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BUG: KASAN: stack-out-of-bounds in iov_iter_revert lib/iov_iter.c:1093 [inline]
BUG: KASAN: stack-out-of-bounds in iov_iter_revert+0x803/0x900 lib/iov_iter.c:1033
Read of size 8 at addr ffffc90018f578b0 by task syz-executor.5/11494

CPU: 0 PID: 11494 Comm: syz-executor.5 Not tainted 5.14.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:105
 print_address_description.constprop.0.cold+0xf/0x2d6 mm/kasan/report.c:233
 __kasan_report mm/kasan/report.c:419 [inline]
 kasan_report.cold+0x83/0xdf mm/kasan/report.c:436
 iov_iter_revert lib/iov_iter.c:1093 [inline]
 iov_iter_revert+0x803/0x900 lib/iov_iter.c:1033
 io_write+0x57b/0xed0 fs/io_uring.c:3465
 io_issue_sqe+0x28c/0x6920 fs/io_uring.c:6187
 __io_queue_sqe+0x1ac/0xf00 fs/io_uring.c:6470
 io_queue_sqe fs/io_uring.c:6513 [inline]
 io_submit_sqe fs/io_uring.c:6668 [inline]
 io_submit_sqes+0x63ea/0x7bc0 fs/io_uring.c:6784
 __do_sys_io_uring_enter+0xf3c/0x1ed0 fs/io_uring.c:9392
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665f9
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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f5d6872c188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665f9
RDX: 0000000000000000 RSI: 00000000000062b2 RDI: 0000000000000003
RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007fffa5b520bf R14: 00007f5d6872c300 R15: 0000000000022000


addr ffffc90018f578b0 is located in stack of task syz-executor.5/11494 at offset 152 in frame:
 io_write+0x0/0xed0 fs/io_uring.c:3341

this frame has 3 objects:
 [48, 56) 'iovec'
 [80, 120) '__iter'
 [160, 288) 'inline_vecs'

Memory state around the buggy address:
 ffffc90018f57780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc90018f57800: 00 00 00 f1 f1 f1 f1 00 00 00 f2 f2 f2 00 00 00
>ffffc90018f57880: 00 00 f2 f2 f2 f2 f2 00 00 00 00 00 00 00 00 00
                                     ^
 ffffc90018f57900: 00 00 00 00 00 00 00 f3 f3 f3 f3 00 00 00 00 00
 ffffc90018f57980: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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