syzkaller login: [ 42.161612] BUG: Bad rss-counter state mm:00000000c6707cd0 type:MM_FILEPAGES val:33 [ 42.162817] BUG: Bad rss-counter state mm:00000000c6707cd0 type:MM_ANONPAGES val:22 [ 42.254445] ================================================================== [ 42.255374] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.256308] Read of size 8 at addr ffff88800c642b38 by task sshd/220 [ 42.257084] [ 42.257306] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.258274] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.259273] Call Trace: [ 42.259602] [ 42.259891] dump_stack_lvl+0x91/0xf0 [ 42.260383] print_report+0xcc/0x620 [ 42.260862] ? __virt_addr_valid+0x102/0x340 [ 42.261415] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.262035] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.262665] kasan_report+0xbe/0xf0 [ 42.263158] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.263775] vma_interval_tree_remove+0xc75/0xec0 [ 42.264375] vma_prepare+0xc54/0x11a0 [ 42.264861] __split_vma+0x5af/0x950 [ 42.265341] ? __pfx___split_vma+0x10/0x10 [ 42.265865] ? find_held_lock+0x2c/0x110 [ 42.266388] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.266959] ? lock_is_held_type+0x9f/0x120 [ 42.267510] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.268127] ? mtree_range_walk+0x632/0x900 [ 42.268679] ? mas_walk+0x5c7/0x7c0 [ 42.269155] do_vmi_munmap+0x1f1/0x2b0 [ 42.269651] mmap_region+0x1f9/0x2660 [ 42.270134] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.270648] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.271392] ? __pfx_lock_acquire+0x10/0x10 [ 42.271921] ? __pfx_mmap_region+0x10/0x10 [ 42.272456] ? security_mmap_addr+0x7d/0xa0 [ 42.272987] ? get_unmapped_area+0x1f5/0x3f0 [ 42.273537] do_mmap+0x854/0xf00 [ 42.273973] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.274466] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.275036] ksys_mmap_pgoff+0x3af/0x500 [ 42.275553] do_syscall_64+0x3f/0x90 [ 42.276027] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.276669] RIP: 0033:0x7f0f45333d82 [ 42.277126] 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 [ 42.279264] RSP: 002b:00007ffc01057608 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.280171] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0f45333d82 [ 42.281014] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0f4476d000 [ 42.281864] RBP: 00007f0f4476d000 R08: 0000000000000009 R09: 0000000000001000 [ 42.282700] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bc97867ec0 [ 42.283564] R13: 00007ffc01057620 R14: 00007ffc01057650 R15: 00007ffc010579b0 [ 42.284421] [ 42.284711] [ 42.284925] Allocated by task 213: [ 42.285353] kasan_save_stack+0x22/0x50 [ 42.285862] kasan_set_track+0x25/0x30 [ 42.286361] __kasan_slab_alloc+0x59/0x70 [ 42.286880] kmem_cache_alloc+0x16b/0x370 [ 42.287415] vm_area_dup+0x20/0x160 [ 42.287873] __split_vma+0x170/0x950 [ 42.288344] split_vma+0xc6/0x110 [ 42.288794] mprotect_fixup+0x8d2/0xb30 [ 42.289294] do_mprotect_pkey+0x87e/0xd40 [ 42.289820] __x64_sys_mprotect+0x78/0xc0 [ 42.290337] do_syscall_64+0x3f/0x90 [ 42.290808] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.291461] [ 42.291679] Freed by task 213: [ 42.292067] kasan_save_stack+0x22/0x50 [ 42.292576] kasan_set_track+0x25/0x30 [ 42.293069] kasan_save_free_info+0x2b/0x50 [ 42.293601] __kasan_slab_free+0x10a/0x190 [ 42.294132] kmem_cache_free+0x10d/0x4d0 [ 42.294637] rcu_core+0x8c8/0x2860 [ 42.295104] __do_softirq+0x1b7/0x7d4 [ 42.295583] [ 42.295796] Last potentially related work creation: [ 42.296384] kasan_save_stack+0x22/0x50 [ 42.296893] __kasan_record_aux_stack+0x8e/0xa0 [ 42.297473] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.298121] remove_vma+0x139/0x170 [ 42.298575] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.299138] do_vmi_munmap+0x1f1/0x2b0 [ 42.299627] __vm_munmap+0x138/0x3a0 [ 42.300091] __x64_sys_munmap+0x59/0x80 [ 42.300591] do_syscall_64+0x3f/0x90 [ 42.301065] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.301705] [ 42.301918] Second to last