syzkaller login: [ 31.044266] BUG: Bad rss-counter state mm:00000000f5d0bd9f type:MM_FILEPAGES val:33 [ 31.046018] BUG: Bad rss-counter state mm:00000000f5d0bd9f type:MM_ANONPAGES val:22 [ 31.213654] ================================================================== [ 31.214770] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.215955] Read of size 8 at addr ffff88800c6abdf0 by task sshd/221 [ 31.216915] [ 31.217144] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.218026] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.219058] Call Trace: [ 31.219393] [ 31.219685] dump_stack_lvl+0x91/0xf0 [ 31.220182] print_report+0xcc/0x620 [ 31.220670] ? __virt_addr_valid+0x102/0x340 [ 31.221221] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.221840] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.222456] kasan_report+0xbe/0xf0 [ 31.222933] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.223561] vma_interval_tree_remove+0xc75/0xec0 [ 31.224168] vma_prepare+0xc54/0x11a0 [ 31.224646] __split_vma+0x5af/0x950 [ 31.225123] ? __pfx___split_vma+0x10/0x10 [ 31.225663] ? find_held_lock+0x2c/0x110 [ 31.226182] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.226751] ? lock_is_held_type+0x9f/0x120 [ 31.227324] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.227935] ? mtree_range_walk+0x632/0x900 [ 31.228502] ? mas_walk+0x5c7/0x7c0 [ 31.228981] do_vmi_munmap+0x1f1/0x2b0 [ 31.229483] mmap_region+0x1f9/0x2660 [ 31.229972] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.230484] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.231219] ? __pfx_lock_acquire+0x10/0x10 [ 31.231752] ? __pfx_mmap_region+0x10/0x10 [ 31.232289] ? security_mmap_addr+0x7d/0xa0 [ 31.232819] ? get_unmapped_area+0x1f5/0x3f0 [ 31.233372] do_mmap+0x854/0xf00 [ 31.233814] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.234317] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.234883] ksys_mmap_pgoff+0x3af/0x500 [ 31.235405] do_syscall_64+0x3f/0x90 [ 31.235890] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.236545] RIP: 0033:0x7f0eb26fbd82 [ 31.237008] 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 [ 31.239151] RSP: 002b:00007ffca8358398 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.240061] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0eb26fbd82 [ 31.240920] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0eb1b35000 [ 31.241779] RBP: 00007f0eb1b35000 R08: 0000000000000009 R09: 0000000000001000 [ 31.242641] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562b3b8d3ec0 [ 31.243504] R13: 00007ffca83583b0 R14: 00007ffca83583e0 R15: 00007ffca8358740 [ 31.244378] [ 31.244671] [ 31.244891] Allocated by task 214: [ 31.245322] kasan_save_stack+0x22/0x50 [ 31.245826] kasan_set_track+0x25/0x30 [ 31.246323] __kasan_slab_alloc+0x59/0x70 [ 31.246854] kmem_cache_alloc+0x16b/0x370 [ 31.247400] vm_area_dup+0x20/0x160 [ 31.247860] __split_vma+0x170/0x950 [ 31.248329] split_vma+0xc6/0x110 [ 31.248769] mprotect_fixup+0x8d2/0xb30 [ 31.249279] do_mprotect_pkey+0x87e/0xd40 [ 31.249811] __x64_sys_mprotect+0x78/0xc0 [ 31.250341] do_syscall_64+0x3f/0x90 [ 31.250819] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.251486] [ 31.251710] Freed by task 214: [ 31.252105] kasan_save_stack+0x22/0x50 [ 31.252618] kasan_set_track+0x25/0x30 [ 31.253146] kasan_save_free_info+0x2b/0x50 [ 31.253667] __kasan_slab_free+0x10a/0x190 [ 31.254199] kmem_cache_free+0x10d/0x4d0 [ 31.254721] rcu_core+0x8c8/0x2860 [ 31.255184] __do_softirq+0x1b7/0x7d4 [ 31.255684] [ 31.255906] Last potentially related work creation: [ 31.256505] kasan_save_stack+0x22/0x50 [ 31.257020] __kasan_record_aux_stack+0x8e/0xa0 [ 31.257691] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.258351] remove_vma+0x139/0x170 [ 31.258810] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.259391] do_vmi_munmap+0x1f1/0x2b0 [ 31.259895] __vm_munmap+0x138/0x3a0 [ 31.260382] __x64_sys_munmap+0x59/0x80 [ 31.260894] do_syscall_64+0x3f/0x90 [ 31.261385] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.262035] [ 31.262260] The buggy address belongs to the object at ffff88800c6abd98 [ 31.262260] which belongs to the cache vm_area_struct of size 168 [ 31.263819] The buggy address is located 88 bytes inside of [ 31.263819] freed 168-byte region [ffff88800c6abd98, ffff88800c6abe40) [ 31.265257] [ 31.265477] The buggy address belongs to the physical page: [ 31.266149] page:00000000a7f8fa8d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc6ab [ 31.267268] memcg:ffff888018386501 [ 31.267701] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.268355] page_type: 0xffffffff() [ 31.268812] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.269740] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018386501 [ 31.270657] page dumped because: kasan: bad access detected [ 31.271360] [ 31.271580] Memory state around the buggy address: [ 31.272169] ffff88800c6abc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.273087] ffff88800c6abd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.273950] >ffff88800c6abd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.274813] ^ [ 31.275697] ffff88800c6abe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.276557] ffff88800c6abe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.277409] ================================================================== [ 31.278371] Disabling lock debugging due to kernel taint [ 33.190134] BUG: Bad rss-counter state mm:0000000081862e8f type:MM_FILEPAGES val:33 [ 33.191626] BUG: Bad rss-counter state mm:0000000081862e8f type:MM_ANONPAGES val:22 [ 33.743017] BUG: Bad rss-counter state mm:00000000fb47480a type:MM_FILEPAGES val:33 [ 33.744217] BUG: Bad rss-counter state mm:00000000fb47480a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63256' (ECDSA) to the list of known hosts. 2023/06/20 13:41:27 fuzzer started 2023/06/20 13:41:28 dialing manager at localhost:36067 2023/06/20 13:41:28 checking machine... 2023/06/20 13:41:28 checking revisions... [ 34.359697] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:41:28 testing simple program... [ 34.406612] cgroup: Unknown subsys name 'net' [ 34.443635] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:41:27 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007f46e606cde0 CR3=000000000d7a8000 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=2037323a31343a3331203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a31343a3331203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff81846194 RBX=ffffffff813ad470 RCX=ffffffff860d8201 RDX=1ffff11003930e36 RSI=ffffffff81846194 RDI=ffff88801c987220 RBP=ffff88801c9871f0 RSP=ffff88801c987150 R8 =ffffffff860d825a R9 =ffff88801c987198 R10=0000000000038001 R11=0000000000010b8d R12=ffff88801c987220 R13=0000000000000000 R14=ffff88800f189b40 R15=ffff8880090745f0 RIP=ffffffff813ad470 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 00007f9840fbb900 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=00007f9840f9a020 CR3=0000000009a66000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000