syzkaller login: [ 30.820913] BUG: Bad rss-counter state mm:000000005623c750 type:MM_FILEPAGES val:33 [ 30.822132] BUG: Bad rss-counter state mm:000000005623c750 type:MM_ANONPAGES val:22 [ 30.862046] ================================================================== [ 30.862955] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.864000] Read of size 8 at addr ffff88800d4cec20 by task sshd/220 [ 30.864774] [ 30.864990] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.865866] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.866848] Call Trace: [ 30.867170] [ 30.867453] dump_stack_lvl+0x91/0xf0 [ 30.867947] print_report+0xcc/0x620 [ 30.868439] ? __virt_addr_valid+0x102/0x340 [ 30.868997] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.869619] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.870235] kasan_report+0xbe/0xf0 [ 30.870719] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.871336] vma_interval_tree_remove+0xc75/0xec0 [ 30.871946] vma_prepare+0xc54/0x11a0 [ 30.872437] __split_vma+0x5af/0x950 [ 30.872908] ? __pfx___split_vma+0x10/0x10 [ 30.873446] ? find_held_lock+0x2c/0x110 [ 30.873972] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.874543] ? lock_is_held_type+0x9f/0x120 [ 30.875086] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.875706] ? mtree_range_walk+0x632/0x900 [ 30.876274] ? mas_walk+0x5c7/0x7c0 [ 30.876758] do_vmi_munmap+0x1f1/0x2b0 [ 30.877252] mmap_region+0x1f9/0x2660 [ 30.877733] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.878241] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.878966] ? __pfx_lock_acquire+0x10/0x10 [ 30.879498] ? __pfx_mmap_region+0x10/0x10 [ 30.880030] ? security_mmap_addr+0x7d/0xa0 [ 30.880573] ? get_unmapped_area+0x1f5/0x3f0 [ 30.881116] do_mmap+0x854/0xf00 [ 30.881555] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.882052] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.882609] ksys_mmap_pgoff+0x3af/0x500 [ 30.883111] do_syscall_64+0x3f/0x90 [ 30.883588] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.884315] RIP: 0033:0x7f8c7ee05d82 [ 30.884772] 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 [ 30.886864] RSP: 002b:00007ffdb2a94698 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.887765] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8c7ee05d82 [ 30.888624] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8c7e23f000 [ 30.889468] RBP: 00007f8c7e23f000 R08: 0000000000000009 R09: 0000000000001000 [ 30.890307] R10: 0000000000000812 R11: 0000000000000206 R12: 00005581d9efeec0 [ 30.891148] R13: 00007ffdb2a946b0 R14: 00007ffdb2a946e0 R15: 00007ffdb2a94a40 [ 30.891997] [ 30.892298] [ 30.892510] Allocated by task 213: [ 30.892935] kasan_save_stack+0x22/0x50 [ 30.893436] kasan_set_track+0x25/0x30 [ 30.893929] __kasan_slab_alloc+0x59/0x70 [ 30.894452] kmem_cache_alloc+0x16b/0x370 [ 30.894965] vm_area_dup+0x20/0x160 [ 30.895424] __split_vma+0x170/0x950 [ 30.895892] split_vma+0xc6/0x110 [ 30.896342] mprotect_fixup+0x8d2/0xb30 [ 30.896847] do_mprotect_pkey+0x87e/0xd40 [ 30.897366] __x64_sys_mprotect+0x78/0xc0 [ 30.897886] do_syscall_64+0x3f/0x90 [ 30.898362] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.899003] [ 30.899215] Freed by task 213: [ 30.899611] kasan_save_stack+0x22/0x50 [ 30.900112] kasan_set_track+0x25/0x30 [ 30.900626] kasan_save_free_info+0x2b/0x50 [ 30.901156] __kasan_slab_free+0x10a/0x190 [ 30.901687] kmem_cache_free+0x10d/0x4d0 [ 30.902193] rcu_core+0x8c8/0x2860 [ 30.902635] __do_softirq+0x1b7/0x7d4 [ 30.903116] [ 30.903332] Last potentially related work creation: [ 30.903915] kasan_save_stack+0x22/0x50 [ 30.904445] __kasan_record_aux_stack+0x8e/0xa0 [ 30.905022] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.905671] remove_vma+0x139/0x170 [ 30.906118] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.906671] do_vmi_munmap+0x1f1/0x2b0 [ 30.907161] __vm_munmap+0x138/0x3a0 [ 30.907624] __x64_sys_munmap+0x59/0x80 [ 30.908120] do_syscall_64+0x3f/0x90 [ 30.908618] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.909255] [ 30.909469] Second