syzkaller login: [ 61.258742] BUG: Bad rss-counter state mm:0000000077cdcb99 type:MM_FILEPAGES val:33 [ 61.259517] BUG: Bad rss-counter state mm:0000000077cdcb99 type:MM_ANONPAGES val:22 [ 61.391854] ================================================================== [ 61.392577] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.393306] Read of size 8 at addr ffff88800ccc6798 by task sshd/220 [ 61.393908] [ 61.394074] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.394748] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.395620] Call Trace: [ 61.395862] [ 61.396079] dump_stack_lvl+0x91/0xf0 [ 61.396462] print_report+0xcc/0x620 [ 61.396843] ? __virt_addr_valid+0x102/0x340 [ 61.397283] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.397784] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.398261] kasan_report+0xbe/0xf0 [ 61.398639] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.399119] vma_interval_tree_remove+0xc75/0xec0 [ 61.399595] vma_prepare+0xc54/0x11a0 [ 61.399964] __split_vma+0x5af/0x950 [ 61.400334] ? __pfx___split_vma+0x10/0x10 [ 61.400745] ? find_held_lock+0x2c/0x110 [ 61.401149] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.401591] ? lock_is_held_type+0x9f/0x120 [ 61.402014] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.402489] ? mtree_range_walk+0x632/0x900 [ 61.402922] ? mas_walk+0x5c7/0x7c0 [ 61.403292] do_vmi_munmap+0x1f1/0x2b0 [ 61.403685] mmap_region+0x1f9/0x2660 [ 61.404062] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.404456] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.405018] ? __pfx_lock_acquire+0x10/0x10 [ 61.405437] ? __pfx_mmap_region+0x10/0x10 [ 61.405846] ? security_mmap_addr+0x7d/0xa0 [ 61.406265] ? get_unmapped_area+0x1f5/0x3f0 [ 61.406704] do_mmap+0x854/0xf00 [ 61.407047] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.407431] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.407888] ksys_mmap_pgoff+0x3af/0x500 [ 61.408293] do_syscall_64+0x3f/0x90 [ 61.408667] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.409167] RIP: 0033:0x7fa1a1321d82 [ 61.409527] 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 [ 61.411227] RSP: 002b:00007ffce3200dc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.411943] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa1a1321d82 [ 61.412611] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa1a075b000 [ 61.413268] RBP: 00007fa1a075b000 R08: 0000000000000009 R09: 0000000000001000 [ 61.413919] R10: 0000000000000812 R11: 0000000000000206 R12: 00005575abeaaec0 [ 61.414576] R13: 00007ffce3200de0 R14: 00007ffce3200e10 R15: 00007ffce3201170 [ 61.415240] [ 61.415476] [ 61.415645] Allocated by task 213: [ 61.415983] kasan_save_stack+0x22/0x50 [ 61.416377] kasan_set_track+0x25/0x30 [ 61.416761] __kasan_slab_alloc+0x59/0x70 [ 61.417162] kmem_cache_alloc+0x16b/0x370 [ 61.417556] vm_area_dup+0x20/0x160 [ 61.417901] __split_vma+0x170/0x950 [ 61.418262] split_vma+0xc6/0x110 [ 61.418601] mprotect_fixup+0x8d2/0xb30 [ 61.418987] do_mprotect_pkey+0x87e/0xd40 [ 61.419390] __x64_sys_mprotect+0x78/0xc0 [ 61.419806] do_syscall_64+0x3f/0x90 [ 61.420177] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.420673] [ 61.420839] Freed by task 13: [ 61.421134] kasan_save_stack+0x22/0x50 [ 61.421522] kasan_set_track+0x25/0x30 [ 61.421898] kasan_save_free_info+0x2b/0x50 [ 61.422312] __kasan_slab_free+0x10a/0x190 [ 61.422731] kmem_cache_free+0x10d/0x4d0 [ 61.423119] rcu_core+0x8c8/0x2860 [ 61.423464] __do_softirq+0x1b7/0x7d4 [ 61.423830] [ 61.423998] Last potentially related work creation: [ 61.424449] kasan_save_stack+0x22/0x50 [ 61.424831] __kasan_record_aux_stack+0x8e/0xa0 [ 61.425272] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.425767] remove_vma+0x139/0x170 [ 61.426117] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.426544] do_vmi_munmap+0x1f1/0x2b0 [ 61.426918] __vm_munmap+0x138/0x3a0 [ 61.427277] __x64_sys_munmap+0x59/0x80 [ 61.427673] do_syscall_64+0x3f/0x90 [ 61.428034] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.428529] [ 61.428694] The buggy address belongs to the object at ffff88800ccc6740 [ 61.428694] which belongs to the cache vm_area_struct of size 168 [ 61.429834] The buggy address is located 88 bytes inside of [ 61.429834] freed 168-byte region [ffff88800ccc6740, ffff88800ccc67e8) [ 61.430927] [ 61.431093] The buggy address belongs to the physical page: [ 61.431620] page:000000001dacb98e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xccc6 [ 61.432461] memcg:ffff888016c86b01 [ 61.432791] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.433293] page_type: 0xffffffff() [ 61.433643] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 61.434348] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016c86b01 [ 61.435050] page dumped because: kasan: bad access detected [ 61.435568] [ 61.435736] Memory state around the buggy address: [ 61.436184] ffff88800ccc6680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 61.436845] ffff88800ccc6700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 61.437513] >ffff88800ccc6780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 61.438178] ^ [ 61.438562] ffff88800ccc6800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 61.439227] ffff88800ccc6880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 61.439904] ================================================================== [ 61.440706] Disabling lock debugging due to kernel taint [ 63.366048] BUG: Bad rss-counter state mm:000000003ac8e2bb type:MM_FILEPAGES val:33 [ 63.367189] BUG: Bad rss-counter state mm:000000003ac8e2bb type:MM_ANONPAGES val:22 [ 63.850029] BUG: Bad rss-counter state mm:00000000d31054f8 type:MM_FILEPAGES val:33 [ 63.851105] BUG: Bad rss-counter state mm:00000000d31054f8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52632' (ECDSA) to the list of known hosts. 2023/06/21 06:07:42 fuzzer started 2023/06/21 06:07:42 dialing manager at localhost:36067 2023/06/21 06:07:42 checking machine... 2023/06/21 06:07:42 checking revisions... [ 64.535653] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:07:42 testing simple program... [ 64.587698] cgroup: Unknown subsys name 'net' [ 64.654756] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:07:42 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff8540f200 RCX=ffffffff812731cb RDX=1ffffffff0a81e40 RSI=0000000000000008 RDI=ffff88806ce39ef0 RBP=ffff88806ce39fe0 RSP=ffff88806ce09d78 R8 =0000000000000000 R9 =fffffbfff0ba7a68 R10=ffffffff85d3d347 R11=0000000000000001 R12=ffff88806ce39f78 R13=00000000fffc63fe R14=ffff88800f287398 R15=ffff88806ce39500 RIP=ffffffff81273205 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 00007f0ef93b0900 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=00007f921def90d0 CR3=00000000102d0000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f0ef9965650 CR3=000000000d916000 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=2031343a37303a3630203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a37303a3630203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000