loop5: detected capacity change from 0 to 256 FAULT_INJECTION: forcing a failure. name fail_usercopy, interval 1, probability 0, space 0, times 1 CPU: 0 PID: 4845 Comm: syz-executor.1 Not tainted 6.0.0-rc1-next-20220818 #1 BUG: sleeping function called from invalid context at kernel/locking/rwsem.c:1521 in_atomic(): 0, irqs_disabled(): 1, non_block: 0, pid: 4845, name: syz-executor.1 preempt_count: 0, expected: 0 RCU nest depth: 0, expected: 0 1 lock held by syz-executor.1/4845: #0: ffff88800d39a868 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe7/0x100 irq event stamp: 470 hardirqs last enabled at (469): [] __up_console_sem+0x78/0x80 hardirqs last disabled at (470): [] dump_stack_lvl+0x2e/0xb3 softirqs last enabled at (246): [] __irq_exit_rcu+0x11b/0x180 softirqs last disabled at (161): [] __irq_exit_rcu+0x11b/0x180 CPU: 0 PID: 4845 Comm: syz-executor.1 Not tainted 6.0.0-rc1-next-20220818 #1 FAT-fs (loop5): bogus number of reserved sectors FAT-fs (loop5): Can't find a valid FAT filesystem loop2: detected capacity change from 0 to 256 loop7: detected capacity change from 0 to 256 FAT-fs (loop7): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) loop4: detected capacity change from 0 to 256 FAT-fs (loop2): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) syz-executor.1[4845] cmdline: /syz-executor.1 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_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: 0033:0x7ff28b7b369c 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:00007ff288d76170 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 0000000020000000 RCX: 00007ff28b7b369c RDX: 000000000000000f RSI: 00007ff288d761e0 RDI: 0000000000000004 RBP: 00007ff288d761d0 R08: 0000000000000000 R09: 0000000000000000 R10: 000000000401a012 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffc63b0cd0f R14: 00007ff288d76300 R15: 0000000000022000 loop4: detected capacity change from 0 to 256 loop5: detected capacity change from 0 to 256 FAT-fs (loop4): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop5): bogus number of reserved sectors FAT-fs (loop5): Can't find a valid FAT filesystem loop7: detected capacity change from 0 to 256 syz-executor.1[4845] cmdline: /syz-executor.1 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: 0033:0x7ff28b7b369c 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:00007ff288d76170 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 0000000020000000 RCX: 00007ff28b7b369c RDX: 000000000000000f RSI: 00007ff288d761e0 RDI: 0000000000000004 RBP: 00007ff288d761d0 R08: 0000000000000000 R09: 0000000000000000 R10: 000000000401a012 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffc63b0cd0f R14: 00007ff288d76300 R15: 0000000000022000 FAT-fs (loop7): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) loop5: detected capacity change from 0 to 256 FAT-fs (loop5): invalid media value (0x00) FAT-fs (loop5): Can't find a valid FAT filesystem