syzkaller login: [ 38.724805] sshd (220) used greatest stack depth: 23992 bytes left [ 38.726723] BUG: Bad rss-counter state mm:00000000e2fc647d type:MM_FILEPAGES val:33 [ 38.728414] BUG: Bad rss-counter state mm:00000000e2fc647d type:MM_ANONPAGES val:22 [ 38.883292] ================================================================== [ 38.884204] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.885134] Read of size 8 at addr ffff888016d0f140 by task sshd/227 [ 38.885987] [ 38.886268] CPU: 1 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.887128] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.888095] Call Trace: [ 38.888430] [ 38.888716] dump_stack_lvl+0x91/0xf0 [ 38.889202] print_report+0xcc/0x620 [ 38.889686] ? __virt_addr_valid+0x102/0x340 [ 38.890230] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.890847] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.891459] kasan_report+0xbe/0xf0 [ 38.891934] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.892551] vma_interval_tree_remove+0xc75/0xec0 [ 38.893154] vma_prepare+0xc54/0x11a0 [ 38.893629] __split_vma+0x5af/0x950 [ 38.894098] ? __pfx___split_vma+0x10/0x10 [ 38.894654] ? find_held_lock+0x2c/0x110 [ 38.895171] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.895734] ? lock_is_held_type+0x9f/0x120 [ 38.896270] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.896876] ? mtree_range_walk+0x632/0x900 [ 38.897426] ? mas_walk+0x5c7/0x7c0 [ 38.897904] do_vmi_munmap+0x1f1/0x2b0 [ 38.898406] mmap_region+0x1f9/0x2660 [ 38.898889] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.899399] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.900116] ? __pfx_lock_acquire+0x10/0x10 [ 38.900645] ? __pfx_mmap_region+0x10/0x10 [ 38.901173] ? security_mmap_addr+0x7d/0xa0 [ 38.901708] ? get_unmapped_area+0x1f5/0x3f0 [ 38.902253] do_mmap+0x854/0xf00 [ 38.902712] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.903201] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.903765] ksys_mmap_pgoff+0x3af/0x500 [ 38.904280] do_syscall_64+0x3f/0x90 [ 38.904767] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.905422] RIP: 0033:0x7f83c3b25d82 [ 38.905877] 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 [ 38.907989] RSP: 002b:00007ffddfe9a318 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.908892] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f83c3b25d82 [ 38.909745] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f83c2f5f000 [ 38.910599] RBP: 00007f83c2f5f000 R08: 0000000000000009 R09: 0000000000001000 [ 38.911451] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c56d9daec0 [ 38.912290] R13: 00007ffddfe9a330 R14: 00007ffddfe9a360 R15: 00007ffddfe9a6c0 [ 38.913141] [ 38.913435] [ 38.913651] Allocated by task 220: [ 38.914084] kasan_save_stack+0x22/0x50 [ 38.914605] kasan_set_track+0x25/0x30 [ 38.915100] __kasan_slab_alloc+0x59/0x70 [ 38.915626] kmem_cache_alloc+0x16b/0x370 [ 38.916142] vm_area_dup+0x20/0x160 [ 38.916597] __split_vma+0x170/0x950 [ 38.917072] split_vma+0xc6/0x110 [ 38.917522] mprotect_fixup+0x8d2/0xb30 [ 38.918042] do_mprotect_pkey+0x87e/0xd40 [ 38.918592] __x64_sys_mprotect+0x78/0xc0 [ 38.919139] do_syscall_64+0x3f/0x90 [ 38.919631] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.920295] [ 38.920521] Freed by task 220: [ 38.920932] kasan_save_stack+0x22/0x50 [ 38.921463] kasan_set_track+0x25/0x30 [ 38.921977] kasan_save_free_info+0x2b/0x50 [ 38.922552] __kasan_slab_free+0x10a/0x190 [ 38.923105] kmem_cache_free+0x10d/0x4d0 [ 38.923633] rcu_core+0x8c8/0x2860 [ 38.924094] __do_softirq+0x1b7/0x7d4 [ 38.924598] [ 38.924818] Last potentially related work creation: [ 38.925421] kasan_save_stack+0x22/0x50 [ 38.925936] __kasan_record_aux_stack+0x8e/0xa0 [ 38.926548] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.927223] remove_vma+0x139/0x170 [ 38.927692] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.928276] do_vmi_munmap+0x1f1/0x2b0 [ 38.928780] __vm_munmap+0x138/0x3a0 [ 38.929268] __x64_sys_munmap+0x59/0x80 [ 38.929786] do_syscall_64+0x3f/0x90 [ 38.930281] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.930979] [ 38.931197] The buggy address belongs to the object at ffff888016d0f0e8 [ 38.931197] which belongs to the cache vm_area_struct of size 168 [ 38.932731] The buggy address is located 88 bytes inside of [ 38.932731] freed 168-byte region [ffff888016d0f0e8, ffff888016d0f190) [ 38.934189] [ 38.934419] The buggy address belongs to the physical page: [ 38.935109] page:00000000a1839065 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16d0f [ 38.936244] memcg:ffff88800f14c201 [ 38.936685] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.937346] page_type: 0xffffffff() [ 38.937811] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.938769] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f14c201 [ 38.939722] page dumped because: kasan: bad access detected [ 38.940418] [ 38.940641] Memory state around the buggy address: [ 38.941239] ffff888016d0f000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.942137] ffff888016d0f080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 38.943038] >ffff888016d0f100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.943936] ^ [ 38.944602] ffff888016d0f180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 38.945493] ffff888016d0f200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.946386] ================================================================== [ 38.947562] Disabling lock debugging due to kernel taint [ 41.345421] BUG: Bad rss-counter state mm:00000000adf0f2c4 type:MM_FILEPAGES val:33 [ 41.346618] BUG: Bad rss-counter state mm:00000000adf0f2c4 type:MM_ANONPAGES val:22 [ 41.759372] BUG: Bad rss-counter state mm:000000008e78adc6 type:MM_FILEPAGES val:33 [ 41.760791] BUG: Bad rss-counter state mm:000000008e78adc6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52598' (ECDSA) to the list of known hosts. 2023/06/20 14:32:54 fuzzer started 2023/06/20 14:32:55 dialing manager at localhost:36067 2023/06/20 14:32:55 checking machine... 2023/06/20 14:32:55 checking revisions... [ 42.506258] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:32:55 testing simple program... [ 42.553847] cgroup: Unknown subsys name 'net' [ 42.593748] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:32:54 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffffffff8366a63c RDI=ffff88806ce09b60 RBP=ffff88806ce09b30 RSP=ffff88806ce09a90 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020c57 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff88800d0c3680 R15=ffff888015cd9080 RIP=ffffffff813ad47e RFL=00000286 [--S--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 00007fef232a8900 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=00007fef226e3c00 CR3=000000000f3b0000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=395a912e8624c17400000000000ae988 XMM05=0e71a03a6183618500000000001328d0 XMM06=c4bf683b7927687f0000000000131300 XMM07=fb795ef6d65770560000000000121700 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888014350758 RCX=0000000000000000 RDX=1ffffffff09a5d97 RSI=ffffffff818c6619 RDI=ffffffff84d2ecb8 RBP=ffffffff84d2ec80 RSP=ffff888016737cf8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=ffff888014350830 R14=0000000000000000 R15=ffff8880143507c8 RIP=ffffffff814c0864 RFL=00000246 [---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 00007f95a5fd8900 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=00007ffdb74df000 CR3=000000000d51c000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000