[ 30.771926] BUG: Bad rss-counter state mm:000000004c52c093 type:MM_FILEPAGES val:33 [ 30.772936] BUG: Bad rss-counter state mm:000000004c52c093 type:MM_ANONPAGES val:22 [ 30.944094] ================================================================== [ 30.945183] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.946362] Read of size 8 at addr ffff88800e070880 by task sshd/219 [ 30.947226] [ 30.947446] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.948301] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.949299] Call Trace: [ 30.949625] [ 30.949913] dump_stack_lvl+0x91/0xf0 [ 30.950406] print_report+0xcc/0x620 [ 30.950887] ? __virt_addr_valid+0x102/0x340 [ 30.951437] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.952050] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.952661] kasan_report+0xbe/0xf0 [ 30.953137] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.953778] vma_interval_tree_remove+0xc75/0xec0 [ 30.954382] vma_prepare+0xc54/0x11a0 [ 30.954863] __split_vma+0x5af/0x950 [ 30.955336] ? __pfx___split_vma+0x10/0x10 [ 30.955860] ? find_held_lock+0x2c/0x110 [ 30.956421] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.957016] ? lock_is_held_type+0x9f/0x120 [ 30.957581] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.958223] ? mtree_range_walk+0x632/0x900 [ 30.958770] ? mas_walk+0x5c7/0x7c0 [ 30.959251] do_vmi_munmap+0x1f1/0x2b0 [ 30.959746] mmap_region+0x1f9/0x2660 [ 30.960260] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.960802] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.961568] ? __pfx_lock_acquire+0x10/0x10 [ 30.962106] ? __pfx_mmap_region+0x10/0x10 [ 30.962661] ? security_mmap_addr+0x7d/0xa0 [ 30.963196] ? get_unmapped_area+0x1f5/0x3f0 [ 30.963743] do_mmap+0x854/0xf00 [ 30.964184] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.964682] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.965242] ksys_mmap_pgoff+0x3af/0x500 [ 30.965780] do_syscall_64+0x3f/0x90 [ 30.966267] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.966914] RIP: 0033:0x7f1460be4d82 [ 30.967369] 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 [ 30.969529] RSP: 002b:00007ffca0521eb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.970425] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1460be4d82 [ 30.971266] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f146001e000 [ 30.972103] RBP: 00007f146001e000 R08: 0000000000000009 R09: 0000000000001000 [ 30.972948] R10: 0000000000000812 R11: 0000000000000206 R12: 000056044b3c0b20 [ 30.973805] R13: 00007ffca0521ed0 R14: 00007ffca0521f00 R15: 00007ffca0522260 [ 30.974663] [ 30.974955] [ 30.975173] Allocated by task 211: [ 30.975597] kasan_save_stack+0x22/0x50 [ 30.976098] kasan_set_track+0x25/0x30 [ 30.976595] __kasan_slab_alloc+0x59/0x70 [ 30.977115] kmem_cache_alloc+0x16b/0x370 [ 30.977654] vm_area_dup+0x20/0x160 [ 30.978108] __split_vma+0x170/0x950 [ 30.978571] split_vma+0xc6/0x110 [ 30.979013] mprotect_fixup+0x8d2/0xb30 [ 30.979515] do_mprotect_pkey+0x87e/0xd40 [ 30.980037] __x64_sys_mprotect+0x78/0xc0 [ 30.980562] do_syscall_64+0x3f/0x90 [ 30.981039] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.981690] [ 30.981906] Freed by task 211: [ 30.982298] kasan_save_stack+0x22/0x50 [ 30.982802] kasan_set_track+0x25/0x30 [ 30.983296] kasan_save_free_info+0x2b/0x50 [ 30.983826] __kasan_slab_free+0x10a/0x190 [ 30.984357] kmem_cache_free+0x10d/0x4d0 [ 30.984866] rcu_core+0x8c8/0x2860 [ 30.985323] __do_softirq+0x1b7/0x7d4 [ 30.985801] [ 30.986020] Last potentially related work creation: [ 30.986606] kasan_save_stack+0x22/0x50 [ 30.987114] __kasan_record_aux_stack+0x8e/0xa0 [ 30.987684] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.988329] remove_vma+0x139/0x170 [ 30.988780] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.989359] do_vmi_munmap+0x1f1/0x2b0 [ 30.989849] __vm_munmap+0x138/0x3a0 [ 30.990316] __x64_sys_munmap+0x59/0x80 [ 30.990809] do_syscall_64+0x3f/0x90 [ 