syzkaller login: [ 31.797207] BUG: Bad rss-counter state mm:00000000cafad68a type:MM_FILEPAGES val:33 [ 31.798386] BUG: Bad rss-counter state mm:00000000cafad68a type:MM_ANONPAGES val:22 [ 31.878669] ================================================================== [ 31.879551] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.880500] Read of size 8 at addr ffff88800e1ebc20 by task sshd/221 [ 31.881274] [ 31.881488] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.882461] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.883445] Call Trace: [ 31.883777] [ 31.884077] dump_stack_lvl+0x91/0xf0 [ 31.884577] print_report+0xcc/0x620 [ 31.885062] ? __virt_addr_valid+0x102/0x340 [ 31.885624] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.886248] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.886874] kasan_report+0xbe/0xf0 [ 31.887368] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.888004] vma_interval_tree_remove+0xc75/0xec0 [ 31.888601] vma_prepare+0xc54/0x11a0 [ 31.889082] __split_vma+0x5af/0x950 [ 31.889561] ? __pfx___split_vma+0x10/0x10 [ 31.890093] ? find_held_lock+0x2c/0x110 [ 31.890611] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.891180] ? lock_is_held_type+0x9f/0x120 [ 31.891732] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.892331] ? mtree_range_walk+0x632/0x900 [ 31.892876] ? mas_walk+0x5c7/0x7c0 [ 31.893347] do_vmi_munmap+0x1f1/0x2b0 [ 31.893834] mmap_region+0x1f9/0x2660 [ 31.894319] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.894831] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.895550] ? __pfx_lock_acquire+0x10/0x10 [ 31.896095] ? __pfx_mmap_region+0x10/0x10 [ 31.896625] ? security_mmap_addr+0x7d/0xa0 [ 31.897182] ? get_unmapped_area+0x1f5/0x3f0 [ 31.897747] do_mmap+0x854/0xf00 [ 31.898207] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.898714] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.899297] ksys_mmap_pgoff+0x3af/0x500 [ 31.899836] do_syscall_64+0x3f/0x90 [ 31.900337] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.901004] RIP: 0033:0x7fe67167bd82 [ 31.901484] 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 [ 31.903722] RSP: 002b:00007ffe388f3cb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.904664] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe67167bd82 [ 31.905554] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe670ab5000 [ 31.906439] RBP: 00007fe670ab5000 R08: 0000000000000009 R09: 0000000000001000 [ 31.907313] R10: 0000000000000812 R11: 0000000000000206 R12: 00005585a9340ec0 [ 31.908206] R13: 00007ffe388f3cd0 R14: 00007ffe388f3d00 R15: 00007ffe388f4060 [ 31.909107] [ 31.909413] [ 31.909634] Allocated by task 214: [ 31.910084] kasan_save_stack+0x22/0x50 [ 31.910604] kasan_set_track+0x25/0x30 [ 31.911115] __kasan_slab_alloc+0x59/0x70 [ 31.911654] kmem_cache_alloc+0x16b/0x370 [ 31.912213] vm_area_dup+0x20/0x160 [ 31.912684] __split_vma+0x170/0x950 [ 31.913169] split_vma+0xc6/0x110 [ 31.913627] mprotect_fixup+0x8d2/0xb30 [ 31.914152] do_mprotect_pkey+0x87e/0xd40 [ 31.914692] __x64_sys_mprotect+0x78/0xc0 [ 31.915229] do_syscall_64+0x3f/0x90 [ 31.915728] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.916387] [ 31.916611] Freed by task 214: [ 31.917019] kasan_save_stack+0x22/0x50 [ 31.917535] kasan_set_track+0x25/0x30 [ 31.918044] kasan_save_free_info+0x2b/0x50 [ 31.918599] __kasan_slab_free+0x10a/0x190 [ 31.919150] kmem_cache_free+0x10d/0x4d0 [ 31.919677] rcu_core+0x8c8/0x2860 [ 31.920142] __do_softirq+0x1b7/0x7d4 [ 31.920639] [ 31.920862] Last potentially related work creation: [ 31.921479] kasan_save_stack+0x22/0x50 [ 31.922003] __kasan_record_aux_stack+0x8e/0xa0 [ 