syzkaller login: [ 37.750570] BUG: Bad rss-counter state mm:00000000216a8606 type:MM_FILEPAGES val:33 [ 37.752023] BUG: Bad rss-counter state mm:00000000216a8606 type:MM_ANONPAGES val:22 [ 37.923095] ================================================================== [ 37.923992] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.924952] Read of size 8 at addr ffff88800f46c058 by task sshd/220 [ 37.925710] [ 37.925931] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.926903] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.927869] Call Trace: [ 37.928188] [ 37.928492] dump_stack_lvl+0x91/0xf0 [ 37.928987] print_report+0xcc/0x620 [ 37.929467] ? __virt_addr_valid+0x102/0x340 [ 37.930015] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.930626] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.931245] kasan_report+0xbe/0xf0 [ 37.931726] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.932338] vma_interval_tree_remove+0xc75/0xec0 [ 37.932965] vma_prepare+0xc54/0x11a0 [ 37.933463] __split_vma+0x5af/0x950 [ 37.933959] ? __pfx___split_vma+0x10/0x10 [ 37.934501] ? find_held_lock+0x2c/0x110 [ 37.935042] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.935630] ? lock_is_held_type+0x9f/0x120 [ 37.936182] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.936824] ? mtree_range_walk+0x632/0x900 [ 37.937397] ? mas_walk+0x5c7/0x7c0 [ 37.937894] do_vmi_munmap+0x1f1/0x2b0 [ 37.938402] mmap_region+0x1f9/0x2660 [ 37.938901] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.939428] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.940165] ? __pfx_lock_acquire+0x10/0x10 [ 37.940714] ? __pfx_mmap_region+0x10/0x10 [ 37.941275] ? security_mmap_addr+0x7d/0xa0 [ 37.941828] ? get_unmapped_area+0x1f5/0x3f0 [ 37.942402] do_mmap+0x854/0xf00 [ 37.942860] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.943372] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.943957] ksys_mmap_pgoff+0x3af/0x500 [ 37.944482] do_syscall_64+0x3f/0x90 [ 37.945013] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.945678] RIP: 0033:0x7f6040bb5d82 [ 37.946152] 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 [ 37.948377] RSP: 002b:00007ffc2f4fb528 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.949338] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6040bb5d82 [ 37.950226] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f603ffef000 [ 37.951110] RBP: 00007f603ffef000 R08: 0000000000000009 R09: 0000000000001000 [ 37.951986] R10: 0000000000000812 R11: 0000000000000206 R12: 000056344c8a2ec0 [ 37.952874] R13: 00007ffc2f4fb540 R14: 00007ffc2f4fb570 R15: 00007ffc2f4fb8d0 [ 37.953777] [ 37.954089] [ 37.954313] Allocated by task 213: [ 37.954764] kasan_save_stack+0x22/0x50 [ 37.955290] kasan_set_track+0x25/0x30 [ 37.955801] __kasan_slab_alloc+0x59/0x70 [ 37.956351] kmem_cache_alloc+0x16b/0x370 [ 37.956908] vm_area_dup+0x20/0x160 [ 37.957381] __split_vma+0x170/0x950 [ 37.957863] split_vma+0xc6/0x110 [ 37.958315] mprotect_fixup+0x8d2/0xb30 [ 37.958831] do_mprotect_pkey+0x87e/0xd40 [ 37.959372] __x64_sys_mprotect+0x78/0xc0 [ 37.959913] do_syscall_64+0x3f/0x90 [ 37.960399] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.961067] [ 37.961291] Freed by task 203: [ 37.961699] kasan_save_stack+0x22/0x50 [ 37.962218] kasan_set_track+0x25/0x30 [ 37.962728] kasan_save_free_info+0x2b/0x50 [ 37.963279] __kasan_slab_free+0x10a/0x190 [ 37.963837] kmem_cache_free+0x10d/0x4d0 [ 37.964360] rcu_core+0x8c8/0x2860 [ 37.964823] __do_softirq+0x1b7/0x7d4 [ 37.965323] [ 37.965549] Last potentially related work creation: [ 37.966166] kasan_save_stack+0x22/0x50 [ 37.966682] __kasan_record_aux_stack+0x8e/0xa0 [ 37.967275] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.967939] remove_vma+0x139/0x170 [ 37.968407] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.969003] do_vmi_munmap+0x1f1/0x2b0 [ 37.969507] __vm_munmap+0x138/0x3a0 [ 37.969989] __x64_sys_munmap+0x59/0x80 [ 37.970507] do_syscall_64+0x3f/0x90 [ 37.971002] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.971637] [ 37.971850] The buggy address belongs to the object at ffff88800f46c000 [ 37.971850] which belongs to the cache vm_area_struct of size 168 [ 37.973320] The buggy address is located 88 bytes inside of [ 37.973320] freed 168-byte region [ffff88800f46c000, ffff88800f46c0a8) [ 37.974764] [ 37.974976] The buggy address belongs to the physical page: [ 37.975664] page:0000000091a37a94 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf46c [ 37.976771] memcg:ffff888015948701 [ 37.977225] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.977902] page_type: 0xffffffff() [ 37.978370] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 37.979330] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015948701 [ 37.980269] page dumped because: kasan: bad access detected [ 37.980981] [ 37.981211] Memory state around the buggy address: [ 37.981828] ffff88800f46bf00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 37.982737] ffff88800f46bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 37.983654] >ffff88800f46c000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.984556] ^ [ 37.985325] ffff88800f46c080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 37.986210] ffff88800f46c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.987087] ================================================================== [ 37.988218] Disabling lock debugging due to kernel taint [ 39.933367] BUG: Bad rss-counter state mm:0000000025f624e9 type:MM_FILEPAGES val:32 [ 39.934930] BUG: Bad rss-counter state mm:0000000025f624e9 type:MM_ANONPAGES val:22 [ 40.496918] BUG: Bad rss-counter state mm:0000000010be7bbe type:MM_FILEPAGES val:33 [ 40.498188] BUG: Bad rss-counter state mm:0000000010be7bbe type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38943' (ECDSA) to the list of known hosts. 2023/06/19 17:49:10 fuzzer started 2023/06/19 17:49:10 dialing manager at localhost:44161 2023/06/19 17:49:10 checking machine... 2023/06/19 17:49:10 checking revisions... [ 41.141397] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:49:10 testing simple program... [ 41.195451] cgroup: Unknown subsys name 'net' [ 41.234556] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:49:03 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000008000 RDX=0000000000000004 RSI=ffff88800f1cfc48 RDI=ffffffff856f0b20 RBP=0000000000000000 RSP=ffff88800f1cfb00 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffff88800f1cfc48 R13=dffffc0000000000 R14=0000000000008000 R15=ffff88800f1cfdf0 RIP=ffffffff81895fc2 RFL=00000293 [--S-A-C] 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 00007f6b370f6900 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=00007f6b376ab650 CR3=000000000ec70000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=000000000cfbf067 RCX=ffffffff8175d228 RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000007 RBP=ffff88800e0abc78 RSP=ffff8880146ffae8 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6c88 R12=ffff88800cfbf4b8 R13=1ffff110028dff62 R14=dffffc0000000000 R15=00007f3f71e97000 RIP=ffffffff814c01d0 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f3f72a9d900 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=00007f3f71e97bc0 CR3=000000000cac4000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=e2d318330817dfcd00000000000ae988 XMM05=5d7b83abba406c810000000000134a48 XMM06=4fda316b135da52b0000000000133838 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000