syzkaller login: [ 38.761006] BUG: Bad rss-counter state mm:00000000e37f3790 type:MM_FILEPAGES val:33 [ 38.762391] BUG: Bad rss-counter state mm:00000000e37f3790 type:MM_ANONPAGES val:22 [ 38.919974] ================================================================== [ 38.921090] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.922277] Read of size 8 at addr ffff88800e020058 by task sshd/220 [ 38.923381] [ 38.923636] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.924496] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.925514] Call Trace: [ 38.925876] [ 38.926192] dump_stack_lvl+0x91/0xf0 [ 38.926692] print_report+0xcc/0x620 [ 38.927177] ? __virt_addr_valid+0x102/0x340 [ 38.927735] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.928350] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.928965] kasan_report+0xbe/0xf0 [ 38.929438] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.930100] vma_interval_tree_remove+0xc75/0xec0 [ 38.930730] vma_prepare+0xc54/0x11a0 [ 38.931262] __split_vma+0x5af/0x950 [ 38.931737] ? __pfx___split_vma+0x10/0x10 [ 38.932260] ? find_held_lock+0x2c/0x110 [ 38.932804] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.933383] ? lock_is_held_type+0x9f/0x120 [ 38.933968] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.934569] ? mtree_range_walk+0x632/0x900 [ 38.935195] ? mas_walk+0x5c7/0x7c0 [ 38.935674] do_vmi_munmap+0x1f1/0x2b0 [ 38.936167] mmap_region+0x1f9/0x2660 [ 38.936648] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.937199] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.938034] ? __pfx_lock_acquire+0x10/0x10 [ 38.938567] ? __pfx_mmap_region+0x10/0x10 [ 38.939154] ? security_mmap_addr+0x7d/0xa0 [ 38.939685] ? get_unmapped_area+0x1f5/0x3f0 [ 38.940233] do_mmap+0x854/0xf00 [ 38.940675] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.941206] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.941783] ksys_mmap_pgoff+0x3af/0x500 [ 38.942305] do_syscall_64+0x3f/0x90 [ 38.942806] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.943457] RIP: 0033:0x7f7d2d257d82 [ 38.943916] 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 [ 38.946137] RSP: 002b:00007ffcabb0fbe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.947050] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7d2d257d82 [ 38.947905] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7d2c691000 [ 38.948771] RBP: 00007f7d2c691000 R08: 0000000000000009 R09: 0000000000001000 [ 38.949650] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e4afbacf70 [ 38.950538] R13: 00007ffcabb0fc00 R14: 00007ffcabb0fc30 R15: 00007ffcabb0ff90 [ 38.951413] [ 38.951708] [ 38.951923] Allocated by task 213: [ 38.952354] kasan_save_stack+0x22/0x50 [ 38.952895] kasan_set_track+0x25/0x30 [ 38.953393] __kasan_slab_alloc+0x59/0x70 [ 38.953951] kmem_cache_alloc+0x16b/0x370 [ 38.954464] vm_area_dup+0x20/0x160 [ 38.954929] __split_vma+0x170/0x950 [ 38.955396] split_vma+0xc6/0x110 [ 38.955843] mprotect_fixup+0x8d2/0xb30 [ 38.956352] do_mprotect_pkey+0x87e/0xd40 [ 38.956872] __x64_sys_mprotect+0x78/0xc0 [ 38.957392] do_syscall_64+0x3f/0x90 [ 38.957874] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.958518] [ 38.958740] Freed by task 213: [ 38.959139] kasan_save_stack+0x22/0x50 [ 38.959641] kasan_set_track+0x25/0x30 [ 38.960139] kasan_save_free_info+0x2b/0x50 [ 38.960675] __kasan_slab_free+0x10a/0x190 [ 38.961214] kmem_cache_free+0x10d/0x4d0 [ 38.961722] rcu_core+0x8c8/0x2860 [ 38.962168] __do_softirq+0x1b7/0x7d4 [ 38.962670] [ 38.962913] Last potentially related work creation: [ 38.963500] kasan_save_stack+0x22/0x50 [ 38.964099] __kasan_record_aux_stack+0x8e/0xa0 [ 38.964675] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.965319] remove_vma+0x139/0x170 [ 38.965782] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.966356] do_vmi_munmap+0x1f1/0x2b0 [ 