syzkaller login: [ 31.313098] BUG: Bad rss-counter state mm:00000000138a9611 type:MM_FILEPAGES val:33 [ 31.314087] BUG: Bad rss-counter state mm:00000000138a9611 type:MM_ANONPAGES val:22 [ 31.473283] ================================================================== [ 31.474358] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.475491] Read of size 8 at addr ffff88800c58a968 by task sshd/220 [ 31.476512] [ 31.476772] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.477789] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.478954] Call Trace: [ 31.479288] [ 31.479579] dump_stack_lvl+0x91/0xf0 [ 31.480074] print_report+0xcc/0x620 [ 31.480562] ? __virt_addr_valid+0x102/0x340 [ 31.481116] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.481737] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.482361] kasan_report+0xbe/0xf0 [ 31.482836] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.483464] vma_interval_tree_remove+0xc75/0xec0 [ 31.484068] vma_prepare+0xc54/0x11a0 [ 31.484549] __split_vma+0x5af/0x950 [ 31.485025] ? __pfx___split_vma+0x10/0x10 [ 31.485548] ? find_held_lock+0x2c/0x110 [ 31.486071] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.486637] ? lock_is_held_type+0x9f/0x120 [ 31.487174] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.487801] ? mtree_range_walk+0x632/0x900 [ 31.488395] ? mas_walk+0x5c7/0x7c0 [ 31.488900] do_vmi_munmap+0x1f1/0x2b0 [ 31.489399] mmap_region+0x1f9/0x2660 [ 31.489901] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.490418] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.491154] ? __pfx_lock_acquire+0x10/0x10 [ 31.491714] ? __pfx_mmap_region+0x10/0x10 [ 31.492287] ? security_mmap_addr+0x7d/0xa0 [ 31.492832] ? get_unmapped_area+0x1f5/0x3f0 [ 31.493386] do_mmap+0x854/0xf00 [ 31.493834] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.494343] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.494929] ksys_mmap_pgoff+0x3af/0x500 [ 31.495466] do_syscall_64+0x3f/0x90 [ 31.495974] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.496624] RIP: 0033:0x7f20f1a45d82 [ 31.497077] 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 [ 31.499191] RSP: 002b:00007ffd38367b08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.500100] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f20f1a45d82 [ 31.500945] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f20f0e7f000 [ 31.501777] RBP: 00007f20f0e7f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.502625] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f48187ab20 [ 31.503481] R13: 00007ffd38367b20 R14: 00007ffd38367b50 R15: 00007ffd38367eb0 [ 31.504334] [ 31.504628] [ 31.504843] Allocated by task 213: [ 31.505277] kasan_save_stack+0x22/0x50 [ 31.505776] kasan_set_track+0x25/0x30 [ 31.506264] __kasan_slab_alloc+0x59/0x70 [ 31.506781] kmem_cache_alloc+0x16b/0x370 [ 31.507297] vm_area_dup+0x20/0x160 [ 31.507774] __split_vma+0x170/0x950 [ 31.508244] split_vma+0xc6/0x110 [ 31.508683] mprotect_fixup+0x8d2/0xb30 [ 31.509192] do_mprotect_pkey+0x87e/0xd40 [ 31.509719] __x64_sys_mprotect+0x78/0xc0 [ 31.510237] do_syscall_64+0x3f/0x90 [ 31.510711] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.511365] [ 31.511578] Freed by task 203: [ 31.511975] kasan_save_stack+0x22/0x50 [ 31.512482] kasan_set_track+0x25/0x30 [ 31.512971] kasan_save_free_info+0x2b/0x50 [ 31.513504] __kasan_slab_free+0x10a/0x190 [ 31.514037] kmem_cache_free+0x10d/0x4d0 [ 31.514543] rcu_core+0x8c8/0x2860 [ 31.514987] __do_softirq+0x1b7/0x7d4 [ 31.515467] [ 31.515684] Last potentially related work creation: [ 31.516263] kasan_save_stack+0x22/0x50 [ 31.516769] __kasan_record_aux_stack+0x8e/0xa0 [ 31.517406] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.518048] remove_vma+0x139/0x170 [ 31.518498] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.519049] do_vmi_munmap+0x1f1/0x2b0 [ 31.519554] __vm_munmap+0x138/0x3a0 [ 31.520019] __x64_sys_munmap+0x59/0x80 [ 31.520518] do_syscall_64+0x3f/0x90 [ 31.520993] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.521630] [ 31.521851] Second to last potentially related work creation: [ 