syzkaller login: [ 31.739875] BUG: Bad rss-counter state mm:00000000eb9aec88 type:MM_FILEPAGES val:33 [ 31.741411] BUG: Bad rss-counter state mm:00000000eb9aec88 type:MM_ANONPAGES val:22 [ 31.853007] ================================================================== [ 31.854068] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.855169] Read of size 8 at addr ffff8880099fddf0 by task sshd/221 [ 31.856136] [ 31.856425] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.857523] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.858667] Call Trace: [ 31.859069] [ 31.859406] dump_stack_lvl+0x91/0xf0 [ 31.859846] print_report+0xcc/0x620 [ 31.860248] ? __virt_addr_valid+0x102/0x340 [ 31.860710] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.861223] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.861740] kasan_report+0xbe/0xf0 [ 31.862134] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.862650] vma_interval_tree_remove+0xc75/0xec0 [ 31.863150] vma_prepare+0xc54/0x11a0 [ 31.863556] __split_vma+0x5af/0x950 [ 31.863959] ? __pfx___split_vma+0x10/0x10 [ 31.864400] ? find_held_lock+0x2c/0x110 [ 31.864837] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.865312] ? lock_is_held_type+0x9f/0x120 [ 31.865764] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.866263] ? mtree_range_walk+0x632/0x900 [ 31.866723] ? mas_walk+0x5c7/0x7c0 [ 31.867114] do_vmi_munmap+0x1f1/0x2b0 [ 31.867526] mmap_region+0x1f9/0x2660 [ 31.867944] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.868366] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.868960] ? __pfx_lock_acquire+0x10/0x10 [ 31.869410] ? __pfx_mmap_region+0x10/0x10 [ 31.869852] ? security_mmap_addr+0x7d/0xa0 [ 31.870302] ? get_unmapped_area+0x1f5/0x3f0 [ 31.870760] do_mmap+0x854/0xf00 [ 31.871122] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.871533] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.872002] ksys_mmap_pgoff+0x3af/0x500 [ 31.872419] do_syscall_64+0x3f/0x90 [ 31.872825] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.873363] RIP: 0033:0x7fb643828d82 [ 31.873747] 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 [ 31.875502] RSP: 002b:00007fffcd2ff428 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.876270] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb643828d82 [ 31.876984] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb642c62000 [ 31.877695] RBP: 00007fb642c62000 R08: 0000000000000009 R09: 0000000000001000 [ 31.878403] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c7b35d5b20 [ 31.879121] R13: 00007fffcd2ff440 R14: 00007fffcd2ff470 R15: 00007fffcd2ff7d0 [ 31.879848] [ 31.880087] [ 31.880269] Allocated by task 214: [ 31.880626] kasan_save_stack+0x22/0x50 [ 31.881041] kasan_set_track+0x25/0x30 [ 31.881449] __kasan_slab_alloc+0x59/0x70 [ 31.881886] kmem_cache_alloc+0x16b/0x370 [ 31.882316] vm_area_dup+0x20/0x160 [ 31.882701] __split_vma+0x170/0x950 [ 31.883090] split_vma+0xc6/0x110 [ 31.883456] mprotect_fixup+0x8d2/0xb30 [ 31.883886] do_mprotect_pkey+0x87e/0xd40 [ 31.884333] __x64_sys_mprotect+0x78/0xc0 [ 31.884758] do_syscall_64+0x3f/0x90 [ 31.885148] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.885688] [ 31.885867] Freed by task 214: [ 31.886189] kasan_save_stack+0x22/0x50 [ 31.886611] kasan_set_track+0x25/0x30 [ 31.887025] kasan_save_free_info+0x2b/0x50 [ 31.887462] __kasan_slab_free+0x10a/0x190 [ 31.887914] kmem_cache_free+0x10d/0x4d0 [ 31.888328] rcu_core+0x8c8/0x2860 [ 31.888700] __do_softirq+0x1b7/0x7d4 [ 31.889094] [ 31.889272] Last potentially related work creation: [ 31.889771] kasan_save_stack+0x22/0x50 [ 31.890193] __kasan_record_aux_stack+0x8e/0xa0 [ 31.890669] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.891201] remove_vma+0x139/0x170 [ 31.891576] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.892048] do_vmi_munmap+0x1f1/0x2b0 [ 31.892447] __vm_munmap+0x138/0x3a0 [ 31.892836] __x64_sys_munmap+0x59/0x80 [ 31.893250] do_syscall_64+0x3f/0x90 [ 31.893651] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.894182] [ 31.894363] The buggy address belongs to the object at ffff8880099fdd98 [ 31.894363] which belongs to the cache vm_area_struct of size 168 [ 31.895599] The buggy address is located 88 bytes inside of [ 31.895599] freed 168-byte region [ffff8880099fdd98, ffff8880099fde40) [ 31.896789] [ 31.896971] The buggy address belongs to the physical page: [ 31.897575] page:00000000e17a4c62 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x99fd [ 31.898486] memcg:ffff88800eb4f101 [ 31.898853] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.899406] page_type: 0xffffffff() [ 31.899795] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.900578] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb4f101 [ 31.901348] page dumped because: kasan: bad access detected [ 31.901921] [ 31.902110] Memory state around the buggy address: [ 31.902613] ffff8880099fdc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.903334] ffff8880099fdd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.904072] >ffff8880099fdd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.904819] ^ [ 31.905505] ffff8880099fde00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.906246] ffff8880099fde80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.906981] ================================================================== [ 31.907852] Disabling lock debugging due to kernel taint [ 34.404915] BUG: Bad rss-counter state mm:000000004543179b type:MM_FILEPAGES val:33 [ 34.405888] BUG: Bad rss-counter state mm:000000004543179b type:MM_ANONPAGES val:22 [ 34.947937] BUG: Bad rss-counter state mm:00000000b4667791 type:MM_FILEPAGES val:33 [ 34.949098] BUG: Bad rss-counter state mm:00000000b4667791 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36993' (ECDSA) to the list of known hosts. 2023/06/20 19:11:19 fuzzer started 2023/06/20 19:11:19 dialing manager at localhost:36067 2023/06/20 19:11:19 checking machine... 2023/06/20 19:11:19 checking revisions... [ 35.570485] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:11:19 testing simple program... [ 35.628364] cgroup: Unknown subsys name 'net' [ 35.679888] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:11:19 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f3294ea4000 CR3=0000000019f9a000 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=2039313a31313a3931203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038313a31313a3931203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bbfc09 RBX=ffffffff85dfe048 RCX=ffffffff8180c704 RDX=000000000000000b RSI=ffffffff86138eb0 RDI=ffffffff85dfe034 RBP=ffffffff85dfe034 RSP=ffff88806cf099e0 R8 =ffffffff86138eb0 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020d9c R12=ffffffff85dfe060 R13=ffffffff85dfe034 R14=ffffffff85dfe034 R15=dffffc0000000000 RIP=ffffffff8112fc7a RFL=00000216 [----AP-] 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 00007fe94c2e3900 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=00007ffeb437f76c CR3=000000001bea0000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=000000000000000000000000000000ff XMM04=2929de1cb13a051c966ce97b706d7573 XMM05=000000000000000000000000000000ff XMM06=2929531c263a051c4b6ca27b29235500 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000