syzkaller login: [ 40.722026] BUG: Bad rss-counter state mm:00000000abb01773 type:MM_FILEPAGES val:33 [ 40.723641] BUG: Bad rss-counter state mm:00000000abb01773 type:MM_ANONPAGES val:22 [ 40.880492] ================================================================== [ 40.881377] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.882276] Read of size 8 at addr ffff8880162194e0 by task sshd/226 [ 40.883025] [ 40.883236] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.884231] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.885169] Call Trace: [ 40.885479] [ 40.885757] dump_stack_lvl+0x91/0xf0 [ 40.886256] print_report+0xcc/0x620 [ 40.886724] ? __virt_addr_valid+0x102/0x340 [ 40.887282] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.887878] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.888468] kasan_report+0xbe/0xf0 [ 40.888928] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.889524] vma_interval_tree_remove+0xc75/0xec0 [ 40.890127] vma_prepare+0xc54/0x11a0 [ 40.890588] __split_vma+0x5af/0x950 [ 40.891059] ? __pfx___split_vma+0x10/0x10 [ 40.891576] ? find_held_lock+0x2c/0x110 [ 40.892080] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.892623] ? lock_is_held_type+0x9f/0x120 [ 40.893144] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.893738] ? mtree_range_walk+0x632/0x900 [ 40.894277] ? mas_walk+0x5c7/0x7c0 [ 40.894741] do_vmi_munmap+0x1f1/0x2b0 [ 40.895240] mmap_region+0x1f9/0x2660 [ 40.895710] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.896207] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.896897] ? __pfx_lock_acquire+0x10/0x10 [ 40.897415] ? __pfx_mmap_region+0x10/0x10 [ 40.897945] ? security_mmap_addr+0x7d/0xa0 [ 40.898461] ? get_unmapped_area+0x1f5/0x3f0 [ 40.899001] do_mmap+0x854/0xf00 [ 40.899434] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.899915] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.900485] ksys_mmap_pgoff+0x3af/0x500 [ 40.900988] do_syscall_64+0x3f/0x90 [ 40.901456] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.902083] RIP: 0033:0x7f9375d46d82 [ 40.902526] 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 [ 40.904991] RSP: 002b:00007ffe00c79818 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.906075] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9375d46d82 [ 40.907016] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9375180000 [ 40.907833] RBP: 00007f9375180000 R08: 0000000000000009 R09: 0000000000001000 [ 40.908635] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c93f405b20 [ 40.909465] R13: 00007ffe00c79830 R14: 00007ffe00c79860 R15: 00007ffe00c79bc0 [ 40.910301] [ 40.910587] [ 40.910817] Allocated by task 219: [ 40.911239] kasan_save_stack+0x22/0x50 [ 40.911738] kasan_set_track+0x25/0x30 [ 40.912223] __kasan_slab_alloc+0x59/0x70 [ 40.912738] kmem_cache_alloc+0x16b/0x370 [ 40.913243] vm_area_dup+0x20/0x160 [ 40.913690] __split_vma+0x170/0x950 [ 40.914143] split_vma+0xc6/0x110 [ 40.914574] mprotect_fixup+0x8d2/0xb30 [ 40.915074] do_mprotect_pkey+0x87e/0xd40 [ 40.915586] __x64_sys_mprotect+0x78/0xc0 [ 40.916096] do_syscall_64+0x3f/0x90 [ 40.916557] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.917188] [ 40.917401] Freed by task 205: [ 40.917789] kasan_save_stack+0x22/0x50 [ 40.918287] kasan_set_track+0x25/0x30 [ 40.918767] kasan_save_free_info+0x2b/0x50 [ 40.919291] __kasan_slab_free+0x10a/0x190 [ 40.919811] kmem_cache_free+0x10d/0x4d0 [ 40.920308] rcu_core+0x8c8/0x2860 [ 40.920735] __do_softirq+0x1b7/0x7d4 [ 40.921195] [ 40.921404] Last potentially related work creation: [ 40.921969] kasan_save_stack+0x22/0x50 [ 40.922459] __kasan_record_aux_stack+0x8e/0xa0 [ 40.923036] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.923657] remove_vma+0x139/0x170 [ 40.924098] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.924639] do_vmi_munmap+0x1f1/0x2b0 [ 40.925114] __vm_munmap+0x138/0x3a0 [ 40.925576] __x64_sys_munmap+0x59/0x80 [ 40.926062] do_syscall_64+0x3f/0x90 [ 40.926523] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.927158] [ 40.927369] Second to last potentially related work creation: [ 40.928029] kasan_save_stack+0x22/0x50 [ 