[ 24.175462] BUG: Bad rss-counter state mm:00000000d88e172e type:MM_FILEPAGES val:33 [ 24.176358] BUG: Bad rss-counter state mm:00000000d88e172e type:MM_ANONPAGES val:22 [ 24.341947] ================================================================== [ 24.342913] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.343792] Read of size 8 at addr ffff888015f13d08 by task sshd/219 [ 24.344646] [ 24.344853] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.345662] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.346603] Call Trace: [ 24.346904] [ 24.347171] dump_stack_lvl+0x91/0xf0 [ 24.347645] print_report+0xcc/0x620 [ 24.348100] ? __virt_addr_valid+0x102/0x340 [ 24.348619] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.349208] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.349802] kasan_report+0xbe/0xf0 [ 24.350252] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.350844] vma_interval_tree_remove+0xc75/0xec0 [ 24.351419] vma_prepare+0xc54/0x11a0 [ 24.351935] __split_vma+0x5af/0x950 [ 24.352485] ? __pfx___split_vma+0x10/0x10 [ 24.353103] ? find_held_lock+0x2c/0x110 [ 24.353740] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.354401] ? lock_is_held_type+0x9f/0x120 [ 24.355038] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.355751] ? mtree_range_walk+0x632/0x900 [ 24.356403] ? mas_walk+0x5c7/0x7c0 [ 24.356961] do_vmi_munmap+0x1f1/0x2b0 [ 24.357540] mmap_region+0x1f9/0x2660 [ 24.358106] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.358707] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.359547] ? __pfx_lock_acquire+0x10/0x10 [ 24.360215] ? __pfx_mmap_region+0x10/0x10 [ 24.360879] ? security_mmap_addr+0x7d/0xa0 [ 24.361523] ? get_unmapped_area+0x1f5/0x3f0 [ 24.362191] do_mmap+0x854/0xf00 [ 24.362709] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.363290] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.363952] ksys_mmap_pgoff+0x3af/0x500 [ 24.364553] do_syscall_64+0x3f/0x90 [ 24.365114] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.365887] RIP: 0033:0x7f5b9ba0cd82 [ 24.366425] 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 [ 24.368935] RSP: 002b:00007fff696cba18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.370015] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5b9ba0cd82 [ 24.371017] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5b9ae46000 [ 24.372015] RBP: 00007f5b9ae46000 R08: 0000000000000009 R09: 0000000000001000 [ 24.373013] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dae384cf70 [ 24.374034] R13: 00007fff696cba30 R14: 00007fff696cba60 R15: 00007fff696cbdc0 [ 24.375045] [ 24.375387] [ 24.375639] Allocated by task 212: [ 24.376124] kasan_save_stack+0x22/0x50 [ 24.376665] kasan_set_track+0x25/0x30 [ 24.377190] __kasan_slab_alloc+0x59/0x70 [ 24.377756] kmem_cache_alloc+0x16b/0x370 [ 24.378307] vm_area_dup+0x20/0x160 [ 24.378794] __split_vma+0x170/0x950 [ 24.379289] split_vma+0xc6/0x110 [ 24.379760] mprotect_fixup+0x8d2/0xb30 [ 24.380296] do_mprotect_pkey+0x87e/0xd40 [ 24.380849] __x64_sys_mprotect+0x78/0xc0 [ 24.381405] do_syscall_64+0x3f/0x90 [ 24.381921] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.382605] [ 24.382834] Freed by task 212: [ 24.383256] kasan_save_stack+0x22/0x50 [ 24.383792] kasan_set_track+0x25/0x30 [ 24.384320] kasan_save_free_info+0x2b/0x50 [ 24.384902] __kasan_slab_free+0x10a/0x190 [ 24.385507] kmem_cache_free+0x10d/0x4d0 [ 24.386097] rcu_core+0x8c8/0x2860 [ 24.386588] __do_softirq+0x1b7/0x7d4 [ 24.387125] [ 24.387372] Last potentially related work creation: [ 24.388050] kasan_save_stack+0x22/0x50 [ 24.388641] __kasan_record_aux_stack+0x8e/0xa0 [ 24.389311] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.390080] remove_vma+0x139/0x170 [ 24.390610] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.391263] do_vmi_munmap+0x1f1/0x2b0 [ 24.391833] __vm_munmap+0x138/0x3a0 [ 24.392383] __x64_sys_munmap+0x59/0x80 [ 24.392972] do_syscall_64+0x3f/0x90 [ 24.393529] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.394295] [ 24.394546] The buggy address belongs to the object at ffff888015f13cb0 [ 24.394546] which belongs to the cache vm_area_struct of size 168 [ 24.396279] The buggy address is located 88 bytes inside of [ 24.396279] freed 168-byte region [ffff888015f13cb0, ffff888015f13d58) [ 24.397956] [ 24.398207] The buggy address belongs to the physical page: [ 24.398986] page:00000000938a6775 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15f13 [ 24.400282] memcg:ffff88800d735a01 [ 24.400784] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.401608] page_type: 0xffffffff() [ 24.402150] raw: 0100000000000200 ffff8880087a0c80 ffffea0000392a00 dead000000000005 [ 24.403232] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d735a01 [ 24.404301] page dumped because: kasan: bad access detected [ 24.405083] [ 24.405335] Memory state around the buggy address: [ 24.406038] ffff888015f13c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 24.407051] ffff888015f13c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 24.408059] >ffff888015f13d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 24.409061] ^ [ 24.409579] ffff888015f13d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 24.410596] ffff888015f13e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 24.411595] ================================================================== [ 24.412850] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.283029] BUG: Bad rss-counter state mm:000000002e36f63d type:MM_FILEPAGES val:33 [ 26.284022] BUG: Bad rss-counter state mm:000000002e36f63d type:MM_ANONPAGES val:22 [ 26.731894] BUG: Bad rss-counter state mm:00000000abf1ffa5 type:MM_FILEPAGES val:33 [ 26.732813] BUG: Bad rss-counter state mm:00000000abf1ffa5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34513' (ECDSA) to the list of known hosts. 2023/06/20 17:54:55 fuzzer started 2023/06/20 17:54:55 dialing manager at localhost:36067 2023/06/20 17:54:55 checking machine... 2023/06/20 17:54:55 checking revisions... [ 27.466712] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:54:56 testing simple program... [ 27.505022] cgroup: Unknown subsys name 'net' [ 27.541135] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:54:55 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800e611720 RCX=ffff88800844e948 RDX=0000000000000000 RSI=ffff88800dfba260 RDI=ffff88800844e900 RBP=ffff88801c5cfc88 RSP=ffff88801c5cfc00 R8 =00000000000d000c R9 =ffffed10038b9f6e R10=0000000000000003 R11=00000000000d000c R12=ffff88800844f780 R13=ffff88800844e900 R14=ffffea000037ee80 R15=00000000800d000c RIP=ffffffff81805e05 RFL=00000046 [---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 00007f2ac4408900 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=00007f2ac49bd650 CR3=000000000f2e4000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=0000000000000001 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=00007ffc2e518278 CR3=000000000f164000 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=2035353a34353a3731203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a34353a3731203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000