syzkaller login: [ 57.719751] BUG: Bad rss-counter state mm:00000000a3974b9b type:MM_FILEPAGES val:33 [ 57.720943] BUG: Bad rss-counter state mm:00000000a3974b9b type:MM_ANONPAGES val:22 [ 57.868340] ================================================================== [ 57.869458] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 57.870626] Read of size 8 at addr ffff88800f1a2310 by task sshd/220 [ 57.871778] [ 57.872045] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 57.873197] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 57.874462] Call Trace: [ 57.874832] <TASK> [ 57.875138] dump_stack_lvl+0x91/0xf0 [ 57.875655] print_report+0xcc/0x620 [ 57.876165] ? __virt_addr_valid+0x102/0x340 [ 57.876786] ? vma_interval_tree_remove+0xc75/0xec0 [ 57.877441] ? vma_interval_tree_remove+0xc75/0xec0 [ 57.878142] kasan_report+0xbe/0xf0 [ 57.878694] ? vma_interval_tree_remove+0xc75/0xec0 [ 57.879402] vma_interval_tree_remove+0xc75/0xec0 [ 57.880071] vma_prepare+0xc54/0x11a0 [ 57.880587] __split_vma+0x5af/0x950 [ 57.881130] ? __pfx___split_vma+0x10/0x10 [ 57.881732] ? find_held_lock+0x2c/0x110 [ 57.882308] do_vmi_align_munmap+0x2ba/0x11f0 [ 57.883093] ? lock_is_held_type+0x9f/0x120 [ 57.883758] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 57.884430] ? mtree_range_walk+0x632/0x900 [ 57.885054] ? mas_walk+0x5c7/0x7c0 [ 57.885569] do_vmi_munmap+0x1f1/0x2b0 [ 57.886130] mmap_region+0x1f9/0x2660 [ 57.886683] ? vm_mmap_pgoff+0x15c/0x3a0 [ 57.887274] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 57.888076] ? __pfx_lock_acquire+0x10/0x10 [ 57.888680] ? __pfx_mmap_region+0x10/0x10 [ 57.889259] ? security_mmap_addr+0x7d/0xa0 [ 57.889867] ? get_unmapped_area+0x1f5/0x3f0 [ 57.890457] do_mmap+0x854/0xf00 [ 57.890998] vm_mmap_pgoff+0x1a6/0x3a0 [ 57.891532] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 57.892175] ksys_mmap_pgoff+0x3af/0x500 [ 57.892755] do_syscall_64+0x3f/0x90 [ 57.893296] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 57.894020] RIP: 0033:0x7f5487a7ed82 [ 57.894522] 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 [ 57.896972] RSP: 002b:00007fffe7112648 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 57.897991] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5487a7ed82 [ 57.898957] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5486eb8000 [ 57.899900] RBP: 00007f5486eb8000 R08: 0000000000000009 R09: 0000000000001000 [ 57.900836] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558db9b9bd90 [ 57.901802] R13: 00007fffe7112660 R14: 00007fffe7112690 R15: 00007fffe71129f0 [ 57.902743] </TASK> [ 57.903090] [ 57.903327] Allocated by task 213: [ 57.903825] kasan_save_stack+0x22/0x50 [ 57.904373] kasan_set_track+0x25/0x30 [ 57.904930] __kasan_slab_alloc+0x59/0x70 [ 57.905507] kmem_cache_alloc+0x16b/0x370 [ 57.906100] vm_area_dup+0x20/0x160 [ 57.906594] __split_vma+0x170/0x950 [ 57.907171] split_vma+0xc6/0x110 [ 57.907677] mprotect_fixup+0x8d2/0xb30 [ 57.908253] do_mprotect_pkey+0x87e/0xd40 [ 57.908851] __x64_sys_mprotect+0x78/0xc0 [ 57.909406] do_syscall_64+0x3f/0x90 [ 57.909933] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 57.910662] [ 57.910938] Freed by task 213: [ 57.911378] kasan_save_stack+0x22/0x50 [ 57.911950] kasan_set_track+0x25/0x30 [ 57.912607] kasan_save_free_info+0x2b/0x50 [ 57.913202] __kasan_slab_free+0x10a/0x190 [ 57.913808] kmem_cache_free+0x10d/0x4d0 [ 57.914360] rcu_core+0x8c8/0x2860 [ 57.914912] __do_softirq+0x1b7/0x7d4 [ 57.915444] [ 57.915691] Last potentially related work creation: [ 57.916340] kasan_save_stack+0x22/0x50 [ 57.916903] __kasan_record_aux_stack+0x8e/0xa0 [ 57.917542] __call_rcu_common.constprop.0+0x6a/0xb90 [ 57.918271] remove_vma+0x139/0x170 [ 57.918803] do_vmi_align_munmap+0xd4a/0x11f0 [ 57.919431] do_vmi_munmap+0x1f1/0x2b0 [ 57.919980] __vm_munmap+0x138/0x3a0 [ 57.920491] __x64_sys_munmap+0x59/0x80 [ 57.921062] do_syscall_64+0x3f/0x90 [ 57.921582] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 57.922291] [ 57.922527] The buggy address belongs to the object at ffff88800f1a22b8 [ 57.922527] which belongs to the cache vm_area_struct of size 168 [ 57.924215] The buggy address is located 88 bytes inside of [ 57.924215] freed 168-byte region [ffff88800f1a22b8, ffff88800f1a2360) [ 57.925797] [ 57.926039] The buggy address belongs to the physical page: [ 57.926779] page:0000000053181a44 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf1a2 [ 57.928020] memcg:ffff888018165801 [ 57.928491] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 57.929263] page_type: 0xffffffff() [ 57.929763] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 57.930830] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018165801 [ 57.931856] page dumped because: kasan: bad access detected [ 57.932591] [ 57.932838] Memory state around the buggy address: [ 57.933492] ffff88800f1a2200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 57.934469] ffff88800f1a2280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 57.935463] >ffff88800f1a2300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 57.936418] ^ [ 57.936927] ffff88800f1a2380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 57.937884] ffff88800f1a2400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 57.938940] ================================================================== [ 57.939965] Disabling lock debugging due to kernel taint [ 60.089816] BUG: Bad rss-counter state mm:0000000013a88432 type:MM_FILEPAGES val:33 [ 60.091008] BUG: Bad rss-counter state mm:0000000013a88432 type:MM_ANONPAGES val:22 [ 60.482944] BUG: Bad rss-counter state mm:0000000001566523 type:MM_FILEPAGES val:33 [ 60.484160] BUG: Bad rss-counter state mm:0000000001566523 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28565' (ECDSA) to the list of known hosts. 2023/06/20 00:49:54 fuzzer started 2023/06/20 00:49:54 dialing manager at localhost:44161 2023/06/20 00:49:54 checking machine... 2023/06/20 00:49:54 checking revisions... [ 61.184048] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:49:55 testing simple program... [ 61.219861] cgroup: Unknown subsys name 'net' [ 61.283667] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:49:27 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff8880165e3680 RSI=ffffffff81f17f1e RDI=0000000000000005 RBP=ffff88800c203438 RSP=ffff88800fc678d8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=0000000010000000 R14=1ffff11001f8cf1e R15=0000000000000000 RIP=ffffffff814c081b 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 00007f6950054900 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=00007f6950609650 CR3=0000000014704000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=1ffff1100370ca21 RSI=ffffffff81978959 RDI=ffff88801b865108 RBP=ffffea000058dd68 RSP=ffff888014757978 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6c88 R12=ffffea000058dd40 R13=0000000000000000 R14=0000000000001000 R15=0000000000129000 RIP=ffffffff81978977 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f1008067900 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=00007f100757a3a0 CR3=000000000f644000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=e54e1beedacc018700000000000ae988 XMM05=ea0f7ff64ed247f200000000001356e8 XMM06=5feaada6487dd0620000000000134488 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000