syzkaller login: [ 31.758581] BUG: Bad rss-counter state mm:000000008a0dfd4d type:MM_FILEPAGES val:33 [ 31.759360] BUG: Bad rss-counter state mm:000000008a0dfd4d type:MM_ANONPAGES val:22 [ 31.869079] ================================================================== [ 31.869792] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.870495] Read of size 8 at addr ffff888017973880 by task sshd/221 [ 31.871075] [ 31.871238] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.871889] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.872725] Call Trace: [ 31.872975] [ 31.873189] dump_stack_lvl+0x91/0xf0 [ 31.873561] print_report+0xcc/0x620 [ 31.873927] ? __virt_addr_valid+0x102/0x340 [ 31.874344] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.874817] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.875281] kasan_report+0xbe/0xf0 [ 31.875642] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.876123] vma_interval_tree_remove+0xc75/0xec0 [ 31.876597] vma_prepare+0xc54/0x11a0 [ 31.876968] __split_vma+0x5af/0x950 [ 31.877332] ? __pfx___split_vma+0x10/0x10 [ 31.877736] ? find_held_lock+0x2c/0x110 [ 31.878138] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.878571] ? lock_is_held_type+0x9f/0x120 [ 31.878997] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.879458] ? mtree_range_walk+0x632/0x900 [ 31.879878] ? mas_walk+0x5c7/0x7c0 [ 31.880244] do_vmi_munmap+0x1f1/0x2b0 [ 31.880626] mmap_region+0x1f9/0x2660 [ 31.880969] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.881332] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.881850] ? __pfx_lock_acquire+0x10/0x10 [ 31.882233] ? __pfx_mmap_region+0x10/0x10 [ 31.882625] ? security_mmap_addr+0x7d/0xa0 [ 31.883007] ? get_unmapped_area+0x1f5/0x3f0 [ 31.883439] do_mmap+0x854/0xf00 [ 31.883768] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.884125] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.884543] ksys_mmap_pgoff+0x3af/0x500 [ 31.884900] do_syscall_64+0x3f/0x90 [ 31.885239] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.885698] RIP: 0033:0x7f4803c8bd82 [ 31.886027] 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 [ 31.887548] RSP: 002b:00007ffc8194fb98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.888186] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4803c8bd82 [ 31.888804] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f48030c5000 [ 31.889405] RBP: 00007f48030c5000 R08: 0000000000000009 R09: 0000000000001000 [ 31.890008] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563e99d24ec0 [ 31.890606] R13: 00007ffc8194fbb0 R14: 00007ffc8194fbe0 R15: 00007ffc8194ff40 [ 31.891208] [ 31.891411] [ 31.891562] Allocated by task 214: [ 31.891864] kasan_save_stack+0x22/0x50 [ 31.892219] kasan_set_track+0x25/0x30 [ 31.892601] __kasan_slab_alloc+0x59/0x70 [ 31.892974] kmem_cache_alloc+0x16b/0x370 [ 31.893338] vm_area_dup+0x20/0x160 [ 31.893658] __split_vma+0x170/0x950 [ 31.893990] split_vma+0xc6/0x110 [ 31.894305] mprotect_fixup+0x8d2/0xb30 [ 31.894658] do_mprotect_pkey+0x87e/0xd40 [ 31.895027] __x64_sys_mprotect+0x78/0xc0 [ 31.895398] do_syscall_64+0x3f/0x90 [ 31.895735] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.896205] [ 31.896361] Freed by task 214: [ 31.896650] kasan_save_stack+0x22/0x50 [ 31.897008] kasan_set_track+0x25/0x30 [ 31.897358] kasan_save_free_info+0x2b/0x50 [ 31.897741] __kasan_slab_free+0x10a/0x190 [ 31.898131] kmem_cache_free+0x10d/0x4d0 [ 31.898488] rcu_core+0x8c8/0x2860 [ 31.898806] __do_softirq+0x1b7/0x7d4 [ 31.899146] [ 31.899299] Last potentially related work creation: [ 31.899715] kasan_save_stack+0x22/0x50 [ 31.900076] __kasan_record_aux_stack+0x8e/0xa0 [ 31.900491] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.900872] remove_vma+0x139/0x170 [ 31.901133] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.901455] do_vmi_munmap+0x1f1/0x2b0 [ 31.901736] __vm_munmap+0x138/0x3a0 [ 31.902007] __x64_sys_munmap+0x59/0x80 [ 31.902297] do_syscall_64+0x3f/0x90 [ 31.902570] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.902945] [ 31.903070] The buggy address belongs to the object at ffff888017973828 [ 31.903070] which belongs to the cache vm_area_struct of size 168 [ 31.903934] The buggy address is located 88 bytes inside of [ 31.903934] freed 168-byte region [ffff888017973828, ffff8880179738d0) [ 31.904771] [ 31.904904] The buggy address belongs to the physical page: [ 31.905292] page:00000000a5d35277 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17973 [ 31.905934] memcg:ffff88800fd10c01 [ 31.906183] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.906558] page_type: 0xffffffff() [ 31.906827] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.907372] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fd10c01 [ 31.907905] page dumped because: kasan: bad access detected [ 31.908290] [ 31.908423] Memory state around the buggy address: [ 31.908760] ffff888017973780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.909263] ffff888017973800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.909760] >ffff888017973880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.910252] ^ [ 31.910488] ffff888017973900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.910991] ffff888017973980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.911483] ================================================================== [ 31.912042] Disabling lock debugging due to kernel taint [ 33.658746] BUG: Bad rss-counter state mm:00000000faa37d3c type:MM_FILEPAGES val:33 [ 33.659813] BUG: Bad rss-counter state mm:00000000faa37d3c type:MM_ANONPAGES val:22 [ 34.222231] BUG: Bad rss-counter state mm:000000003242a8ef type:MM_FILEPAGES val:33 [ 34.223403] BUG: Bad rss-counter state mm:000000003242a8ef type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43628' (ECDSA) to the list of known hosts. 2023/06/21 01:30:21 fuzzer started 2023/06/21 01:30:21 dialing manager at localhost:36067 2023/06/21 01:30:21 checking machine... 2023/06/21 01:30:21 checking revisions... [ 34.859525] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:30:21 testing simple program... [ 34.919539] cgroup: Unknown subsys name 'net' [ 34.959918] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:30:21 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff110011b3f35 RSI=ffffffff8118d7d9 RDI=ffff888008d9fa18 RBP=ffff888008d9f9e8 RSP=ffff888008d9f940 R8 =0000000000000001 R9 =ffff888008d9f990 R10=0000000000038001 R11=00000000000b5d59 R12=ffff888008d9fa18 R13=0000000000000000 R14=ffff888008d90000 R15=ffff888019e02730 RIP=ffffffff813ad47f RFL=00000282 [--S----] 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=00007f2a50ece0a0 CR3=000000000da16000 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=6c3c6f40e386dfb0264bc44b35eb08b1 XMM02=ec2efd57dc4c00df000000000011a088 XMM03=447f6e4e73dec014000000000011a158 XMM04=63f7c9dcb8e619ab00000000000ae988 XMM05=b4be4578ba9f945c0000000000131dc8 XMM06=c291bd5c70af25b900000000001317c0 XMM07=e042d86d42eb936e0000000000121cf8 XMM08=447f6e4e73dec014000000000011a158 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001de8769 RBX=ffff88800ef43b18 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800ef43b48 RBP=ffff8880194ead38 RSP=ffff888008e37cb8 R8 =0000000000000001 R9 =ffffed10011c6f8b R10=0000000000000003 R11=0000000000000128 R12=dffffc0000000000 R13=ffff8880194eebc0 R14=ffffffff813782f8 R15=ffff88800de35700 RIP=ffffffff818464ec RFL=00000046 [---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 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=00007fff4e6e6000 CR3=000000000ffc4000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000