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BUG: KASAN: stack-out-of-bounds in should_fault_in_pages fs/gfs2/file.c:784 [inline]
BUG: KASAN: stack-out-of-bounds in gfs2_file_read_iter+0x938/0xe40 fs/gfs2/file.c:994
Read of size 8 at addr ffffc90003506d90 by task syz.3.25/3868

CPU: 1 PID: 3868 Comm: syz.3.25 Not tainted 5.15.167-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106
 print_address_description+0x63/0x3b0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:434 [inline]
 kasan_report+0x16b/0x1c0 mm/kasan/report.c:451
 should_fault_in_pages fs/gfs2/file.c:784 [inline]
 gfs2_file_read_iter+0x938/0xe40 fs/gfs2/file.c:994
 __kernel_read+0x5ac/0xa60 fs/read_write.c:443
 integrity_kernel_read+0xac/0xf0 security/integrity/iint.c:228
 ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:485 [inline]
 ima_calc_file_shash security/integrity/ima/ima_crypto.c:516 [inline]
 ima_calc_file_hash+0xa5d/0x1c00 security/integrity/ima/ima_crypto.c:573
 ima_collect_measurement+0x37e/0x800 security/integrity/ima/ima_api.c:255
 process_measurement+0x1363/0x21c0 security/integrity/ima/ima_main.c:351
 ima_file_check+0xf3/0x180 security/integrity/ima/ima_main.c:533
 do_open fs/namei.c:3610 [inline]
 path_openat+0x2748/0x2f20 fs/namei.c:3742
 do_filp_open+0x21c/0x460 fs/namei.c:3769
 do_sys_openat2+0x13b/0x4f0 fs/open.c:1253
 do_sys_open fs/open.c:1269 [inline]
 __do_sys_open fs/open.c:1277 [inline]
 __se_sys_open fs/open.c:1273 [inline]
 __x64_sys_open+0x221/0x270 fs/open.c:1273
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f04fe63bef9
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:00007f04fca72038 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007f04fe7f4130 RCX: 00007f04fe63bef9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000000
RBP: 00007f04fe6aeb76 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f04fe7f4130 R15: 00007fffc85c0018
 </TASK>


addr ffffc90003506d90 is located in stack of task syz.3.25/3868 at offset 48 in frame:
 __kernel_read+0x0/0xa60

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

Memory state around the buggy address:
 ffffc90003506c80: f3 f3 f3 f3 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc90003506d00: 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1
>ffffc90003506d80: 00 00 f2 f2 00 00 00 00 00 00 f2 f2 f2 f2 00 00
                         ^
 ffffc90003506e00: 00 00 00 f3 f3 f3 f3 f3 00 00 00 00 00 00 00 00
 ffffc90003506e80: 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 f3 f3 f3
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