syzkaller login: [ 38.720336] BUG: Bad rss-counter state mm:0000000090bb05d9 type:MM_FILEPAGES val:33 [ 38.721337] BUG: Bad rss-counter state mm:0000000090bb05d9 type:MM_ANONPAGES val:22 [ 38.890582] ================================================================== [ 38.891487] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.892438] Read of size 8 at addr ffff88800d85f798 by task sshd/220 [ 38.893212] [ 38.893436] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.894470] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.895460] Call Trace: [ 38.895779] [ 38.896065] dump_stack_lvl+0x91/0xf0 [ 38.896585] print_report+0xcc/0x620 [ 38.897088] ? __virt_addr_valid+0x102/0x340 [ 38.897648] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.898259] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.898882] kasan_report+0xbe/0xf0 [ 38.899356] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.899970] vma_interval_tree_remove+0xc75/0xec0 [ 38.900573] vma_prepare+0xc54/0x11a0 [ 38.901061] __split_vma+0x5af/0x950 [ 38.901537] ? __pfx___split_vma+0x10/0x10 [ 38.902073] ? find_held_lock+0x2c/0x110 [ 38.902609] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.903171] ? lock_is_held_type+0x9f/0x120 [ 38.903706] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.904317] ? mtree_range_walk+0x632/0x900 [ 38.904869] ? mas_walk+0x5c7/0x7c0 [ 38.905342] do_vmi_munmap+0x1f1/0x2b0 [ 38.905848] mmap_region+0x1f9/0x2660 [ 38.906351] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.906882] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.907627] ? __pfx_lock_acquire+0x10/0x10 [ 38.908183] ? __pfx_mmap_region+0x10/0x10 [ 38.908747] ? security_mmap_addr+0x7d/0xa0 [ 38.909311] ? get_unmapped_area+0x1f5/0x3f0 [ 38.909884] do_mmap+0x854/0xf00 [ 38.910327] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.910851] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.911432] ksys_mmap_pgoff+0x3af/0x500 [ 38.911969] do_syscall_64+0x3f/0x90 [ 38.912470] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.913153] RIP: 0033:0x7f6b70321d82 [ 38.913620] 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 [ 38.915759] RSP: 002b:00007ffec9ca0648 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.916668] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6b70321d82 [ 38.917507] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6b6f75b000 [ 38.918355] RBP: 00007f6b6f75b000 R08: 0000000000000009 R09: 0000000000001000 [ 38.919232] R10: 0000000000000812 R11: 0000000000000206 R12: 00005608714bdf70 [ 38.920106] R13: 00007ffec9ca0660 R14: 00007ffec9ca0690 R15: 00007ffec9ca09f0 [ 38.920974] [ 38.921277] [ 38.921490] Allocated by task 213: [ 38.921926] kasan_save_stack+0x22/0x50 [ 38.922433] kasan_set_track+0x25/0x30 [ 38.922938] __kasan_slab_alloc+0x59/0x70 [ 38.923461] kmem_cache_alloc+0x16b/0x370 [ 38.923977] vm_area_dup+0x20/0x160 [ 38.924426] __split_vma+0x170/0x950 [ 38.924891] split_vma+0xc6/0x110 [ 38.925327] mprotect_fixup+0x8d2/0xb30 [ 38.925822] do_mprotect_pkey+0x87e/0xd40 [ 38.926355] __x64_sys_mprotect+0x78/0xc0 [ 38.926890] do_syscall_64+0x3f/0x90 [ 38.927361] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.927996] [ 38.928210] Freed by task 19: [ 38.928597] kasan_save_stack+0x22/0x50 [ 38.929097] kasan_set_track+0x25/0x30 [ 38.929589] kasan_save_free_info+0x2b/0x50 [ 38.930112] __kasan_slab_free+0x10a/0x190 [ 38.930657] kmem_cache_free+0x10d/0x4d0 [ 38.931157] rcu_core+0x8c8/0x2860 [ 38.931601] __do_softirq+0x1b7/0x7d4 [ 38.932073] [ 38.932286] Last potentially related work creation: [ 38.932868] kasan_save_stack+0x22/0x50 [ 38.933370] __kasan_record_aux_stack+0x8e/0xa0 [ 38.933937] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.934581] remove_vma+0x139/0x170 [ 38.935026] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.935637] do_vmi_munmap+0x1f1/0x2b0 [ 38.936130] __vm_munmap+0x138/0x3a0 [ 38.936600] __x64_sys_munmap+0x59/0x80 [ 38.937093] do_syscall_64+0x3f/0x90 [ 38.937565] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.938199] [ 38.938412] The buggy address belongs to the object at ffff88800d85f740 [ 38.938412] which belongs to the cache vm_area_struct of size 168 [ 38.939894] The buggy address is located 88 bytes inside of [ 38.939894] freed 168-byte region [ffff88800d85f740, ffff88800d85f7e8) [ 38.941275] [ 38.941488] The buggy address belongs to the physical page: [ 38.942137] page:00000000f3b16f11 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd85f [ 38.943230] memcg:ffff888015911401 [ 38.943649] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.944297] page_type: 0xffffffff() [ 38.944741] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.945648] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015911401 [ 38.946555] page dumped because: kasan: bad access detected [ 38.947212] [ 38.947426] Memory state around the buggy address: [ 38.948008] ffff88800d85f680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.948855] ffff88800d85f700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 38.949710] >ffff88800d85f780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.950568] ^ [ 38.951057] ffff88800d85f800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.951907] ffff88800d85f880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.952797] ================================================================== [ 38.953770] Disabling lock debugging due to kernel taint [ 41.387460] BUG: Bad rss-counter state mm:00000000640609e9 type:MM_FILEPAGES val:33 [ 41.388155] BUG: Bad rss-counter state mm:00000000640609e9 type:MM_ANONPAGES val:22 [ 41.854225] BUG: Bad rss-counter state mm:00000000620394dd type:MM_FILEPAGES val:33 [ 41.856545] BUG: Bad rss-counter state mm:00000000620394dd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19562' (ECDSA) to the list of known hosts. 2023/06/20 13:37:39 fuzzer started 2023/06/20 13:37:40 dialing manager at localhost:36067 2023/06/20 13:37:40 checking machine... 2023/06/20 13:37:40 checking revisions... [ 42.561575] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:37:40 testing simple program... [ 42.613368] cgroup: Unknown subsys name 'net' [ 42.677477] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:37:39 Registers: info registers vcpu 0 RAX=ffffffff8118d7d9 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff110011b3f36 RSI=ffff888008d9fe98 RDI=ffffffff8118d7d9 RBP=ffff888008d9f9f0 RSP=ffff888008d9f958 R8 =0000000000000001 R9 =ffff888008d9f998 R10=0000000000038001 R11=00000000000b5d59 R12=ffff888008d9fa20 R13=0000000000000000 R14=ffff888008d90000 R15=ffff88800c61d900 RIP=ffffffff810bd06d 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=0000558c40c37768 CR3=000000000db82000 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=0000000000000000 RBX=ffff88800fe66e90 RCX=0000000000000001 RDX=1ffff11001fccdd3 RSI=ffffffff8173b1bf RDI=ffff88800fe66e98 RBP=0000000000000010 RSP=ffff88800fe66da8 R8 =0000000000000001 R9 =ffff88800fe66e08 R10=0000000000038001 R11=000000000001c3d0 R12=ffff88800fe66e90 R13=0000000000000000 R14=ffff88800f283680 R15=0000000000092800 RIP=ffffffff813ad4be 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 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=00007ffb3c008260 CR3=000000000cbf4000 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=2e6f732e6d617062696c2f756e672d78 XMM02=00302e6f732e6d617062696c2f756e67 XMM03=2d78756e696c2d34365f3638782f6269 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000