[ 34.959258] BUG: Bad rss-counter state mm:00000000951f6ccd type:MM_FILEPAGES val:33 [ 34.961344] BUG: Bad rss-counter state mm:00000000951f6ccd type:MM_ANONPAGES val:22 [ 35.117899] ================================================================== [ 35.118824] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.119781] Read of size 8 at addr ffff88800e589968 by task sshd/219 [ 35.120714] [ 35.120939] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.121836] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.122835] Call Trace: [ 35.123149] [ 35.123434] dump_stack_lvl+0x91/0xf0 [ 35.123935] print_report+0xcc/0x620 [ 35.124435] ? __virt_addr_valid+0x102/0x340 [ 35.124982] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.125611] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.126241] kasan_report+0xbe/0xf0 [ 35.126723] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.127355] vma_interval_tree_remove+0xc75/0xec0 [ 35.127950] vma_prepare+0xc54/0x11a0 [ 35.128452] __split_vma+0x5af/0x950 [ 35.128928] ? __pfx___split_vma+0x10/0x10 [ 35.129449] ? find_held_lock+0x2c/0x110 [ 35.129994] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.130555] ? lock_is_held_type+0x9f/0x120 [ 35.131084] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.131685] ? mtree_range_walk+0x632/0x900 [ 35.132234] ? mas_walk+0x5c7/0x7c0 [ 35.132704] do_vmi_munmap+0x1f1/0x2b0 [ 35.133212] mmap_region+0x1f9/0x2660 [ 35.133706] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.134224] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.134936] ? __pfx_lock_acquire+0x10/0x10 [ 35.135472] ? __pfx_mmap_region+0x10/0x10 [ 35.136002] ? security_mmap_addr+0x7d/0xa0 [ 35.136533] ? get_unmapped_area+0x1f5/0x3f0 [ 35.137087] do_mmap+0x854/0xf00 [ 35.137543] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.138038] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.138601] ksys_mmap_pgoff+0x3af/0x500 [ 35.139122] do_syscall_64+0x3f/0x90 [ 35.139601] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.140244] RIP: 0033:0x7f3e4233cd82 [ 35.140695] 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 [ 35.142809] RSP: 002b:00007ffee4c70528 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.143712] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3e4233cd82 [ 35.144564] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3e41776000 [ 35.145412] RBP: 00007f3e41776000 R08: 0000000000000009 R09: 0000000000001000 [ 35.146286] R10: 0000000000000812 R11: 0000000000000206 R12: 000055817c5ddec0 [ 35.147132] R13: 00007ffee4c70540 R14: 00007ffee4c70570 R15: 00007ffee4c708d0 [ 35.147988] [ 35.148286] [ 35.148504] Allocated by task 212: [ 35.148937] kasan_save_stack+0x22/0x50 [ 35.149443] kasan_set_track+0x25/0x30 [ 35.149946] __kasan_slab_alloc+0x59/0x70 [ 35.150468] kmem_cache_alloc+0x16b/0x370 [ 35.150979] vm_area_dup+0x20/0x160 [ 35.151446] __split_vma+0x170/0x950 [ 35.151911] split_vma+0xc6/0x110 [ 35.152357] mprotect_fixup+0x8d2/0xb30 [ 35.152856] do_mprotect_pkey+0x87e/0xd40 [ 35.153378] __x64_sys_mprotect+0x78/0xc0 [ 35.153921] do_syscall_64+0x3f/0x90 [ 35.154408] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.155063] [ 35.155283] Freed by task 212: [ 35.155675] kasan_save_stack+0x22/0x50 [ 35.156205] kasan_set_track+0x25/0x30 [ 35.156701] kasan_save_free_info+0x2b/0x50 [ 35.157246] __kasan_slab_free+0x10a/0x190 [ 35.157801] kmem_cache_free+0x10d/0x4d0 [ 35.158314] rcu_core+0x8c8/0x2860 [ 35.158758] __do_softirq+0x1b7/0x7d4 [ 35.159243] [ 35.159456] Last potentially related work creation: [ 35.160035] kasan_save_stack+0x22/0x50 [ 35.160530] __kasan_record_aux_stack+0x8e/0xa0 [ 35.161102] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.161798] remove_vma+0x139/0x170 [ 35.162250] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.162803] do_vmi_munmap+0x1f1/0x2b0 [ 35.163289] __vm_munmap+0x138/0x3a0 [ 35.163755] __x64_sys_munmap+0x59/0x80 [ 35.164246] do_syscall_64+0x3f/0x90 [ 35.164716] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.165355] [ 