syzkaller login: [ 45.699931] BUG: Bad rss-counter state mm:000000007e700cd6 type:MM_FILEPAGES val:33 [ 45.700576] BUG: Bad rss-counter state mm:000000007e700cd6 type:MM_ANONPAGES val:22 [ 45.926336] ================================================================== [ 45.927033] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 45.935600] Read of size 8 at addr ffff88800f00b3f8 by task sshd/221 [ 45.936163] [ 45.936320] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 45.936941] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 45.937645] Call Trace: [ 45.937884] [ 45.938110] dump_stack_lvl+0x91/0xf0 [ 45.938470] print_report+0xcc/0x620 [ 45.938816] ? __virt_addr_valid+0x102/0x340 [ 45.943272] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.943730] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.944186] kasan_report+0xbe/0xf0 [ 45.944538] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.944985] vma_interval_tree_remove+0xc75/0xec0 [ 45.945428] vma_prepare+0xc54/0x11a0 [ 45.945779] __split_vma+0x5af/0x950 [ 45.946123] ? __pfx___split_vma+0x10/0x10 [ 45.946497] ? find_held_lock+0x2c/0x110 [ 45.946884] do_vmi_align_munmap+0x2ba/0x11f0 [ 45.947367] ? lock_is_held_type+0x9f/0x120 [ 45.947752] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 45.948190] ? mtree_range_walk+0x632/0x900 [ 45.948594] ? mas_walk+0x5c7/0x7c0 [ 45.948935] do_vmi_munmap+0x1f1/0x2b0 [ 45.949294] mmap_region+0x1f9/0x2660 [ 45.949647] ? vm_mmap_pgoff+0x15c/0x3a0 [ 45.950052] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 45.950573] ? __pfx_lock_acquire+0x10/0x10 [ 45.950965] ? __pfx_mmap_region+0x10/0x10 [ 45.951462] ? security_mmap_addr+0x7d/0xa0 [ 45.951856] ? get_unmapped_area+0x1f5/0x3f0 [ 45.952259] do_mmap+0x854/0xf00 [ 45.952578] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.952942] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 45.953348] ksys_mmap_pgoff+0x3af/0x500 [ 45.953721] do_syscall_64+0x3f/0x90 [ 45.954092] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.954554] RIP: 0033:0x7fdbf72d6d82 [ 45.954895] 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 [ 45.956488] RSP: 002b:00007ffc9f2acc08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 45.957117] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdbf72d6d82 [ 45.957686] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdbf6710000 [ 45.958243] RBP: 00007fdbf6710000 R08: 0000000000000009 R09: 0000000000001000 [ 45.958800] R10: 0000000000000812 R11: 0000000000000206 R12: 00005650f682dec0 [ 45.959403] R13: 00007ffc9f2acc20 R14: 00007ffc9f2acc50 R15: 00007ffc9f2acfb0 [ 45.960040] [ 45.960276] [ 45.960434] Allocated by task 212: [ 45.960759] kasan_save_stack+0x22/0x50 [ 45.961143] kasan_set_track+0x25/0x30 [ 45.961505] __kasan_slab_alloc+0x59/0x70 [ 45.961889] kmem_cache_alloc+0x16b/0x370 [ 45.962306] vm_area_dup+0x20/0x160 [ 45.962646] __split_vma+0x170/0x950 [ 45.962992] split_vma+0xc6/0x110 [ 45.963348] mprotect_fixup+0x8d2/0xb30 [ 45.963723] do_mprotect_pkey+0x87e/0xd40 [ 45.964104] __x64_sys_mprotect+0x78/0xc0 [ 45.964488] do_syscall_64+0x3f/0x90 [ 45.964833] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.965308] [ 45.965467] Freed by task 212: [ 45.965747] kasan_save_stack+0x22/0x50 [ 45.966109] kasan_set_track+0x25/0x30 [ 45.966464] kasan_save_free_info+0x2b/0x50 [ 45.966867] __kasan_slab_free+0x10a/0x190 [ 45.967266] kmem_cache_free+0x10d/0x4d0 [ 45.967620] rcu_core+0x8c8/0x2860 [ 45.967904] __do_softirq+0x1b7/0x7d4 [ 45.968207] [ 45.968345] Last potentially related work creation: [ 45.968748] kasan_save_stack+0x22/0x50 [ 45.969129] __kasan_record_aux_stack+0x8e/0xa0 [ 45.969553] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.970006] remove_vma+0x139/0x170 [ 45.970330] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.970733] do_vmi_munmap+0x1f1/0x2b0 [ 45.971091] __vm_munmap+0x138/0x3a0 [ 45.971447] __x64_sys_munmap+0x59/0x80 [ 45.971763] do_syscall_64+0x3f/0x90 [ 45.972097] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.972498] [ 45.972635] The buggy address belongs to