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 kobject: 'loop0' (0000000084a1e7cb): fill_kobj_path: path = '/devices/virtual/block/loop0' CPU: 0 PID: 12781 Comm: syz-executor5 Not tainted 4.20.0-rc1+ #233 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:find_stack lib/stackdepot.c:188 [inline] RIP: 0010:depot_save_stack+0x121/0x470 lib/stackdepot.c:238 Code: 0f 00 4e 8b 24 f5 e0 79 2c 8b 4d 85 e4 0f 84 d4 00 00 00 44 8d 47 ff 49 c1 e0 03 eb 0d 4d 8b 24 24 4d 85 e4 0f 84 bd 00 00 00 <41> 39 5c 24 08 75 ec 41 3b 7c 24 0c 75 e5 48 8b 01 49 39 44 24 18 kobject: 'loop4' (00000000f4afd7af): kobject_uevent_env RSP: 0018:ffff880180e4ee98 EFLAGS: 00010206 RAX: 00000000acb6c0b1 RBX: 00000000da094a2d RCX: ffff880180e4eef8 RDX: 00000000000bb723 RSI: 00000000006000c0 RDI: 0000000000000015 RBP: ffff880180e4eed0 R08: 00000000000000a0 R09: 00000000b48ed46b R10: 00000000a3b548ef R11: ffff8801dae2db3b R12: 44d6bd181b4d6600 kobject: 'loop4' (00000000f4afd7af): fill_kobj_path: path = '/devices/virtual/block/loop4' R13: ffff880180e4eee0 R14: 0000000000094a2d R15: ffff880194e62b5f FS: 0000000000000000(0000) GS:ffff8801dae00000(0063) knlGS:00000000f5f82b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 000000c42fd05000 CR3: 00000001c27f1000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: save_stack+0xa9/0xd0 mm/kasan/kasan.c:454 kobject: 'loop0' (0000000084a1e7cb): kobject_uevent_env kobject: 'loop0' (0000000084a1e7cb): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop1' (00000000507a2586): kobject_uevent_env kobject: 'loop1' (00000000507a2586): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3' (000000003a7cb588): kobject_uevent_env kobject: 'loop3' (000000003a7cb588): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop2' (00000000e79427b3): kobject_uevent_env kobject: 'loop2' (00000000e79427b3): fill_kobj_path: path = '/devices/virtual/block/loop2' set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xc7/0xe0 mm/kasan/kasan.c:553 kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:490 kobject: 'loop1' (00000000507a2586): kobject_uevent_env slab_post_alloc_hook mm/slab.h:444 [inline] slab_alloc_node mm/slab.c:3335 [inline] kmem_cache_alloc_node_trace+0x135/0x740 mm/slab.c:3661 kmalloc_node include/linux/slab.h:584 [inline] alloc_vmap_area+0x145/0xa50 mm/vmalloc.c:419 kobject: 'loop1' (00000000507a2586): fill_kobj_path: path = '/devices/virtual/block/loop1' __get_vm_area_node+0x181/0x3a0 mm/vmalloc.c:1396 __vmalloc_node_range+0xc4/0x750 mm/vmalloc.c:1745 __vmalloc_node mm/vmalloc.c:1795 [inline] __vmalloc_node_flags mm/vmalloc.c:1809 [inline] vmalloc+0x6f/0x80 mm/vmalloc.c:1831 snd_seq_pool_init+0x8b/0x320 sound/core/seq/seq_memory.c:392 snd_seq_fifo_new+0x102/0x380 sound/core/seq/seq_fifo.c:46 snd_seq_open+0x471/0x590 sound/core/seq/seq_clientmgr.c:333 snd_open+0x21a/0x430 sound/core/sound.c:175 chrdev_open+0x25a/0x710 fs/char_dev.c:417 kobject: 'loop1' (00000000507a2586): kobject_uevent_env kobject: 'loop1' (00000000507a2586): fill_kobj_path: path = '/devices/virtual/block/loop1' do_dentry_open+0x499/0x1250 fs/open.c:771 vfs_open+0xa0/0xd0 fs/open.c:880 do_last fs/namei.c:3418 [inline] path_openat+0x12bc/0x5150 fs/namei.c:3534 kobject: 'loop3' (000000003a7cb588): kobject_uevent_env kobject: 'loop3' (000000003a7cb588): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop2' (00000000e79427b3): kobject_uevent_env kobject: 'loop2' (00000000e79427b3): fill_kobj_path: path = '/devices/virtual/block/loop2' do_filp_open+0x255/0x380 fs/namei.c:3564 kobject: 'loop0' (0000000084a1e7cb): kobject_uevent_env kobject: 'loop0' (0000000084a1e7cb): fill_kobj_path: path = '/devices/virtual/block/loop0' do_sys_open+0x568/0x700 fs/open.c:1063 __do_compat_sys_open fs/open.c:1100 [inline] __se_compat_sys_open fs/open.c:1098 [inline] __ia32_compat_sys_open+0x79/0xb0 fs/open.c:1098 kobject: 'loop4' (00000000f4afd7af): kobject_uevent_env do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline] do_fast_syscall_32+0x34d/0xfb2 arch/x86/entry/common.c:397 kobject: 'loop4' (00000000f4afd7af): fill_kobj_path: path = '/devices/virtual/block/loop4' entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 RIP: 0023:0xf7f86a29 Code: 85 d2 74 02 89 0a 5b 5d c3 8b 04 24 c3 8b 14 24 c3 8b 3c 24 c3 90 90 90 90 90 90 90 90 90 90 90 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 002b:00000000f5f81c14 EFLAGS: 00000296 ORIG_RAX: 0000000000000005 RAX: ffffffffffffffda RBX: 00000000f5f81ccc RCX: 0000000000000002 RDX: 0000000000000000 RSI: 0000000066666667 RDI: 00000000ffffffff RBP: 00000000f5f82168 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace 4af7591bbcc93faa ]--- RIP: 0010:find_stack lib/stackdepot.c:188 [inline] RIP: 0010:depot_save_stack+0x121/0x470 lib/stackdepot.c:238 Code: 0f 00 4e 8b 24 f5 e0 79 2c 8b 4d 85 e4 0f 84 d4 00 00 00 44 8d 47 ff 49 c1 e0 03 eb 0d 4d 8b 24 24 4d 85 e4 0f 84 bd 00 00 00 <41> 39 5c 24 08 75 ec 41 3b 7c 24 0c 75 e5 48 8b 01 49 39 44 24 18 RSP: 0018:ffff880180e4ee98 EFLAGS: 00010206 RAX: 00000000acb6c0b1 RBX: 00000000da094a2d RCX: ffff880180e4eef8 RDX: 00000000000bb723 RSI: 00000000006000c0 RDI: 0000000000000015 RBP: ffff880180e4eed0 R08: 00000000000000a0 R09: 00000000b48ed46b R10: 00000000a3b548ef R11: ffff8801dae2db3b R12: 44d6bd181b4d6600 R13: ffff880180e4eee0 R14: 0000000000094a2d R15: ffff880194e62b5f FS: 0000000000000000(0000) GS:ffff8801dae00000(0063) knlGS:00000000f5f82b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 00000001c27f1000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400