syzkaller login: [ 60.499074] BUG: Bad rss-counter state mm:000000004a754cef type:MM_FILEPAGES val:33 [ 60.500402] BUG: Bad rss-counter state mm:000000004a754cef type:MM_ANONPAGES val:22 [ 60.541503] ================================================================== [ 60.542719] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.543906] Read of size 8 at addr ffff88800ed07310 by task sshd/220 [ 60.544744] [ 60.544980] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.545902] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.546959] Call Trace: [ 60.547305] [ 60.547613] dump_stack_lvl+0x91/0xf0 [ 60.548143] print_report+0xcc/0x620 [ 60.548676] ? __virt_addr_valid+0x102/0x340 [ 60.549274] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.549944] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.550631] kasan_report+0xbe/0xf0 [ 60.551140] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.551822] vma_interval_tree_remove+0xc75/0xec0 [ 60.552470] vma_prepare+0xc54/0x11a0 [ 60.553002] __split_vma+0x5af/0x950 [ 60.553513] ? __pfx___split_vma+0x10/0x10 [ 60.554088] ? find_held_lock+0x2c/0x110 [ 60.554645] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.555263] ? lock_is_held_type+0x9f/0x120 [ 60.555847] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.556501] ? mtree_range_walk+0x632/0x900 [ 60.557122] ? mas_walk+0x5c7/0x7c0 [ 60.557641] do_vmi_munmap+0x1f1/0x2b0 [ 60.558173] mmap_region+0x1f9/0x2660 [ 60.558698] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.559253] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.560023] ? __pfx_lock_acquire+0x10/0x10 [ 60.560658] ? __pfx_mmap_region+0x10/0x10 [ 60.561263] ? security_mmap_addr+0x7d/0xa0 [ 60.561865] ? get_unmapped_area+0x1f5/0x3f0 [ 60.562497] do_mmap+0x854/0xf00 [ 60.562998] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.563559] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.564194] ksys_mmap_pgoff+0x3af/0x500 [ 60.564784] do_syscall_64+0x3f/0x90 [ 60.565330] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.566070] RIP: 0033:0x7f6db4f4dd82 [ 60.566595] 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 [ 60.569012] RSP: 002b:00007ffe11665268 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.570040] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6db4f4dd82 [ 60.570983] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6db4387000 [ 60.571926] RBP: 00007f6db4387000 R08: 0000000000000009 R09: 0000000000001000 [ 60.572877] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563e47517ec0 [ 60.573815] R13: 00007ffe11665280 R14: 00007ffe116652b0 R15: 00007ffe11665610 [ 60.574771] [ 60.575093] [ 60.575338] Allocated by task 213: [ 60.575825] kasan_save_stack+0x22/0x50 [ 60.576389] kasan_set_track+0x25/0x30 [ 60.576959] __kasan_slab_alloc+0x59/0x70 [ 60.577542] kmem_cache_alloc+0x16b/0x370 [ 60.578120] vm_area_dup+0x20/0x160 [ 60.578622] __split_vma+0x170/0x950 [ 60.579154] split_vma+0xc6/0x110 [ 60.579657] mprotect_fixup+0x8d2/0xb30 [ 60.580229] do_mprotect_pkey+0x87e/0xd40 [ 60.580829] __x64_sys_mprotect+0x78/0xc0 [ 60.581426] do_syscall_64+0x3f/0x90 [ 60.581972] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.582704] [ 60.582954] Freed by task 213: [ 60.583400] kasan_save_stack+0x22/0x50 [ 60.583971] kasan_set_track+0x25/0x30 [ 60.584611] kasan_save_free_info+0x2b/0x50 [ 60.585223] __kasan_slab_free+0x10a/0x190 [ 60.585811] kmem_cache_free+0x10d/0x4d0 [ 60.586383] rcu_core+0x8c8/0x2860 [ 60.586882] __do_softirq+0x1b7/0x7d4 [ 60.587416] [ 60.587659] Last potentially related work creation: [ 60.588303] kasan_save_stack+0x22/0x50 [ 60.588886] __kasan_record_aux_stack+0x8e/0xa0 [ 60.589528] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.590249] remove_vma+0x139/0x170 [ 60.590760] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.591385] do_vmi_munmap+0x1f1/0x2b0 [ 60.591938] __vm_munmap+0x138/0x3a0 [ 60.592467] __x64_sys_munmap+0x59/0x80 [ 60.593038] do_syscall_64+0x3f/0x90 [ 60.593569] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.594281] [ 60.594527] The buggy address belongs to the object at ffff88800ed072b8 [ 60.594527] which belongs to the cache vm_area_struct of size 168 [ 60.596179] The buggy address is located 88 bytes inside of [ 60.596179] freed 168-byte region [ffff88800ed072b8, ffff88800ed07360) [ 60.597765] [ 60.598010] The buggy address belongs to the physical page: [ 60.598749] page:00000000ee30907b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed07 [ 60.599968] memcg:ffff88800cba0801 [ 60.600446] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.601165] page_type: 0xffffffff() [ 60.601667] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 60.602690] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cba0801 [ 60.603700] page dumped because: kasan: bad access detected [ 60.604454] [ 60.604714] Memory state around the buggy address: [ 60.605383] ffff88800ed07200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 60.606323] ffff88800ed07280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 60.607273] >ffff88800ed07300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 60.608217] ^ [ 60.608734] ffff88800ed07380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 60.609683] ffff88800ed07400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 60.610616] ================================================================== [ 60.611738] Disabling lock debugging due to kernel taint [ 62.400566] BUG: Bad rss-counter state mm:00000000796a7d26 type:MM_FILEPAGES val:33 [ 62.401628] BUG: Bad rss-counter state mm:00000000796a7d26 type:MM_ANONPAGES val:22 [ 62.901276] BUG: Bad rss-counter state mm:00000000e2203fcf type:MM_FILEPAGES val:33 [ 62.902456] BUG: Bad rss-counter state mm:00000000e2203fcf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27996' (ECDSA) to the list of known hosts. 2023/06/20 12:13:15 fuzzer started 2023/06/20 12:13:15 dialing manager at localhost:36067 2023/06/20 12:13:15 checking machine... 2023/06/20 12:13:15 checking revisions... [ 63.608010] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:13:16 testing simple program... [ 63.651512] cgroup: Unknown subsys name 'net' [ 63.690624] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:13:15 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800fe37878 RCX=ffff88800fe37918 RDX=1ffff11001fc6f1a RSI=ffff88800fe37910 RDI=ffffffff813ad720 RBP=ffff88800fe378d0 RSP=ffff88800fe37860 R8 =0000000000000001 R9 =ffff88800fe378b8 R10=0000000000038001 R11=0000000000003c0d R12=ffff88800fe37940 R13=0000000000000000 R14=ffff888010299b40 R15=0000000000092cc0 RIP=ffffffff811303b2 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 00007f3d6d64a900 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=00007f3d6dc020b0 CR3=0000000019abc000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=0000000000000001 RCX=ffffffff8136c434 RDX=00000000000036c4 RSI=00000000000036c4 RDI=ffffffff864f7500 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =0000000000000000 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000fb71 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff811307c2 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 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=00007ffdf19452c8 CR3=000000000f97c000 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=2035313a33313a3231203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035313a33313a3231203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000