38.966881] __vm_munmap+0x138/0x3a0 [ 38.967355] __x64_sys_munmap+0x59/0x80 [ 38.967859] do_syscall_64+0x3f/0x90 [ 38.968336] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.968980] [ 38.969198] The buggy address belongs to the object at ffff88800e020000 [ 38.969198] which belongs to the cache vm_area_struct of size 168 [ 38.970745] The buggy address is located 88 bytes inside of [ 38.970745] freed 168-byte region [ffff88800e020000, ffff88800e0200a8) [ 38.972179] [ 38.972398] The buggy address belongs to the physical page: [ 38.973101] page:00000000a747d7d0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe020 [ 38.974214] memcg:ffff88800df8c901 [ 38.974652] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.975360] page_type: 0xffffffff() [ 38.975819] raw: 0100000000000200 ffff8880087a0c80 ffffea0000318f40 dead000000000007 [ 38.976741] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df8c901 [ 38.977644] page dumped because: kasan: bad access detected [ 38.978347] [ 38.978565] Memory state around the buggy address: [ 38.979188] ffff88800e01ff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.980050] ffff88800e01ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.980909] >ffff88800e020000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.981766] ^ [ 38.982520] ffff88800e020080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 38.983418] ffff88800e020100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.984267] ================================================================== [ 38.985204] Disabling lock debugging due to kernel taint [ 40.925255] BUG: Bad rss-counter state mm:000000005f3cf6ad type:MM_FILEPAGES val:33 [ 40.926242] BUG: Bad rss-counter state mm:000000005f3cf6ad type:MM_ANONPAGES val:22 [ 41.401940] BUG: Bad rss-counter state mm:00000000d45d4c7e type:MM_FILEPAGES val:33 [ 41.403126] BUG: Bad rss-counter state mm:00000000d45d4c7e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53469' (ECDSA) to the list of known hosts. 2023/06/20 19:34:17 fuzzer started 2023/06/20 19:34:18 dialing manager at localhost:36067 2023/06/20 19:34:18 checking machine... 2023/06/20 19:34:18 checking revisions... [ 42.121726] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:34:18 testing simple program... [ 42.171344] cgroup: Unknown subsys name 'net' [ 42.214044] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:34:17 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888015a2d1c0 RSI=ffffffff818c23e8 RDI=0000000000000006 RBP=00007fdbc0000b88 RSP=ffff88800ef3f958 R8 =0000000000000006 R9 =00007fdbc0000b80 R10=00007fdbc0000b88 R11=0000000000000000 R12=0000000000000001 R13=ffff88800ca47900 R14=0000000000000041 R15=00007fdbc0000b80 RIP=ffffffff818c23e8 RFL=00000293 [--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 00007fdbcbf76700 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=00007ff683a912e0 CR3=000000000ddbc000 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=a5d0806f1ea98f9d654d6770b6463320 XMM02=ec2efd57dc4c00df000000000011be78 XMM03=717282478e288332000000000011bf48 XMM04=efb596e1a7cbecc900000000000ae988 XMM05=19e9129bd510f2350000000000131ca8 XMM06=4ad5670bcd93aa9b0000000000130e80 XMM07=e042d86d42eb936e00000000001223c8 XMM08=717282478e288332000000000011bf48 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff85d3d350 RBX=0000000000000001 RCX=ffffffff815343f6 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff81828543 RSP=ffff888008e37c30 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000128 R12=0000000000000200 R13=ffffffff87b6a200 R14=0000000000000001 R15=ffff8880180b2000 RIP=ffffffff8180f036 RFL=00000002 [-------] 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=00007ffc446be000 CR3=000000000d5c2000 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=00000000000000000000000000000000 XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000