syzkaller login: [ 68.738988] BUG: Bad rss-counter state mm:0000000032525e82 type:MM_FILEPAGES val:33 [ 68.741056] BUG: Bad rss-counter state mm:0000000032525e82 type:MM_ANONPAGES val:22 [ 68.910091] ================================================================== [ 68.911054] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 68.912057] Read of size 8 at addr ffff888018fa83f8 by task sshd/228 [ 68.912883] [ 68.913176] CPU: 0 PID: 228 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 68.914099] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 68.915168] Call Trace: [ 68.915520] [ 68.915823] dump_stack_lvl+0x91/0xf0 [ 68.916363] print_report+0xcc/0x620 [ 68.916882] ? __virt_addr_valid+0x102/0x340 [ 68.917491] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.918149] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.918805] kasan_report+0xbe/0xf0 [ 68.919329] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.919991] vma_interval_tree_remove+0xc75/0xec0 [ 68.920656] vma_prepare+0xc54/0x11a0 [ 68.921173] __split_vma+0x5af/0x950 [ 68.921679] ? __pfx___split_vma+0x10/0x10 [ 68.922266] ? find_held_lock+0x2c/0x110 [ 68.922826] do_vmi_align_munmap+0x2ba/0x11f0 [ 68.923432] ? lock_is_held_type+0x9f/0x120 [ 68.924022] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 68.924697] ? mtree_range_walk+0x632/0x900 [ 68.925308] ? mas_walk+0x5c7/0x7c0 [ 68.925818] do_vmi_munmap+0x1f1/0x2b0 [ 68.926360] mmap_region+0x1f9/0x2660 [ 68.926885] ? vm_mmap_pgoff+0x15c/0x3a0 [ 68.927433] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 68.928210] ? __pfx_lock_acquire+0x10/0x10 [ 68.928770] ? __pfx_mmap_region+0x10/0x10 [ 68.929323] ? security_mmap_addr+0x7d/0xa0 [ 68.929871] ? get_unmapped_area+0x1f5/0x3f0 [ 68.930444] do_mmap+0x854/0xf00 [ 68.930903] vm_mmap_pgoff+0x1a6/0x3a0 [ 68.931422] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 68.932009] ksys_mmap_pgoff+0x3af/0x500 [ 68.932540] do_syscall_64+0x3f/0x90 [ 68.933052] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.933727] RIP: 0033:0x7fcceb5d1d82 [ 68.934203] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 68.936466] RSP: 002b:00007ffcca3ab568 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 68.937410] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcceb5d1d82 [ 68.938304] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcceaa0b000 [ 68.939196] RBP: 00007fcceaa0b000 R08: 0000000000000009 R09: 0000000000001000 [ 68.940072] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564be384cd90 [ 68.940952] R13: 00007ffcca3ab580 R14: 00007ffcca3ab5b0 R15: 00007ffcca3ab910 [ 68.941852] [ 68.942156] [ 68.942379] Allocated by task 221: [ 68.942826] kasan_save_stack+0x22/0x50 [ 68.943349] kasan_set_track+0x25/0x30 [ 68.943861] __kasan_slab_alloc+0x59/0x70 [ 68.944444] kmem_cache_alloc+0x16b/0x370 [ 68.944983] vm_area_dup+0x20/0x160 [ 68.945459] __split_vma+0x170/0x950 [ 68.945941] split_vma+0xc6/0x110 [ 68.946399] mprotect_fixup+0x8d2/0xb30 [ 68.946918] do_mprotect_pkey+0x87e/0xd40 [ 68.947461] __x64_sys_mprotect+0x78/0xc0 [ 68.948005] do_syscall_64+0x3f/0x90 [ 68.948519] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.949195] [ 68.949420] Freed by task 221: [ 68.949828] kasan_save_stack+0x22/0x50 [ 68.950352] kasan_set_track+0x25/0x30 [ 68.950878] kasan_save_free_info+0x2b/0x50 [ 68.951429] __kasan_slab_free+0x10a/0x190 [ 68.951980] kmem_cache_free+0x10d/0x4d0 [ 68.952526] rcu_core+0x8c8/0x2860 [ 68.952987] __do_softirq+0x1b7/0x7d4 [ 68.953484] [ 68.953717] Last potentially related work creation: [ 68.954324] kasan_save_stack+0x22/0x50 [ 68.954847] __kasan_record_aux_stack+0x8e/0xa0 [ 68.955443] __call_rcu_common.constprop.0+0x6a/0xb90 [ 68.956134] remove_vma+0x139/0x170 [ 68.956612] do_vmi_align_munmap+0xd4a/0x11f0 [ 68.957201] do_vmi_munmap+0x1f1/0x2b0 [ 68.957708] __vm_munmap+0x138/0x3a0 [ 68.958194] __x64_sys_munmap+0x59/0x80 [ 68.958712] do_syscall_64+0x3f/0x90 [ 68.959218] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.959896] [ 68.960130] The buggy address belongs to the object at ffff888018fa83a0 [ 68.960130] which belongs to the cache vm_area_struct of size 168 [ 68.961805] The buggy address is located 88 bytes inside of [ 68.961805] freed 168-byte region [ffff888018fa83a0, ffff888018fa8448) [ 68.963309] [ 68.963540] The buggy address belongs to the physical page: [ 68.964269] page:000000000e99209a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18fa8 [ 68.965538] memcg:ffff888015d10d01 [ 68.965980] flags: 0x100000000000200(slab|node=0|zone=1) [ 68.966659] page_type: 0xffffffff() [ 68.967130] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 68.968088] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015d10d01 [ 68.969052] page dumped because: kasan: bad access detected [ 68.969730] [ 68.969952] Memory state around the buggy address: [ 68.970555] ffff888018fa8280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 68.971453] ffff888018fa8300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 68.972361] >ffff888018fa8380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 68.973260] ^ [ 68.974151] ffff888018fa8400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 68.975030] ffff888018fa8480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 68.975916] ================================================================== [ 68.977028] Disabling lock debugging due to kernel taint [ 70.950791] BUG: Bad rss-counter state mm:00000000b12a61fb type:MM_FILEPAGES val:33 [ 70.951562] BUG: Bad rss-counter state mm:00000000b12a61fb type:MM_ANONPAGES val:22 [ 71.337870] BUG: Bad rss-counter state mm:00000000f5c02160 type:MM_FILEPAGES val:33 [ 71.338572] BUG: Bad rss-counter state mm:00000000f5c02160 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64221' (ECDSA) to the list of known hosts. 2023/06/21 00:44:23 fuzzer started 2023/06/21 00:44:23 dialing manager at localhost:36067 2023/06/21 00:44:23 checking machine... 2023/06/21 00:44:23 checking revisions... [ 72.083796] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:44:23 testing simple program... [ 72.129125] cgroup: Unknown subsys name 'net' [ 72.220513] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:44:23 Registers: info registers vcpu 0 RAX=ffffffff864bbb59 RBX=0000000000000001 RCX=ffffffff864bbb54 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff864bbb58 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b6a61 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff81130abf RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f3cc529c900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007ffcacc11000 CR3=0000000017c3a000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007ffd6b8b2f78 CR3=0000000005482000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=00007f20589ef5100000558ee77f5790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000