syzkaller login: [ 61.329895] BUG: Bad rss-counter state mm:00000000c93df4f5 type:MM_FILEPAGES val:33 [ 61.331225] BUG: Bad rss-counter state mm:00000000c93df4f5 type:MM_ANONPAGES val:22 [ 61.504250] ================================================================== [ 61.505159] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.506101] Read of size 8 at addr ffff88800ef19968 by task sshd/220 [ 61.506860] [ 61.507179] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.508030] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.508989] Call Trace: [ 61.509328] [ 61.509611] dump_stack_lvl+0x91/0xf0 [ 61.510118] print_report+0xcc/0x620 [ 61.510592] ? __virt_addr_valid+0x102/0x340 [ 61.511136] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.511747] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.512352] kasan_report+0xbe/0xf0 [ 61.512821] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.513441] vma_interval_tree_remove+0xc75/0xec0 [ 61.514043] vma_prepare+0xc54/0x11a0 [ 61.514527] __split_vma+0x5af/0x950 [ 61.514997] ? __pfx___split_vma+0x10/0x10 [ 61.515531] ? find_held_lock+0x2c/0x110 [ 61.516046] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.516605] ? lock_is_held_type+0x9f/0x120 [ 61.517145] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.517767] ? mtree_range_walk+0x632/0x900 [ 61.518332] ? mas_walk+0x5c7/0x7c0 [ 61.518803] do_vmi_munmap+0x1f1/0x2b0 [ 61.519305] mmap_region+0x1f9/0x2660 [ 61.519784] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.520301] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.521019] ? __pfx_lock_acquire+0x10/0x10 [ 61.521546] ? __pfx_mmap_region+0x10/0x10 [ 61.522088] ? security_mmap_addr+0x7d/0xa0 [ 61.522677] ? get_unmapped_area+0x1f5/0x3f0 [ 61.523282] do_mmap+0x854/0xf00 [ 61.523770] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.524326] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.524950] ksys_mmap_pgoff+0x3af/0x500 [ 61.525512] do_syscall_64+0x3f/0x90 [ 61.526047] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.526770] RIP: 0033:0x7f6b835e4d82 [ 61.527281] 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 [ 61.529764] RSP: 002b:00007ffc85892358 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.530805] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6b835e4d82 [ 61.531770] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6b82a1e000 [ 61.532726] RBP: 00007f6b82a1e000 R08: 0000000000000009 R09: 0000000000001000 [ 61.533650] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a84ed97ec0 [ 61.534526] R13: 00007ffc85892370 R14: 00007ffc858923a0 R15: 00007ffc85892700 [ 61.535399] [ 61.535704] [ 61.535921] Allocated by task 213: [ 61.536359] kasan_save_stack+0x22/0x50 [ 61.536883] kasan_set_track+0x25/0x30 [ 61.537389] __kasan_slab_alloc+0x59/0x70 [ 61.537970] kmem_cache_alloc+0x16b/0x370 [ 61.538508] vm_area_dup+0x20/0x160 [ 61.538975] __split_vma+0x170/0x950 [ 61.539453] split_vma+0xc6/0x110 [ 61.539906] mprotect_fixup+0x8d2/0xb30 [ 61.540448] do_mprotect_pkey+0x87e/0xd40 [ 61.540992] __x64_sys_mprotect+0x78/0xc0 [ 61.541565] do_syscall_64+0x3f/0x90 [ 61.542124] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.542862] [ 61.543104] Freed by task 213: [ 61.543543] kasan_save_stack+0x22/0x50 [ 61.544119] kasan_set_track+0x25/0x30 [ 61.544682] kasan_save_free_info+0x2b/0x50 [ 61.545296] __kasan_slab_free+0x10a/0x190 [ 61.545910] kmem_cache_free+0x10d/0x4d0 [ 61.546642] rcu_core+0x8c8/0x2860 [ 61.547172] __do_softirq+0x1b7/0x7d4 [ 61.547706] [ 61.547950] Last potentially related work creation: [ 61.548644] kasan_save_stack+0x22/0x50 [ 61.549236] __kasan_record_aux_stack+0x8e/0xa0 [ 61.549900] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.550636] remove_vma+0x139/0x170 [ 61.551150] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.551784] do_vmi_munmap+0x1f1/0x2b0 [ 61.552334] __vm_munmap+0x138/0x3a0 [ 61.552872] __x64_sys_munmap+0x59/0x80 [ 61.553428] do_syscall_64+0x3f/0x90 [ 61.553981] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.554715] [ 61.554969] The buggy address belongs to the object at ffff88800ef19910 [ 61.554969] which belongs to the cache vm_area_struct of size 168 [ 61.556648] The buggy address is located 88 bytes inside of [ 61.556648] freed 168-byte region [ffff88800ef19910, ffff88800ef199b8) [ 61.558232] [ 61.558478] The buggy address belongs to the physical page: [ 61.559236] page:000000007ce3d31c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef19 [ 61.560478] memcg:ffff88801815aa01 [ 61.560966] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.561686] page_type: 0xffffffff() [ 61.562202] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 61.563234] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801815aa01 [ 61.564261] page dumped because: kasan: bad access detected [ 61.565003] [ 61.565244] Memory state around the buggy address: [ 61.565907] ffff88800ef19800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 61.566882] ffff88800ef19880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 61.567857] >ffff88800ef19900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.568811] ^ [ 61.569698] ffff88800ef19980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 61.570675] ffff88800ef19a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.571642] ================================================================== [ 61.572817] Disabling lock debugging due to kernel taint [ 63.517069] BUG: Bad rss-counter state mm:000000004f3790f8 type:MM_FILEPAGES val:33 [ 63.518111] BUG: Bad rss-counter state mm:000000004f3790f8 type:MM_ANONPAGES val:22 [ 64.008454] BUG: Bad rss-counter state mm:00000000df24350d type:MM_FILEPAGES val:33 [ 64.009427] BUG: Bad rss-counter state mm:00000000df24350d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17912' (ECDSA) to the list of known hosts. 2023/06/21 01:43:15 fuzzer started 2023/06/21 01:43:15 dialing manager at localhost:36067 2023/06/21 01:43:15 checking machine... 2023/06/21 01:43:15 checking revisions... [ 64.748705] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:43:15 testing simple program... [ 64.793620] cgroup: Unknown subsys name 'net' [ 64.831228] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:43:15 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800fe88000 RCX=0000000000000000 RDX=1ffff11001fd1028 RSI=ffffffff816b65c2 RDI=ffff88800fe88140 RBP=ffff8880193a2a50 RSP=ffff8880090bfa48 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000128 R12=ffff8880193a2c78 R13=ffff8880193a2e30 R14=0000000000000001 R15=ffff8880193a2c80 RIP=ffffffff816b65de 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=00007f31ac317000 CR3=000000000df6a000 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=fabf8b7c7c170ffea16ba7a7080c0c79 XMM02=c88f085d56bbaf99aa9dee6b116a988b XMM03=ab22ad58db6b18adcc28c99a0eb4efda XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=0e0d0c0f0a09080b0605040702010003 XMM08=01000000000000000000000000000001 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000035 RBX=0000000000000035 RCX=0000000000000000 RDX=00000000000101f7 RSI=ffffffff82191d98 RDI=0000000000000007 RBP=ffff88800b9f0000 RSP=ffff88800bac77d0 R8 =0000000000000007 R9 =0000000000010000 R10=00000000000101f7 R11=0000000000000128 R12=00000000000101f7 R13=ffff88800b9f01a0 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff82191d9e RFL=00000093 [--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 =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=00007fff6ac97258 CR3=0000000005482000 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=00007f557b96f510000055c75b808790 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