FAULT_INJECTION: forcing a failure. name fail_usercopy, interval 1, probability 0, space 0, times 1 CPU: 0 PID: 8025 Comm: syz-executor.2 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: 8025, name: syz-executor.2 preempt_count: 0, expected: 0 RCU nest depth: 0, expected: 0 2 locks held by syz-executor.2/8025: #0: ffff888047e49098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x90 #1: ffff888047e49130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: file_tty_write.constprop.0+0x296/0x8f0 irq event stamp: 438 hardirqs last enabled at (437): [] __up_console_sem+0x78/0x80 hardirqs last disabled at (438): [] dump_stack_lvl+0x2e/0xb3 softirqs last enabled at (432): [] __irq_exit_rcu+0x11b/0x180 softirqs last disabled at (423): [] __irq_exit_rcu+0x11b/0x180 CPU: 0 PID: 8025 Comm: syz-executor.2 Not tainted 6.0.0-rc1-next-20220819 #1 syz-executor.2[8025] cmdline: /syz-executor.2 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 copyin+0x19/0x120 _copy_from_iter+0x1d2/0x1210 file_tty_write.constprop.0+0x449/0x8f0 vfs_write+0x9c3/0xd90 ksys_write+0x127/0x250 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f148820db19 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:00007f1485783188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f1488320f60 RCX: 00007f148820db19 RDX: 000000000000000b RSI: 0000000020000100 RDI: 0000000000000003 RBP: 00007f14857831d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffecc6a600f R14: 00007f1485783300 R15: 0000000000022000 syz-executor.2[8025] cmdline: /syz-executor.2 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 copyin+0x19/0x120 _copy_from_iter+0x1d2/0x1210 file_tty_write.constprop.0+0x449/0x8f0 vfs_write+0x9c3/0xd90 ksys_write+0x127/0x250 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f148820db19 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:00007f1485783188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f1488320f60 RCX: 00007f148820db19 RDX: 000000000000000b RSI: 0000000020000100 RDI: 0000000000000003 RBP: 00007f14857831d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffecc6a600f R14: 00007f1485783300 R15: 0000000000022000 loop3: detected capacity change from 0 to 2048 EXT4-fs warning (device loop3): read_mmp_block:106: Error -117 while reading MMP block 0 FAULT_INJECTION: forcing a failure. name fail_usercopy, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 8040 Comm: syz-executor.2 Tainted: G W 6.0.0-rc1-next-20220819 #1 syz-executor.2[8040] cmdline: /syz-executor.2 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: 0033:0x7f14881c069c 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:00007f1485783170 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 000000000000000b RCX: 00007f14881c069c RDX: 000000000000000f RSI: 00007f14857831e0 RDI: 0000000000000004 RBP: 00007f14857831d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffecc6a600f R14: 00007f1485783300 R15: 0000000000022000 EXT4-fs (loop4): mounted filesystem without journal. Quota mode: none. ext4 filesystem being mounted at /syzkaller-testdir189907031/syzkaller.HqEmuT/109/file0 supports timestamps until 2038 (0x7fffffff) EXT4-fs (loop4): unmounting filesystem.