syzkaller login: [ 31.208199] BUG: Bad rss-counter state mm:00000000c615358d type:MM_FILEPAGES val:33 [ 31.209213] BUG: Bad rss-counter state mm:00000000c615358d type:MM_ANONPAGES val:22 [ 31.386504] ================================================================== [ 31.387653] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.388682] Read of size 8 at addr ffff8880145c56b0 by task sshd/219 [ 31.389665] [ 31.389908] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.390879] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.391993] Call Trace: [ 31.392350] [ 31.392665] dump_stack_lvl+0x91/0xf0 [ 31.393206] print_report+0xcc/0x620 [ 31.393745] ? __virt_addr_valid+0x102/0x340 [ 31.394348] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.395034] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.395739] kasan_report+0xbe/0xf0 [ 31.396269] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.396960] vma_interval_tree_remove+0xc75/0xec0 [ 31.397626] vma_prepare+0xc54/0x11a0 [ 31.398161] __split_vma+0x5af/0x950 [ 31.398681] ? __pfx___split_vma+0x10/0x10 [ 31.399276] ? find_held_lock+0x2c/0x110 [ 31.399859] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.400484] ? lock_is_held_type+0x9f/0x120 [ 31.401088] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.401763] ? mtree_range_walk+0x632/0x900 [ 31.402376] ? mas_walk+0x5c7/0x7c0 [ 31.402900] do_vmi_munmap+0x1f1/0x2b0 [ 31.403463] mmap_region+0x1f9/0x2660 [ 31.404002] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.404570] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.405364] ? __pfx_lock_acquire+0x10/0x10 [ 31.405954] ? __pfx_mmap_region+0x10/0x10 [ 31.406544] ? security_mmap_addr+0x7d/0xa0 [ 31.407148] ? get_unmapped_area+0x1f5/0x3f0 [ 31.407755] do_mmap+0x854/0xf00 [ 31.408245] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.408794] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.409419] ksys_mmap_pgoff+0x3af/0x500 [ 31.409982] do_syscall_64+0x3f/0x90 [ 31.410508] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.411236] RIP: 0033:0x7ff13901ed82 [ 31.411742] 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 [ 31.414101] RSP: 002b:00007ffd3f058ab8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.415144] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff13901ed82 [ 31.416122] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff138458000 [ 31.417068] RBP: 00007ff138458000 R08: 0000000000000009 R09: 0000000000001000 [ 31.418009] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560ef4eefec0 [ 31.418957] R13: 00007ffd3f058ad0 R14: 00007ffd3f058b00 R15: 00007ffd3f058e60 [ 31.419917] [ 31.420241] [ 31.420478] Allocated by task 212: [ 31.420960] kasan_save_stack+0x22/0x50 [ 31.421519] kasan_set_track+0x25/0x30 [ 31.422077] __kasan_slab_alloc+0x59/0x70 [ 31.422659] kmem_cache_alloc+0x16b/0x370 [ 31.423232] vm_area_dup+0x20/0x160 [ 31.423749] __split_vma+0x170/0x950 [ 31.424258] split_vma+0xc6/0x110 [ 31.424742] mprotect_fixup+0x8d2/0xb30 [ 31.425300] do_mprotect_pkey+0x87e/0xd40 [ 31.425877] __x64_sys_mprotect+0x78/0xc0 [ 31.426450] do_syscall_64+0x3f/0x90 [ 31.426970] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.427695] [ 31.427937] Freed by task 212: [ 31.428373] kasan_save_stack+0x22/0x50 [ 31.428930] kasan_set_track+0x25/0x30 [ 31.429480] kasan_save_free_info+0x2b/0x50 [ 31.430066] __kasan_slab_free+0x10a/0x190 [ 31.430753] kmem_cache_free+0x10d/0x4d0 [ 31.431332] rcu_core+0x8c8/0x2860 [ 31.431816] __do_softirq+0x1b7/0x7d4 [ 31.432335] [ 31.432567] Last potentially related work creation: [ 31.433202] kasan_save_stack+0x22/0x50 [ 31.433748] __kasan_record_aux_stack+0x8e/0xa0 [ 31.434390] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.435123] remove_vma+0x139/0x170 [ 31.435633] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.436237] do_vmi_munmap+0x1f1/0x2b0 [ 31.436775] __vm_munmap+0x138/0x3a0 [ 31.437288] __x64_sys_munmap+0x59/0x80 [ 31.437840] do_syscall_64+0x3f/0x90 [ 31.438353] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.439040] [ 31.439286] The buggy address belongs to the object at ffff8880145c5658 [ 31.439286] which belongs to the cache vm_area_struct of size 168 [ 31.440864] The buggy address is located 88 bytes inside of [ 31.440864] freed 168-byte region [ffff8880145c5658, ffff8880145c5700) [ 31.442384] [ 31.442615] The buggy address belongs to the physical page: [ 31.443339] page:00000000f7efa903 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x145c5 [ 31.444525] memcg:ffff88800efb9e01 [ 31.444985] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.445677] page_type: 0xffffffff() [ 31.446159] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.447167] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800efb9e01 [ 31.448151] page dumped because: kasan: bad access detected [ 31.448875] [ 31.449110] Memory state around the buggy address: [ 31.449747] ffff8880145c5580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.450705] ffff8880145c5600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.451653] >ffff8880145c5680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.452599] ^ [ 31.453242] ffff8880145c5700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.454182] ffff8880145c5780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.455130] ================================================================== [ 31.456199] Disabling lock debugging due to kernel taint [ 33.343684] BUG: Bad rss-counter state mm:0000000013b754fd type:MM_FILEPAGES val:33 [ 33.344512] BUG: Bad rss-counter state mm:0000000013b754fd type:MM_ANONPAGES val:22 [ 33.825239] BUG: Bad rss-counter state mm:000000008cd13fe3 type:MM_FILEPAGES val:33 [ 33.825793] BUG: Bad rss-counter state mm:000000008cd13fe3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56874' (ECDSA) to the list of known hosts. 2023/06/19 18:15:38 fuzzer started 2023/06/19 18:15:38 dialing manager at localhost:44161 2023/06/19 18:15:38 checking machine... 2023/06/19 18:15:38 checking revisions... [ 34.396781] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:15:38 testing simple program... [ 34.454603] cgroup: Unknown subsys name 'net' [ 34.492642] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:15:38 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff1100d9c134c RSI=ffffffff81130881 RDI=ffff88806ce09a20 RBP=ffff88806ce09a78 RSP=ffff88806ce099b0 R8 =0000000000000001 R9 =ffff88806ce09a60 R10=0000000000038001 R11=000000000000601e R12=ffff88806ce09a80 R13=ffff88806ce09a68 R14=ffff88806ce09a61 R15=ffff88806ce09a20 RIP=ffffffff811306da RFL=00000212 [----A--] 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 00007feb5f496900 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=00007feb5e8cb100 CR3=0000000008da8000 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=84e79948319e37809a4befd102f80aff XMM02=ec2efd57dc4c00df000000000011d348 XMM03=ca66c27b4bcb1bdc000000000011d418 XMM04=54bdbe8e2dc14dd400000000000ae988 XMM05=655de4bb81f3442600000000001352a0 XMM06=dfcdbad4f1609c3700000000001343e8 XMM07=fb795ef6d657705600000000001248f8 XMM08=2c67c8bc2e329bc3000000000011d3b8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf35000 RCX=ffffffff812d869a RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff11002d48f43 RSP=ffff888016a479f8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=ffffffff856cd420 R13=ffffffff81787baa R14=0000000000000cc0 R15=ffffffff8366cd3c RIP=ffffffff8135b905 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 00007f037feeb900 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=00007ffe03b5f000 CR3=000000000e79a000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000