to last potentially related work creation: [ 30.910156] kasan_save_stack+0x22/0x50 [ 30.910666] __kasan_record_aux_stack+0x8e/0xa0 [ 30.911239] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.911880] remove_vma+0x139/0x170 [ 30.912346] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.912903] do_vmi_munmap+0x1f1/0x2b0 [ 30.913392] mmap_region+0x1f9/0x2660 [ 30.913869] do_mmap+0x854/0xf00 [ 30.914302] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.914797] ksys_mmap_pgoff+0x3af/0x500 [ 30.915301] do_syscall_64+0x3f/0x90 [ 30.915781] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.916449] [ 30.916666] The buggy address belongs to the object at ffff88800d4cebc8 [ 30.916666] which belongs to the cache vm_area_struct of size 168 [ 30.918141] The buggy address is located 88 bytes inside of [ 30.918141] freed 168-byte region [ffff88800d4cebc8, ffff88800d4cec70) [ 30.919552] [ 30.919773] The buggy address belongs to the physical page: [ 30.920448] page:00000000f0435e50 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd4ce [ 30.921535] memcg:ffff88800c841e01 [ 30.921963] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.922611] page_type: 0xffffffff() [ 30.923064] raw: 0100000000000200 ffff8880087a0c80 ffffea000034ec80 dead000000000006 [ 30.923991] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c841e01 [ 30.924910] page dumped because: kasan: bad access detected [ 30.925568] [ 30.925784] Memory state around the buggy address: [ 30.926357] ffff88800d4ceb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.927229] ffff88800d4ceb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.928086] >ffff88800d4cec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.928984] ^ [ 30.929516] ffff88800d4cec80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.930367] ffff88800d4ced00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.931213] ================================================================== [ 30.932495] Disabling lock debugging due to kernel taint [ 32.915373] BUG: Bad rss-counter state mm:00000000a71be2e8 type:MM_FILEPAGES val:33 [ 32.916975] BUG: Bad rss-counter state mm:00000000a71be2e8 type:MM_ANONPAGES val:22 [ 33.391031] BUG: Bad rss-counter state mm:000000005fb654fe type:MM_FILEPAGES val:33 [ 33.392136] BUG: Bad rss-counter state mm:000000005fb654fe type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55033' (ECDSA) to the list of known hosts. 2023/06/20 16:29:27 fuzzer started 2023/06/20 16:29:28 dialing manager at localhost:36067 2023/06/20 16:29:28 checking machine... 2023/06/20 16:29:28 checking revisions... [ 34.123103] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:29:28 testing simple program... [ 34.170302] cgroup: Unknown subsys name 'net' [ 34.224420] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:29:27 Registers: info registers vcpu 0 RAX=1ffff11001cdffdb RBX=ffff88800e6ffea8 RCX=1ffff11001b83bdc RDX=dffffc0000000000 RSI=ffff88800e406ba0 RDI=ffff88800e6ffed8 RBP=ffff88800dc1deb0 RSP=ffff888016ce7bc8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff88800e406b80 R13=0000000000000000 R14=ffff88800ed15508 R15=ffff88800ed154c0 RIP=ffffffff8184767e 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 00007f88bba1a900 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=00007fff8ed9e000 CR3=000000000e59e000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09b18 RCX=0000000000000001 RDX=0000000000000000 RSI=ffffffff81289068 RDI=ffff88806cf09b24 RBP=000000000000000d RSP=ffff88806cf09a30 R8 =0000000000000001 R9 =ffff88806cf09a90 R10=0000000000038001 R11=000000000000ba8f R12=ffff88806cf09b18 R13=0000000000000000 R14=ffff888008d951c0 R15=ffff88800ee0df00 RIP=ffffffff813ad4ee RFL=00000213 [----A-C] 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=00007ffb2b15bfb0 CR3=000000000eda6000 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=2037323a39323a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a39323a3631203032 XMM08=00007fb3a0018ee00000005600000080 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000