syzkaller login: [ 30.392974] BUG: Bad rss-counter state mm:00000000bcc170fc type:MM_FILEPAGES val:33 [ 30.393665] BUG: Bad rss-counter state mm:00000000bcc170fc type:MM_ANONPAGES val:22 [ 30.517844] ================================================================== [ 30.518532] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.519163] Read of size 8 at addr ffff88801594dc20 by task sshd/222 [ 30.519689] [ 30.519832] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.520419] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.521090] Call Trace: [ 30.521308] [ 30.521499] dump_stack_lvl+0x91/0xf0 [ 30.521829] print_report+0xcc/0x620 [ 30.522173] ? __virt_addr_valid+0x102/0x340 [ 30.522811] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.523229] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.523671] kasan_report+0xbe/0xf0 [ 30.523995] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.524419] vma_interval_tree_remove+0xc75/0xec0 [ 30.524896] vma_prepare+0xc54/0x11a0 [ 30.525210] __split_vma+0x5af/0x950 [ 30.525528] ? __pfx___split_vma+0x10/0x10 [ 30.525871] ? find_held_lock+0x2c/0x110 [ 30.526196] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.526557] ? lock_is_held_type+0x9f/0x120 [ 30.526894] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.527273] ? mtree_range_walk+0x632/0x900 [ 30.527636] ? mas_walk+0x5c7/0x7c0 [ 30.527947] do_vmi_munmap+0x1f1/0x2b0 [ 30.528277] mmap_region+0x1f9/0x2660 [ 30.528626] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.529001] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.529481] ? __pfx_lock_acquire+0x10/0x10 [ 30.529857] ? __pfx_mmap_region+0x10/0x10 [ 30.530227] ? security_mmap_addr+0x7d/0xa0 [ 30.530593] ? get_unmapped_area+0x1f5/0x3f0 [ 30.530945] do_mmap+0x854/0xf00 [ 30.531223] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.531548] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.531901] ksys_mmap_pgoff+0x3af/0x500 [ 30.532232] do_syscall_64+0x3f/0x90 [ 30.532552] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.533043] RIP: 0033:0x7f2504f5ed82 [ 30.533341] 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 [ 30.534700] RSP: 002b:00007ffd4e257fe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.535299] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2504f5ed82 [ 30.535901] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2504398000 [ 30.536465] RBP: 00007f2504398000 R08: 0000000000000009 R09: 0000000000001000 [ 30.537047] R10: 0000000000000812 R11: 0000000000000206 R12: 000055837447aec0 [ 30.537610] R13: 00007ffd4e258000 R14: 00007ffd4e258030 R15: 00007ffd4e258390 [ 30.538172] [ 30.538356] [ 30.538521] Allocated by task 215: [ 30.538800] kasan_save_stack+0x22/0x50 [ 30.539133] kasan_set_track+0x25/0x30 [ 30.539440] __kasan_slab_alloc+0x59/0x70 [ 30.539807] kmem_cache_alloc+0x16b/0x370 [ 30.540142] vm_area_dup+0x20/0x160 [ 30.540429] __split_vma+0x170/0x950 [ 30.540724] split_vma+0xc6/0x110 [ 30.541037] mprotect_fixup+0x8d2/0xb30 [ 30.541349] do_mprotect_pkey+0x87e/0xd40 [ 30.541687] __x64_sys_mprotect+0x78/0xc0 [ 30.542022] do_syscall_64+0x3f/0x90 [ 30.542330] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.542738] [ 30.542876] Freed by task 215: [ 30.543140] kasan_save_stack+0x22/0x50 [ 30.543462] kasan_set_track+0x25/0x30 [ 30.543779] kasan_save_free_info+0x2b/0x50 [ 30.544114] __kasan_slab_free+0x10a/0x190 [ 30.544486] kmem_cache_free+0x10d/0x4d0 [ 30.544878] rcu_core+0x8c8/0x2860 [ 30.545191] __do_softirq+0x1b7/0x7d4 [ 30.545520] [ 30.545668] Last potentially related work creation: [ 30.546066] kasan_save_stack+0x22/0x50 [ 30.546388] __kasan_record_aux_stack+0x8e/0xa0 [ 30.546765] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.547179] remove_vma+0x139/0x170 [ 30.547486] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.547854] do_vmi_munmap+0x1f1/0x2b0 [ 30.548170] __vm_munmap+0x138/0x3a0 [ 30.548485] __x64_sys_munmap+0x59/0x80 [ 30.548867] do_syscall_64+0x3f/0x90 [ 30.549177] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.549583] [ 30.549715] The buggy address belongs to the object at ffff88801594dbc8 [ 30.549715] which belongs to the cache vm_area_struct of size 168 [ 30.550648] The buggy address is located 88 bytes inside of [ 30.550648] freed 168-byte region [ffff88801594dbc8, ffff88801594dc70) [ 30.551555] [ 30.551695] The buggy address belongs to the physical page: [ 30.552113] page:000000000a5e57dc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1594d [ 30.552879] memcg:ffff8880096e1d01 [ 30.553161] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.553654] page_type: 0xffffffff() [ 30.553955] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.554581] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880096e1d01 [ 30.555231] page dumped because: kasan: bad access detected [ 30.555703] [ 30.555863] Memory state around the buggy address: [ 30.556244] ffff88801594db00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.556850] ffff88801594db80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.557428] >ffff88801594dc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.557981] ^ [ 30.558337] ffff88801594dc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.558908] ffff88801594dd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.559515] ================================================================== [ 30.560368] Disabling lock debugging due to kernel taint [ 32.098595] BUG: Bad rss-counter state mm:000000005cc4de18 type:MM_FILEPAGES val:33 [ 32.099361] BUG: Bad rss-counter state mm:000000005cc4de18 type:MM_ANONPAGES val:22 [ 32.399645] BUG: Bad rss-counter state mm:00000000af84af6c type:MM_FILEPAGES val:33 [ 32.400383] BUG: Bad rss-counter state mm:00000000af84af6c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14881' (ECDSA) to the list of known hosts. 2023/06/21 08:57:47 fuzzer started 2023/06/21 08:57:47 dialing manager at localhost:36067 2023/06/21 08:57:47 checking machine... 2023/06/21 08:57:47 checking revisions... [ 32.997312] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:57:47 testing simple program... [ 33.034753] cgroup: Unknown subsys name 'net' [ 33.066235] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:57:47 Registers: info registers vcpu 0 RAX=ffff88806ce0a001 RBX=ffff88806ce09a98 RCX=0000000000000002 RDX=ffff88806ce09b01 RSI=ffff88806ce09bc8 RDI=ffff88806ce09aa8 RBP=ffff88806ce09bc8 RSP=ffff88806ce099f0 R8 =ffffffff860d825a R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000010b8d R12=0000000000000008 R13=ffff88806ce02000 R14=ffff88806ce09bd0 R15=ffff88806ce09a98 RIP=ffffffff8113048d RFL=00000287 [--S--PC] 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=00007fc36a67bc50 CR3=000000000cc76000 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=83f0cf6a439336af2e4b4e8b07db851a XMM02=2c67c8bc2e329bc3000000000011b340 XMM03=fb795ef6d65770560000000000122068 XMM04=e1db175796566b1d00000000000ae988 XMM05=59d5b690e0af863b0000000000131ec8 XMM06=d1041460aaef35440000000000130d30 XMM07=e042d86d42eb936e00000000001222e8 XMM08=39c5a1e7abbbd232000000000011b3a0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000001 RSI=ffffffff8486f160 RDI=ffff88801983b191 RBP=ffff88801983b170 RSP=ffff888015a8fcf8 R8 =0000000000000002 R9 =0000000000000000 R10=ffff88801983b147 R11=0000000000000000 R12=ffffffff870a85a0 R13=0000000000000000 R14=ffffffff87b6a200 R15=0000000000000000 RIP=ffffffff812db44e 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 00007fac2dafa900 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=00007ffccac46000 CR3=0000000016f8e000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000