[ 31.341269] BUG: Bad rss-counter state mm:000000003a8757f0 type:MM_FILEPAGES val:33 [ 31.342341] BUG: Bad rss-counter state mm:000000003a8757f0 type:MM_ANONPAGES val:22 [ 31.516171] ================================================================== [ 31.517227] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.518452] Read of size 8 at addr ffff88801b8f23f8 by task sshd/220 [ 31.519327] [ 31.519578] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.520592] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.521711] Call Trace: [ 31.522081] [ 31.522404] dump_stack_lvl+0x91/0xf0 [ 31.522972] print_report+0xcc/0x620 [ 31.523537] ? __virt_addr_valid+0x102/0x340 [ 31.524165] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.524882] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.525594] kasan_report+0xbe/0xf0 [ 31.526190] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.526977] vma_interval_tree_remove+0xc75/0xec0 [ 31.527702] vma_prepare+0xc54/0x11a0 [ 31.528274] __split_vma+0x5af/0x950 [ 31.528822] ? __pfx___split_vma+0x10/0x10 [ 31.529437] ? find_held_lock+0x2c/0x110 [ 31.530071] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.530734] ? lock_is_held_type+0x9f/0x120 [ 31.531361] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.532075] ? mtree_range_walk+0x632/0x900 [ 31.532724] ? mas_walk+0x5c7/0x7c0 [ 31.533279] do_vmi_munmap+0x1f1/0x2b0 [ 31.533869] mmap_region+0x1f9/0x2660 [ 31.534419] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.535027] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.535886] ? __pfx_lock_acquire+0x10/0x10 [ 31.536528] ? __pfx_mmap_region+0x10/0x10 [ 31.537173] ? security_mmap_addr+0x7d/0xa0 [ 31.537837] ? get_unmapped_area+0x1f5/0x3f0 [ 31.538507] do_mmap+0x854/0xf00 [ 31.539042] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.539652] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.540332] ksys_mmap_pgoff+0x3af/0x500 [ 31.540936] do_syscall_64+0x3f/0x90 [ 31.541509] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.542300] RIP: 0033:0x7fb327964d82 [ 31.542827] 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 [ 31.545258] RSP: 002b:00007fff6a5367b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.546301] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb327964d82 [ 31.547266] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb326d9e000 [ 31.548226] RBP: 00007fb326d9e000 R08: 0000000000000009 R09: 0000000000001000 [ 31.549208] R10: 0000000000000812 R11: 0000000000000206 R12: 000056298bd8cb20 [ 31.550186] R13: 00007fff6a5367d0 R14: 00007fff6a536800 R15: 00007fff6a536b60 [ 31.551179] [ 31.551532] [ 31.551791] Allocated by task 212: [ 31.552308] kasan_save_stack+0x22/0x50 [ 31.552910] kasan_set_track+0x25/0x30 [ 31.553513] __kasan_slab_alloc+0x59/0x70 [ 31.554159] kmem_cache_alloc+0x16b/0x370 [ 31.554761] vm_area_dup+0x20/0x160 [ 31.555275] __split_vma+0x170/0x950 [ 31.555802] split_vma+0xc6/0x110 [ 31.556303] mprotect_fixup+0x8d2/0xb30 [ 31.556881] do_mprotect_pkey+0x87e/0xd40 [ 31.557472] __x64_sys_mprotect+0x78/0xc0 [ 31.558081] do_syscall_64+0x3f/0x90 [ 31.558623] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.559358] [ 31.559605] Freed by task 212: [ 31.560135] kasan_save_stack+0x22/0x50 [ 31.560744] kasan_set_track+0x25/0x30 [ 31.561333] kasan_save_free_info+0x2b/0x50 [ 31.561987] __kasan_slab_free+0x10a/0x190 [ 31.562624] kmem_cache_free+0x10d/0x4d0 [ 31.563239] rcu_core+0x8c8/0x2860 [ 31.563753] __do_softirq+0x1b7/0x7d4 [ 31.564339] [ 31.564601] Last potentially related work creation: [ 31.565308] kasan_save_stack+0x22/0x50 [ 31.565922] __kasan_record_aux_stack+0x8e/0xa0 [ 31.566594] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.567354] remove_vma+0x139/0x170 [ 31.567890] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.568561] do_vmi_munmap+0x1f1/0x2b0 [ 31.569147] __vm_munmap+0x138/0x3a0 [ 31.569717] __x64_sys_munmap+0x59/0x80 [ 31.570307] do_syscall_64+0x3f/0x90 [ 31.570866] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.571622] [ 31.571878] The buggy address belongs to the object at ffff88801b8f23a0 [ 31.571878] which belongs to the cache vm_area_struct of size 168 [ 31.573635] The buggy address is located 88 bytes inside of [ 31.573635] freed 168-byte region [ffff88801b8f23a0, ffff88801b8f2448) [ 31.575307] [ 31.575563] The buggy address belongs to the physical page: [ 31.576345] page:0000000060bed047 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1b8f2 [ 31.577636] memcg:ffff88801b8c3d01 [ 31.578162] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.578917] page_type: 0xffffffff() [ 31.579441] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.580473] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801b8c3d01 [ 31.581490] page dumped because: kasan: bad access detected [ 31.582244] [ 31.582494] Memory state around the buggy address: [ 31.583151] ffff88801b8f2280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.584113] ffff88801b8f2300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.585069] >ffff88801b8f2380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.586070] ^ [ 31.587041] ffff88801b8f2400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.588034] ffff88801b8f2480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.589123] ================================================================== [ 31.590337] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.508658] BUG: Bad rss-counter state mm:000000005b4dde0f type:MM_FILEPAGES val:33 [ 33.509501] BUG: Bad rss-counter state mm:000000005b4dde0f type:MM_ANONPAGES val:22 [ 34.066874] BUG: Bad rss-counter state mm:00000000c9d1c781 type:MM_FILEPAGES val:33 [ 34.068048] BUG: Bad rss-counter state mm:00000000c9d1c781 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45347' (ECDSA) to the list of known hosts. 2023/06/21 08:31:11 fuzzer started 2023/06/21 08:31:11 dialing manager at localhost:36067 2023/06/21 08:31:11 checking machine... 2023/06/21 08:31:11 checking revisions... [ 34.731206] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:31:11 testing simple program... [ 34.774814] cgroup: Unknown subsys name 'net' [ 34.814698] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:31:11 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce35000 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff11002855fa6 RSP=ffff8880142afd10 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffffffff8560b640 R13=ffffffff817170b1 R14=00000000ffffffff R15=ffff8880101eda28 RIP=ffffffff8135b960 RFL=00000216 [----AP-] 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 00007f67e3cb8900 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=000055c83e0a4704 CR3=000000001363e000 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=0000000000000000000055c83d8c3060 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 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=ffff888008c04400 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=00007f5cd4138d20 CR3=000000000f526000 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=de36438acf4413806c4d563496a634f6 XMM02=eff9b2d0a8fce9cb000000000011a7b8 XMM03=2c67c8bc2e329bc3000000000011a8e0 XMM04=4f3c84234d283b1700000000000ae988 XMM05=91920fde52cb26880000000000132628 XMM06=e4cb8bb95a7664b60000000000131150 XMM07=fb795ef6d65770560000000000121630 XMM08=2c67c8bc2e329bc3000000000011a8e0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000