R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ------------[ cut here ]------------ WARNING: CPU: 3 PID: 6475 at lib/iov_iter.c:255 _copy_from_iter+0x39b/0x1400 lib/iov_iter.c:255 Modules linked in: CPU: 3 UID: 0 PID: 6475 Comm: syz.3.140 Not tainted 6.13.0-rc3-syzkaller-00017-gf44d154d6e3d #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:_copy_from_iter+0x39b/0x1400 lib/iov_iter.c:255 Code: 64 fd 0f 01 cb 4c 89 f9 4c 89 f7 48 89 de f3 a4 0f 1f 00 48 89 cb 0f 01 ca 4d 89 fc 49 29 cc e9 1d ff ff ff e8 66 6b 02 fd 90 <0f> 0b 90 e9 ae fd ff ff e8 58 6b 02 fd 89 de bf 01 00 00 00 e8 2c RSP: 0018:ffffc9000fa66ee8 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff8496e0a8 RDX: ffff888021a9c880 RSI: ffffffff8496e38a RDI: 0000000000000001 RBP: 0000000000000020 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000003 R12: ffff88806b56a060 R13: ffff88806b24a280 R14: ffff88806b56a060 R15: 0000000000000020 FS: 0000000000000000(0000) GS:ffff88802b700000(0063) knlGS:00000000f5116b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 000000005761399c CR3: 000000006c658000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: copy_from_iter include/linux/uio.h:219 [inline] copy_from_iter_full include/linux/uio.h:236 [inline] pdu_write_u net/9p/protocol.c:234 [inline] p9pdu_vwritef+0x2cb/0x21d0 net/9p/protocol.c:614 p9_client_prepare_req+0x244/0x4d0 net/9p/client.c:651 p9_client_rpc+0x1c3/0xc10 net/9p/client.c:691 p9_client_write+0x31f/0x680 net/9p/client.c:1645 v9fs_issue_write+0xe2/0x180 fs/9p/vfs_addr.c:59 netfs_do_issue_write+0x92/0x110 fs/netfs/write_issue.c:233 netfs_issue_write fs/netfs/write_issue.c:260 [inline] netfs_advance_write fs/netfs/write_issue.c:301 [inline] netfs_advance_write+0x384/0xc80 fs/netfs/write_issue.c:269 netfs_write_folio+0xc19/0x1930 fs/netfs/write_issue.c:485 netfs_writepages+0x29a/0x8f0 fs/netfs/write_issue.c:581 do_writepages+0x1b3/0x820 mm/page-writeback.c:2702 filemap_fdatawrite_wbc mm/filemap.c:397 [inline] filemap_fdatawrite_wbc+0x104/0x160 mm/filemap.c:387 __filemap_fdatawrite_range+0xb3/0xf0 mm/filemap.c:430 file_write_and_wait_range+0xca/0x140 mm/filemap.c:787 v9fs_file_fsync+0xdb/0x1c0 fs/9p/vfs_file.c:418 vfs_fsync_range+0x136/0x220 fs/sync.c:187 generic_write_sync include/linux/fs.h:2904 [inline] netfs_file_write_iter+0x3dd/0x4f0 fs/netfs/buffered_write.c:487 v9fs_file_write_iter+0x9b/0x100 fs/9p/vfs_file.c:407 new_sync_write fs/read_write.c:586 [inline] vfs_write+0x5ae/0x1150 fs/read_write.c:679 ksys_write+0x12b/0x250 fs/read_write.c:731 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf7fc2579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f511655c EFLAGS: 00000296 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 0000000000000007 RCX: 0000000020000180 RDX: 0000000000000020 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 10 06 adc %al,(%rsi) 2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi 6: 10 07 adc %al,(%rdi) 8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi c: 10 08 adc %cl,(%rax) e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi 1e: 00 51 52 add %dl,0x52(%rcx) 21: 55 push %rbp 22: 89 e5 mov %esp,%ebp 24: 0f 34 sysenter 26: cd 80 int $0x80 * 28: 5d pop %rbp <-- trapping instruction 29: 5a pop %rdx 2a: 59 pop %rcx 2b: c3 ret 2c: 90 nop 2d: 90 nop 2e: 90 nop 2f: 90 nop 30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi