------------[ cut here ]------------ WARNING: CPU: 0 PID: 19819 at arch/x86/kernel/traps.c:943 exc_debug_kernel arch/x86/kernel/traps.c:943 [inline] WARNING: CPU: 0 PID: 19819 at arch/x86/kernel/traps.c:943 exc_debug+0xfc/0x140 arch/x86/kernel/traps.c:1025 Modules linked in: CPU: 0 PID: 19819 Comm: syz-executor.5 Not tainted 5.10.179 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:exc_debug_kernel arch/x86/kernel/traps.c:943 [inline] RIP: 0010:exc_debug+0xfc/0x140 arch/x86/kernel/traps.c:1025 Code: 10 5b 5d 41 5c e9 74 1e 3d 00 31 c0 0f 23 f8 e9 6c ff ff ff 48 89 e6 48 89 ef e8 df 5f 23 fd 84 c0 75 b7 f6 44 24 01 40 74 b0 <0f> 0b 48 81 a5 90 00 00 00 ff fe ff ff eb a1 80 e6 bf 48 89 14 24 RSP: 0018:fffffe0000016f28 EFLAGS: 00010002 RAX: 0000000000000000 RBX: 00000000000b0202 RCX: 0000000000000000 RDX: dffffc0000000000 RSI: 0000000000000008 RDI: ffff888046d7a274 RBP: fffffe0000016f58 R08: 0000000000000000 R09: 0000000000010000 R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f6ef5464700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffc87e86ff8 CR3: 0000000048196000 CR4: 0000000000350ef0 DR0: 0000000020000080 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Call Trace: <#DB> asm_exc_debug+0x19/0x30 arch/x86/include/asm/idtentry.h:604 RIP: 0010:copy_user_generic_string+0x2c/0x40 arch/x86/lib/copy_user_64.S:169 Code: cb 83 fa 08 72 27 89 f9 83 e1 07 74 15 83 e9 08 f7 d9 29 ca 8a 06 88 07 48 ff c6 48 ff c7 ff c9 75 f2 89 d1 c1 e9 03 83 e2 07 48 a5 89 d1 f3 a4 31 c0 0f 01 ca e9 53 3a 1f 02 0f 1f 00 0f 01 RSP: 0018:ffff888038b47bb8 EFLAGS: 00040246 RAX: 0000000000000001 RBX: 0000000000000010 RCX: 0000000000000001 RDX: 0000000000000000 RSI: 0000000020000088 RDI: ffff888038b47db8 RBP: ffff888038b47db0 R08: 0000000000000001 R09: ffff888038b47dbf R10: ffffed1007168fb7 R11: 0000000000000001 R12: 0000000020000090 R13: 0000000020000080 R14: 00007ffffffff000 R15: 0000000000000000 copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline] raw_copy_from_user arch/x86/include/asm/uaccess_64.h:52 [inline] _copy_from_user+0x172/0x1b0 lib/usercopy.c:23 copy_from_user include/linux/uaccess.h:192 [inline] copy_iovec_from_user lib/iov_iter.c:1687 [inline] iovec_from_user lib/iov_iter.c:1722 [inline] iovec_from_user+0x141/0x400 lib/iov_iter.c:1697 __import_iovec+0x67/0x590 lib/iov_iter.c:1740 import_iovec+0x83/0xb0 lib/iov_iter.c:1805 vfs_readv+0xbb/0x160 fs/read_write.c:919 do_readv+0x139/0x300 fs/read_write.c:958 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xc6 RIP: 0033:0x7f6ef7eeeb19 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:00007f6ef5464188 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 RAX: ffffffffffffffda RBX: 00007f6ef8001f60 RCX: 00007f6ef7eeeb19 RDX: 0000000000000001 RSI: 0000000020000080 RDI: 0000000000000006 RBP: 00007f6ef7f48f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc7685851f R14: 00007f6ef5464300 R15: 0000000000022000 irq event stamp: 1168 hardirqs last enabled at (1167): [] syscall_enter_from_user_mode+0x1d/0x50 kernel/entry/common.c:98 hardirqs last disabled at (1168): [] exc_debug_kernel arch/x86/kernel/traps.c:890 [inline] hardirqs last disabled at (1168): [] exc_debug+0x5a/0x140 arch/x86/kernel/traps.c:1025 softirqs last enabled at (1020): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (1007): [] asm_call_irq_on_stack+0x12/0x20 ---[ end trace 6fc8d3e29f07b7ed ]--- Module has invalid ELF structures ---------------- Code disassembly (best guess): 0: cb lret 1: 83 fa 08 cmp $0x8,%edx 4: 72 27 jb 0x2d 6: 89 f9 mov %edi,%ecx 8: 83 e1 07 and $0x7,%ecx b: 74 15 je 0x22 d: 83 e9 08 sub $0x8,%ecx 10: f7 d9 neg %ecx 12: 29 ca sub %ecx,%edx 14: 8a 06 mov (%rsi),%al 16: 88 07 mov %al,(%rdi) 18: 48 ff c6 inc %rsi 1b: 48 ff c7 inc %rdi 1e: ff c9 dec %ecx 20: 75 f2 jne 0x14 22: 89 d1 mov %edx,%ecx 24: c1 e9 03 shr $0x3,%ecx 27: 83 e2 07 and $0x7,%edx * 2a: f3 48 a5 rep movsq %ds:(%rsi),%es:(%rdi) <-- trapping instruction 2d: 89 d1 mov %edx,%ecx 2f: f3 a4 rep movsb %ds:(%rsi),%es:(%rdi) 31: 31 c0 xor %eax,%eax 33: 0f 01 ca clac 36: e9 53 3a 1f 02 jmpq 0x21f3a8e 3b: 0f 1f 00 nopl (%rax) 3e: 0f .byte 0xf 3f: 01 .byte 0x1