31.922602] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.923284] remove_vma+0x139/0x170 [ 31.923768] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.924352] do_vmi_munmap+0x1f1/0x2b0 [ 31.924841] __vm_munmap+0x138/0x3a0 [ 31.925305] __x64_sys_munmap+0x59/0x80 [ 31.925807] do_syscall_64+0x3f/0x90 [ 31.926258] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.926871] [ 31.927078] The buggy address belongs to the object at ffff88800e1ebbc8 [ 31.927078] which belongs to the cache vm_area_struct of size 168 [ 31.928472] The buggy address is located 88 bytes inside of [ 31.928472] freed 168-byte region [ffff88800e1ebbc8, ffff88800e1ebc70) [ 31.929800] [ 31.930011] The buggy address belongs to the physical page: [ 31.930637] page:0000000044eab6c7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe1eb [ 31.931657] memcg:ffff88800db16c01 [ 31.932085] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.932701] page_type: 0xffffffff() [ 31.933129] raw: 0100000000000200 ffff88800879fc80 ffffea0000352380 dead000000000008 [ 31.933994] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800db16c01 [ 31.934872] page dumped because: kasan: bad access detected [ 31.935536] [ 31.935758] Memory state around the buggy address: [ 31.936337] ffff88800e1ebb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.937197] ffff88800e1ebb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.938054] >ffff88800e1ebc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.938906] ^ [ 31.939438] ffff88800e1ebc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.940323] ffff88800e1ebd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.941168] ================================================================== [ 31.942150] Disabling lock debugging due to kernel taint [ 34.019683] BUG: Bad rss-counter state mm:00000000a4435af3 type:MM_FILEPAGES val:33 [ 34.020715] BUG: Bad rss-counter state mm:00000000a4435af3 type:MM_ANONPAGES val:22 [ 34.491268] BUG: Bad rss-counter state mm:000000008e3121cd type:MM_FILEPAGES val:33 [ 34.492306] BUG: Bad rss-counter state mm:000000008e3121cd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25449' (ECDSA) to the list of known hosts. 2023/06/20 08:50:13 fuzzer started 2023/06/20 08:50:13 dialing manager at localhost:44161 2023/06/20 08:50:13 checking machine... 2023/06/20 08:50:13 checking revisions... [ 35.222125] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:50:13 testing simple program... [ 35.272520] cgroup: Unknown subsys name 'net' [ 35.312611] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:50:12 Registers: info registers vcpu 0 RAX=ffffffff81808268 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88801a0ffa01 RSI=ffff88801a0ffa88 RDI=ffff88801a0ffa88 RBP=ffff88801a0ff760 RSP=ffff88801a0ff698 R8 =ffffffff8613773a R9 =ffff88801a0ff748 R10=0000000000038001 R11=0000000000020de7 R12=ffff88801a0ff768 R13=ffff88801a0ff750 R14=ffff88801a0ffa90 R15=ffff88801a0ff708 RIP=ffffffff81131041 RFL=00000202 [-------] 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 00007f9ad79ff900 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=00007ffeee596000 CR3=000000000ea3e000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fd8560e0dd0 CR3=000000000c6a6000 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=3201890b61ceed9f124634627f52cef5 XMM02=2c67c8bc2e329bc3000000000011dd20 XMM03=fb795ef6d65770560000000000124b00 XMM04=44bd8fbc481b08f300000000000ae988 XMM05=e4cb8bb95a7664b60000000000134688 XMM06=5614d02a9df3fbda00000000001334f0 XMM07=e042d86d42eb936e0000000000124d80 XMM08=0e96ad2c9540b12b000000000011dd80 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000