RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f357db066d4 R13: 00000000004c3e2a R14: 00000000004d6c68 R15: 0000000000000006 kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 13210 Comm: syz-executor1 Not tainted 4.20.0-rc7+ #155 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:loop_validate_file+0x247/0x470 drivers/block/loop.c:663 Code: 00 00 48 89 f8 48 c1 e8 03 80 3c 18 00 0f 85 2e 02 00 00 4d 8b a4 24 f0 00 00 00 49 8d bc 24 b8 01 00 00 48 89 f8 48 c1 e8 03 <80> 3c 18 00 0f 85 03 02 00 00 4d 8b a4 24 b8 01 00 00 4c 89 e0 48 RSP: 0018:ffff8881b5d8f8f8 EFLAGS: 00010202 RAX: 0000000000000037 RBX: dffffc0000000000 RCX: ffffc90007de9000 RDX: 000000000000007b RSI: ffffffff845cf627 RDI: 00000000000001b8 RBP: ffff8881b5d8f918 R08: ffff8881cca541c0 R09: ffffed103b5e5b5f R10: 0000000000000002 R11: ffff8881daf2dafb R12: 0000000000000000 R13: ffff8881b643c600 R14: 0000000000000002 R15: ffff8881b643c600 FS: 00007f8a29927700(0000) GS:ffff8881daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2b7224d169 CR3: 00000001d8554000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: loop_change_fd drivers/block/loop.c:708 [inline] lo_ioctl+0x9e0/0x1d60 drivers/block/loop.c:1411 __blkdev_driver_ioctl block/ioctl.c:303 [inline] blkdev_ioctl+0x98e/0x21b0 block/ioctl.c:605 block_ioctl+0xee/0x130 fs/block_dev.c:1883 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:509 [inline] do_vfs_ioctl+0x1de/0x1790 fs/ioctl.c:696 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:713 __do_sys_ioctl fs/ioctl.c:720 [inline] __se_sys_ioctl fs/ioctl.c:718 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:718 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457669 Code: fd b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f8a29926c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457669 RDX: 0000000000000004 RSI: 0000000000004c06 RDI: 0000000000000003 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f8a299276d4 R13: 00000000004c0856 R14: 00000000004d1988 R15: 00000000ffffffff Modules linked in: kobject: 'loop3' (00000000ff8a82a2): kobject_uevent_env ---[ end trace 76db962b4d960848 ]--- RIP: 0010:loop_validate_file+0x247/0x470 drivers/block/loop.c:663 kobject: 'loop0' (00000000332f3995): kobject_uevent_env kobject: 'loop3' (00000000ff8a82a2): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop0' (00000000332f3995): fill_kobj_path: path = '/devices/virtual/block/loop0' Code: 00 00 48 89 f8 48 c1 e8 03 80 3c 18 00 0f 85 2e 02 00 00 4d 8b a4 24 f0 00 00 00 49 8d bc 24 b8 01 00 00 48 89 f8 48 c1 e8 03 <80> 3c 18 00 0f 85 03 02 00 00 4d 8b a4 24 b8 01 00 00 4c 89 e0 48 kobject: 'loop5' (000000005903e468): kobject_uevent_env FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 1 PID: 13221 Comm: syz-executor3 Tainted: G D 4.20.0-rc7+ #155 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x244/0x39d lib/dump_stack.c:113 RSP: 0018:ffff8881b5d8f8f8 EFLAGS: 00010202 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0xa/0x17 lib/fault-inject.c:149 RAX: 0000000000000037 RBX: dffffc0000000000 RCX: ffffc90007de9000 RDX: 000000000000007b RSI: ffffffff845cf627 RDI: 00000000000001b8 RBP: ffff8881b5d8f918 R08: ffff8881cca541c0 R09: ffffed103b5e5b5f R10: 0000000000000002 R11: ffff8881daf2dafb R12: 0000000000000000 R13: ffff8881b643c600 R14: 0000000000000002 R15: ffff8881b643c600 __should_failslab+0x124/0x180 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1578 slab_pre_alloc_hook mm/slab.h:423 [inline] slab_alloc_node mm/slab.c:3299 [inline] kmem_cache_alloc_node+0x26e/0x730 mm/slab.c:3642 FS: 00007f8a29927700(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000 __alloc_skb+0x119/0x770 net/core/skbuff.c:193 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000708158 CR3: 00000001d8554000 CR4: 00000000001406f0 alloc_skb include/linux/skbuff.h:997 [inline] alloc_skb_with_frags+0x133/0x7d0 net/core/skbuff.c:5220 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 sock_alloc_send_pskb+0x87a/0xaf0 net/core/sock.c:2083 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600