syzkaller login: [ 38.756345] BUG: Bad rss-counter state mm:00000000a5a2db0d type:MM_FILEPAGES val:33 [ 38.757023] BUG: Bad rss-counter state mm:00000000a5a2db0d type:MM_ANONPAGES val:22 [ 38.877860] ================================================================== [ 38.878827] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.879536] Read of size 8 at addr ffff888019f42968 by task sshd/225 [ 38.880233] [ 38.880398] CPU: 0 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.881053] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.881808] Call Trace: [ 38.882051] [ 38.882286] dump_stack_lvl+0x91/0xf0 [ 38.882661] print_report+0xcc/0x620 [ 38.883029] ? __virt_addr_valid+0x102/0x340 [ 38.883444] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.883918] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.884379] kasan_report+0xbe/0xf0 [ 38.884744] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.885213] vma_interval_tree_remove+0xc75/0xec0 [ 38.885675] vma_prepare+0xc54/0x11a0 [ 38.886070] __split_vma+0x5af/0x950 [ 38.886428] ? __pfx___split_vma+0x10/0x10 [ 38.886815] ? find_held_lock+0x2c/0x110 [ 38.887178] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.887568] ? lock_is_held_type+0x9f/0x120 [ 38.887920] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.888316] ? mtree_range_walk+0x632/0x900 [ 38.888680] ? mas_walk+0x5c7/0x7c0 [ 38.888991] do_vmi_munmap+0x1f1/0x2b0 [ 38.889312] mmap_region+0x1f9/0x2660 [ 38.889627] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.889969] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.890436] ? __pfx_lock_acquire+0x10/0x10 [ 38.890783] ? __pfx_mmap_region+0x10/0x10 [ 38.891129] ? security_mmap_addr+0x7d/0xa0 [ 38.891476] ? get_unmapped_area+0x1f5/0x3f0 [ 38.891837] do_mmap+0x854/0xf00 [ 38.892123] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.892448] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.892815] ksys_mmap_pgoff+0x3af/0x500 [ 38.893147] do_syscall_64+0x3f/0x90 [ 38.893464] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.893900] RIP: 0033:0x7fef592ebd82 [ 38.894201] 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 [ 38.895594] RSP: 002b:00007ffd9a93a568 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.896187] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fef592ebd82 [ 38.896750] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fef58725000 [ 38.897309] RBP: 00007fef58725000 R08: 0000000000000009 R09: 0000000000001000 [ 38.897882] R10: 0000000000000812 R11: 0000000000000206 R12: 00005611c7768d90 [ 38.898433] R13: 00007ffd9a93a580 R14: 00007ffd9a93a5b0 R15: 00007ffd9a93a910 [ 38.898994] [ 38.899187] [ 38.899328] Allocated by task 218: [ 38.899608] kasan_save_stack+0x22/0x50 [ 38.899941] kasan_set_track+0x25/0x30 [ 38.900261] __kasan_slab_alloc+0x59/0x70 [ 38.900601] kmem_cache_alloc+0x16b/0x370 [ 38.900938] vm_area_dup+0x20/0x160 [ 38.901235] __split_vma+0x170/0x950 [ 38.901543] split_vma+0xc6/0x110 [ 38.901839] mprotect_fixup+0x8d2/0xb30 [ 38.902163] do_mprotect_pkey+0x87e/0xd40 [ 38.902505] __x64_sys_mprotect+0x78/0xc0 [ 38.902852] do_syscall_64+0x3f/0x90 [ 38.903160] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.903582] [ 38.903724] Freed by task 218: [ 38.903979] kasan_save_stack+0x22/0x50 [ 38.904306] kasan_set_track+0x25/0x30 [ 38.904630] kasan_save_free_info+0x2b/0x50 [ 38.904979] __kasan_slab_free+0x10a/0x190 [ 38.905327] kmem_cache_free+0x10d/0x4d0 [ 38.905664] rcu_core+0x8c8/0x2860 [ 38.905970] __do_softirq+0x1b7/0x7d4 [ 38.906286] [ 38.906429] Last potentially related work creation: [ 38.906809] kasan_save_stack+0x22/0x50 [ 38.907138] __kasan_record_aux_stack+0x8e/0xa0 [ 38.907507] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.907923] remove_vma+0x139/0x170 [ 38.908219] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.908579] do_vmi_munmap+0x1f1/0x2b0 [ 38.908898] __vm_munmap+0x138/0x3a0 [ 38.909201] __x64_sys_munmap+0x59/0x80 [ 38.909522] do_syscall_64+0x3f/0x90 [ 38.909836] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.910255] [ 38.910394] The buggy address belongs to the object at ffff888019f42910 [ 38.910394] which belongs to the cache vm_area_struct of size 168 [ 38.911350] The buggy address is located 88 bytes inside of [ 38.911350] freed 168-byte region [ffff888019f42910, ffff888019f429b8) [ 38.912254] [ 38.912393] The buggy address belongs to the physical page: [ 38.912823] page:00000000f893a5eb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f42 [ 38.913529] memcg:ffff888016dbb901 [ 38.913812] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.914228] page_type: 0xffffffff() [ 38.914524] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.915121] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016dbb901 [ 38.915716] page dumped because: kasan: bad access detected [ 38.916143] [ 38.916282] Memory state around the buggy address: [ 38.916660] ffff888019f42800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 38.917214] ffff888019f42880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 38.917768] >ffff888019f42900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.918341] ^ [ 38.918855] ffff888019f42980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 38.919408] ffff888019f42a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.919957] ================================================================== [ 38.920608] Disabling lock debugging due to kernel taint [ 40.246572] BUG: Bad rss-counter state mm:000000000d5a8bef type:MM_FILEPAGES val:33 [ 40.247499] BUG: Bad rss-counter state mm:000000000d5a8bef type:MM_ANONPAGES val:22 [ 40.734019] BUG: Bad rss-counter state mm:000000009ff202dc type:MM_FILEPAGES val:33 [ 40.735145] BUG: Bad rss-counter state mm:000000009ff202dc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25854' (ECDSA) to the list of known hosts. 2023/06/20 20:03:41 fuzzer started 2023/06/20 20:03:42 dialing manager at localhost:36067 2023/06/20 20:03:42 checking machine... 2023/06/20 20:03:42 checking revisions... [ 41.449214] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:03:42 testing simple program... [ 41.495949] cgroup: Unknown subsys name 'net' [ 41.543328] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:03:41 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff814c856d RDX=ffffffff8542a6c0 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000000 RSP=ffff88806ce09a20 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b54e7 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652d08 R15=ffff888009364a00 RIP=ffffffff814c0408 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 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=00007ffeb83f57b8 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=00007fba7508c510000055e1c49a8790 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=0000000080000001 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88801596d1c0 RSI=ffffffff81711f3e RDI=0000000000000001 RBP=ffff888017c47d90 RSP=ffff888017c47bf8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffffea000061c740 R13=ffff88800db86910 R14=ffff888017c47db8 R15=ffffea000061c774 RIP=ffffffff814c086b 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f4ff8e13900 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=00007f4ff9967044 CR3=0000000016e58000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=000000000000000000000000000000ff XMM05=000000000000000000000000000000ff XMM06=6c613b105772292a20322e322e0c2e00 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000