[ 33.014246] BUG: Bad rss-counter state mm:00000000c5df31e1 type:MM_FILEPAGES val:33 [ 33.015431] BUG: Bad rss-counter state mm:00000000c5df31e1 type:MM_ANONPAGES val:22 [ 33.179639] ================================================================== [ 33.180586] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.181517] Read of size 8 at addr ffff88800fbcb798 by task sshd/219 [ 33.182306] [ 33.182616] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.183475] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.184451] Call Trace: [ 33.184770] [ 33.185052] dump_stack_lvl+0x91/0xf0 [ 33.185545] print_report+0xcc/0x620 [ 33.186056] ? __virt_addr_valid+0x102/0x340 [ 33.186602] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.187225] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.187857] kasan_report+0xbe/0xf0 [ 33.188332] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.188968] vma_interval_tree_remove+0xc75/0xec0 [ 33.189583] vma_prepare+0xc54/0x11a0 [ 33.190083] __split_vma+0x5af/0x950 [ 33.190553] ? __pfx___split_vma+0x10/0x10 [ 33.191076] ? find_held_lock+0x2c/0x110 [ 33.191603] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.192165] ? lock_is_held_type+0x9f/0x120 [ 33.192718] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.193326] ? mtree_range_walk+0x632/0x900 [ 33.193884] ? mas_walk+0x5c7/0x7c0 [ 33.194364] do_vmi_munmap+0x1f1/0x2b0 [ 33.194890] mmap_region+0x1f9/0x2660 [ 33.195404] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.195942] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.196689] ? __pfx_lock_acquire+0x10/0x10 [ 33.197251] ? __pfx_mmap_region+0x10/0x10 [ 33.197825] ? security_mmap_addr+0x7d/0xa0 [ 33.198390] ? get_unmapped_area+0x1f5/0x3f0 [ 33.198977] do_mmap+0x854/0xf00 [ 33.199428] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.199934] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.200513] ksys_mmap_pgoff+0x3af/0x500 [ 33.201032] do_syscall_64+0x3f/0x90 [ 33.201523] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.202192] RIP: 0033:0x7f32849b4d82 [ 33.202686] 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 [ 33.204878] RSP: 002b:00007fff5b10a9e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.205818] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f32849b4d82 [ 33.206692] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3283dee000 [ 33.207543] RBP: 00007f3283dee000 R08: 0000000000000009 R09: 0000000000001000 [ 33.208390] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c24eeb1d90 [ 33.209256] R13: 00007fff5b10aa00 R14: 00007fff5b10aa30 R15: 00007fff5b10ad90 [ 33.210137] [ 33.210435] [ 33.210651] Allocated by task 211: [ 33.211096] kasan_save_stack+0x22/0x50 [ 33.211655] kasan_set_track+0x25/0x30 [ 33.212178] __kasan_slab_alloc+0x59/0x70 [ 33.212715] kmem_cache_alloc+0x16b/0x370 [ 33.213236] vm_area_dup+0x20/0x160 [ 33.213711] __split_vma+0x170/0x950 [ 33.214191] split_vma+0xc6/0x110 [ 33.214649] mprotect_fixup+0x8d2/0xb30 [ 33.215163] do_mprotect_pkey+0x87e/0xd40 [ 33.215693] __x64_sys_mprotect+0x78/0xc0 [ 33.216226] do_syscall_64+0x3f/0x90 [ 33.216727] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.217392] [ 33.217617] Freed by task 211: [ 33.218030] kasan_save_stack+0x22/0x50 [ 33.218569] kasan_set_track+0x25/0x30 [ 33.219078] kasan_save_free_info+0x2b/0x50 [ 33.219627] __kasan_slab_free+0x10a/0x190 [ 33.220167] kmem_cache_free+0x10d/0x4d0 [ 33.220679] rcu_core+0x8c8/0x2860 [ 33.221128] __do_softirq+0x1b7/0x7d4 [ 33.221626] [ 33.221845] Last potentially related work creation: [ 33.222434] kasan_save_stack+0x22/0x50 [ 33.222947] __kasan_record_aux_stack+0x8e/0xa0 [ 33.223526] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.224211] remove_vma+0x139/0x170 [ 33.224681] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.225258] do_vmi_munmap+0x1f1/0x2b0 [ 33.225769] __vm_munmap+0x138/0x3a0 [ 33.226246] __x64_sys_munmap+0x59/0x80 [ 33.226755] do_syscall_64+0x3f/0x90 [ 33.227241] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.227913] [ 33.228138] Second to last potentially related work creation: [ 33.228846] kasan_save_stack+0x22/0x50 [ 33.229362] __kasan_record_aux_stack+0x8e/0xa0 [ 33.230014] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.230682] remove_vma+0x139/0x170 [ 33.231153] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.231720] do_vmi_munmap+0x1f1/0x2b0 [ 33.232209] mmap_region+0x1f9/0x2660 [ 33.232686] do_mmap+0x854/0xf00 [ 33.233131] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.233625] ksys_mmap_pgoff+0x7d/0x500 [ 33.234135] do_syscall_64+0x3f/0x90 [ 33.234614] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.235274] [ 33.235492] The buggy address belongs to the object at ffff88800fbcb740 [ 33.235492] which belongs to the cache vm_area_struct of size 168 [ 33.236979] The buggy address is located 88 bytes inside of [ 33.236979] freed 168-byte region [ffff88800fbcb740, ffff88800fbcb7e8) [ 33.238400] [ 33.238620] The buggy address belongs to the physical page: [ 33.239280] page:000000008e63d445 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfbcb [ 33.240404] memcg:ffff88800ee7b201 [ 33.240850] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.241502] page_type: 0xffffffff() [ 33.241965] raw: 0100000000000200 ffff88800879fc80 ffffea0000380e80 dead000000000004 [ 33.242898] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee7b201 [ 33.243817] page dumped because: kasan: bad access detected [ 33.244488] [ 33.244708] Memory state around the buggy address: [ 33.245296] ffff88800fbcb680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.246183] ffff88800fbcb700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 33.247050] >ffff88800fbcb780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 33.247910] ^ [ 33.248408] ffff88800fbcb800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 33.249278] ffff88800fbcb880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 33.250159] ================================================================== [ 33.251280] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 35.169112] BUG: Bad rss-counter state mm:00000000b957304f type:MM_FILEPAGES val:33 [ 35.170178] BUG: Bad rss-counter state mm:00000000b957304f type:MM_ANONPAGES val:22 [ 35.648483] BUG: Bad rss-counter state mm:00000000f46dd0f7 type:MM_FILEPAGES val:33 [ 35.649460] BUG: Bad rss-counter state mm:00000000f46dd0f7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11811' (ECDSA) to the list of known hosts. 2023/06/19 22:25:32 fuzzer started 2023/06/19 22:25:32 dialing manager at localhost:44161 2023/06/19 22:25:32 checking machine... 2023/06/19 22:25:32 checking revisions... [ 36.374052] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:25:32 testing simple program... [ 36.416907] cgroup: Unknown subsys name 'net' [ 36.485871] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:25:31 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000255 RCX=0000000000000000 RDX=ffff888016bd1b40 RSI=ffffffff81716aee RDI=ffffffff85d3bed0 RBP=ffff88801810ff58 RSP=ffff88801810fed0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000006 R13=00007ffe218faccc R14=ffff88800cade0e8 R15=ffff88800845ae40 RIP=ffffffff814c07eb 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fbe2886f900 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=00007ffe218faccc CR3=000000001c87a000 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=00000000000000000000000000000000 XMM01=00000000000000000000000000000000 XMM02=000000000000000000000000000000ff XMM03=5815060b050bff0c539a801a55adb6f0 XMM04=12475edc6e91f3c472905ba6ccb3d6f9 XMM05=000000000000000000000000000000ff XMM06=1215060b050bf30c53905b1a55adb6f0 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 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=00007f534db0b870 CR3=000000000d710000 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=e1013022c7e23aa9ea48b3f53b9566d5 XMM02=2c67c8bc2e329bc3000000000011de90 XMM03=fb795ef6d65770560000000000123750 XMM04=9ebed972762ea04c00000000000ae988 XMM05=f24ef3950ca4f8a10000000000135df8 XMM06=806171799158d9670000000000134b28 XMM07=e042d86d42eb936e00000000001242b0 XMM08=43875339af624da4000000000011def0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000