should_failslab+0x5/0x10 mm/slab_common.c:1590 slab_pre_alloc_hook mm/slab.h:424 [inline] slab_alloc mm/slab.c:3383 [inline] kmem_cache_alloc+0x3f/0x370 mm/slab.c:3557 mempool_alloc+0x146/0x350 mm/mempool.c:385 kasan: GPF could be caused by NULL-ptr deref or user memory access bio_alloc_bioset+0x389/0x5e0 block/bio.c:489 general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 23488 Comm: syz-executor.1 Not tainted 4.19.199-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__list_del_entry_valid+0x81/0xf0 lib/list_debug.c:51 Code: 0f 84 c0 f4 84 04 48 b8 00 02 00 00 00 00 ad de 49 39 c4 0f 84 c1 f4 84 04 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 75 51 49 8b 14 24 48 39 ea 0f 85 78 f4 84 04 49 8d 7d bio_alloc include/linux/bio.h:437 [inline] submit_bh_wbc+0x141/0x760 fs/buffer.c:3064 RSP: 0018:ffff8880457d74e8 EFLAGS: 00010246 submit_bh fs/buffer.c:3096 [inline] __bread_slow fs/buffer.c:1176 [inline] __bread_gfp+0x14e/0x300 fs/buffer.c:1369 RAX: dffffc0000000000 RBX: ffff88809aeee000 RCX: ffffffff814bdcab sb_bread include/linux/buffer_head.h:309 [inline] isofs_fill_super+0xa9d/0x27d0 fs/isofs/inode.c:678 RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff88809aeee328 RBP: ffff88809aeee320 R08: 0000000000000001 R09: fffffbfff15ce98c R10: ffffffff8ae74c63 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: ffff88809aeee280 R15: ffff88809aeee328 FS: 00007f624c36d700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000051d3f0 CR3: 000000003fb0b000 CR4: 00000000001406f0 mount_bdev+0x2fc/0x3b0 fs/super.c:1158 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 mount_fs+0xa3/0x310 fs/super.c:1261 Call Trace: vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961 __list_del_entry include/linux/list.h:117 [inline] list_del include/linux/list.h:125 [inline] cbs_destroy+0x81/0x280 net/sched/sch_cbs.c:448 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2469 [inline] do_mount+0x113c/0x2f10 fs/namespace.c:2799 qdisc_create+0xb70/0x1130 net/sched/sch_api.c:1204 tc_modify_qdisc+0x50d/0x1a80 net/sched/sch_api.c:1572 ksys_mount+0xcf/0x130 fs/namespace.c:3015 __do_sys_mount fs/namespace.c:3029 [inline] __se_sys_mount fs/namespace.c:3026 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3026 rtnetlink_rcv_msg+0x453/0xb80 net/core/rtnetlink.c:4782 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x467b0a Code: 48 c7 c2 bc ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 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:00007f0871d24fa8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 netlink_rcv_skb+0x160/0x440 net/netlink/af_netlink.c:2457 RAX: ffffffffffffffda RBX: 00000000200000c0 RCX: 0000000000467b0a RDX: 0000000020000040 RSI: 0000000020000080 RDI: 00007f0871d25000 RBP: 00007f0871d25040 R08: 00007f0871d25040 R09: 0000000020000040 netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline] netlink_unicast+0x4d5/0x690 net/netlink/af_netlink.c:1346 R10: 0000000000000001 R11: 0000000000000202 R12: 0000000020000040 R13: 0000000020000080 R14: 00007f0871d25000 R15: 0000000020000100 netlink_sendmsg+0x6bb/0xc40 net/netlink/af_netlink.c:1911 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xc3/0x120 net/socket.c:661 ___sys_sendmsg+0x7bb/0x8e0 net/socket.c:2225 __sys_sendmsg net/socket.c:2263 [inline] __do_sys_sendmsg net/socket.c:2272 [inline] __se_sys_sendmsg net/socket.c:2270 [inline] __x64_sys_sendmsg+0x132/0x220 net/socket.c:2270 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4665e9 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:00007f624c36d188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9 RDX: 0000000000000000 RSI: 0000000020000200 RDI: 0000000000000007 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffd63fce52f R14: 00007f624c36d300 R15: 0000000000022000 Modules linked in: ---[ end trace cffb5461d4bd60bf ]--- RIP: 0010:__list_del_entry_valid+0x81/0xf0 lib/list_debug.c:51 Code: 0f 84 c0 f4 84 04 48 b8 00 02 00 00 00 00 ad de 49 39 c4 0f 84 c1 f4 84 04 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 75 51 49 8b 14 24 48 39 ea 0f 85 78 f4 84 04 49 8d 7d RSP: 0018:ffff8880457d74e8 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: ffff88809aeee000 RCX: ffffffff814bdcab RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff88809aeee328 RBP: ffff88809aeee320 R08: 0000000000000001 R09: fffffbfff15ce98c R10: ffffffff8ae74c63 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: ffff88809aeee280 R15: ffff88809aeee328 FS: 00007f624c36d700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000051d3f0 CR3: 000000003fb0b000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400