syzkaller login: [ 36.187797] BUG: Bad rss-counter state mm:000000000419665f type:MM_FILEPAGES val:33 [ 36.188813] BUG: Bad rss-counter state mm:000000000419665f type:MM_ANONPAGES val:22 [ 36.355679] ================================================================== [ 36.356677] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.357606] Read of size 8 at addr ffff888019c865c8 by task sshd/219 [ 36.358474] [ 36.358694] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 36.359575] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.360569] Call Trace: [ 36.360887] [ 36.361167] dump_stack_lvl+0x91/0xf0 [ 36.361659] print_report+0xcc/0x620 [ 36.362138] ? __virt_addr_valid+0x102/0x340 [ 36.362684] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.363314] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.363926] kasan_report+0xbe/0xf0 [ 36.364396] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.365020] vma_interval_tree_remove+0xc75/0xec0 [ 36.365620] vma_prepare+0xc54/0x11a0 [ 36.366094] __split_vma+0x5af/0x950 [ 36.366559] ? __pfx___split_vma+0x10/0x10 [ 36.367081] ? find_held_lock+0x2c/0x110 [ 36.367607] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.368179] ? lock_is_held_type+0x9f/0x120 [ 36.368713] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.369316] ? mtree_range_walk+0x632/0x900 [ 36.369861] ? mas_walk+0x5c7/0x7c0 [ 36.370333] do_vmi_munmap+0x1f1/0x2b0 [ 36.370822] mmap_region+0x1f9/0x2660 [ 36.371313] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.371825] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.372531] ? __pfx_lock_acquire+0x10/0x10 [ 36.373064] ? __pfx_mmap_region+0x10/0x10 [ 36.373595] ? security_mmap_addr+0x7d/0xa0 [ 36.374118] ? get_unmapped_area+0x1f5/0x3f0 [ 36.374661] do_mmap+0x854/0xf00 [ 36.375098] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.375602] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.376164] ksys_mmap_pgoff+0x3af/0x500 [ 36.376665] do_syscall_64+0x3f/0x90 [ 36.377141] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.377793] RIP: 0033:0x7fb49052ed82 [ 36.378249] 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 [ 36.380371] RSP: 002b:00007ffe24575618 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.381264] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb49052ed82 [ 36.382108] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb48f968000 [ 36.382946] RBP: 00007fb48f968000 R08: 0000000000000009 R09: 0000000000001000 [ 36.383796] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cc62403d90 [ 36.384647] R13: 00007ffe24575630 R14: 00007ffe24575660 R15: 00007ffe245759c0 [ 36.385490] [ 36.385782] [ 36.385996] Allocated by task 212: [ 36.386420] kasan_save_stack+0x22/0x50 [ 36.386917] kasan_set_track+0x25/0x30 [ 36.387413] __kasan_slab_alloc+0x59/0x70 [ 36.387935] kmem_cache_alloc+0x16b/0x370 [ 36.388453] vm_area_dup+0x20/0x160 [ 36.388902] __split_vma+0x170/0x950 [ 36.389367] split_vma+0xc6/0x110 [ 36.389799] mprotect_fixup+0x8d2/0xb30 [ 36.390295] do_mprotect_pkey+0x87e/0xd40 [ 36.390807] __x64_sys_mprotect+0x78/0xc0 [ 36.391329] do_syscall_64+0x3f/0x90 [ 36.391799] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.392439] [ 36.392651] Freed by task 212: [ 36.393038] kasan_save_stack+0x22/0x50 [ 36.393539] kasan_set_track+0x25/0x30 [ 36.394031] kasan_save_free_info+0x2b/0x50 [ 36.394559] __kasan_slab_free+0x10a/0x190 [ 36.395088] kmem_cache_free+0x10d/0x4d0 [ 36.395616] rcu_core+0x8c8/0x2860 [ 36.396058] __do_softirq+0x1b7/0x7d4 [ 36.396530] [ 36.396743] Last potentially related work creation: [ 36.397327] kasan_save_stack+0x22/0x50 [ 36.397849] __kasan_record_aux_stack+0x8e/0xa0 [ 36.398441] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.399091] remove_vma+0x139/0x170 [ 36.399557] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.400111] do_vmi_munmap+0x1f1/0x2b0 [ 36.400596] __vm_munmap+0x138/0x3a0 [ 36.401070] __x64_sys_munmap+0x59/0x80 [ 36.401597] do_syscall_64+0x3f/0x90 [ 36.402090] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.402735] [ 36.402952] The buggy address belongs to the object at ffff888019c86570 [ 36.402952] which belongs to the cache vm_area_struct of size 168 [ 36.404487] The buggy address is located 88 bytes inside of [ 36.404487] freed 168-byte region [ffff888019c86570, ffff888019c86618) [ 36.405916] [ 36.406138] The buggy address belongs to the physical page: [ 36.406814] page:00000000540bb067 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19c86 [ 36.407960] memcg:ffff888019c85101 [ 36.408392] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.409055] page_type: 0xffffffff() [ 36.409514] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 36.410451] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019c85101 [ 36.411391] page dumped because: kasan: bad access detected [ 36.412072] [ 36.412293] Memory state around the buggy address: [ 36.412887] ffff888019c86480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.413758] ffff888019c86500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 36.414632] >ffff888019c86580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.415488] ^ [ 36.416148] ffff888019c86600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 36.417000] ffff888019c86680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.417849] ================================================================== [ 36.418809] Disabling lock debugging due to kernel taint [ 38.268977] BUG: Bad rss-counter state mm:0000000058cfcded type:MM_FILEPAGES val:33 [ 38.270334] BUG: Bad rss-counter state mm:0000000058cfcded type:MM_ANONPAGES val:22 [ 38.636156] BUG: Bad rss-counter state mm:00000000ee9ff06b type:MM_FILEPAGES val:33 [ 38.637244] BUG: Bad rss-counter state mm:00000000ee9ff06b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56615' (ECDSA) to the list of known hosts. 2023/06/20 20:59:25 fuzzer started 2023/06/20 20:59:25 dialing manager at localhost:36067 2023/06/20 20:59:25 checking machine... 2023/06/20 20:59:25 checking revisions... [ 39.294290] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:59:25 testing simple program... [ 39.327201] cgroup: Unknown subsys name 'net' [ 39.361606] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:59:25 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f7643404020 CR3=000000000d6e4000 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=a8919898e5573caf50431965deca9810 XMM02=000000000011b258ec2efd57dc4c00df XMM03=0000000000121bf87196c02a97ec98b8 XMM04=c110cc5ca1c6a87200000000000ae988 XMM05=e1d2ff62d0c316e800000000001328c0 XMM06=806171799158d96700000000001315f0 XMM07=e042d86d42eb936e0000000000121e78 XMM08=7196c02a97ec98b8000000000011b2b8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff11002cf5f0d RSI=ffffffff8184725c RDI=ffff8880167af828 RBP=ffff8880167af880 RSP=ffff8880167af7b8 R8 =0000000000000001 R9 =ffff8880167af868 R10=0000000000038001 R11=0000000000020c51 R12=ffff8880167af888 R13=ffff8880167af870 R14=ffff8880167af869 R15=ffff8880167af828 RIP=ffffffff811306da RFL=00000212 [----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 00007f5370680900 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=00007ffecdd5a000 CR3=000000000e8bc000 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