syzkaller login: [ 38.700839] BUG: Bad rss-counter state mm:0000000080a530e1 type:MM_FILEPAGES val:33 [ 38.702254] BUG: Bad rss-counter state mm:0000000080a530e1 type:MM_ANONPAGES val:22 [ 38.850923] ================================================================== [ 38.851825] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.852772] Read of size 8 at addr ffff88800e1f0ed8 by task sshd/219 [ 38.853543] [ 38.853761] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.854711] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.855694] Call Trace: [ 38.856020] [ 38.856353] dump_stack_lvl+0x91/0xf0 [ 38.856863] print_report+0xcc/0x620 [ 38.857350] ? __virt_addr_valid+0x102/0x340 [ 38.857908] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.858522] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.859138] kasan_report+0xbe/0xf0 [ 38.859612] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.860239] vma_interval_tree_remove+0xc75/0xec0 [ 38.860868] vma_prepare+0xc54/0x11a0 [ 38.861344] __split_vma+0x5af/0x950 [ 38.861819] ? __pfx___split_vma+0x10/0x10 [ 38.862341] ? find_held_lock+0x2c/0x110 [ 38.862870] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.863427] ? lock_is_held_type+0x9f/0x120 [ 38.863965] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.864576] ? mtree_range_walk+0x632/0x900 [ 38.865124] ? mas_walk+0x5c7/0x7c0 [ 38.865592] do_vmi_munmap+0x1f1/0x2b0 [ 38.866076] mmap_region+0x1f9/0x2660 [ 38.866559] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.867064] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.867772] ? __pfx_lock_acquire+0x10/0x10 [ 38.868304] ? __pfx_mmap_region+0x10/0x10 [ 38.868852] ? security_mmap_addr+0x7d/0xa0 [ 38.869376] ? get_unmapped_area+0x1f5/0x3f0 [ 38.869919] do_mmap+0x854/0xf00 [ 38.870356] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.870849] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.871412] ksys_mmap_pgoff+0x3af/0x500 [ 38.871915] do_syscall_64+0x3f/0x90 [ 38.872391] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.873043] RIP: 0033:0x7f77958ded82 [ 38.873496] 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 [ 38.875611] RSP: 002b:00007ffe00c064d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.876511] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f77958ded82 [ 38.877356] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7794d18000 [ 38.878199] RBP: 00007f7794d18000 R08: 0000000000000009 R09: 0000000000001000 [ 38.879038] R10: 0000000000000812 R11: 0000000000000206 R12: 00005641d639a980 [ 38.879877] R13: 00007ffe00c064f0 R14: 00007ffe00c06520 R15: 00007ffe00c06880 [ 38.880758] [ 38.881048] [ 38.881261] Allocated by task 212: [ 38.881688] kasan_save_stack+0x22/0x50 [ 38.882188] kasan_set_track+0x25/0x30 [ 38.882676] __kasan_slab_alloc+0x59/0x70 [ 38.883199] kmem_cache_alloc+0x16b/0x370 [ 38.883708] vm_area_dup+0x20/0x160 [ 38.884161] __split_vma+0x170/0x950 [ 38.884633] split_vma+0xc6/0x110 [ 38.885067] mprotect_fixup+0x8d2/0xb30 [ 38.885571] do_mprotect_pkey+0x87e/0xd40 [ 38.886086] __x64_sys_mprotect+0x78/0xc0 [ 38.886603] do_syscall_64+0x3f/0x90 [ 38.887079] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.887720] [ 38.887934] Freed by task 212: [ 38.888325] kasan_save_stack+0x22/0x50 [ 38.888851] kasan_set_track+0x25/0x30 [ 38.889338] kasan_save_free_info+0x2b/0x50 [ 38.889867] __kasan_slab_free+0x10a/0x190 [ 38.890399] kmem_cache_free+0x10d/0x4d0 [ 38.890899] rcu_core+0x8c8/0x2860 [ 38.891337] __do_softirq+0x1b7/0x7d4 [ 38.891811] [ 38.892023] Last potentially related work creation: [ 38.892605] kasan_save_stack+0x22/0x50 [ 38.893104] __kasan_record_aux_stack+0x8e/0xa0 [ 38.893677] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.894312] remove_vma+0x139/0x170 [ 