syzkaller login: [ 48.432719] BUG: Bad rss-counter state mm:0000000020110178 type:MM_FILEPAGES val:33 [ 48.434009] BUG: Bad rss-counter state mm:0000000020110178 type:MM_ANONPAGES val:22 [ 48.471118] ================================================================== [ 48.472167] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 48.473282] Read of size 8 at addr ffff88801a819140 by task sshd/220 [ 48.474206] [ 48.474435] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 48.475452] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 48.476500] Call Trace: [ 48.476911] [ 48.477257] dump_stack_lvl+0x91/0xf0 [ 48.477858] print_report+0xcc/0x620 [ 48.478363] ? __virt_addr_valid+0x102/0x340 [ 48.478975] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.479624] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.480284] kasan_report+0xbe/0xf0 [ 48.480782] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.481454] vma_interval_tree_remove+0xc75/0xec0 [ 48.482119] vma_prepare+0xc54/0x11a0 [ 48.482626] __split_vma+0x5af/0x950 [ 48.483150] ? __pfx___split_vma+0x10/0x10 [ 48.483706] ? find_held_lock+0x2c/0x110 [ 48.484258] do_vmi_align_munmap+0x2ba/0x11f0 [ 48.484853] ? lock_is_held_type+0x9f/0x120 [ 48.485425] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 48.486077] ? mtree_range_walk+0x632/0x900 [ 48.486657] ? mas_walk+0x5c7/0x7c0 [ 48.487174] do_vmi_munmap+0x1f1/0x2b0 [ 48.487691] mmap_region+0x1f9/0x2660 [ 48.488202] ? vm_mmap_pgoff+0x15c/0x3a0 [ 48.488744] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 48.489500] ? __pfx_lock_acquire+0x10/0x10 [ 48.490091] ? __pfx_mmap_region+0x10/0x10 [ 48.490655] ? security_mmap_addr+0x7d/0xa0 [ 48.491250] ? get_unmapped_area+0x1f5/0x3f0 [ 48.491850] do_mmap+0x854/0xf00 [ 48.492304] vm_mmap_pgoff+0x1a6/0x3a0 [ 48.492836] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 48.493417] ksys_mmap_pgoff+0x3af/0x500 [ 48.493981] do_syscall_64+0x3f/0x90 [ 48.494485] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.495182] RIP: 0033:0x7ff47b83dd82 [ 48.495670] 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 [ 48.497949] RSP: 002b:00007fff1dae2078 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 48.498945] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff47b83dd82 [ 48.499808] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff47ac77000 [ 48.500668] RBP: 00007ff47ac77000 R08: 0000000000000009 R09: 0000000000001000 [ 48.501548] R10: 0000000000000812 R11: 0000000000000206 R12: 000055890529cb20 [ 48.502423] R13: 00007fff1dae2090 R14: 00007fff1dae20c0 R15: 00007fff1dae2420 [ 48.503329] [ 48.503628] [ 48.503861] Allocated by task 213: [ 48.504311] kasan_save_stack+0x22/0x50 [ 48.504828] kasan_set_track+0x25/0x30 [ 48.505323] __kasan_slab_alloc+0x59/0x70 [ 48.505861] kmem_cache_alloc+0x16b/0x370 [ 48.506382] vm_area_dup+0x20/0x160 [ 48.506873] __split_vma+0x170/0x950 [ 48.507352] split_vma+0xc6/0x110 [ 48.507795] mprotect_fixup+0x8d2/0xb30 [ 48.508314] do_mprotect_pkey+0x87e/0xd40 [ 48.508846] __x64_sys_mprotect+0x78/0xc0 [ 48.509366] do_syscall_64+0x3f/0x90 [ 48.509856] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.510545] [ 48.510855] Freed by task 13: [ 48.511367] kasan_save_stack+0x22/0x50 [ 48.512084] kasan_set_track+0x25/0x30 [ 48.512760] kasan_save_free_info+0x2b/0x50 [ 48.513477] __kasan_slab_free+0x10a/0x190 [ 48.514186] kmem_cache_free+0x10d/0x4d0 [ 48.514874] rcu_core+0x8c8/0x2860 [ 48.515431] __do_softirq+0x1b7/0x7d4 [ 48.515940] [ 48.516160] Last potentially related work creation: [ 48.516746] kasan_save_stack+0x22/0x50 [ 48.517270] __kasan_record_aux_stack+0x8e/0xa0 [ 48.517857] __call_rcu_common.constprop.0+0x6a/0xb90 [ 48.518498] remove_vma+0x139/0x170 [ 48.518968] do_vmi_align_munmap+0xd4a/0x11f0 [ 48.519527] do_vmi_munmap+0x1f1/0x2b0 [ 48.520041] __vm_munmap+0x138/0x3a0 [ 48.520506] __x64_sys_munmap+0x59/0x80 [ 48.521023] do_syscall_64+0x3f/0x90 [ 48.521492] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.522142] [ 