FAULT_INJECTION: forcing a failure.
name fail_usercopy, interval 1, probability 0, space 0, times 1
CPU: 1 PID: 27897 Comm: syz-executor.5 Not tainted 6.0.0-rc1-next-20220822 #1
BUG: sleeping function called from invalid context at kernel/locking/rwsem.c:1521
in_atomic(): 0, irqs_disabled(): 1, non_block: 0, pid: 27897, name: syz-executor.5
preempt_count: 0, expected: 0
RCU nest depth: 0, expected: 0
no locks held by syz-executor.5/27897.
irq event stamp: 518
hardirqs last  enabled at (517): [<ffffffff812be918>] __up_console_sem+0x78/0x80
hardirqs last disabled at (518): [<ffffffff841214f5>] dump_stack_lvl+0x2e/0xb3
softirqs last  enabled at (512): [<ffffffff8116ca6b>] __irq_exit_rcu+0x11b/0x180
softirqs last disabled at (507): [<ffffffff8116ca6b>] __irq_exit_rcu+0x11b/0x180
CPU: 1 PID: 27897 Comm: syz-executor.5 Not tainted 6.0.0-rc1-next-20220822 #1
syz-executor.5[27897] cmdline: /syz-executor.5 exec
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0x8b/0xb3
 __might_resched.cold+0x222/0x26b
 down_read_killable+0x75/0x490
 __access_remote_vm+0xac/0x6f0
 get_mm_cmdline.part.0+0x214/0x600
 get_task_cmdline_kernel+0x1e9/0x230
 dump_stack_print_cmdline.part.0+0x82/0x150
 dump_stack_print_info+0x185/0x190
 dump_stack_lvl+0x7f/0xb3
 should_fail.cold+0x5/0xa
 _copy_from_user+0x2a/0x170
 move_addr_to_kernel.part.0+0x31/0x110
 __sys_sendto+0x183/0x340
 __x64_sys_sendto+0xdd/0x1b0
 do_syscall_64+0x3b/0x90
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fb55ed898ac
Code: fa fa ff ff 44 8b 4c 24 2c 4c 8b 44 24 20 89 c5 44 8b 54 24 28 48 8b 54 24 18 b8 2c 00 00 00 48 8b 74 24 10 8b 7c 24 08 0f 05 <48> 3d 00 f0 ff ff 77 34 89 ef 48 89 44 24 08 e8 20 fb ff ff 48 8b
RSP: 002b:00007fb55c34b020 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007fb55c34b110 RCX: 00007fb55ed898ac
RDX: 0000000000000020 RSI: 00007fb55c34b160 RDI: 0000000000000005
RBP: 0000000000000000 R08: 00007fb55c34b074 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 00007fb55c34b0c8
R13: 00007fb55c34b160 R14: 0000000000000005 R15: 0000000000000000
 </TASK>
syz-executor.5[27897] cmdline: /syz-executor.5 exec
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0x8b/0xb3
 should_fail.cold+0x5/0xa
 _copy_from_user+0x2a/0x170
 move_addr_to_kernel.part.0+0x31/0x110
 __sys_sendto+0x183/0x340
 __x64_sys_sendto+0xdd/0x1b0
 do_syscall_64+0x3b/0x90
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fb55ed898ac
Code: fa fa ff ff 44 8b 4c 24 2c 4c 8b 44 24 20 89 c5 44 8b 54 24 28 48 8b 54 24 18 b8 2c 00 00 00 48 8b 74 24 10 8b 7c 24 08 0f 05 <48> 3d 00 f0 ff ff 77 34 89 ef 48 89 44 24 08 e8 20 fb ff ff 48 8b
RSP: 002b:00007fb55c34b020 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007fb55c34b110 RCX: 00007fb55ed898ac
RDX: 0000000000000020 RSI: 00007fb55c34b160 RDI: 0000000000000005
RBP: 0000000000000000 R08: 00007fb55c34b074 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 00007fb55c34b0c8
R13: 00007fb55c34b160 R14: 0000000000000005 R15: 0000000000000000
 </TASK>
tmpfs: Bad value for 'mpol'
tmpfs: Bad value for 'mpol'
netlink: 'syz-executor.5': attribute type 8 has an invalid length.
netlink: 8 bytes leftover after parsing attributes in process `syz-executor.5'.
netlink: 'syz-executor.5': attribute type 8 has an invalid length.
netlink: 8 bytes leftover after parsing attributes in process `syz-executor.5'.
serio: Serial port tty23
serio: Serial port tty23
serio: Serial port tty23
serio: Serial port tty23
serio: Serial port tty23
Zero length message leads to an empty skb