syzkaller login: [ 30.731258] BUG: Bad rss-counter state mm:000000000de631b5 type:MM_FILEPAGES val:33 [ 30.732983] BUG: Bad rss-counter state mm:000000000de631b5 type:MM_ANONPAGES val:22 [ 30.896734] ================================================================== [ 30.897910] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.899233] Read of size 8 at addr ffff88800cc26798 by task sshd/219 [ 30.900213] [ 30.900502] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.901601] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.902869] Call Trace: [ 30.903285] [ 30.903661] dump_stack_lvl+0x91/0xf0 [ 30.904291] print_report+0xcc/0x620 [ 30.904910] ? __virt_addr_valid+0x102/0x340 [ 30.905630] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.906459] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.907266] kasan_report+0xbe/0xf0 [ 30.907879] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.908697] vma_interval_tree_remove+0xc75/0xec0 [ 30.909487] vma_prepare+0xc54/0x11a0 [ 30.910109] __split_vma+0x5af/0x950 [ 30.910734] ? __pfx___split_vma+0x10/0x10 [ 30.911430] ? find_held_lock+0x2c/0x110 [ 30.912114] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.912846] ? lock_is_held_type+0x9f/0x120 [ 30.913547] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.914342] ? mtree_range_walk+0x632/0x900 [ 30.915089] ? mas_walk+0x5c7/0x7c0 [ 30.915713] do_vmi_munmap+0x1f1/0x2b0 [ 30.916361] mmap_region+0x1f9/0x2660 [ 30.916996] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.917658] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.918579] ? __pfx_lock_acquire+0x10/0x10 [ 30.919154] ? __pfx_mmap_region+0x10/0x10 [ 30.919693] ? security_mmap_addr+0x7d/0xa0 [ 30.920231] ? get_unmapped_area+0x1f5/0x3f0 [ 30.920779] do_mmap+0x854/0xf00 [ 30.921224] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.921719] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.922281] ksys_mmap_pgoff+0x3af/0x500 [ 30.922813] do_syscall_64+0x3f/0x90 [ 30.923297] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.923942] RIP: 0033:0x7f6e08424d82 [ 30.924396] 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 [ 30.926511] RSP: 002b:00007ffe31fb7e28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.927415] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6e08424d82 [ 30.928262] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6e0785e000 [ 30.929108] RBP: 00007f6e0785e000 R08: 0000000000000009 R09: 0000000000001000 [ 30.929953] R10: 0000000000000812 R11: 0000000000000206 R12: 00005582fc8dcb20 [ 30.930807] R13: 00007ffe31fb7e40 R14: 00007ffe31fb7e70 R15: 00007ffe31fb81d0 [ 30.931657] [ 30.931949] [ 30.932171] Allocated by task 212: [ 30.932595] kasan_save_stack+0x22/0x50 [ 30.933096] kasan_set_track+0x25/0x30 [ 30.933587] __kasan_slab_alloc+0x59/0x70 [ 30.934116] kmem_cache_alloc+0x16b/0x370 [ 30.934656] vm_area_dup+0x20/0x160 [ 30.935119] __split_vma+0x170/0x950 [ 30.935590] split_vma+0xc6/0x110 [ 30.936027] mprotect_fixup+0x8d2/0xb30 [ 30.936536] do_mprotect_pkey+0x87e/0xd40 [ 30.937052] __x64_sys_mprotect+0x78/0xc0 [ 30.937569] do_syscall_64+0x3f/0x90 [ 30.938045] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.938703] [ 30.938917] Freed by task 212: [ 30.939310] kasan_save_stack+0x22/0x50 [ 30.939815] kasan_set_track+0x25/0x30 [ 30.940309] kasan_save_free_info+0x2b/0x50 [ 30.940851] __kasan_slab_free+0x10a/0x190 [ 30.941380] kmem_cache_free+0x10d/0x4d0 [ 30.941894] rcu_core+0x8c8/0x2860 [ 30.942340] __do_softirq+0x1b7/0x7d4 [ 30.942824] [ 30.943042] Last potentially related work creation: [ 30.943623] kasan_save_stack+0x22/0x50 [ 30.944128] __kasan_record_aux_stack+0x8e/0xa0 [ 30.944701] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.945344] remove_vma+0x139/0x170 [ 30.945795] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.946347] do_vmi_munmap+0x1f1/0x2b0 [ 30.946854] __vm_munmap+0x138/0x3a0 [ 30.947326] __x64_sys_munmap+0x59/0x80 [ 30.947821] do_syscall_64+0x3f/0x90 [ 30.948299] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.948946] [ 30.949166] The buggy address belongs to the object at ffff88800cc26740 [ 30.949166] which belongs to the cache vm_area_struct of size 168 [ 30.950628] The buggy address is located 88 bytes inside of [ 30.950628] freed 168-byte region [ffff88800cc26740, ffff88800cc267e8) [ 30.952026] [ 30.952247] The buggy address belongs to the physical page: [ 30.952901] page:00000000b0843427 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcc26 [ 30.953989] memcg:ffff88800ef94801 [ 30.954418] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.955125] page_type: 0xffffffff() [ 30.955575] raw: 0100000000000200 ffff8880087a0c80 ffffea0000352700 dead000000000005 [ 30.956495] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef94801 [ 30.957396] page dumped because: kasan: bad access detected [ 30.958058] [ 30.958274] Memory state around the buggy address: [ 30.958873] ffff88800cc26680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.959718] ffff88800cc26700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.960571] >ffff88800cc26780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.961431] ^ [ 30.961921] ffff88800cc26800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.962792] ffff88800cc26880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.963636] ================================================================== [ 30.964751] Disabling lock debugging due to kernel taint [ 33.028148] BUG: Bad rss-counter state mm:00000000335bcdd2 type:MM_FILEPAGES val:33 [ 33.029289] BUG: Bad rss-counter state mm:00000000335bcdd2 type:MM_ANONPAGES val:22 [ 33.485155] BUG: Bad rss-counter state mm:00000000dc672413 type:MM_FILEPAGES val:33 [ 33.486128] BUG: Bad rss-counter state mm:00000000dc672413 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2899' (ECDSA) to the list of known hosts. 2023/06/20 16:01:40 fuzzer started 2023/06/20 16:01:40 dialing manager at localhost:36067 2023/06/20 16:01:40 checking machine... 2023/06/20 16:01:40 checking revisions... [ 34.242632] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:01:40 testing simple program... [ 34.281015] cgroup: Unknown subsys name 'net' [ 34.336094] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:01:40 Registers: info registers vcpu 0 RAX=ffffffff8171adff RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff110028ede98 RSI=ffffffff8171adff RDI=ffff88801476f530 RBP=ffff88801476f500 RSP=ffff88801476f460 R8 =0000000000000001 R9 =ffff88801476f4a8 R10=0000000000038001 R11=000000000001ddab R12=ffff88801476f530 R13=0000000000000000 R14=ffff8880146b1b40 R15=0000000000092c40 RIP=ffffffff813ad470 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f33c3a68900 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=00007f33c2e7d500 CR3=000000000c56c000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=f8993e3e8809508d00000000000ae988 XMM05=72472e60759b700a0000000000131ba8 XMM06=806171799158d96700000000001308d8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007ffd23fc1758 CR3=0000000019e7a000 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=2039333a31303a3631203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039333a31303a3631203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000