40.928515] __kasan_record_aux_stack+0x8e/0xa0 [ 40.929062] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.929666] remove_vma+0x139/0x170 [ 40.930102] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.930643] do_vmi_munmap+0x1f1/0x2b0 [ 40.931130] __vm_munmap+0x138/0x3a0 [ 40.931585] __x64_sys_munmap+0x59/0x80 [ 40.932072] do_syscall_64+0x3f/0x90 [ 40.932536] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.933153] [ 40.933364] The buggy address belongs to the object at ffff888016219488 [ 40.933364] which belongs to the cache vm_area_struct of size 168 [ 40.934781] The buggy address is located 88 bytes inside of [ 40.934781] freed 168-byte region [ffff888016219488, ffff888016219530) [ 40.936155] [ 40.936370] The buggy address belongs to the physical page: [ 40.937016] page:00000000bfde8af8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16219 [ 40.938082] memcg:ffff888017e83301 [ 40.938499] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 40.939192] page_type: 0xffffffff() [ 40.939631] raw: 0100000000000200 ffff88800879fc80 ffffea00005f6d00 dead000000000005 [ 40.940514] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017e83301 [ 40.941373] page dumped because: kasan: bad access detected [ 40.941997] [ 40.942205] Memory state around the buggy address: [ 40.942756] ffff888016219380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 40.943579] ffff888016219400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 40.944382] >ffff888016219480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.945190] ^ [ 40.945923] ffff888016219500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 40.946751] ffff888016219580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.947580] ================================================================== [ 40.948564] Disabling lock debugging due to kernel taint [ 43.479927] BUG: Bad rss-counter state mm:00000000c140c387 type:MM_FILEPAGES val:33 [ 43.481280] BUG: Bad rss-counter state mm:00000000c140c387 type:MM_ANONPAGES val:22 [ 43.907752] BUG: Bad rss-counter state mm:0000000044a815a3 type:MM_FILEPAGES val:33 [ 43.909268] BUG: Bad rss-counter state mm:0000000044a815a3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14450' (ECDSA) to the list of known hosts. 2023/06/19 15:05:51 fuzzer started 2023/06/19 15:05:51 dialing manager at localhost:44161 2023/06/19 15:05:51 checking machine... 2023/06/19 15:05:51 checking revisions... [ 44.658557] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:05:51 testing simple program... [ 44.712564] cgroup: Unknown subsys name 'net' [ 44.762119] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:05:49 Registers: info registers vcpu 0 RAX=ffffffff8100455c RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff110011aff3a RSI=ffffffff8100455c RDI=ffff888008d7fa40 RBP=ffff888008d7fa10 RSP=ffff888008d7f970 R8 =0000000000000001 R9 =ffff888008d7f9b8 R10=0000000000038001 R11=0000000000009bea R12=ffff888008d7fa40 R13=0000000000000000 R14=ffff888008d70000 R15=ffff88800de73080 RIP=ffffffff813ad420 RFL=00000286 [--S--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 0000000000000000 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=00007fff604c1000 CR3=00000000095bc000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888019982a50 RCX=0000000000000000 RDX=1ffff11003330557 RSI=ffffffff818e3991 RDI=ffff888019982aa8 RBP=ffff888008edfb60 RSP=ffff888008edfb30 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000020 R11=00000000000b6996 R12=000000005fed2781 R13=ffff888008ec1220 R14=0000000064906ece R15=00000000379605aa RIP=ffffffff818e39b8 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 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=00007fa28d25e000 CR3=000000000fcac000 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=756e696c2d34365f3638782f62696c2f XMM01=732e637072697462696c2f756e672d78 XMM02=00332e6f732e637072697462696c2f75 XMM03=6e672d78756e696c2d34365f3638782f XMM04=00000000000000000000000000000000 XMM05=00007fa28d75af6000007fa28d53df30 XMM06=00007fa28d53da2000007fa28d53d510 XMM07=00007fa28d53d00000007fa28d75ba20 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000