[moderation/CI] Re: mm/fadvise: validate offset in generic_fadvise

[syzbot ci]

syzbot ci has tested the following series

[v1] mm/fadvise: validate offset in generic_fadvise
https://lore.kernel.org/all/20251222141817.13...@gmail.com
* [PATCH] mm/fadvise: validate offset in generic_fadvise

and found the following issue:
kernel BUG in txEnd

Full report is available here:
https://ci.syzbot.org/series/fc87bf1f-7746-42da-971b-80c1c5d45fa5

***

kernel BUG in txEnd

tree: mm-new
URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/akpm/mm.git
base: c642ecda5b136882e518d8303863473c0d21ab2f
arch: amd64
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
config: https://ci.syzbot.org/builds/f150d8b9-3b52-4d7f-8778-6840ac1c08ab/config
syz repro: https://ci.syzbot.org/findings/e8d4e924-8db8-410f-aa5a-5372cef5866c/syz_repro

ERROR: (device loop0): xtTruncate: xt_getpage: xtree page corrupt
BUG at fs/jfs/jfs_txnmgr.c:529 assert(tblk->next == 0)
------------[ cut here ]------------
kernel BUG at fs/jfs/jfs_txnmgr.c:529!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 6257 Comm: syz.0.86 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:txEnd+0x51f/0x530 fs/jfs/jfs_txnmgr.c:529
Code: e9 cc fe ff ff e8 51 24 75 fe 48 c7 c7 20 94 a5 8b 48 c7 c6 19 90 a5 8b ba 11 02 00 00 48 c7 c1 60 94 a5 8b e8 b2 12 db fd 90 <0f> 0b 66 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90
RSP: 0018:ffffc900035b73a0 EFLAGS: 00010246
RAX: 0000000000000036 RBX: ffff8881168ab000 RCX: a45a110d5a473f00
RDX: 0000000000000000 RSI: 0000000080000001 RDI: 0000000000000000
RBP: ffffc90002af1a22 R08: ffff88823c6247d3 R09: 1ffff110478c48fa
R10: dffffc0000000000 R11: ffffed10478c48fb R12: 1ffff9200055e349
R13: dffffc0000000000 R14: ffffc90002af1a48 R15: 00000000000000ca
FS: 00007f86e7afa6c0(0000) GS:ffff8882a9e32000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000005ff0 CR3: 0000000110ef0000 CR4: 00000000000006f0
Call Trace:
<TASK>
jfs_truncate_nolock+0x2b6/0x340 fs/jfs/inode.c:399
jfs_truncate fs/jfs/inode.c:420 [inline]
jfs_write_failed+0x119/0x190 fs/jfs/inode.c:295
jfs_direct_IO+0x1f4/0x220 fs/jfs/inode.c:350
generic_file_direct_write+0x1db/0x3e0 mm/filemap.c:4248
__generic_file_write_iter+0x11d/0x230 mm/filemap.c:4417
generic_file_write_iter+0x117/0x550 mm/filemap.c:4457
iter_file_splice_write+0x972/0x10b0 fs/splice.c:738
do_splice_from fs/splice.c:938 [inline]
direct_splice_actor+0x101/0x160 fs/splice.c:1161
splice_direct_to_actor+0x5a8/0xcc0 fs/splice.c:1105
do_splice_direct_actor fs/splice.c:1204 [inline]
do_splice_direct+0x181/0x270 fs/splice.c:1230
do_sendfile+0x4da/0x7e0 fs/read_write.c:1370
__do_sys_sendfile64 fs/read_write.c:1431 [inline]
__se_sys_sendfile64+0x13e/0x190 fs/read_write.c:1417
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f86e6b8f7c9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f86e7afa038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f86e6de5fa0 RCX: 00007f86e6b8f7c9
RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000004
RBP: 00007f86e6bf297f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000020fffe85 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f86e6de6038 R14: 00007f86e6de5fa0 R15: 00007ffff03138d8
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:txEnd+0x51f/0x530 fs/jfs/jfs_txnmgr.c:529
Code: e9 cc fe ff ff e8 51 24 75 fe 48 c7 c7 20 94 a5 8b 48 c7 c6 19 90 a5 8b ba 11 02 00 00 48 c7 c1 60 94 a5 8b e8 b2 12 db fd 90 <0f> 0b 66 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90
RSP: 0018:ffffc900035b73a0 EFLAGS: 00010246
RAX: 0000000000000036 RBX: ffff8881168ab000 RCX: a45a110d5a473f00
RDX: 0000000000000000 RSI: 0000000080000001 RDI: 0000000000000000
RBP: ffffc90002af1a22 R08: ffff88823c6247d3 R09: 1ffff110478c48fa
R10: dffffc0000000000 R11: ffffed10478c48fb R12: 1ffff9200055e349
R13: dffffc0000000000 R14: ffffc90002af1a48 R15: 00000000000000ca
FS: 00007f86e7afa6c0(0000) GS:ffff8882a9e32000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000005ff0 CR3: 0000000110ef0000 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: syz...@syzkaller.appspotmail.com

---
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