------------[ cut here ]------------ WARNING: CPU: 1 PID: 6919 at lib/iov_iter.c:274 _copy_from_iter+0x38c/0x10f0 lib/iov_iter.c:274 Modules linked in: CPU: 1 PID: 6919 Comm: syz-executor.1 Not tainted 6.8.0-rc1-syzkaller-00026-g7ed2632ec7d7 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 RIP: 0010:_copy_from_iter+0x38c/0x10f0 lib/iov_iter.c:274 Code: 78 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 db fe ff ff e8 45 41 20 fd 90 <0f> 0b 90 45 31 e4 e9 25 ff ff ff e8 34 41 20 fd 48 8b 14 24 4c 89 RSP: 0018:ffffc900202a7460 EFLAGS: 00010283 RAX: 0000000000005bd6 RBX: 0000000000000000 RCX: ffffc90003b09000 RDX: 0000000000040000 RSI: ffffffff8467e11b RDI: 0000000000000001 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 00000000000000c0 R13: ffffea0001343c00 R14: ffffc900202a7678 R15: 00000000000000c0 FS: 0000000000000000(0000) GS:ffff88802c700000(0063) knlGS:00000000f7ff0b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000f73258ec CR3: 0000000023bd3000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> copy_page_from_iter lib/iov_iter.c:441 [inline] copy_page_from_iter+0xa5/0x120 lib/iov_iter.c:430 bio_copy_from_iter block/blk-map.c:56 [inline] bio_copy_user_iov block/blk-map.c:211 [inline] blk_rq_map_user_iov+0x9e7/0x1840 block/blk-map.c:661 blk_rq_map_user_io.part.0+0x276/0x2c0 block/blk-map.c:719 blk_rq_map_user_io+0xe6/0x230 block/blk-map.c:700 sg_start_req drivers/scsi/sg.c:1817 [inline] sg_common_write.constprop.0+0xd61/0x1c90 drivers/scsi/sg.c:803 sg_new_write.isra.0+0x546/0xaa0 drivers/scsi/sg.c:770 sg_ioctl_common drivers/scsi/sg.c:935 [inline] sg_ioctl+0x1814/0x2760 drivers/scsi/sg.c:1160 compat_ptr_ioctl+0x71/0xa0 fs/ioctl.c:910 __do_compat_sys_ioctl+0x2bf/0x330 fs/ioctl.c:971 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x79/0x110 arch/x86/entry/common.c:321 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:346 entry_SYSENTER_compat_after_hwframe+0x70/0x7a RIP: 0023:0xf7ff5579 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:00000000f7ff05ac EFLAGS: 00000292 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000002285 RDX: 0000000020000080 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 </TASK> ---------------- 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