP: ffffc900040874b0 R08: ffffffff905fe577 R09: 1ffffffff20bfcae
R10: dffffc0000000000 R11: fffffbfff20bfcaf R12: ffffea0001ededc0
R13: ffffc90004087400 R14: 0000000000000000 R15: dffffc0000000000
FS: 0000555577940380(0000) GS:ffff88812509a000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb2a265a1f0 CR3: 000000007eb78000 CR4: 0000000000350ef0
Call Trace:
<TASK>
filemap_add_folio+0x157/0x380 mm/filemap.c:969
page_cache_ra_unbounded+0x40c/0x820 mm/readahead.c:275
do_sync_mmap_readahead+0x3e6/0x6c0 mm/filemap.c:-1
filemap_fault+0x763/0x13d0 mm/filemap.c:3403
__do_fault+0x137/0x390 mm/memory.c:5098
do_shared_fault mm/memory.c:5582 [inline]
do_fault mm/memory.c:5656 [inline]
do_pte_missing mm/memory.c:4160 [inline]
handle_pte_fault+0xfcc/0x61c0 mm/memory.c:5997
__handle_mm_fault mm/memory.c:6140 [inline]
handle_mm_fault+0x1129/0x1bf0 mm/memory.c:6309
do_user_addr_fault arch/x86/mm/fault.c:1337 [inline]
handle_page_fault arch/x86/mm/fault.c:1480 [inline]
exc_page_fault+0x45b/0x920 arch/x86/mm/fault.c:1538
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7fb2a25adba4
Code: 2d 41 b8 13 00 00 00 bf 09 00 00 00 bb 03 00 00 00 e8 b0 14 03 00 ba 71 12 08 40 bf 10 00 00 00 48 b8 00 01 00 00 00 20 00 00 <48> c7 00 00 00 01 00 48 8b 35 1e 95 0a 00 48 89 c1 31 c0 e8 84 14
RSP: 002b:00007ffd9b4d3c20 EFLAGS: 00010217
RAX: 0000200000000100 RBX: 0000000000000003 RCX: 00007fb2a25df059
RDX: 0000000040081271 RSI: 0000000000b36000 RDI: 0000000000000010
RBP: 0000000000000000 R08: 0000000000000004 R09: 0000000000000000
R10: 0000000000000013 R11: 0000000000000216 R12: 00007ffd9b4d3c4c
R13: 00007ffd9b4d3c60 R14: 00007ffd9b4d3ca0 R15: 0000000000000008
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__filemap_add_folio+0x1554/0x16c0 mm/filemap.c:867
Code: e9 c5 ff 4c 89 e7 48 c7 c6 80 0e 54 8c e8 44 43 12 00 90 0f 0b e8 cc e9 c5 ff 4c 89 e7 48 c7 c6 00 05 54 8c e8 2d 43 12 00 90 <0f> 0b e8 b5 e9 c5 ff 4c 89 e7 48 c7 c6 80 0e 54 8c e8 16 43 12 00
RSP: 0018:ffffc90004087300 EFLAGS: 00010246
RAX: ba56fbab94ec7e00 RBX: 0000000000000004 RCX: ffffffff93686020
RDX: dffffc0000000000 RSI: ffffffff8e6497f7 RDI: 0000000000000001
RBP: ffffc900040874b0 R08: ffffffff905fe577 R09: 1ffffffff20bfcae
R10: dffffc0000000000 R11: fffffbfff20bfcaf R12: ffffea0001ededc0
R13: ffffc90004087400 R14: 0000000000000000 R15: dffffc0000000000
FS: 0000555577940380(0000) GS:ffff888124f9a000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb2a265a1f0 CR3: 000000007eb78000 CR4: 0000000000350ef0
---
This report 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 syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.
