syzkaller login: [ 38.685847] BUG: Bad rss-counter state mm:00000000ae582f33 type:MM_FILEPAGES val:33 [ 38.687139] BUG: Bad rss-counter state mm:00000000ae582f33 type:MM_ANONPAGES val:22 [ 38.859950] ================================================================== [ 38.860962] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.862086] Read of size 8 at addr ffff88800cdf7058 by task sshd/218 [ 38.862936] [ 38.863173] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.864128] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.865207] Call Trace: [ 38.865556] [ 38.865868] dump_stack_lvl+0x91/0xf0 [ 38.866407] print_report+0xcc/0x620 [ 38.866940] ? __virt_addr_valid+0x102/0x340 [ 38.867553] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.868226] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.868922] kasan_report+0xbe/0xf0 [ 38.869447] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.870133] vma_interval_tree_remove+0xc75/0xec0 [ 38.870791] vma_prepare+0xc54/0x11a0 [ 38.871319] __split_vma+0x5af/0x950 [ 38.871838] ? __pfx___split_vma+0x10/0x10 [ 38.872426] ? find_held_lock+0x2c/0x110 [ 38.873019] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.873641] ? lock_is_held_type+0x9f/0x120 [ 38.874236] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.874899] ? mtree_range_walk+0x632/0x900 [ 38.875508] ? mas_walk+0x5c7/0x7c0 [ 38.876030] do_vmi_munmap+0x1f1/0x2b0 [ 38.876570] mmap_region+0x1f9/0x2660 [ 38.877083] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.877602] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.878318] ? __pfx_lock_acquire+0x10/0x10 [ 38.878860] ? __pfx_mmap_region+0x10/0x10 [ 38.879391] ? security_mmap_addr+0x7d/0xa0 [ 38.879936] ? get_unmapped_area+0x1f5/0x3f0 [ 38.880490] do_mmap+0x854/0xf00 [ 38.880945] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.881527] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.882269] ksys_mmap_pgoff+0x3af/0x500 [ 38.882935] do_syscall_64+0x3f/0x90 [ 38.883566] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.884429] RIP: 0033:0x7fd980aebd82 [ 38.885048] 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 [ 38.887871] RSP: 002b:00007ffd26656b48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.889102] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd980aebd82 [ 38.890210] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd97ff25000 [ 38.891334] RBP: 00007fd97ff25000 R08: 0000000000000009 R09: 0000000000001000 [ 38.892438] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ad5e701b20 [ 38.893576] R13: 00007ffd26656b60 R14: 00007ffd26656b90 R15: 00007ffd26656ef0 [ 38.894724] [ 38.895106] [ 38.895391] Allocated by task 211: [ 38.895970] kasan_save_stack+0x22/0x50 [ 38.896627] kasan_set_track+0x25/0x30 [ 38.897296] __kasan_slab_alloc+0x59/0x70 [ 38.897991] kmem_cache_alloc+0x16b/0x370 [ 38.898577] vm_area_dup+0x20/0x160 [ 38.899038] __split_vma+0x170/0x950 [ 38.899509] split_vma+0xc6/0x110 [ 38.899951] mprotect_fixup+0x8d2/0xb30 [ 38.900455] do_mprotect_pkey+0x87e/0xd40 [ 38.900993] __x64_sys_mprotect+0x78/0xc0 [ 38.901519] do_syscall_64+0x3f/0x90 [ 38.901998] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.902651] [ 38.902871] Freed by task 211: [ 38.903265] kasan_save_stack+0x22/0x50 [ 38.903770] kasan_set_track+0x25/0x30 [ 38.904266] kasan_save_free_info+0x2b/0x50 [ 38.904805] __kasan_slab_free+0x10a/0x190 [ 38.905348] kmem_cache_free+0x10d/0x4d0 [ 38.905859] rcu_core+0x8c8/0x2860 [ 38.906312] __do_softirq+0x1b7/0x7d4 [ 38.906800] [ 38.907019] Last potentially related work creation: [ 38.907604] kasan_save_stack+0x22/0x50 [ 38.908112] __kasan_record_aux_stack+0x8e/0xa0 [ 38.908708] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.909381] remove_vma+0x139/0x170 [ 38.909854] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.910448] do_vmi_munmap+0x1f1/0x2b0 [ 38.910964] __vm_munmap+0x138/0x3a0 [ 38.911459] __x64_sys_munmap+0x59/0x80 [ 38.911982] do_syscall_64+0x3f/0x90 [ 38.912478] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.913165] [ 38.913394] The buggy address belongs to the object at ffff88800cdf7000 [ 38.913394] which belongs to the cache vm_area_struct of size 168 [ 38.914969] The buggy address is located 88 bytes inside of [ 38.914969] freed 168-byte region [ffff88800cdf7000, ffff88800cdf70a8) [ 38.916482] [ 38.916746] The buggy address belongs to the physical page: [ 38.917455] page:00000000c75eef12 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcdf7 [ 38.918627] memcg:ffff88800e9a9301 [ 38.919089] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.919779] page_type: 0xffffffff() [ 38.920264] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.921262] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e9a9301 [ 38.922237] page dumped because: kasan: bad access detected [ 38.922944] [ 38.923173] Memory state around the buggy address: [ 38.923791] ffff88800cdf6f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 38.924730] ffff88800cdf6f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.925650] >ffff88800cdf7000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.926557] ^ [ 38.927345] ffff88800cdf7080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 38.928293] ffff88800cdf7100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.929240] ================================================================== [ 38.930397] Disabling lock debugging due to kernel taint [ 40.850758] BUG: Bad rss-counter state mm:00000000aaf75d33 type:MM_FILEPAGES val:33 [ 40.851739] BUG: Bad rss-counter state mm:00000000aaf75d33 type:MM_ANONPAGES val:22 [ 41.324812] BUG: Bad rss-counter state mm:0000000068196bb5 type:MM_FILEPAGES val:33 [ 41.325962] BUG: Bad rss-counter state mm:0000000068196bb5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24525' (ECDSA) to the list of known hosts. 2023/06/20 21:14:18 fuzzer started 2023/06/20 21:14:18 dialing manager at localhost:36067 2023/06/20 21:14:18 checking machine... 2023/06/20 21:14:18 checking revisions... [ 41.962374] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:14:19 testing simple program... [ 42.019758] cgroup: Unknown subsys name 'net' [ 42.071586] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:14:18 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=0000000000000001 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=00007ffe479f5b98 CR3=0000000005482000 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=00007f509d2f651000005594728c3790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000005 RBX=ffff88800e91d000 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800e91d000 RBP=ffff888018067c48 RSP=ffff888018067b20 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff88800e91d4f8 R13=00000000000000e4 R14=ffff888008fe8000 R15=ffff88800e91d000 RIP=ffffffff83655214 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 00007f7b249ad900 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=00007f7b24f64618 CR3=000000000c680000 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=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