Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k IPVS: ftp: loaded support on port[0] = 21 hfs: unable to locate alternate MDB hfs: continuing without an alternate MDB general protection fault: 0000 [#1] SMP hfs: unable to locate alternate MDB CPU: 1 PID: 2532 Comm: udevd Not tainted 4.19.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 RIP: 0010:freelist_dereference mm/slub.c:262 [inline] RIP: 0010:get_freepointer mm/slub.c:268 [inline] RIP: 0010:get_freepointer_safe mm/slub.c:282 [inline] RIP: 0010:slab_alloc_node mm/slub.c:2675 [inline] RIP: 0010:slab_alloc mm/slub.c:2714 [inline] RIP: 0010:kmem_cache_alloc_trace+0x8d/0x1e0 mm/slub.c:2731 Code: 65 4c 03 05 0d ae e2 7e 49 83 78 10 00 4d 8b 20 0f 84 13 01 00 00 4d 85 e4 0f 84 0a 01 00 00 49 8b 39 41 8b 41 20 40 f6 c7 0f <49> 8b 1c 04 0f 85 45 01 00 00 48 8d 4a 01 4c 89 e0 65 48 0f c7 0f hfs: continuing without an alternate MDB RSP: 0018:ffffc90000dd7c48 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc90000dd7bf4 RDX: 0000000000008789 RSI: 0000000000000060 RDI: 00000000000252d0 RBP: ffffc90000dd7c78 R08: ffff880237b252d0 R09: ffff880237403500 R10: 0000000000000000 R11: ffff8802354db5b0 R12: 3f3f3f3f3f3f0082 R13: 00000000006000c0 R14: ffff880237403500 R15: 0000000000000060 FS: 00007fdad67b1c80(0000) GS:ffff880237b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd6f3d231e5 CR3: 000000023032f000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kmalloc include/linux/slab.h:513 [inline] kernfs_get_open_node fs/kernfs/file.c:572 [inline] kernfs_fop_open+0x311/0x420 fs/kernfs/file.c:718 do_dentry_open+0x134/0x360 fs/open.c:771 vfs_open+0x28/0x30 fs/open.c:880 do_last fs/namei.c:3418 [inline] path_openat+0x2ba/0xc40 fs/namei.c:3534 do_filp_open+0x8e/0x100 fs/namei.c:3564 do_sys_open+0x17d/0x210 fs/open.c:1063 __do_sys_openat fs/open.c:1090 [inline] __se_sys_openat fs/open.c:1084 [inline] __x64_sys_openat+0x1b/0x20 fs/open.c:1084 do_syscall_64+0x63/0x160 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7fdad68dc9a4 Code: 24 20 48 8d 44 24 30 48 89 44 24 28 64 8b 04 25 18 00 00 00 85 c0 75 2c 44 89 e2 48 89 ee bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 76 60 48 8b 15 55 a4 0d 00 f7 d8 64 89 02 48 83 RSP: 002b:00007ffde6462850 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 0000000000000008 RCX: 00007fdad68dc9a4 RDX: 0000000000080000 RSI: 00007ffde6462988 RDI: 00000000ffffff9c RBP: 00007ffde6462988 R08: 0000000000000008 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000080000 R13: 0000559c843ebb42 R14: 0000000000000001 R15: 0000559c84407160 Modules linked in: ---[ end trace ece74a052820a1af ]--- RIP: 0010:freelist_dereference mm/slub.c:262 [inline] RIP: 0010:get_freepointer mm/slub.c:268 [inline] RIP: 0010:get_freepointer_safe mm/slub.c:282 [inline] RIP: 0010:slab_alloc_node mm/slub.c:2675 [inline] RIP: 0010:slab_alloc mm/slub.c:2714 [inline] RIP: 0010:kmem_cache_alloc_trace+0x8d/0x1e0 mm/slub.c:2731 Code: 65 4c 03 05 0d ae e2 7e 49 83 78 10 00 4d 8b 20 0f 84 13 01 00 00 4d 85 e4 0f 84 0a 01 00 00 49 8b 39 41 8b 41 20 40 f6 c7 0f <49> 8b 1c 04 0f 85 45 01 00 00 48 8d 4a 01 4c 89 e0 65 48 0f c7 0f RSP: 0018:ffffc90000dd7c48 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc90000dd7bf4 RDX: 0000000000008789 RSI: 0000000000000060 RDI: 00000000000252d0 RBP: ffffc90000dd7c78 R08: ffff880237b252d0 R09: ffff880237403500 R10: 0000000000000000 R11: ffff8802354db5b0 R12: 3f3f3f3f3f3f0082 R13: 00000000006000c0 R14: ffff880237403500 R15: 0000000000000060 FS: 00007fdad67b1c80(0000) GS:ffff880237b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd6f3d231e5 CR3: 000000023032f000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 65 4c 03 05 0d ae e2 add %gs:0x7ee2ae0d(%rip),%r8 # 0x7ee2ae15 7: 7e 8: 49 83 78 10 00 cmpq $0x0,0x10(%r8) d: 4d 8b 20 mov (%r8),%r12 10: 0f 84 13 01 00 00 je 0x129 16: 4d 85 e4 test %r12,%r12 19: 0f 84 0a 01 00 00 je 0x129 1f: 49 8b 39 mov (%r9),%rdi 22: 41 8b 41 20 mov 0x20(%r9),%eax 26: 40 f6 c7 0f test $0xf,%dil * 2a: 49 8b 1c 04 mov (%r12,%rax,1),%rbx <-- trapping instruction 2e: 0f 85 45 01 00 00 jne 0x179 34: 48 8d 4a 01 lea 0x1(%rdx),%rcx 38: 4c 89 e0 mov %r12,%rax 3b: 65 48 0f c7 0f cmpxchg16b %gs:(%rdi)