the object at ffff88800f00b3a0 [ 45.972635] which belongs to the cache vm_area_struct of size 168 [ 45.973649] The buggy address is located 88 bytes inside of [ 45.973649] freed 168-byte region [ffff88800f00b3a0, ffff88800f00b448) [ 45.974692] [ 45.974850] The buggy address belongs to the physical page: [ 45.975377] page:0000000017a0c4a2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf00b [ 45.976126] memcg:ffff88800f009101 [ 45.976445] flags: 0x100000000000200(slab|node=0|zone=1) [ 45.976920] page_type: 0xffffffff() [ 45.977275] raw: 0100000000000200 ffff88800879fc80 ffffea000038b380 dead000000000004 [ 45.977958] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f009101 [ 45.978646] page dumped because: kasan: bad access detected [ 45.979142] [ 45.979318] Memory state around the buggy address: [ 45.979764] ffff88800f00b280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 45.980463] ffff88800f00b300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 45.981117] >ffff88800f00b380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 45.981765] ^ [ 45.982403] ffff88800f00b400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 45.983050] ffff88800f00b480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 45.983687] ================================================================== [ 45.984557] Disabling lock debugging due to kernel taint [ 48.544455] BUG: Bad rss-counter state mm:00000000380d1c8b type:MM_FILEPAGES val:33 [ 48.545161] BUG: Bad rss-counter state mm:00000000380d1c8b type:MM_ANONPAGES val:22 [ 49.351814] BUG: Bad rss-counter state mm:00000000e6f503d8 type:MM_FILEPAGES val:33 [ 49.352419] BUG: Bad rss-counter state mm:00000000e6f503d8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39380' (ECDSA) to the list of known hosts. 2023/06/20 09:57:26 fuzzer started 2023/06/20 09:57:26 dialing manager at localhost:44161 2023/06/20 09:57:26 checking machine... 2023/06/20 09:57:26 checking revisions... [ 50.324291] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:57:27 testing simple program... [ 50.389819] cgroup: Unknown subsys name 'net' [ 50.468784] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:57:11 Registers: info registers vcpu 0 RAX=000055a55d3f4fd0 RBX=000055a55d3b5a10 RCX=000000000065676e RDX=00007ffd471301f0 RSI=000055a55d3f50d0 RDI=000055a55d3cb5a8 RBP=000055a55d3f50d0 RSP=00007ffd471301d8 R8 =000055a55d3f4fd0 R9 =00007ffd4713048c R10=0000000000000026 R11=0000000000000246 R12=0000000000000000 R13=00007ffd4713048d R14=000055a55d3b5a28 R15=000055a55d3f4fd0 RIP=000055a55c6278a3 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f1ee3b7f8c0 00000000 00000000 GS =0000 0000000000000000 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=00007f76b66a16f8 CR3=000000000d8c8000 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=000000000000000000ff000000000000 XMM02=0000ff00000000000000000000000000 XMM03=7665642f3d485441505645440065676e XMM04=0000000000000001000055a55d3d70d0 XMM05=000055a55d3ca030000055a55d3d91b0 XMM06=00000000000000000000000400000003 XMM07=00000000000000000000000000000000 XMM08=45440065676e6168633d4e4f49544341 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffed100305fef7 RBX=0000000000092cc0 RCX=ffffffff812d869a RDX=0000000000000000 RSI=ffffffff81807d9f RDI=ffffffff856c1d40 RBP=1ffff1100305fef7 RSP=ffff8880182ff7a8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff856c1d40 R13=ffffffff81807d9f R14=0000000000000000 R15=ffffffff818470dc RIP=ffffffff812d8652 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 00007f76b66a1900 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=00007fa903bbf060 CR3=0000000016d96000 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=ffffffff0000000f000055a55d3b2080 XMM02=ffffff0f0e0d0c0b0a09080706050403 XMM03=696e656420737365636341002f737973 XMM04=4c414954494e495f4345535500383736 XMM05=6765723a6d726f6674616c703d534149 XMM06=006d726f6674616c703d4d4554535953 XMM07=2f6d726f6674616c702f736563697665 XMM08=3a56000a73253a51000a73253a47000a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000