syzkaller login: [ 30.706397] BUG: Bad rss-counter state mm:00000000e731bfae type:MM_FILEPAGES val:33 [ 30.707365] BUG: Bad rss-counter state mm:00000000e731bfae type:MM_ANONPAGES val:22 [ 30.745291] ================================================================== [ 30.746482] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.747553] Read of size 8 at addr ffff888017d06798 by task sshd/220 [ 30.748468] [ 30.748749] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.749807] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.750929] Call Trace: [ 30.751251] [ 30.751541] dump_stack_lvl+0x91/0xf0 [ 30.752049] print_report+0xcc/0x620 [ 30.752540] ? __virt_addr_valid+0x102/0x340 [ 30.753111] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.753746] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.754382] kasan_report+0xbe/0xf0 [ 30.754867] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.755498] vma_interval_tree_remove+0xc75/0xec0 [ 30.756105] vma_prepare+0xc54/0x11a0 [ 30.756606] __split_vma+0x5af/0x950 [ 30.757095] ? __pfx___split_vma+0x10/0x10 [ 30.757632] ? find_held_lock+0x2c/0x110 [ 30.758158] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.758733] ? lock_is_held_type+0x9f/0x120 [ 30.759286] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.759894] ? mtree_range_walk+0x632/0x900 [ 30.760455] ? mas_walk+0x5c7/0x7c0 [ 30.760953] do_vmi_munmap+0x1f1/0x2b0 [ 30.761455] mmap_region+0x1f9/0x2660 [ 30.761940] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.762458] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.763191] ? __pfx_lock_acquire+0x10/0x10 [ 30.763735] ? __pfx_mmap_region+0x10/0x10 [ 30.764270] ? security_mmap_addr+0x7d/0xa0 [ 30.764830] ? get_unmapped_area+0x1f5/0x3f0 [ 30.765394] do_mmap+0x854/0xf00 [ 30.765829] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.766335] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.766904] ksys_mmap_pgoff+0x3af/0x500 [ 30.767413] do_syscall_64+0x3f/0x90 [ 30.767893] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.768548] RIP: 0033:0x7f8272f2cd82 [ 30.769032] 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 [ 30.771203] RSP: 002b:00007ffc0e7e0328 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.772111] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8272f2cd82 [ 30.773015] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8272366000 [ 30.773925] RBP: 00007f8272366000 R08: 0000000000000009 R09: 0000000000001000 [ 30.774838] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ed88f2cf70 [ 30.775755] R13: 00007ffc0e7e0340 R14: 00007ffc0e7e0370 R15: 00007ffc0e7e06d0 [ 30.776685] [ 30.776999] [ 30.777231] Allocated by task 213: [ 30.777695] kasan_save_stack+0x22/0x50 [ 30.778248] kasan_set_track+0x25/0x30 [ 30.778773] __kasan_slab_alloc+0x59/0x70 [ 30.779345] kmem_cache_alloc+0x16b/0x370 [ 30.779895] vm_area_dup+0x20/0x160 [ 30.780389] __split_vma+0x170/0x950 [ 30.780906] split_vma+0xc6/0x110 [ 30.781373] mprotect_fixup+0x8d2/0xb30 [ 30.781915] do_mprotect_pkey+0x87e/0xd40 [ 30.782477] __x64_sys_mprotect+0x78/0xc0 [ 30.783034] do_syscall_64+0x3f/0x90 [ 30.783545] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.784233] [ 30.784472] Freed by task 213: [ 30.784898] kasan_save_stack+0x22/0x50 [ 30.785455] kasan_set_track+0x25/0x30 [ 30.785987] kasan_save_free_info+0x2b/0x50 [ 30.786559] __kasan_slab_free+0x10a/0x190 [ 30.787129] kmem_cache_free+0x10d/0x4d0 [ 30.787685] rcu_core+0x8c8/0x2860 [ 30.788168] __do_softirq+0x1b7/0x7d4 [ 30.788766] [ 30.789014] Last potentially related work creation: [ 30.789647] kasan_save_stack+0x22/0x50 [ 30.790190] __kasan_record_aux_stack+0x8e/0xa0 [ 30.790809] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.791499] remove_vma+0x139/0x170 [ 30.791987] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.792608] do_vmi_munmap+0x1f1/0x2b0 [ 30.793136] __vm_munmap+0x138/0x3a0 [ 30.793640] __x64_sys_munmap+0x59/0x80 [ 30.794175] do_syscall_64+0x3f/0x90 [ 30.794689] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.795381] [ 30.795614] The buggy address belongs to the object at ffff888017d06740 [ 30.795614] which belongs to the cache vm_area_struct of size 168 [ 30.797196] The buggy address is located 88 bytes inside of [ 30.797196] freed 168-byte region [ffff888017d06740, ffff888017d067e8) [ 30.798713] [ 30.798947] The buggy address belongs to the physical page: [ 30.799668] page:000000006b6c80b1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17d06 [ 30.800867] memcg:ffff888016bf2101 [ 30.801329] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.802024] page_type: 0xffffffff() [ 30.802515] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.803494] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016bf2101 [ 30.804468] page dumped because: kasan: bad access detected [ 30.805198] [ 30.805435] Memory state around the buggy address: [ 30.806059] ffff888017d06680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.806986] ffff888017d06700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.807903] >ffff888017d06780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.808846] ^ [ 30.809381] ffff888017d06800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.810308] ffff888017d06880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.811228] ================================================================== [ 30.812257] Disabling lock debugging due to kernel taint [ 32.669262] BUG: Bad rss-counter state mm:00000000abdacd5c type:MM_FILEPAGES val:33 [ 32.669944] BUG: Bad rss-counter state mm:00000000abdacd5c type:MM_ANONPAGES val:22 [ 33.178559] BUG: Bad rss-counter state mm:00000000cf1c769d type:MM_FILEPAGES val:33 [ 33.179268] BUG: Bad rss-counter state mm:00000000cf1c769d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31370' (ECDSA) to the list of known hosts. 2023/06/21 05:53:31 fuzzer started 2023/06/21 05:53:31 dialing manager at localhost:36067 2023/06/21 05:53:31 checking machine... 2023/06/21 05:53:31 checking revisions... [ 33.849516] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:53:31 testing simple program... [ 33.903588] cgroup: Unknown subsys name 'net' [ 33.945350] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:53:31 Registers: info registers vcpu 0 RAX=0000000000003c0d RBX=0000000000000001 RCX=ffffffff810bd032 RDX=0000000000003c13 RSI=0000000000000bd0 RDI=ffffffff864ec934 RBP=ffff88801cdf7988 RSP=ffff88801cdf7870 R8 =0000000000000000 R9 =ffff88801cdf7970 R10=0000000000038001 R11=0000000000003c0d R12=ffff88801cdf7990 R13=ffff88801cdf7978 R14=ffff88801cdf7971 R15=ffff88801cdf7930 RIP=ffffffff81130837 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 00007fdac75f7900 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=00007fdac7bae618 CR3=00000000146e0000 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=563412feff00545000000000000080fe 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f48c8f5b610 CR3=000000000cb7a000 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=1d943e0f986a5282e745ada4fcfc8224 XMM02=000000000011a608ec2efd57dc4c00df XMM03=0000000000121ed09173327c8868f0ea XMM04=18723483ad2cb9ba00000000000ae988 XMM05=886bfcb0a13a72ad0000000000132ae0 XMM06=4fda316b135da52b0000000000131b80 XMM07=e042d86d42eb936e0000000000122150 XMM08=9173327c8868f0ea000000000011a668 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000