31.522529] kasan_save_stack+0x22/0x50 [ 31.523031] __kasan_record_aux_stack+0x8e/0xa0 [ 31.523604] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.524245] remove_vma+0x139/0x170 [ 31.524695] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.525259] do_vmi_munmap+0x1f1/0x2b0 [ 31.525745] mmap_region+0x1f9/0x2660 [ 31.526222] do_mmap+0x854/0xf00 [ 31.526652] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.527145] ksys_mmap_pgoff+0x3af/0x500 [ 31.527663] do_syscall_64+0x3f/0x90 [ 31.528135] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.528781] [ 31.528996] The buggy address belongs to the object at ffff88800c58a910 [ 31.528996] which belongs to the cache vm_area_struct of size 168 [ 31.530453] The buggy address is located 88 bytes inside of [ 31.530453] freed 168-byte region [ffff88800c58a910, ffff88800c58a9b8) [ 31.531847] [ 31.532060] The buggy address belongs to the physical page: [ 31.532719] page:00000000506df565 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc58a [ 31.533791] memcg:ffff88800ef34301 [ 31.534222] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.534861] page_type: 0xffffffff() [ 31.535311] raw: 0100000000000200 ffff8880087a0c80 ffffea0000319500 dead000000000004 [ 31.536238] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef34301 [ 31.537143] page dumped because: kasan: bad access detected [ 31.537798] [ 31.538014] Memory state around the buggy address: [ 31.538592] ffff88800c58a800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.539445] ffff88800c58a880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.540307] >ffff88800c58a900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.541150] ^ [ 31.541929] ffff88800c58a980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.542775] ffff88800c58aa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.543630] ================================================================== [ 31.544637] Disabling lock debugging due to kernel taint [ 33.391322] BUG: Bad rss-counter state mm:00000000a65a5cff type:MM_FILEPAGES val:33 [ 33.392416] BUG: Bad rss-counter state mm:00000000a65a5cff type:MM_ANONPAGES val:22 [ 33.871608] BUG: Bad rss-counter state mm:00000000296709ac type:MM_FILEPAGES val:33 [ 33.873101] BUG: Bad rss-counter state mm:00000000296709ac type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30623' (ECDSA) to the list of known hosts. 2023/06/20 12:08:54 fuzzer started 2023/06/20 12:08:55 dialing manager at localhost:36067 2023/06/20 12:08:55 checking machine... 2023/06/20 12:08:55 checking revisions... [ 34.627257] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:08:55 testing simple program... [ 34.676112] cgroup: Unknown subsys name 'net' [ 34.716379] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:08:54 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff86621000 RCX=ffffffff81007b82 RDX=ffffffff8542a6c0 RSI=ffffffff86621000 RDI=ffffffffff600000 RBP=0000000000000001 RSP=ffff88806ce099f8 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000001 R11=00000000000b54e7 R12=ffff88806ce09b40 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800d6dc100 RIP=ffffffff814c0438 RFL=00000286 [--S--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 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=00007fd2a0b028c0 CR3=000000000e7fc000 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=2034353a38303a3231203032206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a38303a3231203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888018fdaa48 RCX=00000000fffffe80 RDX=0000000000000000 RSI=ffff88807ffdc000 RDI=ffff88800d6dc100 RBP=ffff888014547d18 RSP=ffff888014547cf0 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff8880087b8500 R13=ffffea000063f680 R14=ffffffff818c73ee R15=ffff88800d6dc100 RIP=ffffffff81809e3c RFL=00000256 [---ZAP-] 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 00007fb4a0193900 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=00007ffc83b88000 CR3=000000000ed62000 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=563412feff00545000000000000080fe 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