syzkaller login: [ 30.612095] BUG: Bad rss-counter state mm:00000000a961c4d0 type:MM_FILEPAGES val:33 [ 30.612953] BUG: Bad rss-counter state mm:00000000a961c4d0 type:MM_ANONPAGES val:22 [ 30.740396] ================================================================== [ 30.741105] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.741827] Read of size 8 at addr ffff88800fce2b38 by task sshd/222 [ 30.742417] [ 30.742582] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.743454] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.744215] Call Trace: [ 30.744464] [ 30.744682] dump_stack_lvl+0x91/0xf0 [ 30.745055] print_report+0xcc/0x620 [ 30.745444] ? __virt_addr_valid+0x102/0x340 [ 30.745862] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.746333] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.746808] kasan_report+0xbe/0xf0 [ 30.747168] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.747644] vma_interval_tree_remove+0xc75/0xec0 [ 30.748125] vma_prepare+0xc54/0x11a0 [ 30.748479] __split_vma+0x5af/0x950 [ 30.748821] ? __pfx___split_vma+0x10/0x10 [ 30.749206] ? find_held_lock+0x2c/0x110 [ 30.749576] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.749987] ? lock_is_held_type+0x9f/0x120 [ 30.750380] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.750815] ? mtree_range_walk+0x632/0x900 [ 30.751217] ? mas_walk+0x5c7/0x7c0 [ 30.751561] do_vmi_munmap+0x1f1/0x2b0 [ 30.751920] mmap_region+0x1f9/0x2660 [ 30.752276] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.752644] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.753163] ? __pfx_lock_acquire+0x10/0x10 [ 30.753548] ? __pfx_mmap_region+0x10/0x10 [ 30.753931] ? security_mmap_addr+0x7d/0xa0 [ 30.754314] ? get_unmapped_area+0x1f5/0x3f0 [ 30.754713] do_mmap+0x854/0xf00 [ 30.755030] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.755388] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.755797] ksys_mmap_pgoff+0x3af/0x500 [ 30.756178] do_syscall_64+0x3f/0x90 [ 30.756523] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.756989] RIP: 0033:0x7f950a495d82 [ 30.757316] 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 [ 30.758847] RSP: 002b:00007fff9e0f1408 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.759504] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f950a495d82 [ 30.760137] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f95098cf000 [ 30.760750] RBP: 00007f95098cf000 R08: 0000000000000009 R09: 0000000000001000 [ 30.761372] R10: 0000000000000812 R11: 0000000000000206 R12: 00005612d7426d90 [ 30.761986] R13: 00007fff9e0f1420 R14: 00007fff9e0f1450 R15: 00007fff9e0f17b0 [ 30.762611] [ 30.762821] [ 30.762976] Allocated by task 213: [ 30.763283] kasan_save_stack+0x22/0x50 [ 30.763649] kasan_set_track+0x25/0x30 [ 30.764016] __kasan_slab_alloc+0x59/0x70 [ 30.764395] kmem_cache_alloc+0x16b/0x370 [ 30.764767] vm_area_dup+0x20/0x160 [ 30.765095] __split_vma+0x170/0x950 [ 30.765434] split_vma+0xc6/0x110 [ 30.765758] mprotect_fixup+0x8d2/0xb30 [ 30.766118] do_mprotect_pkey+0x87e/0xd40 [ 30.766499] __x64_sys_mprotect+0x78/0xc0 [ 30.766876] do_syscall_64+0x3f/0x90 [ 30.767219] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.767689] [ 30.767846] Freed by task 213: [ 30.768138] kasan_save_stack+0x22/0x50 [ 30.768501] kasan_set_track+0x25/0x30 [ 30.768860] kasan_save_free_info+0x2b/0x50 [ 30.769246] __kasan_slab_free+0x10a/0x190 [ 30.769631] kmem_cache_free+0x10d/0x4d0 [ 30.770005] rcu_core+0x8c8/0x2860 [ 30.770330] __do_softirq+0x1b7/0x7d4 [ 30.770680] [ 30.770839] Last potentially related work creation: [ 30.771265] kasan_save_stack+0x22/0x50 [ 30.771626] __kasan_record_aux_stack+0x8e/0xa0 [ 30.772048] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.772513] remove_vma+0x139/0x170 [ 30.772841] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.773248] do_vmi_munmap+0x1f1/0x2b0 [ 30.773605] __vm_munmap+0x138/0x3a0 [ 30.773945] __x64_sys_munmap+0x59/0x80 [ 30.774303] do_syscall_64+0x3f/0x90 [ 30.774650] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.775112] [ 30.775268] The buggy address belongs to the object at ffff88800fce2ae0 [ 30.775268] which belongs to the cache vm_area_struct of size 168 [ 30.776355] The buggy address is located 88 bytes inside of [ 30.776355] freed 168-byte region [ffff88800fce2ae0, ffff88800fce2b88) [ 30.777377] [ 30.777534] The buggy address belongs to the physical page: [ 30.778017] page:00000000b01498ef refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfce2 [ 30.778796] memcg:ffff88800c6b2d01 [ 30.779108] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.779614] page_type: 0xffffffff() [ 30.779949] raw: 0100000000000200 ffff8880087a0c80 ffffea00003ee980 dead000000000005 [ 30.780615] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c6b2d01 [ 30.781271] page dumped because: kasan: bad access detected [ 30.781781] [ 30.781937] Memory state around the buggy address: [ 30.782360] ffff88800fce2a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.782977] ffff88800fce2a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.783597] >ffff88800fce2b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.784324] ^ [ 30.784766] ffff88800fce2b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 30.785386] ffff88800fce2c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.786001] ================================================================== [ 30.786666] Disabling lock debugging due to kernel taint [ 32.910371] BUG: Bad rss-counter state mm:000000007b893273 type:MM_FILEPAGES val:33 [ 32.911521] BUG: Bad rss-counter state mm:000000007b893273 type:MM_ANONPAGES val:22 [ 33.304757] BUG: Bad rss-counter state mm:00000000bd361152 type:MM_FILEPAGES val:32 [ 33.305944] BUG: Bad rss-counter state mm:00000000bd361152 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39046' (ECDSA) to the list of known hosts. 2023/06/21 02:11:30 fuzzer started 2023/06/21 02:11:31 dialing manager at localhost:36067 2023/06/21 02:11:31 checking machine... 2023/06/21 02:11:31 checking revisions... [ 34.022578] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:11:31 testing simple program... [ 34.068546] cgroup: Unknown subsys name 'net' [ 34.125142] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:11:30 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88806ce09a98 RCX=0000000000000001 RDX=1ffff1100d9c1353 RSI=ffff888015efff48 RDI=ffff88806ce09a98 RBP=ffff88806ce09b30 RSP=ffff88806ce09a80 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5080 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff888018c83680 R15=ffff88800debe410 RIP=ffffffff81130368 RFL=00000246 [---Z-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 00007f5f5d7e0700 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=00007f08fdc1c1b0 CR3=0000000016da0000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a36313736352074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363137 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8180c705 RBX=ffffffff813ad470 RCX=ffffffff86138e01 RDX=1ffff11002d93e4c RSI=ffffffff8180c705 RDI=ffff888016c9f2d0 RBP=ffff888016c9f2a0 RSP=ffff888016c9f200 R8 =ffffffff86138e90 R9 =ffff888016c9f248 R10=0000000000038001 R11=0000000000020d8f R12=ffff888016c9f2d0 R13=0000000000000000 R14=ffff8880146651c0 R15=0000000000000cc0 RIP=ffffffff84538440 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 00007f53df023900 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=00007ffca5d5d000 CR3=000000000edf6000 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