syzkaller login: [ 30.798259] BUG: Bad rss-counter state mm:00000000ea227510 type:MM_FILEPAGES val:33 [ 30.799523] BUG: Bad rss-counter state mm:00000000ea227510 type:MM_ANONPAGES val:22 [ 30.842134] ================================================================== [ 30.843168] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.844247] Read of size 8 at addr ffff88800cda5ed8 by task sshd/222 [ 30.845155] [ 30.845424] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.846397] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.847538] Call Trace: [ 30.847895] [ 30.848223] dump_stack_lvl+0x91/0xf0 [ 30.848792] print_report+0xcc/0x620 [ 30.849343] ? __virt_addr_valid+0x102/0x340 [ 30.849979] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.850673] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.851323] kasan_report+0xbe/0xf0 [ 30.851924] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.852559] vma_interval_tree_remove+0xc75/0xec0 [ 30.853157] vma_prepare+0xc54/0x11a0 [ 30.853634] __split_vma+0x5af/0x950 [ 30.854111] ? __pfx___split_vma+0x10/0x10 [ 30.854647] ? find_held_lock+0x2c/0x110 [ 30.855321] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.855953] ? lock_is_held_type+0x9f/0x120 [ 30.856499] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.857185] ? mtree_range_walk+0x632/0x900 [ 30.857844] ? mas_walk+0x5c7/0x7c0 [ 30.858394] do_vmi_munmap+0x1f1/0x2b0 [ 30.858913] mmap_region+0x1f9/0x2660 [ 30.859475] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.859992] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.860780] ? __pfx_lock_acquire+0x10/0x10 [ 30.861407] ? __pfx_mmap_region+0x10/0x10 [ 30.862071] ? security_mmap_addr+0x7d/0xa0 [ 30.862617] ? get_unmapped_area+0x1f5/0x3f0 [ 30.863195] do_mmap+0x854/0xf00 [ 30.863638] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.864144] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.864707] ksys_mmap_pgoff+0x3af/0x500 [ 30.865225] do_syscall_64+0x3f/0x90 [ 30.865704] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.866369] RIP: 0033:0x7fe179994d82 [ 30.866841] 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 [ 30.868992] RSP: 002b:00007fff3592a338 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.869908] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe179994d82 [ 30.870773] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe178dce000 [ 30.871633] RBP: 00007fe178dce000 R08: 0000000000000009 R09: 0000000000001000 [ 30.872495] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562b79f1fec0 [ 30.873356] R13: 00007fff3592a350 R14: 00007fff3592a380 R15: 00007fff3592a6e0 [ 30.874226] [ 30.874519] [ 30.874733] Allocated by task 215: [ 30.875174] kasan_save_stack+0x22/0x50 [ 30.875672] kasan_set_track+0x25/0x30 [ 30.876162] __kasan_slab_alloc+0x59/0x70 [ 30.876690] kmem_cache_alloc+0x16b/0x370 [ 30.877207] vm_area_dup+0x20/0x160 [ 30.877664] __split_vma+0x170/0x950 [ 30.878128] split_vma+0xc6/0x110 [ 30.878568] mprotect_fixup+0x8d2/0xb30 [ 30.879110] do_mprotect_pkey+0x87e/0xd40 [ 30.879638] __x64_sys_mprotect+0x78/0xc0 [ 30.880156] do_syscall_64+0x3f/0x90 [ 30.880634] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.881286] [ 30.881508] Freed by task 13: [ 30.881899] kasan_save_stack+0x22/0x50 [ 30.882404] kasan_set_track+0x25/0x30 [ 30.882899] kasan_save_free_info+0x2b/0x50 [ 30.883438] __kasan_slab_free+0x10a/0x190 [ 30.883977] kmem_cache_free+0x10d/0x4d0 [ 30.884490] rcu_core+0x8c8/0x2860 [ 30.884941] __do_softirq+0x1b7/0x7d4 [ 30.885415] [ 30.885700] Last potentially related work creation: [ 30.886316] kasan_save_stack+0x22/0x50 [ 30.886837] __kasan_record_aux_stack+0x8e/0xa0 [ 30.887417] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.888066] remove_vma+0x139/0x170 [ 30.888524] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.889080] do_vmi_munmap+0x1f1/0x2b0 [ 30.889562] __vm_munmap+0x138/0x3a0 [ 30.890037] __x64_sys_munmap+0x59/0x80 [ 30.890542] do_syscall_64+0x3f/0x90 [ 30.891035] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.891688] [ 