[ 68.186473] BUG: Bad rss-counter state mm:0000000010fbfcbe type:MM_FILEPAGES val:33 [ 68.187362] BUG: Bad rss-counter state mm:0000000010fbfcbe type:MM_ANONPAGES val:22 [ 68.307478] ================================================================== [ 68.308175] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 68.308894] Read of size 8 at addr ffff88800c7a4880 by task sshd/225 [ 68.309420] [ 68.309571] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 68.310191] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 68.310866] Call Trace: [ 68.311092] [ 68.311291] dump_stack_lvl+0x91/0xf0 [ 68.311881] print_report+0xcc/0x620 [ 68.312223] ? __virt_addr_valid+0x102/0x340 [ 68.312609] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.313088] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.313515] kasan_report+0xbe/0xf0 [ 68.313847] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.314266] vma_interval_tree_remove+0xc75/0xec0 [ 68.314681] vma_prepare+0xc54/0x11a0 [ 68.315023] __split_vma+0x5af/0x950 [ 68.315352] ? __pfx___split_vma+0x10/0x10 [ 68.315716] ? find_held_lock+0x2c/0x110 [ 68.316071] do_vmi_align_munmap+0x2ba/0x11f0 [ 68.316457] ? lock_is_held_type+0x9f/0x120 [ 68.316846] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 68.317261] ? mtree_range_walk+0x632/0x900 [ 68.317648] ? mas_walk+0x5c7/0x7c0 [ 68.317973] do_vmi_munmap+0x1f1/0x2b0 [ 68.318309] mmap_region+0x1f9/0x2660 [ 68.318643] ? vm_mmap_pgoff+0x15c/0x3a0 [ 68.319023] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 68.319525] ? __pfx_lock_acquire+0x10/0x10 [ 68.319913] ? __pfx_mmap_region+0x10/0x10 [ 68.320306] ? security_mmap_addr+0x7d/0xa0 [ 68.320674] ? get_unmapped_area+0x1f5/0x3f0 [ 68.321112] do_mmap+0x854/0xf00 [ 68.321420] vm_mmap_pgoff+0x1a6/0x3a0 [ 68.321765] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 68.322150] ksys_mmap_pgoff+0x3af/0x500 [ 68.322505] do_syscall_64+0x3f/0x90 [ 68.322836] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.323282] RIP: 0033:0x7fb488163d82 [ 68.323597] 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 [ 68.325126] RSP: 002b:00007ffdffb4a7a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 68.325749] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb488163d82 [ 68.326321] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb48759d000 [ 68.326904] RBP: 00007fb48759d000 R08: 0000000000000009 R09: 0000000000001000 [ 68.327484] R10: 0000000000000812 R11: 0000000000000206 R12: 000056032b5f5f70 [ 68.328070] R13: 00007ffdffb4a7c0 R14: 00007ffdffb4a7f0 R15: 00007ffdffb4ab50 [ 68.328656] [ 68.328872] [ 68.329027] Allocated by task 218: [ 68.329321] kasan_save_stack+0x22/0x50 [ 68.329678] kasan_set_track+0x25/0x30 [ 68.330021] __kasan_slab_alloc+0x59/0x70 [ 68.330379] kmem_cache_alloc+0x16b/0x370 [ 68.330730] vm_area_dup+0x20/0x160 [ 68.331039] __split_vma+0x170/0x950 [ 68.331362] split_vma+0xc6/0x110 [ 68.331672] mprotect_fixup+0x8d2/0xb30 [ 68.332014] do_mprotect_pkey+0x87e/0xd40 [ 68.332371] __x64_sys_mprotect+0x78/0xc0 [ 68.332787] do_syscall_64+0x3f/0x90 [ 68.333131] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.333574] [ 68.333730] Freed by task 218: [ 68.334009] kasan_save_stack+0x22/0x50 [ 68.334355] kasan_set_track+0x25/0x30 [ 68.334696] kasan_save_free_info+0x2b/0x50 [ 68.335067] __kasan_slab_free+0x10a/0x190 [ 68.335433] kmem_cache_free+0x10d/0x4d0 [ 68.335792] rcu_core+0x8c8/0x2860 [ 68.336104] __do_softirq+0x1b7/0x7d4 [ 68.336442] [ 68.336593] Last potentially related work creation: [ 68.337031] kasan_save_stack+0x22/0x50 [ 68.337381] __kasan_record_aux_stack+0x8e/0xa0 [ 68.337803] __call_rcu_common.constprop.0+0x6a/0xb90 [ 68.338244] remove_vma+0x139/0x170 [ 68.338557] do_vmi_align_munmap+0xd4a/0x11f0 [ 68.338942] do_vmi_munmap+0x1f1/0x2b0 [ 68.339278] __vm_munmap+0x138/0x3a0 [ 68.339610] __x64_sys_munmap+0x59/0x80 [ 68.339956] do_syscall_64+0x3f/0x90 [ 68.340286] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.340794] [ 68.340945] Second to last potentially related work creation: [ 68.341411] kasan_save_stack+0x22/0x50 [ 68.341757] __kasan_record_aux_stack+0x8e/0xa0 [ 68.342154] __call_rcu_common.constprop.0+0x6a/0xb90 [ 68.342606] remove_vma+0x139/0x170 [ 68.342928] do_vmi_align_munmap+0xd4a/0x11f0 [ 68.343317] do_vmi_munmap+0x1f1/0x2b0 [ 68.343652] mmap_region+0x1f9/0x2660 [ 68.343987] do_mmap+0x854/0xf00 [ 68.344284] vm_mmap_pgoff+0x1a6/0x3a0 [ 68.344621] ksys_mmap_pgoff+0x3af/0x500 [ 68.345004] do_syscall_64+0x3f/0x90 [ 68.345333] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.345781] [ 68.345939] The buggy address belongs to the object at ffff88800c7a4828 [ 68.345939] which belongs to the cache vm_area_struct of size 168 [ 68.346945] The buggy address is located 88 bytes inside of [ 68.346945] freed 168-byte region [ffff88800c7a4828, ffff88800c7a48d0) [ 68.347906] [ 68.348060] The buggy address belongs to the physical page: [ 68.348513] page:000000005a9a7b40 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc7a4 [ 68.349302] memcg:ffff88800cbb7a01 [ 68.349599] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 68.350117] page_type: 0xffffffff() [ 68.350434] raw: 0100000000000200 ffff88800879fc80 ffffea00003be8c0 0000000000000005 [ 68.351063] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cbb7a01 [ 68.351693] page dumped because: kasan: bad access detected [ 68.352146] [ 68.352296] Memory state around the buggy address: [ 68.352722] ffff88800c7a4780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 68.353433] ffff88800c7a4800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 68.354023] >ffff88800c7a4880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 68.354617] ^ [ 68.354903] ffff88800c7a4900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 68.355473] ffff88800c7a4980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 68.356070] ================================================================== [ 68.356803] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 69.804462] BUG: Bad rss-counter state mm:00000000a5ac113d type:MM_FILEPAGES val:33 [ 69.805241] BUG: Bad rss-counter state mm:00000000a5ac113d type:MM_ANONPAGES val:22 [ 70.153550] BUG: Bad rss-counter state mm:000000006f1df9b6 type:MM_FILEPAGES val:33 [ 70.154233] BUG: Bad rss-counter state mm:000000006f1df9b6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23086' (ECDSA) to the list of known hosts. 2023/06/20 09:20:18 fuzzer started 2023/06/20 09:20:18 dialing manager at localhost:44161 2023/06/20 09:20:18 checking machine... 2023/06/20 09:20:18 checking revisions... [ 70.680522] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:20:18 testing simple program... [ 70.705290] cgroup: Unknown subsys name 'net' [ 70.747571] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:20:11 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff110011aff3a RSI=ffffffff8180995d RDI=ffff888008d7fa40 RBP=ffff888008d7fa10 RSP=ffff888008d7f970 R8 =0000000000000001 R9 =ffff888008d7f9b8 R10=0000000000038001 R11=0000000000020dae R12=ffff888008d7fa40 R13=0000000000000000 R14=ffff888008d70000 R15=ffff88800df90c60 RIP=ffffffff813ad42e RFL=00000282 [--S----] 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=00007fd7e773cea0 CR3=000000000b980000 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=6b118734e31159ad6b4a6a128eaa88b9 XMM02=000000000011ead8ec2efd57dc4c00df XMM03=0000000000124d080444fed05bef22ea XMM04=eb725989bfeee23b00000000000ae988 XMM05=61072706c7725e6400000000001360e0 XMM06=ae9b264101391a5b0000000000135768 XMM07=e042d86d42eb936e0000000000124fe0 XMM08=0444fed05bef22ea000000000011eb38 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88801b7473b8 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88801b747301 RSI=ffff88801b747340 RDI=ffff88801b747340 RBP=ffff88801b746f90 RSP=ffff88801b746ec8 R8 =0000000000000001 R9 =ffff88801b746f78 R10=0000000000038001 R11=0000000000021edf R12=ffff88801b746f98 R13=ffff88801b746f80 R14=ffff88801b747340 R15=ffff88801b746f38 RIP=ffffffff81131236 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 00007f6928698900 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=00007f6928662008 CR3=000000001a138000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000