syzkaller login: [ 33.369684] BUG: Bad rss-counter state mm:000000008b119b7d type:MM_FILEPAGES val:33 [ 33.370869] BUG: Bad rss-counter state mm:000000008b119b7d type:MM_ANONPAGES val:22 [ 33.535250] ================================================================== [ 33.536208] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.537186] Read of size 8 at addr ffff88800dab9140 by task sshd/221 [ 33.538086] [ 33.538313] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.539213] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.540233] Call Trace: [ 33.540559] [ 33.540852] dump_stack_lvl+0x91/0xf0 [ 33.541355] print_report+0xcc/0x620 [ 33.541852] ? __virt_addr_valid+0x102/0x340 [ 33.542425] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.543098] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.543723] kasan_report+0xbe/0xf0 [ 33.544214] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.544837] vma_interval_tree_remove+0xc75/0xec0 [ 33.545471] vma_prepare+0xc54/0x11a0 [ 33.545972] __split_vma+0x5af/0x950 [ 33.546450] ? __pfx___split_vma+0x10/0x10 [ 33.547035] ? find_held_lock+0x2c/0x110 [ 33.547562] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.548144] ? lock_is_held_type+0x9f/0x120 [ 33.548707] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.549336] ? mtree_range_walk+0x632/0x900 [ 33.549893] ? mas_walk+0x5c7/0x7c0 [ 33.550389] do_vmi_munmap+0x1f1/0x2b0 [ 33.550900] mmap_region+0x1f9/0x2660 [ 33.551403] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.551940] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.552692] ? __pfx_lock_acquire+0x10/0x10 [ 33.553240] ? __pfx_mmap_region+0x10/0x10 [ 33.553787] ? security_mmap_addr+0x7d/0xa0 [ 33.554339] ? get_unmapped_area+0x1f5/0x3f0 [ 33.554928] do_mmap+0x854/0xf00 [ 33.555378] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.555875] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.556461] ksys_mmap_pgoff+0x3af/0x500 [ 33.557003] do_syscall_64+0x3f/0x90 [ 33.557495] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.558180] RIP: 0033:0x7fd33dbbed82 [ 33.558653] 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 [ 33.560841] RSP: 002b:00007ffc4e3268d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.561801] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd33dbbed82 [ 33.562702] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd33cff8000 [ 33.563577] RBP: 00007fd33cff8000 R08: 0000000000000009 R09: 0000000000001000 [ 33.564438] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ceca0f9ec0 [ 33.565331] R13: 00007ffc4e3268f0 R14: 00007ffc4e326920 R15: 00007ffc4e326c80 [ 33.566210] [ 33.566515] [ 33.566757] Allocated by task 214: [ 33.567205] kasan_save_stack+0x22/0x50 [ 33.567727] kasan_set_track+0x25/0x30 [ 33.568242] __kasan_slab_alloc+0x59/0x70 [ 33.568777] kmem_cache_alloc+0x16b/0x370 [ 33.569341] vm_area_dup+0x20/0x160 [ 33.569808] __split_vma+0x170/0x950 [ 33.570304] split_vma+0xc6/0x110 [ 33.570780] mprotect_fixup+0x8d2/0xb30 [ 33.571316] do_mprotect_pkey+0x87e/0xd40 [ 33.571854] __x64_sys_mprotect+0x78/0xc0 [ 33.572393] do_syscall_64+0x3f/0x90 [ 33.572884] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.573552] [ 33.573774] Freed by task 214: [ 33.574190] kasan_save_stack+0x22/0x50 [ 33.574729] kasan_set_track+0x25/0x30 [ 33.575243] kasan_save_free_info+0x2b/0x50 [ 33.575779] __kasan_slab_free+0x10a/0x190 [ 33.576344] kmem_cache_free+0x10d/0x4d0 [ 33.576861] rcu_core+0x8c8/0x2860 [ 33.577335] __do_softirq+0x1b7/0x7d4 [ 33.577817] [ 33.578084] Last potentially related work creation: [ 33.578892] kasan_save_stack+0x22/0x50 [ 33.579589] __kasan_record_aux_stack+0x8e/0xa0 [ 33.580221] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.580871] remove_vma+0x139/0x170 [ 33.581343] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.582041] do_vmi_munmap+0x1f1/0x2b0 [ 33.582722] __vm_munmap+0x138/0x3a0 [ 33.583243] __x64_sys_munmap+0x59/0x80 [ 33.583761] do_syscall_64+0x3f/0x90 [ 33.584253] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.584929] [ 33.585162] The buggy address belongs to the object at ffff88800dab90e8 [ 33.585162] which belongs to the cache vm_area_struct of size 168 [ 33.586669] The buggy address is located 88 bytes inside of [ 33.586669] freed 168-byte region [ffff88800dab90e8, ffff88800dab9190) [ 33.588199] [ 33.588433] The buggy address belongs to the physical page: [ 33.589184] page:000000008e061f2e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdab9 [ 33.590415] memcg:ffff88800c6e4601 [ 33.590917] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.591654] page_type: 0xffffffff() [ 33.592173] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.593216] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c6e4601 [ 33.594244] page dumped because: kasan: bad access detected [ 33.595027] [ 33.595260] Memory state around the buggy address: [ 33.595899] ffff88800dab9000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.596874] ffff88800dab9080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 33.597839] >ffff88800dab9100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.598806] ^ [ 33.599539] ffff88800dab9180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 33.600508] ffff88800dab9200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 33.601478] ================================================================== [ 33.602705] Disabling lock debugging due to kernel taint [ 35.519661] BUG: Bad rss-counter state mm:00000000ba1bb35f type:MM_FILEPAGES val:33 [ 35.520712] BUG: Bad rss-counter state mm:00000000ba1bb35f type:MM_ANONPAGES val:22 [ 36.008879] BUG: Bad rss-counter state mm:00000000b6cb58f2 type:MM_FILEPAGES val:33 [ 36.009852] BUG: Bad rss-counter state mm:00000000b6cb58f2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3628' (ECDSA) to the list of known hosts. 2023/06/20 04:15:10 fuzzer started 2023/06/20 04:15:11 dialing manager at localhost:44161 2023/06/20 04:15:11 checking machine... 2023/06/20 04:15:11 checking revisions... [ 36.722383] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:15:11 testing simple program... [ 36.778184] cgroup: Unknown subsys name 'net' [ 36.842763] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:15:08 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff86141ef4 RDX=0000000000000008 RSI=ffff888016aa7e28 RDI=ffff888016aa78d8 RBP=ffff888016aa7930 RSP=ffff888016aa7860 R8 =0000000000000001 R9 =ffff888016aa7918 R10=0000000000038001 R11=00000000000229dc R12=ffff888016aa7938 R13=ffff888016aa7920 R14=ffff888016aa7e28 R15=ffff888016aa78d8 RIP=ffffffff811303fa RFL=00000287 [--S--PC] 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 00007efcf2183900 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=00007fff8c41a000 CR3=000000000ed8e000 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=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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 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=00007ffd24d8a808 CR3=000000001697c000 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=2030313a35313a3430203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030313a35313a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000