syzkaller login: [ 28.819909] BUG: Bad rss-counter state mm:00000000826ad343 type:MM_FILEPAGES val:33 [ 28.821086] BUG: Bad rss-counter state mm:00000000826ad343 type:MM_ANONPAGES val:22 [ 28.866397] ================================================================== [ 28.867560] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.868608] Read of size 8 at addr ffff88801a230ed8 by task sshd/220 [ 28.869373] [ 28.869586] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.870469] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.871446] Call Trace: [ 28.871781] [ 28.872072] dump_stack_lvl+0x91/0xf0 [ 28.872568] print_report+0xcc/0x620 [ 28.873048] ? __virt_addr_valid+0x102/0x340 [ 28.873599] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.874212] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.874819] kasan_report+0xbe/0xf0 [ 28.875301] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.875950] vma_interval_tree_remove+0xc75/0xec0 [ 28.876559] vma_prepare+0xc54/0x11a0 [ 28.877040] __split_vma+0x5af/0x950 [ 28.877524] ? __pfx___split_vma+0x10/0x10 [ 28.878056] ? find_held_lock+0x2c/0x110 [ 28.878585] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.879143] ? lock_is_held_type+0x9f/0x120 [ 28.879694] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.880295] ? mtree_range_walk+0x632/0x900 [ 28.880839] ? mas_walk+0x5c7/0x7c0 [ 28.881323] do_vmi_munmap+0x1f1/0x2b0 [ 28.881816] mmap_region+0x1f9/0x2660 [ 28.882301] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.882808] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.883519] ? __pfx_lock_acquire+0x10/0x10 [ 28.884050] ? __pfx_mmap_region+0x10/0x10 [ 28.884584] ? security_mmap_addr+0x7d/0xa0 [ 28.885109] ? get_unmapped_area+0x1f5/0x3f0 [ 28.885662] do_mmap+0x854/0xf00 [ 28.886100] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.886591] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.887146] ksys_mmap_pgoff+0x3af/0x500 [ 28.887676] do_syscall_64+0x3f/0x90 [ 28.888155] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.888808] RIP: 0033:0x7f5b045b6d82 [ 28.889271] 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 [ 28.891392] RSP: 002b:00007ffc73b6f268 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.892308] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5b045b6d82 [ 28.893157] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5b039f0000 [ 28.893996] RBP: 00007f5b039f0000 R08: 0000000000000009 R09: 0000000000001000 [ 28.894839] R10: 0000000000000812 R11: 0000000000000206 R12: 000056473f185ec0 [ 28.895714] R13: 00007ffc73b6f280 R14: 00007ffc73b6f2b0 R15: 00007ffc73b6f610 [ 28.896559] [ 28.896853] [ 28.897065] Allocated by task 213: [ 28.897488] kasan_save_stack+0x22/0x50 [ 28.897987] kasan_set_track+0x25/0x30 [ 28.898482] __kasan_slab_alloc+0x59/0x70 [ 28.899002] kmem_cache_alloc+0x16b/0x370 [ 28.899511] vm_area_dup+0x20/0x160 [ 28.899974] __split_vma+0x170/0x950 [ 28.900435] split_vma+0xc6/0x110 [ 28.900872] mprotect_fixup+0x8d2/0xb30 [ 28.901385] do_mprotect_pkey+0x87e/0xd40 [ 28.901906] __x64_sys_mprotect+0x78/0xc0 [ 28.902425] do_syscall_64+0x3f/0x90 [ 28.902907] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.903543] [ 28.903763] Freed by task 213: [ 28.904154] kasan_save_stack+0x22/0x50 [ 28.904650] kasan_set_track+0x25/0x30 [ 28.905140] kasan_save_free_info+0x2b/0x50 [ 28.905665] __kasan_slab_free+0x10a/0x190 [ 28.906196] kmem_cache_free+0x10d/0x4d0 [ 28.906706] rcu_core+0x8c8/0x2860 [ 28.907150] __do_softirq+0x1b7/0x7d4 [ 28.907641] [ 28.907858] Last potentially related work creation: [ 28.908435] kasan_save_stack+0x22/0x50 [ 28.908938] __kasan_record_aux_stack+0x8e/0xa0 [ 28.909582] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.910225] remove_vma+0x139/0x170 [ 28.910670] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.911218] do_vmi_munmap+0x1f1/0x2b0 [ 28.911707] __vm_munmap+0x138/0x3a0 [ 28.912171] __x64_sys_munmap+0x59/0x80 [ 28.912666] do_syscall_64+0x3f/0x90 [ 28.913137] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.913786] [ 28.913998] The buggy address belongs to the object at ffff88801a230e80 [ 28.913998] which belongs to the cache vm_area_struct of size 168 [ 28.915451] The buggy address is located 88 bytes inside of [ 28.915451] freed 168-byte region [ffff88801a230e80, ffff88801a230f28) [ 28.916869] [ 28.917086] The buggy address belongs to the physical page: [ 28.917744] page:000000006e4081ea refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a230 [ 28.918823] memcg:ffff888016fd2001 [ 28.919243] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.919885] page_type: 0xffffffff() [ 28.920327] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.921249] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016fd2001 [ 28.922204] page dumped because: kasan: bad access detected [ 28.922898] [ 28.923122] Memory state around the buggy address: [ 28.923745] ffff88801a230d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.924656] ffff88801a230e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 28.925557] >ffff88801a230e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.926452] ^ [ 28.927223] ffff88801a230f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 28.928149] ffff88801a230f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.929044] ================================================================== [ 28.930020] Disabling lock debugging due to kernel taint [ 31.612594] BUG: Bad rss-counter state mm:00000000444837f7 type:MM_FILEPAGES val:31 [ 31.613337] BUG: Bad rss-counter state mm:00000000444837f7 type:MM_ANONPAGES val:22 [ 32.039291] BUG: Bad rss-counter state mm:0000000057a872ce type:MM_FILEPAGES val:33 [ 32.040414] BUG: Bad rss-counter state mm:0000000057a872ce type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3046' (ECDSA) to the list of known hosts. 2023/06/21 03:20:48 fuzzer started 2023/06/21 03:20:48 dialing manager at localhost:36067 2023/06/21 03:20:48 checking machine... 2023/06/21 03:20:48 checking revisions... [ 32.776757] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:20:49 testing simple program... [ 32.828880] cgroup: Unknown subsys name 'net' [ 32.880434] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:20:48 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff110028eae62 RSI=ffffffff846000aa RDI=ffff888014757310 RBP=ffff8880147573a8 RSP=ffff8880147572e8 R8 =0000000000000001 R9 =ffff888014757350 R10=0000000000038001 R11=00000000000b5080 R12=ffff8880147573d8 R13=0000000000000000 R14=ffff888014758000 R15=ffff888014757310 RIP=ffffffff811305f0 RFL=00000212 [----A--] 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 00007febdfac3900 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=00007febdeed5f50 CR3=000000000d93e000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=05a690747355377b00000000000ae988 XMM05=d1c8c29b7a6547f80000000000132f30 XMM06=b77689d82f24e47c0000000000131fd8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88801999e178 RCX=0000000000000000 RDX=1ffffffff09a5d9c RSI=ffffffff818c666d RDI=ffffffff84d2ece0 RBP=ffffffff84d2ec80 RSP=ffff888015e8fd00 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=ffff88801999e250 R14=0000000000000000 R15=ffff88801999e1e8 RIP=ffffffff818c6691 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 00007f5cee6d2900 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=00007f5ceec89618 CR3=0000000019f9e000 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