syzkaller login: [ 31.499080] BUG: Bad rss-counter state mm:00000000a35695f1 type:MM_FILEPAGES val:33 [ 31.499817] BUG: Bad rss-counter state mm:00000000a35695f1 type:MM_ANONPAGES val:22 [ 31.532603] ================================================================== [ 31.533350] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.533990] Read of size 8 at addr ffff88800d660a50 by task sshd/220 [ 31.534517] [ 31.534662] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.535239] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.535885] Call Trace: [ 31.536100] [ 31.536305] dump_stack_lvl+0x91/0xf0 [ 31.536649] print_report+0xcc/0x620 [ 31.536987] ? __virt_addr_valid+0x102/0x340 [ 31.537395] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.537819] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.538248] kasan_report+0xbe/0xf0 [ 31.538580] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.539010] vma_interval_tree_remove+0xc75/0xec0 [ 31.539435] vma_prepare+0xc54/0x11a0 [ 31.539759] __split_vma+0x5af/0x950 [ 31.540084] ? __pfx___split_vma+0x10/0x10 [ 31.540452] ? find_held_lock+0x2c/0x110 [ 31.540799] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.541226] ? lock_is_held_type+0x9f/0x120 [ 31.541604] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.542021] ? mtree_range_walk+0x632/0x900 [ 31.542399] ? mas_walk+0x5c7/0x7c0 [ 31.542726] do_vmi_munmap+0x1f1/0x2b0 [ 31.543069] mmap_region+0x1f9/0x2660 [ 31.543402] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.543751] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.544239] ? __pfx_lock_acquire+0x10/0x10 [ 31.544603] ? __pfx_mmap_region+0x10/0x10 [ 31.544967] ? security_mmap_addr+0x7d/0xa0 [ 31.545394] ? get_unmapped_area+0x1f5/0x3f0 [ 31.545776] do_mmap+0x854/0xf00 [ 31.546090] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.546436] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.546812] ksys_mmap_pgoff+0x3af/0x500 [ 31.547152] do_syscall_64+0x3f/0x90 [ 31.547485] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.547933] RIP: 0033:0x7f6cca8a9d82 [ 31.548248] 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 [ 31.549726] RSP: 002b:00007ffe15331938 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.550351] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6cca8a9d82 [ 31.550931] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6cc9ce3000 [ 31.551526] RBP: 00007f6cc9ce3000 R08: 0000000000000009 R09: 0000000000001000 [ 31.552121] R10: 0000000000000812 R11: 0000000000000206 R12: 00005649a777aec0 [ 31.552689] R13: 00007ffe15331950 R14: 00007ffe15331980 R15: 00007ffe15331ce0 [ 31.553318] [ 31.553527] [ 31.553678] Allocated by task 213: [ 31.553975] kasan_save_stack+0x22/0x50 [ 31.554339] kasan_set_track+0x25/0x30 [ 31.554677] __kasan_slab_alloc+0x59/0x70 [ 31.555036] kmem_cache_alloc+0x16b/0x370 [ 31.555387] vm_area_dup+0x20/0x160 [ 31.555699] __split_vma+0x170/0x950 [ 31.556018] split_vma+0xc6/0x110 [ 31.556335] mprotect_fixup+0x8d2/0xb30 [ 31.556684] do_mprotect_pkey+0x87e/0xd40 [ 31.557046] __x64_sys_mprotect+0x78/0xc0 [ 31.557460] do_syscall_64+0x3f/0x90 [ 31.557800] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.558244] [ 31.558391] Freed by task 0: [ 31.558650] kasan_save_stack+0x22/0x50 [ 31.558993] kasan_set_track+0x25/0x30 [ 31.559339] kasan_save_free_info+0x2b/0x50 [ 31.559706] __kasan_slab_free+0x10a/0x190 [ 31.560071] kmem_cache_free+0x10d/0x4d0 [ 31.560425] rcu_core+0x8c8/0x2860 [ 31.560740] __do_softirq+0x1b7/0x7d4 [ 31.561095] [ 31.561247] Last potentially related work creation: [ 31.561633] kasan_save_stack+0x22/0x50 [ 31.561973] __kasan_record_aux_stack+0x8e/0xa0 [ 31.562359] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.562803] remove_vma+0x139/0x170 [ 31.563115] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.563501] do_vmi_munmap+0x1f1/0x2b0 [ 31.563837] __vm_munmap+0x138/0x3a0 [ 31.564157] __x64_sys_munmap+0x59/0x80 [ 31.564496] do_syscall_64+0x3f/0x90 [ 31.564820] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.565315] [ 31.565463] The buggy address belongs to the object at ffff88800d6609f8 [ 31.565463] which belongs to the cache vm_area_struct of size 168 [ 31.566464] The buggy address is located 88 bytes inside of [ 31.566464] freed 168-byte region [ffff88800d6609f8, ffff88800d660aa0) [ 31.567424] [ 31.567576] The buggy address belongs to the physical page: [ 31.568033] page:0000000035299648 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd660 [ 31.568761] memcg:ffff88800eab3401 [ 31.569062] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.569544] page_type: 0xffffffff() [ 31.569857] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.570482] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eab3401 [ 31.571116] page dumped because: kasan: bad access detected [ 31.571569] [ 31.571713] Memory state around the buggy address: [ 31.572104] ffff88800d660900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.572706] ffff88800d660980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.573346] >ffff88800d660a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.573929] ^ [ 31.574466] ffff88800d660a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.575045] ffff88800d660b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.575622] ================================================================== [ 31.576752] Disabling lock debugging due to kernel taint [ 33.169038] BUG: Bad rss-counter state mm:0000000027ace9b3 type:MM_FILEPAGES val:33 [ 33.169805] BUG: Bad rss-counter state mm:0000000027ace9b3 type:MM_ANONPAGES val:22 [ 33.606565] BUG: Bad rss-counter state mm:00000000e39f4494 type:MM_FILEPAGES val:33 [ 33.607220] BUG: Bad rss-counter state mm:00000000e39f4494 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29799' (ECDSA) to the list of known hosts. 2023/06/21 09:35:51 fuzzer started 2023/06/21 09:35:51 dialing manager at localhost:36067 2023/06/21 09:35:51 checking machine... 2023/06/21 09:35:51 checking revisions... [ 34.115061] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:35:51 testing simple program... [ 34.148099] cgroup: Unknown subsys name 'net' [ 34.180683] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:35:51 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff8604ebdc RCX=ffffffff8450cc7e RDX=0000000000000014 RSI=ffffffff864b2008 RDI=ffffffff8604ebc4 RBP=ffffffff8604ebe0 RSP=ffff888016a77640 R8 =ffffffff864b2008 R9 =ffff888016a77738 R10=0000000000038001 R11=00000000000b5080 R12=ffffffff8604ebf4 R13=ffffffff8604ebc4 R14=ffffffff8604ebdc R15=dffffc0000000000 RIP=ffffffff8112fc64 RFL=00000256 [---ZAP-] 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 00007fae75f9e900 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=00007fae765560b0 CR3=000000000e4fa000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000287 RBX=ffffffff87f24738 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff8880160d4bc0 RBP=ffff8880160d4bc0 RSP=ffff88806cf09dd8 R8 =0000000000000001 R9 =ffffed100d9e13af R10=0000000000000003 R11=ffff888008c04400 R12=0000000000000287 R13=ffffea0000583500 R14=ffffffff813782f8 R15=ffff88801651b980 RIP=ffffffff81846493 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=00007fcd6e416c20 CR3=000000000d780000 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=7f3396c5fe261ba60c4cc75b8d8aa65e XMM02=2c67c8bc2e329bc3000000000011a298 XMM03=fb795ef6d657705600000000001217d8 XMM04=7f5aa47c98b0cf8100000000000ae988 XMM05=19e9129bd510f2350000000000131648 XMM06=9c3e257b6c65e3fe00000000001304b0 XMM07=e042d86d42eb936e0000000000121a58 XMM08=cb79c8fa28d51f84000000000011a2f8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000