potentially related work creation: [ 42.302600] kasan_save_stack+0x22/0x50 [ 42.303111] __kasan_record_aux_stack+0x8e/0xa0 [ 42.303682] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.304320] remove_vma+0x139/0x170 [ 42.304767] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.305324] do_vmi_munmap+0x1f1/0x2b0 [ 42.305804] mmap_region+0x1f9/0x2660 [ 42.306277] do_mmap+0x854/0xf00 [ 42.306708] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.307217] ksys_mmap_pgoff+0x3af/0x500 [ 42.307717] do_syscall_64+0x3f/0x90 [ 42.308190] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.308834] [ 42.309050] The buggy address belongs to the object at ffff88800c642ae0 [ 42.309050] which belongs to the cache vm_area_struct of size 168 [ 42.310518] The buggy address is located 88 bytes inside of [ 42.310518] freed 168-byte region [ffff88800c642ae0, ffff88800c642b88) [ 42.311917] [ 42.312133] The buggy address belongs to the physical page: [ 42.312794] page:000000000cb1752c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc642 [ 42.313869] memcg:ffff88800e134801 [ 42.314297] flags: 0x100000000000200(slab|node=0|zone=1) [ 42.314966] page_type: 0xffffffff() [ 42.315419] raw: 0100000000000200 ffff88800879fc80 ffffea00003b0a80 dead000000000002 [ 42.316333] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e134801 [ 42.317237] page dumped because: kasan: bad access detected [ 42.317890] [ 42.318109] Memory state around the buggy address: [ 42.318685] ffff88800c642a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 42.319571] ffff88800c642a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 42.320454] >ffff88800c642b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.321308] ^ [ 42.321914] ffff88800c642b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 42.322768] ffff88800c642c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 42.323620] ================================================================== [ 42.324744] Disabling lock debugging due to kernel taint [ 44.157398] BUG: Bad rss-counter state mm:000000009dc902bf type:MM_FILEPAGES val:33 [ 44.158582] BUG: Bad rss-counter state mm:000000009dc902bf type:MM_ANONPAGES val:22 [ 44.655106] BUG: Bad rss-counter state mm:000000000ab22358 type:MM_FILEPAGES val:33 [ 44.656821] BUG: Bad rss-counter state mm:000000000ab22358 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60463' (ECDSA) to the list of known hosts. 2023/06/19 21:35:45 fuzzer started 2023/06/19 21:35:45 dialing manager at localhost:44161 2023/06/19 21:35:45 checking machine... 2023/06/19 21:35:45 checking revisions... [ 45.385940] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:35:45 testing simple program... [ 45.432423] cgroup: Unknown subsys name 'net' [ 45.490507] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:35:41 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888014097be0 RCX=ffffffff812e00e5 RDX=1ffff11001089d22 RSI=0000000000000004 RDI=ffff888016707b70 RBP=ffff88800844e900 RSP=ffff888016707bc8 R8 =0000000000000001 R9 =ffffed1002ce0f6e R10=0000000000000003 R11=00000000000d000c R12=0000000000000246 R13=ffff88800844e910 R14=0000000000000000 R15=ffff888014097980 RIP=ffffffff812e0189 RFL=00000092 [--S-A--] 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 00007fb694bad900 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=000055ca5e898954 CR3=000000000fbd4000 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=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 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=0000000000000001 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=00007f35dddda0d0 CR3=00000000099aa000 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=6b556f7531469db459459dd027cb3209 XMM02=000000000011e490ec2efd57dc4c00df XMM03=00000000001246b87f62ab809434a7b4 XMM04=5760176850ab7ba800000000000ae988 XMM05=697e490135791aca00000000001364e8 XMM06=4fda316b135da52b00000000001351c8 XMM07=e042d86d42eb936e0000000000124990 XMM08=7f62ab809434a7b4000000000011e4f0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000