syzkaller login: [ 38.870327] BUG: Bad rss-counter state mm:00000000f6956e8d type:MM_FILEPAGES val:33 [ 38.871500] BUG: Bad rss-counter state mm:00000000f6956e8d type:MM_ANONPAGES val:22 [ 38.913836] ================================================================== [ 38.914888] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.916062] Read of size 8 at addr ffff88800d528228 by task sshd/220 [ 38.916965] [ 38.917274] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.918275] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.919375] Call Trace: [ 38.919724] [ 38.920123] dump_stack_lvl+0x91/0xf0 [ 38.920644] print_report+0xcc/0x620 [ 38.921169] ? __virt_addr_valid+0x102/0x340 [ 38.921757] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.922490] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.923181] kasan_report+0xbe/0xf0 [ 38.923767] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.924578] vma_interval_tree_remove+0xc75/0xec0 [ 38.925272] vma_prepare+0xc54/0x11a0 [ 38.925856] __split_vma+0x5af/0x950 [ 38.926489] ? __pfx___split_vma+0x10/0x10 [ 38.927154] ? find_held_lock+0x2c/0x110 [ 38.927793] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.928424] ? lock_is_held_type+0x9f/0x120 [ 38.929019] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.929705] ? mtree_range_walk+0x632/0x900 [ 38.930316] ? mas_walk+0x5c7/0x7c0 [ 38.930832] do_vmi_munmap+0x1f1/0x2b0 [ 38.931381] mmap_region+0x1f9/0x2660 [ 38.931909] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.932473] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.933288] ? __pfx_lock_acquire+0x10/0x10 [ 38.933880] ? __pfx_mmap_region+0x10/0x10 [ 38.934474] ? security_mmap_addr+0x7d/0xa0 [ 38.935058] ? get_unmapped_area+0x1f5/0x3f0 [ 38.935666] do_mmap+0x854/0xf00 [ 38.936146] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.936689] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.937316] ksys_mmap_pgoff+0x3af/0x500 [ 38.937876] do_syscall_64+0x3f/0x90 [ 38.938406] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.939130] RIP: 0033:0x7f221f74cd82 [ 38.939644] 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 [ 38.942017] RSP: 002b:00007ffcd61e9308 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.943024] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f221f74cd82 [ 38.943959] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f221eb86000 [ 38.944901] RBP: 00007f221eb86000 R08: 0000000000000009 R09: 0000000000001000 [ 38.945848] R10: 0000000000000812 R11: 0000000000000206 R12: 000055784c590ec0 [ 38.946781] R13: 00007ffcd61e9320 R14: 00007ffcd61e9350 R15: 00007ffcd61e96b0 [ 38.947730] [ 38.948053] [ 38.948288] Allocated by task 213: [ 38.948766] kasan_save_stack+0x22/0x50 [ 38.949334] kasan_set_track+0x25/0x30 [ 38.949875] __kasan_slab_alloc+0x59/0x70 [ 38.950453] kmem_cache_alloc+0x16b/0x370 [ 38.951023] vm_area_dup+0x20/0x160 [ 38.951528] __split_vma+0x170/0x950 [ 38.952038] split_vma+0xc6/0x110 [ 38.952519] mprotect_fixup+0x8d2/0xb30 [ 38.953067] do_mprotect_pkey+0x87e/0xd40 [ 38.953647] __x64_sys_mprotect+0x78/0xc0 [ 38.954221] do_syscall_64+0x3f/0x90 [ 38.954744] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.955443] [ 38.955678] Freed by task 13: [ 38.956101] kasan_save_stack+0x22/0x50 [ 38.956654] kasan_set_track+0x25/0x30 [ 38.957261] kasan_save_free_info+0x2b/0x50 [ 38.957855] __kasan_slab_free+0x10a/0x190 [ 38.958453] kmem_cache_free+0x10d/0x4d0 [ 38.959009] rcu_core+0x8c8/0x2860 [ 38.959498] __do_softirq+0x1b7/0x7d4 [ 38.960024] [ 38.960261] Last potentially related work creation: [ 38.960912] kasan_save_stack+0x22/0x50 [ 38.961481] __kasan_record_aux_stack+0x8e/0xa0 [ 38.962113] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.962828] remove_vma+0x139/0x170 [ 38.963328] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.963952] do_vmi_munmap+0x1f1/0x2b0 [ 38.964485] __vm_munmap+0x138/0x3a0 [ 38.964995] __x64_sys_munmap+0x59/0x80 [ 38.965553] do_syscall_64+0x3f/0x90 [ 38.966081] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.966785] [ 38.967021] The buggy address belongs to the object at ffff88800d5281d0 [ 38.967021] which belongs to the cache vm_area_struct of size 168 [ 38.968651] The buggy address is located 88 bytes inside of [ 38.968651] freed 168-byte region [ffff88800d5281d0, ffff88800d528278) [ 38.970214] [ 38.970455] The buggy address belongs to the physical page: [ 38.971175] page:000000002ca6c690 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd528 [ 38.972375] memcg:ffff88800c669101 [ 38.972847] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.973574] page_type: 0xffffffff() [ 38.974069] raw: 0100000000000200 ffff8880087a0c80 ffffea000025cfc0 dead000000000008 [ 38.975081] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c669101 [ 38.976072] page dumped because: kasan: bad access detected [ 38.976801] [ 38.977040] Memory state around the buggy address: [ 38.977701] ffff88800d528100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.978640] ffff88800d528180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 38.979572] >ffff88800d528200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.980515] ^ [ 38.981133] ffff88800d528280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.982076] ffff88800d528300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.983010] ================================================================== [ 38.984116] Disabling lock debugging due to kernel taint [ 41.040878] BUG: Bad rss-counter state mm:00000000044b99ac type:MM_FILEPAGES val:33 [ 41.042330] BUG: Bad rss-counter state mm:00000000044b99ac type:MM_ANONPAGES val:22 [ 41.422100] BUG: Bad rss-counter state mm:00000000e8db6921 type:MM_FILEPAGES val:33 [ 41.423219] BUG: Bad rss-counter state mm:00000000e8db6921 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65141' (ECDSA) to the list of known hosts. 2023/06/21 03:38:09 fuzzer started 2023/06/21 03:38:09 dialing manager at localhost:36067 2023/06/21 03:38:09 checking machine... 2023/06/21 03:38:09 checking revisions... [ 42.194693] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:38:09 testing simple program... [ 42.246681] cgroup: Unknown subsys name 'net' [ 42.298870] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:38:09 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800f5a0000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff818348e9 RDI=ffff88800f5a07e8 RBP=1ffff110012a1f2c RSP=ffff88800950f950 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000128 R12=ffff88800f5a07e8 R13=ffffffff818348e9 R14=1ffffd40000df74f R15=0000000000000200 RIP=ffffffff812d8699 RFL=00000012 [----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 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=00007fffcd591f78 CR3=000000000eda8000 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=00007f8a6eefd5100000564be36da790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000000000a0 RBX=00000000000000a0 RCX=0000000000000000 RDX=00000000000101f6 RSI=ffffffff82191d98 RDI=0000000000000007 RBP=ffff88800baf0000 RSP=ffff88800cae77d8 R8 =0000000000000007 R9 =0000000000010000 R10=00000000000101f6 R11=0000000000000128 R12=00000000000101f6 R13=ffffed100175e001 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff82191d9e RFL=00000093 [--S-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 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=00007f99f445b650 CR3=000000000eda8000 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=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