syzkaller login: [ 35.354983] BUG: Bad rss-counter state mm:00000000248ec503 type:MM_FILEPAGES val:33 [ 35.356168] BUG: Bad rss-counter state mm:00000000248ec503 type:MM_ANONPAGES val:22 [ 35.518390] ================================================================== [ 35.519320] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.520253] Read of size 8 at addr ffff88801866c798 by task sshd/219 [ 35.521040] [ 35.521268] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.522325] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.523349] Call Trace: [ 35.523675] [ 35.523967] dump_stack_lvl+0x91/0xf0 [ 35.524470] print_report+0xcc/0x620 [ 35.524963] ? __virt_addr_valid+0x102/0x340 [ 35.525515] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.526148] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.526779] kasan_report+0xbe/0xf0 [ 35.527282] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.527917] vma_interval_tree_remove+0xc75/0xec0 [ 35.528535] vma_prepare+0xc54/0x11a0 [ 35.529023] __split_vma+0x5af/0x950 [ 35.529506] ? __pfx___split_vma+0x10/0x10 [ 35.530049] ? find_held_lock+0x2c/0x110 [ 35.530578] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.531154] ? lock_is_held_type+0x9f/0x120 [ 35.531729] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.532351] ? mtree_range_walk+0x632/0x900 [ 35.532908] ? mas_walk+0x5c7/0x7c0 [ 35.533393] do_vmi_munmap+0x1f1/0x2b0 [ 35.533890] mmap_region+0x1f9/0x2660 [ 35.534382] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.534905] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.535641] ? __pfx_lock_acquire+0x10/0x10 [ 35.536185] ? __pfx_mmap_region+0x10/0x10 [ 35.536722] ? security_mmap_addr+0x7d/0xa0 [ 35.537262] ? get_unmapped_area+0x1f5/0x3f0 [ 35.537827] do_mmap+0x854/0xf00 [ 35.538275] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.538777] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.539371] ksys_mmap_pgoff+0x3af/0x500 [ 35.539895] do_syscall_64+0x3f/0x90 [ 35.540378] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.541028] RIP: 0033:0x7fd746b97d82 [ 35.541502] 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 [ 35.543699] RSP: 002b:00007ffd5c4fdca8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.544628] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd746b97d82 [ 35.545496] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd745fd1000 [ 35.546363] RBP: 00007fd745fd1000 R08: 0000000000000009 R09: 0000000000001000 [ 35.547229] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fcab5aaec0 [ 35.548127] R13: 00007ffd5c4fdcc0 R14: 00007ffd5c4fdcf0 R15: 00007ffd5c4fe050 [ 35.548997] [ 35.549303] [ 35.549526] Allocated by task 212: [ 35.549964] kasan_save_stack+0x22/0x50 [ 35.550486] kasan_set_track+0x25/0x30 [ 35.550991] __kasan_slab_alloc+0x59/0x70 [ 35.551541] kmem_cache_alloc+0x16b/0x370 [ 35.552068] vm_area_dup+0x20/0x160 [ 35.552539] __split_vma+0x170/0x950 [ 35.553015] split_vma+0xc6/0x110 [ 35.553471] mprotect_fixup+0x8d2/0xb30 [ 35.553992] do_mprotect_pkey+0x87e/0xd40 [ 35.554524] __x64_sys_mprotect+0x78/0xc0 [ 35.555064] do_syscall_64+0x3f/0x90 [ 35.555581] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.556231] [ 35.556455] Freed by task 212: [ 35.556864] kasan_save_stack+0x22/0x50 [ 35.557380] kasan_set_track+0x25/0x30 [ 35.557881] kasan_save_free_info+0x2b/0x50 [ 35.558439] __kasan_slab_free+0x10a/0x190 [ 35.558982] kmem_cache_free+0x10d/0x4d0 [ 35.559512] rcu_core+0x8c8/0x2860 [ 35.559966] __do_softirq+0x1b7/0x7d4 [ 35.560455] [ 35.560675] Last potentially related work creation: [ 35.561274] kasan_save_stack+0x22/0x50 [ 35.561792] __kasan_record_aux_stack+0x8e/0xa0 [ 35.562391] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.563128] remove_vma+0x139/0x170 [ 35.563625] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.564198] do_vmi_munmap+0x1f1/0x2b0 [ 35.564692] __vm_munmap+0x138/0x3a0 [ 35.565170] __x64_sys_munmap+0x59/0x80 [ 35.565680] do_syscall_64+0x3f/0x90 [ 35.566170] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.566833] [ 35.567056] The buggy address belongs to the object at ffff88801866c740 [ 35.567056] which belongs to the cache vm_area_struct of size 168 [ 35.568580] The buggy address is located 88 bytes inside of [ 35.568580] freed 168-byte region [ffff88801866c740, ffff88801866c7e8) [ 35.570038] [ 35.570270] The buggy address belongs to the physical page: [ 35.570945] page:0000000026fa6c26 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1866c [ 35.572070] memcg:ffff888013eda601 [ 35.572504] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.573162] page_type: 0xffffffff() [ 35.573623] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.574561] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013eda601 [ 35.575509] page dumped because: kasan: bad access detected [ 35.576188] [ 35.576413] Memory state around the buggy address: [ 35.577006] ffff88801866c680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.577904] ffff88801866c700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 35.578775] >ffff88801866c780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 35.579654] ^ [ 35.580153] ffff88801866c800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 35.581020] ffff88801866c880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 35.581882] ================================================================== [ 35.582812] Disabling lock debugging due to kernel taint [ 37.602416] BUG: Bad rss-counter state mm:00000000f34541ae type:MM_FILEPAGES val:33 [ 37.603506] BUG: Bad rss-counter state mm:00000000f34541ae type:MM_ANONPAGES val:22 [ 38.088418] BUG: Bad rss-counter state mm:00000000f8250655 type:MM_FILEPAGES val:33 [ 38.089561] BUG: Bad rss-counter state mm:00000000f8250655 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28225' (ECDSA) to the list of known hosts. 2023/06/19 10:59:50 fuzzer started 2023/06/19 10:59:50 dialing manager at localhost:44161 2023/06/19 10:59:50 checking machine... 2023/06/19 10:59:50 checking revisions... [ 38.789289] kmemleak: Automatic memory scanning thread ended 2023/06/19 10:59:50 testing simple program... [ 38.844788] cgroup: Unknown subsys name 'net' [ 38.887734] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:59:45 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff110011aff2b RSI=ffffffff8118d7d9 RDI=ffff888008d7f958 RBP=ffff888008d7f9f0 RSP=ffff888008d7f930 R8 =0000000000000001 R9 =ffff888008d7f998 R10=0000000000038001 R11=00000000000b5c92 R12=ffff888008d7fa20 R13=0000000000000000 R14=ffff888008d70000 R15=ffff888008d7f958 RIP=ffffffff811305f0 RFL=00000216 [----AP-] 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 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=00007fcfcebbb180 CR3=0000000018764000 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=2030353a39353a3031203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039343a39353a3031203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff88801a027720 RCX=ffff88801a027720 RDX=00000000000d000d RSI=ffff88801a027720 RDI=ffff88800844f780 RBP=ffff888016b57c88 RSP=ffff888016b57bf0 R8 =00000000800d000c R9 =0000000000000000 R10=ffffea00006809c0 R11=00000000800d0005 R12=ffffea00006809c0 R13=0000000000000000 R14=00000000000d000c R15=ffff88800844f780 RIP=ffffffff818094f2 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 00007fa979bec900 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=00007ffe355f3000 CR3=000000000ef06000 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=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