If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
shaurya
Nov 30, 2025, 10:03:41 AMNov 30
to syzbot+4d3cc3...@syzkaller.appspotmail.com, ak...@linux-foundation.org, bra...@kernel.org, ha...@suse.de, linux-...@vger.kernel.org, linux-...@vger.kernel.org, linu...@kvack.org, mcg...@kernel.org, syzkall...@googlegroups.com, wi...@infradead.org
syzbot
Nov 30, 2025, 10:51:05 AMNov 30
to ak...@linux-foundation.org, bra...@kernel.org, ha...@suse.de, linux-...@vger.kernel.org, linux-...@vger.kernel.org, linu...@kvack.org, mcg...@kernel.org, ssran...@gmail.com, syzkall...@googlegroups.com, wi...@infradead.org
Hello,
syzbot has tested the proposed patch but the reproducer is still triggering an issue:
kernel BUG in mpage_readahead
------------[ cut here ]------------
kernel BUG at ./include/linux/pagemap.h:1408!
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:__readahead_folio include/linux/pagemap.h:1408 [inline]
RIP: 0010:readahead_folio include/linux/pagemap.h:1434 [inline]
RIP: 0010:mpage_readahead+0x4ad/0x5a0 fs/mpage.c:367
Code: 5e 41 5f c3 cc cc cc cc e8 b0 19 70 ff 48 89 ef e8 48 06 ad ff e9 54 fe ff ff 4c 8b 6c 24 18 e9 43 ff ff ff e8 94 19 70 ff 90 <0f> 0b e8 8c 19 70 ff 48 c7 c6 00 b6 80 8b 48 89 ef e8 1d 39 ba ff
RSP: 0018:ffffc9000d92f620 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffffc9000d92fae8 RCX: ffffffff824c7d14
RDX: ffff88802fe68000 RSI: ffffffff824c809c RDI: 0000000000000004
RBP: 0000000000000004 R08: 0000000000000004 R09: 0000000000000004
R10: 0000000000000001 R11: 0000000000000000 R12: dffffc0000000000
R13: fffff52001b25f61 R14: 0000000000000001 R15: 1ffff92001b25f61
FS: 0000555564bcd380(0000) GS:ffff888124f53000(0000) knlGS:0000000000000000
Call Trace:
<TASK>
read_pages+0x1c4/0xc70 mm/readahead.c:163
page_cache_ra_unbounded+0x66a/0xa10 mm/readahead.c:269
do_page_cache_ra mm/readahead.c:332 [inline]
page_cache_ra_order+0xc0b/0xf20 mm/readahead.c:542
do_sync_mmap_readahead mm/filemap.c:3340 [inline]
filemap_fault+0x1583/0x29a0 mm/filemap.c:3489
__do_fault+0x10d/0x490 mm/memory.c:5281
do_shared_fault mm/memory.c:5780 [inline]
do_fault mm/memory.c:5854 [inline]
do_pte_missing+0x1a6/0x3ba0 mm/memory.c:4362
handle_pte_fault mm/memory.c:6195 [inline]
__handle_mm_fault+0x1556/0x2aa0 mm/memory.c:6336
handle_mm_fault+0x589/0xd10 mm/memory.c:6505
do_user_addr_fault+0x60c/0x1370 arch/x86/mm/fault.c:1336
handle_page_fault arch/x86/mm/fault.c:1476 [inline]
exc_page_fault+0x64/0xc0 arch/x86/mm/fault.c:1532
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
RIP: 0033:0x7f082970586d
Code: 03 00 b9 03 10 12 00 45 31 c0 48 ba 80 00 00 00 00 20 00 00 48 b8 2f 64 65 76 2f 6e 75 6c 48 c7 c6 9c ff ff ff bf 01 01 00 00 <48> 89 02 48 b8 88 00 00 00 00 20 00 00 c7 00 6c 62 30 00 31 c0 e8
RSP: 002b:00007ffff735c180 EFLAGS: 00010246
RAX: 6c756e2f7665642f RBX: 0000000000000000 RCX: 0000000000121003
RDX: 0000200000000080 RSI: ffffffffffffff9c RDI: 0000000000000101
