syzkaller login: [ 32.243280] BUG: Bad rss-counter state mm:000000001a8580b9 type:MM_FILEPAGES val:33 [ 32.244296] BUG: Bad rss-counter state mm:000000001a8580b9 type:MM_ANONPAGES val:22 [ 32.416461] ================================================================== [ 32.417543] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.418815] Read of size 8 at addr ffff8880167a74e0 by task sshd/220 [ 32.419755] [ 32.420011] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.421074] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.422171] Call Trace: [ 32.422490] [ 32.422787] dump_stack_lvl+0x91/0xf0 [ 32.423290] print_report+0xcc/0x620 [ 32.423792] ? __virt_addr_valid+0x102/0x340 [ 32.424355] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.424973] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.425606] kasan_report+0xbe/0xf0 [ 32.426083] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.426719] vma_interval_tree_remove+0xc75/0xec0 [ 32.427322] vma_prepare+0xc54/0x11a0 [ 32.427816] __split_vma+0x5af/0x950 [ 32.428293] ? __pfx___split_vma+0x10/0x10 [ 32.428824] ? mark_lock.part.0+0xef/0x2f50 [ 32.429364] ? __pfx_mark_lock.part.0+0x10/0x10 [ 32.429949] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.430510] ? lock_is_held_type+0x9f/0x120 [ 32.431071] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.431682] ? mtree_range_walk+0x632/0x900 [ 32.432234] ? mas_walk+0x5c7/0x7c0 [ 32.432723] do_vmi_munmap+0x1f1/0x2b0 [ 32.433233] mmap_region+0x1f9/0x2660 [ 32.433724] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.434240] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.434984] ? __pfx_lock_acquire+0x10/0x10 [ 32.435513] ? __pfx_mmap_region+0x10/0x10 [ 32.436044] ? security_mmap_addr+0x7d/0xa0 [ 32.436584] ? get_unmapped_area+0x1f5/0x3f0 [ 32.437141] do_mmap+0x854/0xf00 [ 32.437587] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.438097] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.438658] ksys_mmap_pgoff+0x3af/0x500 [ 32.439177] do_syscall_64+0x3f/0x90 [ 32.439653] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.440316] RIP: 0033:0x7f7d3ced9d82 [ 32.440772] 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 [ 32.442952] RSP: 002b:00007ffe3aac5708 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.443862] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7d3ced9d82 [ 32.444718] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7d3c313000 [ 32.445565] RBP: 00007f7d3c313000 R08: 0000000000000009 R09: 0000000000001000 [ 32.446419] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560ae3162d90 [ 32.447276] R13: 00007ffe3aac5720 R14: 00007ffe3aac5750 R15: 00007ffe3aac5ab0 [ 32.448137] [ 32.448430] [ 32.448652] Allocated by task 213: [ 32.449089] kasan_save_stack+0x22/0x50 [ 32.449591] kasan_set_track+0x25/0x30 [ 32.450087] __kasan_slab_alloc+0x59/0x70 [ 32.450624] kmem_cache_alloc+0x16b/0x370 [ 32.451162] vm_area_dup+0x20/0x160 [ 32.451620] __split_vma+0x170/0x950 [ 32.452092] split_vma+0xc6/0x110 [ 32.452535] mprotect_fixup+0x8d2/0xb30 [ 32.453044] do_mprotect_pkey+0x87e/0xd40 [ 32.453559] __x64_sys_mprotect+0x78/0xc0 [ 32.454097] do_syscall_64+0x3f/0x90 [ 32.454577] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.455224] [ 32.455440] Freed by task 213: [ 32.455834] kasan_save_stack+0x22/0x50 [ 32.456340] kasan_set_track+0x25/0x30 [ 32.456840] kasan_save_free_info+0x2b/0x50 [ 32.457379] __kasan_slab_free+0x10a/0x190 [ 32.457931] kmem_cache_free+0x10d/0x4d0 [ 32.458453] rcu_core+0x8c8/0x2860 [ 32.458960] __do_softirq+0x1b7/0x7d4 [ 32.459443] [ 32.459665] Last potentially related work creation: [ 32.460246] kasan_save_stack+0x22/0x50 [ 32.460756] __kasan_record_aux_stack+0x8e/0xa0 [ 32.461335] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.461982] remove_vma+0x139/0x170 [ 32.462438] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.463016] do_vmi_munmap+0x1f1/0x2b0 [ 32.463517] __vm_munmap+0x138/0x3a0 [ 32.463996] __x64_sys_munmap+0x59/0x80 [ 32.464492] do_syscall_64+0x3f/0x90 [ 32.464979] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.465627] [ 32.465850] The buggy address belongs to the object at ffff8880167a7488 [ 32.465850] which belongs to the cache vm_area_struct of size 168 [ 32.467334] The buggy address is located 88 bytes inside of [ 32.467334] freed 168-byte region [ffff8880167a7488, ffff8880167a7530) [ 32.468735] [ 32.468950] The buggy address belongs to the physical page: [ 32.469614] page:000000007058101f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x167a7 [ 32.470698] memcg:ffff888016909701 [ 32.471148] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.471817] page_type: 0xffffffff() [ 32.472270] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.473191] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016909701 [ 32.474108] page dumped because: kasan: bad access detected [ 32.474778] [ 32.474996] Memory state around the buggy address: [ 32.475585] ffff8880167a7380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.476445] ffff8880167a7400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 32.477306] >ffff8880167a7480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.478160] ^ [ 32.478923] ffff8880167a7500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 32.479778] ffff8880167a7580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.480640] ================================================================== [ 32.481706] Disabling lock debugging due to kernel taint [ 34.363283] BUG: Bad rss-counter state mm:0000000019bfe7fb type:MM_FILEPAGES val:33 [ 34.364738] BUG: Bad rss-counter state mm:0000000019bfe7fb type:MM_ANONPAGES val:22 [ 34.801046] BUG: Bad rss-counter state mm:0000000041d0a42e type:MM_FILEPAGES val:33 [ 34.801942] BUG: Bad rss-counter state mm:0000000041d0a42e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56199' (ECDSA) to the list of known hosts. 2023/06/20 01:39:31 fuzzer started 2023/06/20 01:39:31 dialing manager at localhost:44161 2023/06/20 01:39:31 checking machine... 2023/06/20 01:39:31 checking revisions... [ 35.457028] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:39:31 testing simple program... [ 35.499129] cgroup: Unknown subsys name 'net' [ 35.547697] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:39:30 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff83640763 RDX=dffffc0000000000 RSI=ffffffff83640764 RDI=ffff88806ce09a70 RBP=ffff88806ce09ac8 RSP=ffff88806ce09a00 R8 =0000000000000001 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=000000000008a899 R12=ffff88806ce09ad0 R13=ffff88806ce09ab8 R14=ffff88806ce09ab1 R15=ffff88806ce09a70 RIP=ffffffff8113071f 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 00007f7bb0a83900 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=00005620b4805768 CR3=000000000f276000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007ffda3223dc8 CR3=0000000005482000 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=00007f4bf52035100000558771116790 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