30.991292] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.991933] [ 30.992145] Second to last potentially related work creation: [ 30.992831] kasan_save_stack+0x22/0x50 [ 30.993335] __kasan_record_aux_stack+0x8e/0xa0 [ 30.993908] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.994557] remove_vma+0x139/0x170 [ 30.995016] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.995570] do_vmi_munmap+0x1f1/0x2b0 [ 30.996054] mmap_region+0x1f9/0x2660 [ 30.996530] do_mmap+0x854/0xf00 [ 30.997012] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.997533] ksys_mmap_pgoff+0x3af/0x500 [ 30.998050] do_syscall_64+0x3f/0x90 [ 30.998575] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.999245] [ 30.999468] The buggy address belongs to the object at ffff88800e070828 [ 30.999468] which belongs to the cache vm_area_struct of size 168 [ 31.001001] The buggy address is located 88 bytes inside of [ 31.001001] freed 168-byte region [ffff88800e070828, ffff88800e0708d0) [ 31.002483] [ 31.002706] The buggy address belongs to the physical page: [ 31.003389] page:00000000da877d4c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe070 [ 31.004525] memcg:ffff88800dfcd701 [ 31.004971] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.005623] page_type: 0xffffffff() [ 31.006075] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.006992] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dfcd701 [ 31.007900] page dumped because: kasan: bad access detected [ 31.008592] [ 31.008825] Memory state around the buggy address: [ 31.009428] ffff88800e070780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.010290] ffff88800e070800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.011148] >ffff88800e070880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.011996] ^ [ 31.012408] ffff88800e070900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.013262] ffff88800e070980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 31.014130] ================================================================== [ 31.015097] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.974929] BUG: Bad rss-counter state mm:00000000dd86897e type:MM_FILEPAGES val:33 [ 32.976111] BUG: Bad rss-counter state mm:00000000dd86897e type:MM_ANONPAGES val:22 [ 33.504687] BUG: Bad rss-counter state mm:000000004cf5434e type:MM_FILEPAGES val:33 [ 33.505894] BUG: Bad rss-counter state mm:000000004cf5434e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40710' (ECDSA) to the list of known hosts. 2023/06/21 01:55:25 fuzzer started 2023/06/21 01:55:25 dialing manager at localhost:36067 2023/06/21 01:55:25 checking machine... 2023/06/21 01:55:25 checking revisions... [ 34.172586] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:55:25 testing simple program... [ 34.216245] cgroup: Unknown subsys name 'net' [ 34.263752] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:55:25 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888016f7fdc0 RCX=0000000000000001 RDX=1ffff11002deff1a RSI=ffff888016f7fd98 RDI=ffff888016f7f8d0 RBP=ffff888008f7a000 RSP=ffff888016f7f858 R8 =0000000000000001 R9 =ffff888016f7f908 R10=0000000000038001 R11=00000000000244c6 R12=ffff888016f7f928 R13=ffff888016f7f910 R14=ffff888016f7fd98 R15=ffff888016f7f8c8 RIP=ffffffff81131c83 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 00007fc950b15900 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=00007fc9510cd0b0 CR3=000000000e806000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fd0d5b75140 CR3=000000000c622000 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=00000000000000000000000000000000 XMM01=ca70988e720453ac964fedefe0412c7d XMM02=000000000011b778eff9b2d0a8fce9cb XMM03=000000000011b8482c67c8bc2e329bc3 XMM04=19aa642a8c7a303700000000000ae988 XMM05=7a9208374ff047de00000000001339f0 XMM06=806171799158d9670000000000132720 XMM07=e042d86d42eb936e0000000000121c70 XMM08=cc989645e1e6e8f3000000000011b848 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000