35.165589] Second to last potentially related work creation: [ 35.166292] kasan_save_stack+0x22/0x50 [ 35.166810] __kasan_record_aux_stack+0x8e/0xa0 [ 35.167394] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.168038] remove_vma+0x139/0x170 [ 35.168496] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.169055] do_vmi_munmap+0x1f1/0x2b0 [ 35.169548] mmap_region+0x1f9/0x2660 [ 35.170028] do_mmap+0x854/0xf00 [ 35.170459] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.170959] ksys_mmap_pgoff+0x7d/0x500 [ 35.171451] do_syscall_64+0x3f/0x90 [ 35.171927] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.172558] [ 35.172775] The buggy address belongs to the object at ffff88800e589910 [ 35.172775] which belongs to the cache vm_area_struct of size 168 [ 35.174260] The buggy address is located 88 bytes inside of [ 35.174260] freed 168-byte region [ffff88800e589910, ffff88800e5899b8) [ 35.175669] [ 35.175887] The buggy address belongs to the physical page: [ 35.176541] page:00000000f247bcde refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe589 [ 35.177644] memcg:ffff88800e669901 [ 35.178076] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.178790] page_type: 0xffffffff() [ 35.179240] raw: 0100000000000200 ffff88800879fc80 ffffea00003cc840 dead000000000007 [ 35.180176] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e669901 [ 35.181088] page dumped because: kasan: bad access detected [ 35.181754] [ 35.181970] Memory state around the buggy address: [ 35.182569] ffff88800e589800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 35.183427] ffff88800e589880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 35.184298] >ffff88800e589900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.185154] ^ [ 35.185944] ffff88800e589980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 35.186794] ffff88800e589a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.187637] ================================================================== [ 35.188608] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 37.351675] BUG: Bad rss-counter state mm:000000006034390a type:MM_FILEPAGES val:33 [ 37.352883] BUG: Bad rss-counter state mm:000000006034390a type:MM_ANONPAGES val:22 [ 37.754235] BUG: Bad rss-counter state mm:0000000009faa332 type:MM_FILEPAGES val:33 [ 37.755426] BUG: Bad rss-counter state mm:0000000009faa332 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37164' (ECDSA) to the list of known hosts. 2023/06/20 01:05:42 fuzzer started 2023/06/20 01:05:42 dialing manager at localhost:44161 2023/06/20 01:05:42 checking machine... 2023/06/20 01:05:42 checking revisions... [ 38.301762] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:05:42 testing simple program... [ 38.348237] cgroup: Unknown subsys name 'net' [ 38.382986] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:05:37 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888019e4d600 RCX=ffff88800844f780 RDX=ffffea0000591640 RSI=0000000000000008 RDI=ffffffff818061b3 RBP=0000000000000000 RSP=ffff88801667fc98 R8 =ffff888016459000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000d000c R12=dffffc0000000000 R13=ffff88801667fcd8 R14=ffff88800844f780 R15=ffff88800eb55850 RIP=ffffffff81810196 RFL=00000202 [-------] 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 00007f2a0b237900 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=00007f2a0b7ef0b0 CR3=000000000e4ea000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 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=00007f7191c76ad0 CR3=000000000d496000 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=440b7a079ff5ceb62549704cb6e80016 XMM02=2c67c8bc2e329bc3000000000011d710 XMM03=fb795ef6d657705600000000001240b0 XMM04=2ff924d651d5811700000000000ae988 XMM05=dfcdbad4f1609c370000000000134ce0 XMM06=806171799158d9670000000000134b68 XMM07=e042d86d42eb936e0000000000124388 XMM08=1280a19c840b54e1000000000011d770 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000