syzkaller login: [ 31.533235] BUG: Bad rss-counter state mm:000000000f39b528 type:MM_FILEPAGES val:33 [ 31.534484] BUG: Bad rss-counter state mm:000000000f39b528 type:MM_ANONPAGES val:22 [ 31.571687] ================================================================== [ 31.572318] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.573000] Read of size 8 at addr ffff88800dabc3f8 by task sshd/221 [ 31.573542] [ 31.573697] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.574398] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.575245] Call Trace: [ 31.575501] [ 31.575726] dump_stack_lvl+0x91/0xf0 [ 31.576110] print_report+0xcc/0x620 [ 31.576496] ? __virt_addr_valid+0x102/0x340 [ 31.576926] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.577408] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.577943] kasan_report+0xbe/0xf0 [ 31.578378] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.578870] vma_interval_tree_remove+0xc75/0xec0 [ 31.579430] vma_prepare+0xc54/0x11a0 [ 31.579868] __split_vma+0x5af/0x950 [ 31.580238] ? __pfx___split_vma+0x10/0x10 [ 31.580707] ? find_held_lock+0x2c/0x110 [ 31.581141] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.581602] ? lock_is_held_type+0x9f/0x120 [ 31.582111] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.582640] ? mtree_range_walk+0x632/0x900 [ 31.583151] ? mas_walk+0x5c7/0x7c0 [ 31.583584] do_vmi_munmap+0x1f1/0x2b0 [ 31.584014] mmap_region+0x1f9/0x2660 [ 31.584432] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.584847] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.585419] ? __pfx_lock_acquire+0x10/0x10 [ 31.585812] ? __pfx_mmap_region+0x10/0x10 [ 31.586217] ? security_mmap_addr+0x7d/0xa0 [ 31.586614] ? get_unmapped_area+0x1f5/0x3f0 [ 31.587048] do_mmap+0x854/0xf00 [ 31.587390] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.587772] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.588211] ksys_mmap_pgoff+0x3af/0x500 [ 31.588645] do_syscall_64+0x3f/0x90 [ 31.589011] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.589518] RIP: 0033:0x7f7d1cf73d82 [ 31.589891] 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 [ 31.591578] RSP: 002b:00007ffd52a09338 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.592276] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7d1cf73d82 [ 31.592957] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7d1c3ad000 [ 31.593615] RBP: 00007f7d1c3ad000 R08: 0000000000000009 R09: 0000000000001000 [ 31.594270] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f871e26ec0 [ 31.594923] R13: 00007ffd52a09350 R14: 00007ffd52a09380 R15: 00007ffd52a096e0 [ 31.595589] [ 31.595813] [ 31.595979] Allocated by task 214: [ 31.596311] kasan_save_stack+0x22/0x50 [ 31.596754] kasan_set_track+0x25/0x30 [ 31.597155] __kasan_slab_alloc+0x59/0x70 [ 31.597565] kmem_cache_alloc+0x16b/0x370 [ 31.597976] vm_area_dup+0x20/0x160 [ 31.598343] __split_vma+0x170/0x950 [ 31.598712] split_vma+0xc6/0x110 [ 31.599067] mprotect_fixup+0x8d2/0xb30 [ 31.599472] do_mprotect_pkey+0x87e/0xd40 [ 31.599895] __x64_sys_mprotect+0x78/0xc0 [ 31.600319] do_syscall_64+0x3f/0x90 [ 31.600692] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.601178] [ 31.601346] Freed by task 214: [ 31.601654] kasan_save_stack+0x22/0x50 [ 31.602074] kasan_set_track+0x25/0x30 [ 31.602490] kasan_save_free_info+0x2b/0x50 [ 31.602935] __kasan_slab_free+0x10a/0x190 [ 31.603358] kmem_cache_free+0x10d/0x4d0 [ 31.603799] rcu_core+0x8c8/0x2860 [ 31.604178] __do_softirq+0x1b7/0x7d4 [ 31.604589] [ 31.604757] Last potentially related work creation: [ 31.605268] kasan_save_stack+0x22/0x50 [ 31.605687] __kasan_record_aux_stack+0x8e/0xa0 [ 31.606142] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.606609] remove_vma+0x139/0x170 [ 31.606989] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.607432] do_vmi_munmap+0x1f1/0x2b0 [ 31.607812] __vm_munmap+0x138/0x3a0 [ 31.608173] __x64_sys_munmap+0x59/0x80 [ 31.608564] do_syscall_64+0x3f/0x90 [ 31.608929] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.609422] [ 31.609587] Second to last potentially related work creation: [ 31.610123] kasan_save_stack+0x22/0x50 [ 31.610544] __kasan_record_aux_stack+0x8e/0xa0 [ 31.611005] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.611502] remove_vma+0x139/0x170 [ 31.611849] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.612302] do_vmi_munmap+0x1f1/0x2b0 [ 31.612761] mmap_region+0x1f9/0x2660 [ 31.613185] do_mmap+0x854/0xf00 [ 31.613577] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.614028] ksys_mmap_pgoff+0x3af/0x500 [ 31.614454] do_syscall_64+0x3f/0x90 [ 31.614887] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.615485] [ 31.615674] The buggy address belongs to the object at ffff88800dabc3a0 [ 31.615674] which belongs to the cache vm_area_struct of size 168 [ 31.616815] The buggy address is located 88 bytes inside of [ 31.616815] freed 168-byte region [ffff88800dabc3a0, ffff88800dabc448) [ 31.617951] [ 31.618137] The buggy address belongs to the physical page: [ 31.618739] page:000000004b73ab6c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdabc [ 31.619717] memcg:ffff88800cf0c001 [ 31.620112] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.620727] page_type: 0xffffffff() [ 31.621135] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.621981] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cf0c001 [ 31.622809] page dumped because: kasan: bad access detected [ 31.623419] [ 31.623613] Memory state around the buggy address: [ 31.624128] ffff88800dabc280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.624892] ffff88800dabc300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.625498] >ffff88800dabc380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.626100] ^ [ 31.626692] ffff88800dabc400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.627291] ffff88800dabc480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.627884] ================================================================== [ 31.628553] Disabling lock debugging due to kernel taint [ 34.345163] BUG: Bad rss-counter state mm:000000006f79d7fd type:MM_FILEPAGES val:33 [ 34.346499] BUG: Bad rss-counter state mm:000000006f79d7fd type:MM_ANONPAGES val:22 [ 34.842488] BUG: Bad rss-counter state mm:0000000034a75865 type:MM_FILEPAGES val:33 [ 34.843735] BUG: Bad rss-counter state mm:0000000034a75865 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57881' (ECDSA) to the list of known hosts. 2023/06/20 12:47:01 fuzzer started 2023/06/20 12:47:02 dialing manager at localhost:36067 2023/06/20 12:47:02 checking machine... 2023/06/20 12:47:02 checking revisions... [ 35.499703] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:47:02 testing simple program... [ 35.530895] cgroup: Unknown subsys name 'net' [ 35.573979] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:47:01 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888008d9f978 RCX=0000000000000001 RDX=1ffff110011b3f3a RSI=ffff888008d9fd38 RDI=ffffffff813782f8 RBP=ffff888008d9f9d0 RSP=ffff888008d9f960 R8 =0000000000000001 R9 =ffff888008d9f9b8 R10=0000000000038001 R11=0000000000020cbd R12=ffff888008d9fa40 R13=0000000000000000 R14=ffff888008d90000 R15=ffff88801a866508 RIP=ffffffff811303b2 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 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=0000562302c3f818 CR3=0000000018576000 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=00000000000000000000000000000000 XMM01=ff0000000000ffff0000000000ff0000 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=1ffff11000d0a6d5 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff888006853680 RSI=ffffffff811fc431 RDI=ffff888006854af8 RBP=ffff888006853680 RSP=ffff88801847fe50 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff888006853ef8 R13=ffff888006853680 R14=1ffff11000d0a7df R15=0000000000000000 RIP=ffffffff814c0860 RFL=00000213 [----A-C] 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 00007f370bd08900 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=00007ffddd3d7e38 CR3=0000000018576000 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=2031303a37343a3231203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a37343a3231203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000