R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ------------[ cut here ]------------ WARNING: CPU: 0 PID: 6700 at lib/iov_iter.c:255 _copy_from_iter+0x390/0x13e0 lib/iov_iter.c:255 Modules linked in: CPU: 0 UID: 0 PID: 6700 Comm: syz.0.430 Not tainted 6.12.0-rc3-syzkaller-00454-gdb87114dcf13 #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+0x390/0x13e0 lib/iov_iter.c:255 Code: 66 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 28 ff ff ff e8 a1 4d 05 fd 90 <0f> 0b 90 e9 b9 fd ff ff e8 93 4d 05 fd 89 de bf 01 00 00 00 e8 67 RSP: 0018:ffffc9000358efc8 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff848767d8 RDX: ffff8880215b8000 RSI: ffffffff84876aaf RDI: 0000000000000001 RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff88802a7787e0 R13: ffff8880601ff050 R14: ffff88802a7787e0 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff88802b400000(0063) knlGS:00000000f5726b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000f71e18e0 CR3: 000000004fdd2000 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:1643 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_write_folio+0x82f/0x1930 fs/netfs/write_issue.c:505 netfs_end_writethrough+0x53/0x170 fs/netfs/write_issue.c:672 netfs_perform_write+0x1b1c/0x21a0 fs/netfs/buffered_write.c:385 netfs_buffered_write_iter_locked fs/netfs/buffered_write.c:445 [inline] netfs_file_write_iter+0x432/0x4f0 fs/netfs/buffered_write.c:484 v9fs_file_write_iter+0x9b/0x100 fs/9p/vfs_file.c:407 aio_write+0x3b2/0x8c0 fs/aio.c:1633 __io_submit_one fs/aio.c:2005 [inline] io_submit_one+0x1248/0x1da0 fs/aio.c:2052 __do_compat_sys_io_submit fs/aio.c:2153 [inline] __se_compat_sys_io_submit fs/aio.c:2123 [inline] __ia32_compat_sys_io_submit+0x1af/0x390 fs/aio.c:2123 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: 0023:0xf7fa6579 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:00000000f572656c EFLAGS: 00000296 ORIG_RAX: 00000000000000f8 RAX: ffffffffffffffda RBX: 00000000f7438000 RCX: 0000000000000001 RDX: 0000000020000040 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