38.894765] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.895318] do_vmi_munmap+0x1f1/0x2b0 [ 38.895798] __vm_munmap+0x138/0x3a0 [ 38.896268] __x64_sys_munmap+0x59/0x80 [ 38.896773] do_syscall_64+0x3f/0x90 [ 38.897246] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.897881] [ 38.898095] The buggy address belongs to the object at ffff88800e1f0e80 [ 38.898095] which belongs to the cache vm_area_struct of size 168 [ 38.899556] The buggy address is located 88 bytes inside of [ 38.899556] freed 168-byte region [ffff88800e1f0e80, ffff88800e1f0f28) [ 38.900957] [ 38.901178] The buggy address belongs to the physical page: [ 38.901828] page:000000008b33fb23 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe1f0 [ 38.902920] memcg:ffff88800f7bbf01 [ 38.903342] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.903976] page_type: 0xffffffff() [ 38.904424] raw: 0100000000000200 ffff8880087a0c80 ffffea00005ad340 dead000000000008 [ 38.905355] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f7bbf01 [ 38.906256] page dumped because: kasan: bad access detected [ 38.906911] [ 38.907126] Memory state around the buggy address: [ 38.907700] ffff88800e1f0d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.908554] ffff88800e1f0e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 38.909392] >ffff88800e1f0e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.910228] ^ [ 38.910941] ffff88800e1f0f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 38.911797] ffff88800e1f0f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.912648] ================================================================== [ 38.913706] Disabling lock debugging due to kernel taint [ 41.822074] BUG: Bad rss-counter state mm:0000000098f65fd5 type:MM_FILEPAGES val:33 [ 41.823247] BUG: Bad rss-counter state mm:0000000098f65fd5 type:MM_ANONPAGES val:22 [ 42.230417] BUG: Bad rss-counter state mm:00000000e7847374 type:MM_FILEPAGES val:33 [ 42.231346] BUG: Bad rss-counter state mm:00000000e7847374 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35947' (ECDSA) to the list of known hosts. 2023/06/20 14:59:49 fuzzer started 2023/06/20 14:59:49 dialing manager at localhost:36067 2023/06/20 14:59:49 checking machine... 2023/06/20 14:59:49 checking revisions... [ 42.959679] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:59:49 testing simple program... [ 42.999950] cgroup: Unknown subsys name 'net' [ 43.065851] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:59:49 Registers: info registers vcpu 0 RAX=0000000080000001 RBX=0000000000000000 RCX=ffffffff81711053 RDX=ffff8880168c9b40 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff8880195b7d90 RSP=ffff8880195b7bf8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=ffffea00006a5440 R13=ffff888009864bc8 R14=ffff8880195b7db8 R15=ffffea00006a5474 RIP=ffffffff814c086b RFL=00000202 [-------] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f27c610a900 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=00007f27c66c20b0 CR3=000000001a2b8000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888019285f90 RBX=ffff88800cccfc58 RCX=0000000000000000 RDX=0000000000000000 RSI=ffff888015903351 RDI=ffff888019285fb0 RBP=ffff888014736000 RSP=ffff88800cccf6c0 R8 =3035653138366537 R9 =3465643434383637 R10=3036386166633561 R11=3830306234386136 R12=ffff8880192f0bc0 R13=ffff88800cccfc5c R14=0000000000000020 R15=ffff888019285f90 RIP=ffffffff84513183 RFL=00000297 [--S-APC] 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 00007f179d51e900 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=00007f179ca3c000 CR3=000000000d590000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=f76e4f1690ba786100000000000ae988 XMM05=5e110e09aacd40e60000000000132d60 XMM06=19e9129bd510f2350000000000131bf8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000