FAULT_INJECTION: forcing a failure. name fail_usercopy, interval 1, probability 0, space 0, times 1 CPU: 1 PID: 6975 Comm: syz-executor.3 Not tainted 6.0.0-rc1-next-20220819 #1 BUG: sleeping function called from invalid context at kernel/locking/rwsem.c:1521 in_atomic(): 0, irqs_disabled(): 1, non_block: 0, pid: 6975, name: syz-executor.3 preempt_count: 0, expected: 0 RCU nest depth: 0, expected: 0 no locks held by syz-executor.3/6975. irq event stamp: 256 hardirqs last enabled at (255): [<ffffffff812bd8c8>] __up_console_sem+0x78/0x80 hardirqs last disabled at (256): [<ffffffff8411f196>] dump_stack_lvl+0x2e/0xb3 softirqs last enabled at (210): [<ffffffff8116ba5b>] __irq_exit_rcu+0x11b/0x180 softirqs last disabled at (181): [<ffffffff8116ba5b>] __irq_exit_rcu+0x11b/0x180 CPU: 1 PID: 6975 Comm: syz-executor.3 Not tainted 6.0.0-rc1-next-20220819 #1 syz-executor.3[6975] cmdline: /syz-executor.3 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 copyin+0x19/0x120 _copy_from_iter+0x1d2/0x1210 copy_page_from_iter+0x24c/0x510 tun_build_skb+0x2d2/0x1130 tun_get_user+0x6fb/0x3620 tun_chr_write_iter+0xdb/0x1e0 vfs_write+0x9c3/0xd90 ksys_write+0x127/0x250 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f9c82fe85ff Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 99 fd ff ff 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 cc fd ff ff 48 RSP: 002b:00007f9c805ab150 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f9c83148f60 RCX: 00007f9c82fe85ff RDX: 0000000000000022 RSI: 0000000020000100 RDI: 00000000000000f0 RBP: 00007f9c805ab1d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000001 R13: 00007fff9ee1b90f R14: 00007f9c805ab300 R15: 0000000000022000 </TASK> syz-executor.3[6975] cmdline: /syz-executor.3 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 copyin+0x19/0x120 _copy_from_iter+0x1d2/0x1210 copy_page_from_iter+0x24c/0x510 tun_build_skb+0x2d2/0x1130 tun_get_user+0x6fb/0x3620 tun_chr_write_iter+0xdb/0x1e0 vfs_write+0x9c3/0xd90 ksys_write+0x127/0x250 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f9c82fe85ff Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 99 fd ff ff 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 cc fd ff ff 48 RSP: 002b:00007f9c805ab150 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f9c83148f60 RCX: 00007f9c82fe85ff RDX: 0000000000000022 RSI: 0000000020000100 RDI: 00000000000000f0 RBP: 00007f9c805ab1d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000001 R13: 00007fff9ee1b90f R14: 00007f9c805ab300 R15: 0000000000022000 </TASK>