RBP: 00000000000f4240 R08: 0000000000000000 R09: 0000000000002000
R10: 0000000000000013 R11: 0000000000000206 R12: 0000000000079470
R13: 00007ffff735c19c R14: 00007ffff735c1b0 R15: 00007ffff735c1a0
RIP: 0010:readahead_folio include/linux/pagemap.h:1434 [inline]
RIP: 0010:mpage_readahead+0x4ad/0x5a0 fs/mpage.c:367
Code: 5e 41 5f c3 cc cc cc cc e8 b0 19 70 ff 48 89 ef e8 48 06 ad ff e9 54 fe ff ff 4c 8b 6c 24 18 e9 43 ff ff ff e8 94 19 70 ff 90 <0f> 0b e8 8c 19 70 ff 48 c7 c6 00 b6 80 8b 48 89 ef e8 1d 39 ba ff
RSP: 0018:ffffc9000d92f620 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffffc9000d92fae8 RCX: ffffffff824c7d14
RDX: ffff88802fe68000 RSI: ffffffff824c809c RDI: 0000000000000004
RBP: 0000000000000004 R08: 0000000000000004 R09: 0000000000000004
R10: 0000000000000001 R11: 0000000000000000 R12: dffffc0000000000
R13: fffff52001b25f61 R14: 0000000000000001 R15: 1ffff92001b25f61
FS: 0000555564bcd380(0000) GS:ffff888124f53000(0000) knlGS:0000000000000000
Tested on:
commit: 6bda50f4 Merge tag 'mips-fixes_6.18_2' of git://git.ke..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=11857514580000
kernel config: https://syzkaller.appspot.com/x/.config?x=f4a1ecf59be91960
dashboard link: https://syzkaller.appspot.com/bug?extid=4d3cc33ef7a77041efa6
compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
patch: https://syzkaller.appspot.com/x/patch.diff?x=10dc7cb4580000
syzbot has tested the proposed patch but the reproducer is still triggering an issue:
kernel BUG in mpage_readahead
------------[ cut here ]------------
kernel BUG at ./include/linux/pagemap.h:1408!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 1 UID: 0 PID: 18176 Comm: syz-executor317 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:__readahead_folio include/linux/pagemap.h:1408 [inline]
RIP: 0010:readahead_folio include/linux/pagemap.h:1434 [inline]
RIP: 0010:mpage_readahead+0x4ad/0x5a0 fs/mpage.c:367
Code: 5e 41 5f c3 cc cc cc cc e8 b0 19 70 ff 48 89 ef e8 48 06 ad ff e9 54 fe ff ff 4c 8b 6c 24 18 e9 43 ff ff ff e8 94 19 70 ff 90 <0f> 0b e8 8c 19 70 ff 48 c7 c6 00 b6 80 8b 48 89 ef e8 1d 39 ba ff
RSP: 0018:ffffc9000d92f620 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffffc9000d92fae8 RCX: ffffffff824c7d14
RDX: ffff88802fe68000 RSI: ffffffff824c809c RDI: 0000000000000004
RBP: 0000000000000004 R08: 0000000000000004 R09: 0000000000000004
R10: 0000000000000001 R11: 0000000000000000 R12: dffffc0000000000
R13: fffff52001b25f61 R14: 0000000000000001 R15: 1ffff92001b25f61
FS: 0000555564bcd380(0000) GS:ffff888124f53000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f08297b0130 CR3: 0000000030a16000 CR4: 00000000003526f0
Call Trace:
<TASK>
read_pages+0x1c4/0xc70 mm/readahead.c:163
page_cache_ra_unbounded+0x66a/0xa10 mm/readahead.c:269
do_page_cache_ra mm/readahead.c:332 [inline]
page_cache_ra_order+0xc0b/0xf20 mm/readahead.c:542
do_sync_mmap_readahead mm/filemap.c:3340 [inline]
filemap_fault+0x1583/0x29a0 mm/filemap.c:3489
