Re: [syzbot] [mm?] WARNING in ep_write_iter

syzbot has found a reproducer for the following issue on:

HEAD commit:    8d3ae59288f1 Linux 7.2
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=13bad949580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=1d67342c314f228d
dashboard link: https://syzkaller.appspot.com/bug?extid=805630f1453e490427fa
compiler:       gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1637ea25580000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: [email protected]

gadgetfs: bound to dummy_udc driver
------------[ cut here ]------------
1
WARNING: mm/page_alloc.c:5280 at __alloc_frozen_pages_noprof+0x2427/0x2dc0 mm/page_alloc.c:5280, CPU#2: syz-executor421/6034
Modules linked in:
CPU: 2 UID: 0 PID: 6034 Comm: syz-executor421 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:__alloc_frozen_pages_noprof+0x2427/0x2dc0 mm/page_alloc.c:5280
Code: e9 8d fb ff ff 31 d2 be 28 12 00 00 48 c7 c7 a0 74 01 8c e8 7b 95 68 ff 2e 2e 2e 31 c0 e9 02 ed ff ff c6 05 85 90 bc 0e 01 90 <0f> 0b 90 e9 6f df ff ff 48 c7 c7 80 be f3 8e 45 89 f7 44 8b 74 24
RSP: 0018:ffffc900048c7810 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 1ffff92000918f1c RDI: 0000000000040cc0
RBP: 0000000000000013 R08: 0000000000000005 R09: 0000000000000009
R10: 0000000000000013 R11: 0000000000000000 R12: 0000000000040cc0
R13: 1ffff92000918f5a R14: ffffffff9b95c444 R15: 0000000000000001
FS:  00005555738a6400(0000) GS:ffff8880d5dde000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd5f5d6fe8 CR3: 0000000020943000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 alloc_pages_mpol+0x1fb/0x540 mm/mempolicy.c:2490
 ___kmalloc_large_node+0xe5/0x120 mm/slub.c:5274
 __kmalloc_large_node_noprof+0x1c/0x70 mm/slub.c:5305
 __do_kmalloc_node mm/slub.c:5322 [inline]
 __kmalloc_noprof+0x5a1/0x820 mm/slub.c:5359
 _kmalloc_noprof include/linux/slab.h:992 [inline]
 ep_write_iter+0x180/0xbc0 drivers/usb/gadget/legacy/inode.c:669
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x6ac/0x1050 fs/read_write.c:687
 ksys_write+0x12a/0x250 fs/read_write.c:739
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7cc18b5cb7
Code: 48 89 fa 4c 89 df e8 98 1d 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
RSP: 002b:00007ffd5f5d76e0 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00005555738a6400 RCX: 00007f7cc18b5cb7
RDX: 000000007fffffff RSI: 0000000000000000 RDI: 0000000000000004
RBP: 00007ffd5f5d7730 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffd5f5d7930
R13: 00007f7cc18ea039 R14: 00007ffd5f5d7b30 R15: 0000000000000002
 </TASK>


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