syzkaller login: [ 31.305706] BUG: Bad rss-counter state mm:000000006f1afcbc type:MM_FILEPAGES val:33 [ 31.307079] BUG: Bad rss-counter state mm:000000006f1afcbc type:MM_ANONPAGES val:22 [ 31.345801] ================================================================== [ 31.346782] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.347740] Read of size 8 at addr ffff88800d8ddc20 by task sshd/219 [ 31.348494] [ 31.348706] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.349557] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.350517] Call Trace: [ 31.350832] [ 31.351112] dump_stack_lvl+0x91/0xf0 [ 31.351605] print_report+0xcc/0x620 [ 31.352093] ? __virt_addr_valid+0x102/0x340 [ 31.352639] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.353251] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.353859] kasan_report+0xbe/0xf0 [ 31.354326] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.354937] vma_interval_tree_remove+0xc75/0xec0 [ 31.355553] vma_prepare+0xc54/0x11a0 [ 31.356026] __split_vma+0x5af/0x950 [ 31.356492] ? __pfx___split_vma+0x10/0x10 [ 31.357015] ? find_held_lock+0x2c/0x110 [ 31.357525] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.358089] ? lock_is_held_type+0x9f/0x120 [ 31.358628] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.359225] ? mtree_range_walk+0x632/0x900 [ 31.359798] ? mas_walk+0x5c7/0x7c0 [ 31.360265] do_vmi_munmap+0x1f1/0x2b0 [ 31.360749] mmap_region+0x1f9/0x2660 [ 31.361221] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.361728] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.362433] ? __pfx_lock_acquire+0x10/0x10 [ 31.362960] ? __pfx_mmap_region+0x10/0x10 [ 31.363495] ? security_mmap_addr+0x7d/0xa0 [ 31.364023] ? get_unmapped_area+0x1f5/0x3f0 [ 31.364566] do_mmap+0x854/0xf00 [ 31.365004] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.365495] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.366051] ksys_mmap_pgoff+0x3af/0x500 [ 31.366554] do_syscall_64+0x3f/0x90 [ 31.367025] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.367679] RIP: 0033:0x7f22d1c5cd82 [ 31.368126] 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 [ 31.370212] RSP: 002b:00007fffa92298f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.371104] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f22d1c5cd82 [ 31.371954] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f22d1096000 [ 31.372785] RBP: 00007f22d1096000 R08: 0000000000000009 R09: 0000000000001000 [ 31.373761] R10: 0000000000000812 R11: 0000000000000206 R12: 00005591d0226ec0 [ 31.374650] R13: 00007fffa9229910 R14: 00007fffa9229940 R15: 00007fffa9229ca0 [ 31.375510] [ 31.375799] [ 31.376027] Allocated by task 212: [ 31.376451] kasan_save_stack+0x22/0x50 [ 31.376949] kasan_set_track+0x25/0x30 [ 31.377442] __kasan_slab_alloc+0x59/0x70 [ 31.377958] kmem_cache_alloc+0x16b/0x370 [ 31.378468] vm_area_dup+0x20/0x160 [ 31.378926] __split_vma+0x170/0x950 [ 31.379381] split_vma+0xc6/0x110 [ 31.379826] mprotect_fixup+0x8d2/0xb30 [ 31.380326] do_mprotect_pkey+0x87e/0xd40 [ 31.380840] __x64_sys_mprotect+0x78/0xc0 [ 31.381350] do_syscall_64+0x3f/0x90 [ 31.381820] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.382458] [ 31.382680] Freed by task 212: [ 31.383065] kasan_save_stack+0x22/0x50 [ 31.383587] kasan_set_track+0x25/0x30 [ 31.384076] kasan_save_free_info+0x2b/0x50 [ 31.384602] __kasan_slab_free+0x10a/0x190 [ 31.385125] kmem_cache_free+0x10d/0x4d0 [ 31.385655] rcu_core+0x8c8/0x2860 [ 31.386123] __do_softirq+0x1b7/0x7d4 [ 31.386602] [ 31.386833] Last potentially related work creation: [ 31.387462] kasan_save_stack+0x22/0x50 [ 31.387958] __kasan_record_aux_stack+0x8e/0xa0 [ 31.388526] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.389163] remove_vma+0x139/0x170 [ 31.389606] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.390151] do_vmi_munmap+0x1f1/0x2b0 [ 31.390626] __vm_munmap+0x138/0x3a0 [ 31.391089] __x64_sys_munmap+0x59/0x80 [ 31.391584] do_syscall_64+0x3f/0x90 [ 31.392051] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.392691] [ 31.392903] The buggy address belongs to the object at ffff88800d8ddbc8 [ 31.392903] which belongs to the cache vm_area_struct of size 168 [ 31.394345] The buggy address is located 88 bytes inside of [ 31.394345] freed 168-byte region [ffff88800d8ddbc8, ffff88800d8ddc70) [ 31.395741] [ 31.395952] The buggy address belongs to the physical page: [ 31.396598] page:00000000b6fc55d3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd8dd [ 31.397660] memcg:ffff88800d550401 [ 31.398078] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.398712] page_type: 0xffffffff() [ 31.399154] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.400067] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d550401 [ 31.400971] page dumped because: kasan: bad access detected [ 31.401626] [ 31.401839] Memory state around the buggy address: [ 31.402406] ffff88800d8ddb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.403249] ffff88800d8ddb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.404102] >ffff88800d8ddc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.404954] ^ [ 31.405478] ffff88800d8ddc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.406326] ffff88800d8ddd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.407170] ================================================================== [ 31.408385] Disabling lock debugging due to kernel taint [ 34.001845] BUG: Bad rss-counter state mm:00000000cd2faa4b type:MM_FILEPAGES val:33 [ 34.002806] BUG: Bad rss-counter state mm:00000000cd2faa4b type:MM_ANONPAGES val:22 [ 34.575732] BUG: Bad rss-counter state mm:00000000b83fa25a type:MM_FILEPAGES val:33 [ 34.577114] BUG: Bad rss-counter state mm:00000000b83fa25a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52151' (ECDSA) to the list of known hosts. 2023/06/21 07:26:27 fuzzer started 2023/06/21 07:26:27 dialing manager at localhost:36067 2023/06/21 07:26:27 checking machine... 2023/06/21 07:26:27 checking revisions... [ 35.236042] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:26:27 testing simple program... [ 35.289563] cgroup: Unknown subsys name 'net' [ 35.369666] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:26:27 Registers: info registers vcpu 0 RAX=000000006492a622 RBX=00007f77626907c0 RCX=000000000000003e RDX=0000000000000000 RSI=00007f77626906a0 RDI=00007f7762690698 RBP=0000000000000000 RSP=00007f7762690688 R8 =0000000000000064 R9 =0000000000000001 R10=0000000000000001 R11=00007f77626908b0 R12=00007f77626907b0 R13=0000000000001fa0 R14=00007f775c000ba0 R15=0000000000000003 RIP=00007f7762adf020 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f7762694700 00000000 00000000 GS =0000 0000000000000000 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=00007fba9c598310 CR3=000000000d864000 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=00000000000f3b77000000006492a622 XMM02=2079746972756365732078756e694c45 XMM03=2064656c696146203a656d616e796278 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363639 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=0000000000000007 RBX=00007fb8173e5366 RCX=1ffffffff0ba7530 RDX=0000000000000000 RSI=ffffffff81007b90 RDI=0000000000000007 RBP=00007fb8173e5366 RSP=ffff88800ecff600 R8 =0000000000000007 R9 =ffffffffff600000 R10=00007fb8173e5000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffff888016d7d1c0 R15=0000000000092cc0 RIP=ffffffff811fc73d 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fb816ef2900 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=00007ffcb8b21000 CR3=000000000f0ca000 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