kasan: GPF could be caused by NULL-ptr deref or user memory access 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+0x172/0x1f0 lib/dump_stack.c:113 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold+0xa/0x1b lib/fault-inject.c:149 general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 4694 Comm: syz-executor.4 Not tainted 5.0.0-rc8+ #88 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__dentry_path+0x49e/0x7c0 fs/d_path.c:344 __should_failslab+0x121/0x190 mm/failslab.c:32 Code: 89 fc 41 83 e4 01 44 89 e6 e8 ee e5 b2 ff 45 84 e4 0f 85 04 02 00 00 e8 a0 e4 b2 ff 48 8b 85 18 ff ff ff 44 89 bd 40 ff ff ff <80> 38 00 0f 85 f9 02 00 00 48 8b 85 38 ff ff ff 41 83 e7 01 44 89 should_failslab+0x9/0x14 mm/slab_common.c:1604 RSP: 0018:ffff888090ca7ad0 EFLAGS: 00010216 slab_pre_alloc_hook mm/slab.h:423 [inline] slab_alloc mm/slab.c:3374 [inline] kmem_cache_alloc+0x2b2/0x6f0 mm/slab.c:3548 RAX: dffffc0000000005 RBX: 0000000000000000 RCX: ffffc90013db5000 RDX: 00000000000096e5 RSI: ffffffff81bcfa80 RDI: 0000000000000001 RBP: ffff888090ca7bc0 R08: ffff88808d82e440 R09: 0000000000000000 kmem_cache_zalloc include/linux/slab.h:730 [inline] __kernfs_new_node+0xef/0x690 fs/kernfs/dir.c:634 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffff888090ca7b98 R14: ffff88804f2d95fe R15: 000000000001c47e FS: 00007fe4b1cef700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffc60e46c1c CR3: 00000000a5943000 CR4: 00000000001426f0 kernfs_new_node+0x99/0x130 fs/kernfs/dir.c:695 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 __kernfs_create_file+0x51/0x340 fs/kernfs/file.c:991 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 sysfs_add_file_mode_ns+0x222/0x560 fs/sysfs/file.c:306 Call Trace: create_files fs/sysfs/group.c:63 [inline] internal_create_group+0x35b/0xc40 fs/sysfs/group.c:148 sysfs_create_group+0x20/0x30 fs/sysfs/group.c:174 dentry_path_raw+0x26/0x30 fs/d_path.c:371 loop_sysfs_init drivers/block/loop.c:839 [inline] loop_set_fd drivers/block/loop.c:969 [inline] lo_ioctl+0xf8f/0x20d0 drivers/block/loop.c:1528 kvm_uevent_notify_change.part.0+0x213/0x440 arch/x86/kvm/../../../virt/kvm/kvm_main.c:4051 kvm_uevent_notify_change arch/x86/kvm/../../../virt/kvm/kvm_main.c:4018 [inline] kvm_dev_ioctl_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:3356 [inline] kvm_dev_ioctl+0x1132/0x1750 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3378 __blkdev_driver_ioctl block/ioctl.c:303 [inline] blkdev_ioctl+0xee8/0x1c40 block/ioctl.c:605 block_ioctl+0xee/0x130 fs/block_dev.c:1914 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:509 [inline] do_vfs_ioctl+0xd6e/0x1390 fs/ioctl.c:696 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:509 [inline] do_vfs_ioctl+0xd6e/0x1390 fs/ioctl.c:696 ksys_ioctl+0xab/0xd0 fs/ioctl.c:713 ksys_ioctl+0xab/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_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+0x103/0x610 arch/x86/entry/common.c:290 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457e29 RIP: 0033:0x457c97 Code: ad b8 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 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 Code: 48 83 c4 08 48 89 d8 5b 5d c3 66 0f 1f 84 00 00 00 00 00 48 89 e8 48 f7 d8 48 39 c3 0f 92 c0 eb 92 66 90 b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 0d ba fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fe4b1ceec78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RSP: 002b:00007ff98c692a88 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457e29 RAX: ffffffffffffffda RBX: 0000000000000010 RCX: 0000000000457c97 RDX: 0000000000000000 RSI: 000000000000ae01 RDI: 0000000000000007 RDX: 0000000000000005 RSI: 0000000000004c00 RDI: 0000000000000006 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 000000000000000a R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe4b1cef6d4 R10: 0000000000000075 R11: 0000000000000246 R12: 0000000000000005 R13: 00000000004c093a R14: 00000000004d2750 R15: 00000000ffffffff R13: 0000000000000000 R14: 00000000004dbc78 R15: 0000000000000004 Modules linked in: kobject: 'loop5' (00000000b4da571a): kobject_uevent_env kobject: 'loop5' (00000000b4da571a): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop0' (00000000284c3f30): kobject_uevent_env kobject: 'loop0' (00000000284c3f30): fill_kobj_path: path = '/devices/virtual/block/loop0' ---[ end trace 943398bcdcde45a4 ]--- RIP: 0010:__dentry_path+0x49e/0x7c0 fs/d_path.c:344 Code: 89 fc 41 83 e4 01 44 89 e6 e8 ee e5 b2 ff 45 84 e4 0f 85 04 02 00 00 e8 a0 e4 b2 ff 48 8b 85 18 ff ff ff 44 89 bd 40 ff ff ff <80> 38 00 0f 85 f9 02 00 00 48 8b 85 38 ff ff ff 41 83 e7 01 44 89 RSP: 0018:ffff888090ca7ad0 EFLAGS: 00010216 RAX: dffffc0000000005 RBX: 0000000000000000 RCX: ffffc90013db5000 RDX: 00000000000096e5 RSI: ffffffff81bcfa80 RDI: 0000000000000001 RBP: ffff888090ca7bc0 R08: ffff88808d82e440 R09: 0000000000000000 kobject: 'loop5' (00000000b4da571a): kobject_uevent_env R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 kobject: 'loop5' (00000000b4da571a): fill_kobj_path: path = '/devices/virtual/block/loop5' R13: ffff888090ca7b98 R14: ffff88804f2d95fe R15: 000000000001c47e FS: 00007fe4b1cef700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000073c000 CR3: 00000000a5943000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 kobject: 'loop0' (00000000284c3f30): kobject_uevent_env DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 kobject: 'loop0' (00000000284c3f30): fill_kobj_path: path = '/devices/virtual/block/loop0'