FAULT_INJECTION: forcing a failure. name fail_usercopy, interval 1, probability 0, space 0, times 1 CPU: 0 PID: 4843 Comm: syz-executor.5 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: 4843, name: syz-executor.5 preempt_count: 0, expected: 0 RCU nest depth: 0, expected: 0 no locks held by syz-executor.5/4843. irq event stamp: 452 hardirqs last enabled at (451): [] __up_console_sem+0x78/0x80 hardirqs last disabled at (452): [] dump_stack_lvl+0x2e/0xb3 softirqs last enabled at (446): [] __irq_exit_rcu+0x11b/0x180 softirqs last disabled at (427): [] __irq_exit_rcu+0x11b/0x180 CPU: 0 PID: 4843 Comm: syz-executor.5 Not tainted 6.0.0-rc1-next-20220819 #1 syz-executor.5[4843] 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: 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 set_selection_user+0x73/0x190 tioclinux+0x35b/0x5b0 vt_ioctl+0x1edd/0x2ca0 tty_ioctl+0x7c4/0x1700 __x64_sys_ioctl+0x19a/0x210 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fa86b9eeb19 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:00007fa868f64188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fa86bb01f60 RCX: 00007fa86b9eeb19 RDX: 0000000020000040 RSI: 000000000000541c RDI: 0000000000000003 RBP: 00007fa868f641d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffe4328f20f R14: 00007fa868f64300 R15: 0000000000022000 syz-executor.5[4843] 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: dump_stack_lvl+0x8b/0xb3 should_fail.cold+0x5/0xa _copy_from_user+0x2a/0x170 set_selection_user+0x73/0x190 tioclinux+0x35b/0x5b0 vt_ioctl+0x1edd/0x2ca0 tty_ioctl+0x7c4/0x1700 __x64_sys_ioctl+0x19a/0x210 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fa86b9eeb19 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:00007fa868f64188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fa86bb01f60 RCX: 00007fa86b9eeb19 RDX: 0000000020000040 RSI: 000000000000541c RDI: 0000000000000003 RBP: 00007fa868f641d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffe4328f20f R14: 00007fa868f64300 R15: 0000000000022000 audit: type=1400 audit(1661079301.381:12): avc: denied { write } for pid=4841 comm="syz-executor.0" name="task" dev="proc" ino=17046 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=dir permissive=1 audit: type=1400 audit(1661079301.389:13): avc: denied { add_name } for pid=4841 comm="syz-executor.0" name="4844" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=dir permissive=1 audit: type=1400 audit(1661079301.396:14): avc: denied { create } for pid=4841 comm="syz-executor.0" name="4844" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:kernel_t:s0 tclass=file permissive=1 capability: warning: `syz-executor.0' uses 32-bit capabilities (legacy support in use) loop6: detected capacity change from 0 to 2048 EXT4-fs (loop6): mounted filesystem without journal. Quota mode: none. ext4 filesystem being mounted at /syzkaller-testdir516365344/syzkaller.7mz9hn/33/file0 supports timestamps until 2038 (0x7fffffff) EXT4-fs (loop6): unmounting filesystem. FAULT_INJECTION: forcing a failure. name fail_usercopy, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 4866 Comm: syz-executor.5 Tainted: G W 6.0.0-rc1-next-20220819 #1 syz-executor.5[4866] 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: dump_stack_lvl+0x8b/0xb3 should_fail.cold+0x5/0xa _copy_to_user+0x2a/0x140 simple_read_from_buffer+0xcc/0x160 proc_fail_nth_read+0x198/0x230 vfs_read+0x253/0x930 ksys_read+0x127/0x250 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fa86b9a169c Code: ec 28 48 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 f9 fc ff ff 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 31 c0 0f 05 <48> 3d 00 f0 ff ff 77 34 44 89 c7 48 89 44 24 08 e8 2f fd ff ff 48 RSP: 002b:00007fa868f64170 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fa86b9a169c RDX: 000000000000000f RSI: 00007fa868f641e0 RDI: 0000000000000004 RBP: 00007fa868f641d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffe4328f20f R14: 00007fa868f64300 R15: 0000000000022000