syzkaller login: [ 30.894361] BUG: Bad rss-counter state mm:00000000dbc7f27a type:MM_FILEPAGES val:33 [ 30.895354] BUG: Bad rss-counter state mm:00000000dbc7f27a type:MM_ANONPAGES val:22 [ 31.061232] ================================================================== [ 31.062147] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.063109] Read of size 8 at addr ffff888019a784e0 by task sshd/220 [ 31.063888] [ 31.064215] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.065092] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.066062] Call Trace: [ 31.066406] [ 31.066689] dump_stack_lvl+0x91/0xf0 [ 31.067173] print_report+0xcc/0x620 [ 31.067655] ? __virt_addr_valid+0x102/0x340 [ 31.068201] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.068808] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.069423] kasan_report+0xbe/0xf0 [ 31.069894] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.070543] vma_interval_tree_remove+0xc75/0xec0 [ 31.071168] vma_prepare+0xc54/0x11a0 [ 31.071670] __split_vma+0x5af/0x950 [ 31.072151] ? __pfx___split_vma+0x10/0x10 [ 31.072700] ? find_held_lock+0x2c/0x110 [ 31.073241] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.073822] ? lock_is_held_type+0x9f/0x120 [ 31.074406] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.075033] ? mtree_range_walk+0x632/0x900 [ 31.075607] ? mas_walk+0x5c7/0x7c0 [ 31.076093] do_vmi_munmap+0x1f1/0x2b0 [ 31.076597] mmap_region+0x1f9/0x2660 [ 31.077097] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.077626] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.078387] ? __pfx_lock_acquire+0x10/0x10 [ 31.078938] ? __pfx_mmap_region+0x10/0x10 [ 31.079487] ? security_mmap_addr+0x7d/0xa0 [ 31.080034] ? get_unmapped_area+0x1f5/0x3f0 [ 31.080605] do_mmap+0x854/0xf00 [ 31.081055] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.081572] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.082160] ksys_mmap_pgoff+0x3af/0x500 [ 31.082721] do_syscall_64+0x3f/0x90 [ 31.083217] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.083894] RIP: 0033:0x7f1d2c6c7d82 [ 31.084368] 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 [ 31.086604] RSP: 002b:00007fff92f5eb28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.087533] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1d2c6c7d82 [ 31.088412] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1d2bb01000 [ 31.089292] RBP: 00007f1d2bb01000 R08: 0000000000000009 R09: 0000000000001000 [ 31.090167] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e03a79a980 [ 31.091060] R13: 00007fff92f5eb40 R14: 00007fff92f5eb70 R15: 00007fff92f5eed0 [ 31.091954] [ 31.092257] [ 31.092478] Allocated by task 213: [ 31.092921] kasan_save_stack+0x22/0x50 [ 31.093439] kasan_set_track+0x25/0x30 [ 31.093948] __kasan_slab_alloc+0x59/0x70 [ 31.094515] kmem_cache_alloc+0x16b/0x370 [ 31.095058] vm_area_dup+0x20/0x160 [ 31.095531] __split_vma+0x170/0x950 [ 31.096012] split_vma+0xc6/0x110 [ 31.096457] mprotect_fixup+0x8d2/0xb30 [ 31.096973] do_mprotect_pkey+0x87e/0xd40 [ 31.097520] __x64_sys_mprotect+0x78/0xc0 [ 31.098058] do_syscall_64+0x3f/0x90 [ 31.098551] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.099194] [ 31.099410] Freed by task 13: [ 31.099794] kasan_save_stack+0x22/0x50 [ 31.100297] kasan_set_track+0x25/0x30 [ 31.100795] kasan_save_free_info+0x2b/0x50 [ 31.101332] __kasan_slab_free+0x10a/0x190 [ 31.101853] kmem_cache_free+0x10d/0x4d0 [ 31.102361] rcu_core+0x8c8/0x2860 [ 31.102825] __do_softirq+0x1b7/0x7d4 [ 31.103294] [ 31.103504] Last potentially related work creation: [ 31.104087] kasan_save_stack+0x22/0x50 [ 31.104589] __kasan_record_aux_stack+0x8e/0xa0 [ 31.105160] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.105807] remove_vma+0x139/0x170 [ 31.106267] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.106846] do_vmi_munmap+0x1f1/0x2b0 [ 31.107346] __vm_munmap+0x138/0x3a0 [ 31.107819] __x64_sys_munmap+0x59/0x80 [ 31.108319] do_syscall_64+0x3f/0x90 [ 31.108805] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.109452] [ 31.109666] The buggy address belongs to the object at ffff888019a78488 [ 31.109666] which belongs to the cache vm_area_struct of size 168 [ 31.111191] The buggy address is located 88 bytes inside of [ 31.111191] freed 168-byte region [ffff888019a78488, ffff888019a78530) [ 31.112608] [ 31.112823] The buggy address belongs to the physical page: [ 31.113491] page:000000002bc19308 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19a78 [ 31.114598] memcg:ffff888014410801 [ 31.115028] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.115674] page_type: 0xffffffff() [ 31.116125] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.117049] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014410801 [ 31.117964] page dumped because: kasan: bad access detected [ 31.118644] [ 31.118864] Memory state around the buggy address: [ 31.119446] ffff888019a78380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.120309] ffff888019a78400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.121179] >ffff888019a78480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.122036] ^ [ 31.122805] ffff888019a78500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.123669] ffff888019a78580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.124525] ================================================================== [ 31.125514] Disabling lock debugging due to kernel taint [ 33.191727] BUG: Bad rss-counter state mm:000000002339aea4 type:MM_FILEPAGES val:33 [ 33.192705] BUG: Bad rss-counter state mm:000000002339aea4 type:MM_ANONPAGES val:22 [ 33.634749] BUG: Bad rss-counter state mm:0000000027d46ca5 type:MM_FILEPAGES val:33 [ 33.635762] BUG: Bad rss-counter state mm:0000000027d46ca5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53329' (ECDSA) to the list of known hosts. 2023/06/20 12:34:22 fuzzer started 2023/06/20 12:34:23 dialing manager at localhost:36067 2023/06/20 12:34:23 checking machine... 2023/06/20 12:34:23 checking revisions... [ 34.270192] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:34:23 testing simple program... [ 34.312550] cgroup: Unknown subsys name 'net' [ 34.371434] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:34:22 Registers: info registers vcpu 0 RAX=ffffffff8613f413 RBX=0000000000000001 RCX=ffffffff8613f40e RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff8880147bf468 RSP=ffff8880147bf3a0 R8 =ffffffff8613f412 R9 =ffff8880147bf450 R10=0000000000038001 R11=0000000000021e7d R12=ffff8880147bf470 R13=ffff8880147bf458 R14=ffff8880147bf638 R15=ffff8880147bf410 RIP=ffffffff81131134 RFL=00000293 [--S-A-C] 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 00007f2ed11bd900 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=00007f2ed1774618 CR3=000000000f070000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000007 RBX=0000000000000002 RCX=ffffffff84537da6 RDX=000000000003537d RSI=000000000003537d RDI=ffffffff865be7e4 RBP=ffff88806cf09aa8 RSP=ffff88806cf099e0 R8 =0000000000000000 R9 =ffff88806cf09a90 R10=0000000000038001 R11=00000000000b5d59 R12=ffff88806cf09ab0 R13=ffff88806cf09a98 R14=ffff88806cf09a91 R15=ffff88806cf09a50 RIP=ffffffff811307c2 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 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=00007feaa63c71e0 CR3=000000000d8de000 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=10d42abd274ef99e594150e1e160c832 XMM02=ec2efd57dc4c00df000000000011c900 XMM03=2fbf942dc05c28bb000000000011c9d0 XMM04=296582a972f0817d00000000000ae988 XMM05=19e9129bd510f2350000000000133218 XMM06=5ea67cf78ec982b00000000000132080 XMM07=e042d86d42eb936e0000000000123620 XMM08=2fbf942dc05c28bb000000000011c9d0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000