30.891908] Second to last potentially related work creation: [ 30.892603] kasan_save_stack+0x22/0x50 [ 30.893114] __kasan_record_aux_stack+0x8e/0xa0 [ 30.893695] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.894335] remove_vma+0x139/0x170 [ 30.894788] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.895371] do_vmi_munmap+0x1f1/0x2b0 [ 30.895858] mmap_region+0x1f9/0x2660 [ 30.896330] do_mmap+0x854/0xf00 [ 30.896762] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.897250] ksys_mmap_pgoff+0x3af/0x500 [ 30.897757] do_syscall_64+0x3f/0x90 [ 30.898241] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.898887] [ 30.899101] The buggy address belongs to the object at ffff88800cda5e80 [ 30.899101] which belongs to the cache vm_area_struct of size 168 [ 30.900653] The buggy address is located 88 bytes inside of [ 30.900653] freed 168-byte region [ffff88800cda5e80, ffff88800cda5f28) [ 30.902071] [ 30.902292] The buggy address belongs to the physical page: [ 30.902975] page:00000000be5f75c8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcda5 [ 30.904066] memcg:ffff88800d298b01 [ 30.904506] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.905210] page_type: 0xffffffff() [ 30.905673] raw: 0100000000000200 ffff8880087a0c80 ffffea00003be280 dead000000000007 [ 30.906603] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d298b01 [ 30.907522] page dumped because: kasan: bad access detected [ 30.908190] [ 30.908405] Memory state around the buggy address: [ 30.908993] ffff88800cda5d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.909861] ffff88800cda5e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.910733] >ffff88800cda5e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.911615] ^ [ 30.912356] ffff88800cda5f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.913224] ffff88800cda5f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.914091] ================================================================== [ 30.915034] Disabling lock debugging due to kernel taint [ 33.016283] BUG: Bad rss-counter state mm:00000000b722258c type:MM_FILEPAGES val:33 [ 33.017595] BUG: Bad rss-counter state mm:00000000b722258c type:MM_ANONPAGES val:22 [ 33.418085] BUG: Bad rss-counter state mm:0000000031298043 type:MM_FILEPAGES val:33 [ 33.418850] BUG: Bad rss-counter state mm:0000000031298043 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61249' (ECDSA) to the list of known hosts. 2023/06/20 11:36:00 fuzzer started 2023/06/20 11:36:00 dialing manager at localhost:36067 2023/06/20 11:36:00 checking machine... 2023/06/20 11:36:00 checking revisions... [ 34.117206] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:36:00 testing simple program... [ 34.161401] cgroup: Unknown subsys name 'net' [ 34.202637] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:36:00 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff863b2e46 RDX=1ffff11001fc8eb2 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88800fe475a0 RSP=ffff88800fe474d8 R8 =ffffffff863b2e4a R9 =ffff88800fe47588 R10=0000000000038001 R11=000000000008a835 R12=ffff88800fe475a8 R13=ffff88800fe47590 R14=0000000000000005 R15=ffff88800fe47548 RIP=ffffffff81130b54 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 00007f469f963900 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=00007ffca6956000 CR3=0000000016cce000 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=563412feff00545000000000000080fe 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 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=00007f1ff6ace750 CR3=000000000d77a000 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=afc66574d79b58aebf4bc77d03b1f9a6 XMM02=000000000011a890ec2efd57dc4c00df XMM03=0000000000121f0855ad8b83958e5534 XMM04=f3bebc3dbae8062600000000000ae988 XMM05=59d5b690e0af863b0000000000133370 XMM06=3a790a4c62e52fba00000000001321d8 XMM07=e042d86d42eb936e0000000000122188 XMM08=55ad8b83958e5534000000000011a8f0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000