48.522357] Second to last potentially related work creation: [ 48.523180] kasan_save_stack+0x22/0x50 [ 48.523832] __kasan_record_aux_stack+0x8e/0xa0 [ 48.524544] __call_rcu_common.constprop.0+0x6a/0xb90 [ 48.525365] remove_vma+0x139/0x170 [ 48.525940] do_vmi_align_munmap+0xd4a/0x11f0 [ 48.526652] do_vmi_munmap+0x1f1/0x2b0 [ 48.527305] mmap_region+0x1f9/0x2660 [ 48.527918] do_mmap+0x854/0xf00 [ 48.528455] vm_mmap_pgoff+0x1a6/0x3a0 [ 48.529088] ksys_mmap_pgoff+0x3af/0x500 [ 48.529733] do_syscall_64+0x3f/0x90 [ 48.530322] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.531155] [ 48.531420] The buggy address belongs to the object at ffff88801a8190e8 [ 48.531420] which belongs to the cache vm_area_struct of size 168 [ 48.533314] The buggy address is located 88 bytes inside of [ 48.533314] freed 168-byte region [ffff88801a8190e8, ffff88801a819190) [ 48.535116] [ 48.535384] The buggy address belongs to the physical page: [ 48.536231] page:00000000f29e6cbf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a819 [ 48.537628] memcg:ffff888018f71d01 [ 48.538169] flags: 0x100000000000200(slab|node=0|zone=1) [ 48.539018] page_type: 0xffffffff() [ 48.539579] raw: 0100000000000200 ffff88800879fc80 ffffea00006a0840 dead000000000004 [ 48.540521] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018f71d01 [ 48.541437] page dumped because: kasan: bad access detected [ 48.542121] [ 48.542334] Memory state around the buggy address: [ 48.542935] ffff88801a819000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 48.543811] ffff88801a819080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 48.544677] >ffff88801a819100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 48.545532] ^ [ 48.546196] ffff88801a819180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 48.547084] ffff88801a819200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 48.547940] ================================================================== [ 48.549026] Disabling lock debugging due to kernel taint [ 50.838871] BUG: Bad rss-counter state mm:00000000c9f580fd type:MM_FILEPAGES val:33 [ 50.840095] BUG: Bad rss-counter state mm:00000000c9f580fd type:MM_ANONPAGES val:22 [ 51.390256] BUG: Bad rss-counter state mm:00000000cfb6e147 type:MM_FILEPAGES val:33 [ 51.391578] BUG: Bad rss-counter state mm:00000000cfb6e147 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40462' (ECDSA) to the list of known hosts. 2023/06/20 01:31:02 fuzzer started 2023/06/20 01:31:02 dialing manager at localhost:44161 2023/06/20 01:31:02 checking machine... 2023/06/20 01:31:02 checking revisions... [ 52.058638] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:31:02 testing simple program... [ 52.101483] cgroup: Unknown subsys name 'net' [ 52.144095] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:30:45 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff813ad420 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff85d3bed0 RBP=ffff8880147f75e0 RSP=ffff8880147f7548 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff8880147f7610 R13=0000000000000000 R14=ffff8880147f8000 R15=ffff88800d39ae00 RIP=ffffffff810bd082 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 00007f87c74a1900 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=000056394dccc768 CR3=000000000d8e8000 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=ffc395ecaae533a9cd4274a076eb4260 XMM02=ec2efd57dc4c00df000000000011e7c8 XMM03=8e7d9a4a295d0566000000000011e898 XMM04=c79b94b28df2b0a500000000000ae988 XMM05=4dd5d8e3a924d7cf0000000000137720 XMM06=19e9129bd510f2350000000000136868 XMM07=fb795ef6d65770560000000000125a20 XMM08=2c67c8bc2e329bc3000000000011e838 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007ffc281e8c48 CR3=00000000095f6000 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=2032303a31333a3130203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a31333a3130203032 XMM08=00007f3a940171700000007700000080 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000