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BUG: KASAN: stack-out-of-bounds in should_fault_in_pages fs/gfs2/file.c:785 [inline]
BUG: KASAN: stack-out-of-bounds in gfs2_file_read_iter+0x8e1/0xda0 fs/gfs2/file.c:995
Read of size 8 at addr ffffc9000326fd50 by task syz.1.21/4363

CPU: 1 PID: 4363 Comm: syz.1.21 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106
 print_address_description+0x60/0x2d0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:434 [inline]
 kasan_report+0xdf/0x130 mm/kasan/report.c:451
 should_fault_in_pages fs/gfs2/file.c:785 [inline]
 gfs2_file_read_iter+0x8e1/0xda0 fs/gfs2/file.c:995
 call_read_iter include/linux/fs.h:2167 [inline]
 new_sync_read fs/read_write.c:404 [inline]
 vfs_read+0x759/0xd60 fs/read_write.c:485
 ksys_read+0x152/0x260 fs/read_write.c:623
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f1f62056e59
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:00007f1f6028f028 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007f1f622d0090 RCX: 00007f1f62056e59
RDX: 0000000000002020 RSI: 0000200000001300 RDI: 0000000000000004
RBP: 00007f1f620ecd6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1f622d0128 R14: 00007f1f622d0090 R15: 00007fff4869f628
 </TASK>


addr ffffc9000326fd50 is located in stack of task syz.1.21/4363 at offset 48 in frame:
 vfs_read+0x0/0xd60

this frame has 3 objects:
 [32, 48) 'iov.i'
 [64, 112) 'kiocb.i'
 [144, 184) 'iter.i'

Memory state around the buggy address:
 ffffc9000326fc00: 00 00 00 00 00 00 00 f3 f3 f3 f3 f3 00 00 00 00
 ffffc9000326fc80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffc9000326fd00: 00 00 00 00 f1 f1 f1 f1 00 00 f2 f2 00 00 00 00
                                                 ^
 ffffc9000326fd80: 00 00 f2 f2 f2 f2 00 00 00 00 00 f3 f3 f3 f3 f3
 ffffc9000326fe00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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