syzkaller login: [ 31.079651] BUG: Bad rss-counter state mm:0000000081cad3fb type:MM_FILEPAGES val:33 [ 31.080715] BUG: Bad rss-counter state mm:0000000081cad3fb type:MM_ANONPAGES val:22 [ 31.215617] ================================================================== [ 31.216505] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.217164] Read of size 8 at addr ffff88800f116140 by task sshd/220 [ 31.217699] [ 31.217926] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.218570] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.219250] Call Trace: [ 31.219477] [ 31.219677] dump_stack_lvl+0x91/0xf0 [ 31.220038] print_report+0xcc/0x620 [ 31.220397] ? __virt_addr_valid+0x102/0x340 [ 31.220787] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.221220] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.221653] kasan_report+0xbe/0xf0 [ 31.221991] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.222426] vma_interval_tree_remove+0xc75/0xec0 [ 31.222849] vma_prepare+0xc54/0x11a0 [ 31.223184] __split_vma+0x5af/0x950 [ 31.223522] ? __pfx___split_vma+0x10/0x10 [ 31.223892] ? find_held_lock+0x2c/0x110 [ 31.224277] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.224672] ? lock_is_held_type+0x9f/0x120 [ 31.225050] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.225477] ? mtree_range_walk+0x632/0x900 [ 31.225868] ? mas_walk+0x5c7/0x7c0 [ 31.226205] do_vmi_munmap+0x1f1/0x2b0 [ 31.226557] mmap_region+0x1f9/0x2660 [ 31.226896] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.227256] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.227758] ? __pfx_lock_acquire+0x10/0x10 [ 31.228140] ? __pfx_mmap_region+0x10/0x10 [ 31.228513] ? security_mmap_addr+0x7d/0xa0 [ 31.228887] ? get_unmapped_area+0x1f5/0x3f0 [ 31.229273] do_mmap+0x854/0xf00 [ 31.229584] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.229934] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.230339] ksys_mmap_pgoff+0x3af/0x500 [ 31.230697] do_syscall_64+0x3f/0x90 [ 31.231034] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.231490] RIP: 0033:0x7f10017fad82 [ 31.231813] 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 [ 31.233314] RSP: 002b:00007ffe99ffa008 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.233947] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f10017fad82 [ 31.234546] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1000c34000 [ 31.235138] RBP: 00007f1000c34000 R08: 0000000000000009 R09: 0000000000001000 [ 31.235742] R10: 0000000000000812 R11: 0000000000000206 R12: 00005627fe153f70 [ 31.236353] R13: 00007ffe99ffa020 R14: 00007ffe99ffa050 R15: 00007ffe99ffa3b0 [ 31.236954] [ 31.237161] [ 31.237314] Allocated by task 213: [ 31.237614] kasan_save_stack+0x22/0x50 [ 31.237968] kasan_set_track+0x25/0x30 [ 31.238316] __kasan_slab_alloc+0x59/0x70 [ 31.238685] kmem_cache_alloc+0x16b/0x370 [ 31.239049] vm_area_dup+0x20/0x160 [ 31.239375] __split_vma+0x170/0x950 [ 31.239706] split_vma+0xc6/0x110 [ 31.240025] mprotect_fixup+0x8d2/0xb30 [ 31.240377] do_mprotect_pkey+0x87e/0xd40 [ 31.240745] __x64_sys_mprotect+0x78/0xc0 [ 31.241110] do_syscall_64+0x3f/0x90 [ 31.241445] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.241900] [ 31.242053] Freed by task 213: [ 31.242331] kasan_save_stack+0x22/0x50 [ 31.242689] kasan_set_track+0x25/0x30 [ 31.243039] kasan_save_free_info+0x2b/0x50 [ 31.243412] __kasan_slab_free+0x10a/0x190 [ 31.243787] kmem_cache_free+0x10d/0x4d0 [ 31.244149] rcu_core+0x8c8/0x2860 [ 31.244460] __do_softirq+0x1b7/0x7d4 [ 31.244795] [ 31.244947] Last potentially related work creation: [ 31.245359] kasan_save_stack+0x22/0x50 [ 31.245713] __kasan_record_aux_stack+0x8e/0xa0 [ 31.246122] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.246570] remove_vma+0x139/0x170 [ 31.246887] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.247279] do_vmi_munmap+0x1f1/0x2b0 [ 31.247619] __vm_munmap+0x138/0x3a0 [ 31.247967] __x64_sys_munmap+0x59/0x80 [ 31.248317] do_syscall_64+0x3f/0x90 [ 31.248654] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.249103] [ 31.249261] The buggy address belongs to the object at ffff88800f1160e8 [ 31.249261] which belongs to the cache vm_area_struct of size 168 [ 31.250282] The buggy address is located 88 bytes inside of [ 31.250282] freed 168-byte region [ffff88800f1160e8, ffff88800f116190) [ 31.251260] [ 31.251413] The buggy address belongs to the physical page: [ 31.251876] page:0000000052846b01 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf116 [ 31.252635] memcg:ffff88800c52ef01 [ 31.252936] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.253390] page_type: 0xffffffff() [ 31.253705] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.254349] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c52ef01 [ 31.254975] page dumped because: kasan: bad access detected [ 31.255440] [ 31.255596] Memory state around the buggy address: [ 31.256013] ffff88800f116000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.256615] ffff88800f116080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.257216] >ffff88800f116100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.257812] ^ [ 31.258254] ffff88800f116180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.258901] ffff88800f116200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.259495] ================================================================== [ 31.260158] Disabling lock debugging due to kernel taint [ 33.422547] BUG: Bad rss-counter state mm:0000000029682fca type:MM_FILEPAGES val:33 [ 33.423705] BUG: Bad rss-counter state mm:0000000029682fca type:MM_ANONPAGES val:22 [ 33.820308] BUG: Bad rss-counter state mm:00000000807e69fa type:MM_FILEPAGES val:33 [ 33.821298] BUG: Bad rss-counter state mm:00000000807e69fa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44721' (ECDSA) to the list of known hosts. 2023/06/20 15:05:22 fuzzer started 2023/06/20 15:05:23 dialing manager at localhost:36067 2023/06/20 15:05:23 checking machine... 2023/06/20 15:05:23 checking revisions... [ 34.533418] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:05:23 testing simple program... [ 34.586358] cgroup: Unknown subsys name 'net' [ 34.635749] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:05:22 Registers: info registers vcpu 0 RAX=ffffffff846000aa RBX=000000000000000b RCX=0000000000000001 RDX=0000000000000800 RSI=000000000000000c RDI=ffff88800f6afb50 RBP=dffffc0000000000 RSP=ffff88800f6afa48 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=000000000000000c R13=0000000000000800 R14=ffff88800f6afaf8 R15=ffff88800c5ad850 RIP=ffffffff813ad651 RFL=00000202 [-------] 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 00007f02c13f8900 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=00007f02c19b00b0 CR3=00000000094c2000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88801ba03910 RCX=ffffffff8196d3e0 RDX=ffff88801030b680 RSI=0000000000000000 RDI=0000000000000001 RBP=0000000000001000 RSP=ffff88800da47b78 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6d53 R12=0000000000000000 R13=dffffc0000000000 R14=0000000000000001 R15=0000000000000000 RIP=ffffffff814c0860 RFL=00000202 [-------] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f1cc6843900 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=00007f1cc5d62000 CR3=000000000f3b0000 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=00000000000aead06b1e99b806172e3b XMM01=00000000000f6d5080f09f19808d26a3 XMM02=00000000000f70902e86c1e8fc577532 XMM03=00000000000f9808ac585006bc0bee6f XMM04=90422ed2fb37290d00000000000ae988 XMM05=19e9129bd510f2350000000000132a78 XMM06=4fda316b135da52b0000000000132900 XMM07=e042d86d42eb936e0000000000122e20 XMM08=461129dacd41395f000000000011bf30 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000