__do_fault+0x10d/0x490 mm/memory.c:5281
do_shared_fault mm/memory.c:5780 [inline]
do_fault mm/memory.c:5854 [inline]
do_pte_missing+0x1a6/0x3ba0 mm/memory.c:4362
handle_pte_fault mm/memory.c:6195 [inline]
__handle_mm_fault+0x1556/0x2aa0 mm/memory.c:6336
handle_mm_fault+0x589/0xd10 mm/memory.c:6505
do_user_addr_fault+0x60c/0x1370 arch/x86/mm/fault.c:1336
handle_page_fault arch/x86/mm/fault.c:1476 [inline]
exc_page_fault+0x64/0xc0 arch/x86/mm/fault.c:1532
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
RIP: 0033:0x7f082970586d
Code: 03 00 b9 03 10 12 00 45 31 c0 48 ba 80 00 00 00 00 20 00 00 48 b8 2f 64 65 76 2f 6e 75 6c 48 c7 c6 9c ff ff ff bf 01 01 00 00 <48> 89 02 48 b8 88 00 00 00 00 20 00 00 c7 00 6c 62 30 00 31 c0 e8
RSP: 002b:00007ffff735c180 EFLAGS: 00010246
RAX: 6c756e2f7665642f RBX: 0000000000000000 RCX: 0000000000121003
RDX: 0000200000000080 RSI: ffffffffffffff9c RDI: 0000000000000101
RBP: 00000000000f4240 R08: 0000000000000000 R09: 0000000000002000
R10: 0000000000000013 R11: 0000000000000206 R12: 0000000000079470
R13: 00007ffff735c19c R14: 00007ffff735c1b0 R15: 00007ffff735c1a0
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__readahead_folio include/linux/pagemap.h:1408 [inline]
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:readahead_folio include/linux/pagemap.h:1434 [inline]
RIP: 0010:mpage_readahead+0x4ad/0x5a0 fs/mpage.c:367
Code: 5e 41 5f c3 cc cc cc cc e8 b0 19 70 ff 48 89 ef e8 48 06 ad ff e9 54 fe ff ff 4c 8b 6c 24 18 e9 43 ff ff ff e8 94 19 70 ff 90 <0f> 0b e8 8c 19 70 ff 48 c7 c6 00 b6 80 8b 48 89 ef e8 1d 39 ba ff
RSP: 0018:ffffc9000d92f620 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffffc9000d92fae8 RCX: ffffffff824c7d14
RDX: ffff88802fe68000 RSI: ffffffff824c809c RDI: 0000000000000004
RBP: 0000000000000004 R08: 0000000000000004 R09: 0000000000000004
R10: 0000000000000001 R11: 0000000000000000 R12: dffffc0000000000
R13: fffff52001b25f61 R14: 0000000000000001 R15: 1ffff92001b25f61
FS: 0000555564bcd380(0000) GS:ffff888124f53000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f08297b0130 CR3: 0000000030a16000 CR4: 00000000003526f0
Tested on:
commit: 6bda50f4 Merge tag 'mips-fixes_6.18_2' of git://git.ke..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=11857514580000
kernel config: https://syzkaller.appspot.com/x/.config?x=f4a1ecf59be91960
dashboard link: https://syzkaller.appspot.com/bug?extid=4d3cc33ef7a77041efa6
compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
patch: https://syzkaller.appspot.com/x/patch.diff?x=10dc7cb4580000
syzbot
7:06 AM (8 hours ago) 7:06 AM
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Subject: Re: [PATCH] mm/readahead: read min folio constraints under invalidate lock
Author: wangjin...@gmail.com
#syz test
syzkall...@googlegroups.com.
***
Subject: Re: [PATCH] mm/readahead: read min folio constraints under invalidate lock
Author: wangjin...@gmail.com
#syz test
syzbot
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