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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+0x8c1/0xd70 fs/gfs2/file.c:995
Read of size 8 at addr ffffc9000344fb30 by task syz.1.104/4799

CPU: 0 PID: 4799 Comm: syz.1.104 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x168/0x230 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+0x8c1/0xd70 fs/gfs2/file.c:995
 __kernel_read+0x4eb/0x910 fs/read_write.c:443
 kernel_read_file+0x4ad/0x6a0 fs/kernel_read_file.c:93
 kernel_read_file_from_fd+0xbb/0x120 fs/kernel_read_file.c:184
 __do_sys_finit_module kernel/module.c:4240 [inline]
 __se_sys_finit_module+0x102/0x1b0 kernel/module.c:4224
 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: 0033:0x7fe30b2cb749
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:00007fe309532038 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
RAX: ffffffffffffffda RBX: 00007fe30b521fa0 RCX: 00007fe30b2cb749
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 00007fe30b34ff91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe30b522038 R14: 00007fe30b521fa0 R15: 00007ffdebde2e58
 </TASK>


addr ffffc9000344fb30 is located in stack of task syz.1.104/4799 at offset 48 in frame:
 __kernel_read+0x0/0x910

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

Memory state around the buggy address:
 ffffc9000344fa00: 00 00 00 f3 f3 f3 f3 f3 00 00 00 00 00 00 00 00
 ffffc9000344fa80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffc9000344fb00: f1 f1 f1 f1 00 00 f2 f2 00 00 00 00 00 00 f2 f2
                                     ^
 ffffc9000344fb80: f2 f2 00 00 00 00 00 f3 f3 f3 f3 f3 00 00 00 00
 ffffc9000344fc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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