syzkaller login: [ 45.751476] BUG: Bad rss-counter state mm:000000003bce76eb type:MM_FILEPAGES val:33 [ 45.752703] BUG: Bad rss-counter state mm:000000003bce76eb type:MM_ANONPAGES val:22 [ 45.789590] ================================================================== [ 45.790576] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 45.791626] Read of size 8 at addr ffff88800dc26df0 by task sshd/220 [ 45.792405] [ 45.792621] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 45.793536] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 45.794516] Call Trace: [ 45.794845] [ 45.795141] dump_stack_lvl+0x91/0xf0 [ 45.795634] print_report+0xcc/0x620 [ 45.796134] ? __virt_addr_valid+0x102/0x340 [ 45.796716] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.797344] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.797961] kasan_report+0xbe/0xf0 [ 45.798438] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.799079] vma_interval_tree_remove+0xc75/0xec0 [ 45.799722] vma_prepare+0xc54/0x11a0 [ 45.800224] __split_vma+0x5af/0x950 [ 45.800726] ? __pfx___split_vma+0x10/0x10 [ 45.801295] ? find_held_lock+0x2c/0x110 [ 45.801852] do_vmi_align_munmap+0x2ba/0x11f0 [ 45.802449] ? lock_is_held_type+0x9f/0x120 [ 45.803020] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 45.803665] ? mtree_range_walk+0x632/0x900 [ 45.804241] ? mas_walk+0x5c7/0x7c0 [ 45.804760] do_vmi_munmap+0x1f1/0x2b0 [ 45.805284] mmap_region+0x1f9/0x2660 [ 45.805793] ? vm_mmap_pgoff+0x15c/0x3a0 [ 45.806332] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 45.807094] ? __pfx_lock_acquire+0x10/0x10 [ 45.807653] ? __pfx_mmap_region+0x10/0x10 [ 45.808217] ? security_mmap_addr+0x7d/0xa0 [ 45.808793] ? get_unmapped_area+0x1f5/0x3f0 [ 45.809366] do_mmap+0x854/0xf00 [ 45.809832] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.810359] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 45.810947] ksys_mmap_pgoff+0x3af/0x500 [ 45.811482] do_syscall_64+0x3f/0x90 [ 45.811983] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.812675] RIP: 0033:0x7fd605e0bd82 [ 45.813166] 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 [ 45.815456] RSP: 002b:00007ffc5023eea8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 45.816424] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd605e0bd82 [ 45.817340] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd605245000 [ 45.818245] RBP: 00007fd605245000 R08: 0000000000000009 R09: 0000000000001000 [ 45.819144] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a822812ec0 [ 45.820040] R13: 00007ffc5023eec0 R14: 00007ffc5023eef0 R15: 00007ffc5023f250 [ 45.820967] [ 45.821282] [ 45.821507] Allocated by task 212: [ 45.821966] kasan_save_stack+0x22/0x50 [ 45.822503] kasan_set_track+0x25/0x30 [ 45.823023] __kasan_slab_alloc+0x59/0x70 [ 45.823571] kmem_cache_alloc+0x16b/0x370 [ 45.824123] vm_area_dup+0x20/0x160 [ 45.824611] __split_vma+0x170/0x950 [ 45.825274] split_vma+0xc6/0x110 [ 45.825856] mprotect_fixup+0x8d2/0xb30 [ 45.826501] do_mprotect_pkey+0x87e/0xd40 [ 45.827173] __x64_sys_mprotect+0x78/0xc0 [ 45.827837] do_syscall_64+0x3f/0x90 [ 45.828434] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.829214] [ 45.829437] Freed by task 212: [ 45.829856] kasan_save_stack+0x22/0x50 [ 45.830389] kasan_set_track+0x25/0x30 [ 45.830916] kasan_save_free_info+0x2b/0x50 [ 45.831484] __kasan_slab_free+0x10a/0x190 [ 45.832058] kmem_cache_free+0x10d/0x4d0 [ 45.832604] rcu_core+0x8c8/0x2860 [ 45.833096] __do_softirq+0x1b7/0x7d4 [ 45.833615] [ 45.833845] Last potentially related work creation: [ 45.834466] kasan_save_stack+0x22/0x50 [ 45.834993] __kasan_record_aux_stack+0x8e/0xa0 [ 45.835603] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.836285] remove_vma+0x139/0x170 [ 45.836780] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.837383] do_vmi_munmap+0x1f1/0x2b0 [ 45.837888] __vm_munmap+0x138/0x3a0 [ 45.838377] __x64_sys_munmap+0x59/0x80 [ 45.838913] do_syscall_64+0x3f/0x90 [ 45.839413] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.840098] [ 45.840324] The buggy address belongs to the object at ffff88800dc26d98 [ 45.840324] which belongs to the cache vm_area_struct of size 168 [ 45.841903] The buggy address is located 88 bytes inside of [ 45.841903] freed 168-byte region [ffff88800dc26d98, ffff88800dc26e40) [ 45.843417] [ 45.843640] The buggy address belongs to the physical page: [ 45.844336] page:00000000506aaaa4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdc26 [ 45.845519] memcg:ffff88800c4d2301 [ 45.845973] flags: 0x100000000000200(slab|node=0|zone=1) [ 45.846670] page_type: 0xffffffff() [ 45.847158] raw: 0100000000000200 ffff88800879fc80 ffffea000036e880 dead000000000008 [ 45.848135] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c4d2301 [ 45.849145] page dumped because: kasan: bad access detected [ 45.849856] [ 45.850079] Memory state around the buggy address: [ 45.850715] ffff88800dc26c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 45.851635] ffff88800dc26d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 45.852555] >ffff88800dc26d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 45.853476] ^ [ 45.854349] ffff88800dc26e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 45.855280] ffff88800dc26e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 45.856189] ================================================================== [ 45.857356] Disabling lock debugging due to kernel taint [ 47.687225] BUG: Bad rss-counter state mm:00000000c3ea51df type:MM_FILEPAGES val:33 [ 47.688433] BUG: Bad rss-counter state mm:00000000c3ea51df type:MM_ANONPAGES val:22 [ 48.153711] BUG: Bad rss-counter state mm:00000000a6f23848 type:MM_FILEPAGES val:33 [ 48.154744] BUG: Bad rss-counter state mm:00000000a6f23848 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13380' (ECDSA) to the list of known hosts. 2023/06/20 02:52:35 fuzzer started 2023/06/20 02:52:35 dialing manager at localhost:44161 2023/06/20 02:52:35 checking machine... 2023/06/20 02:52:35 checking revisions... [ 48.834356] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:52:35 testing simple program... [ 48.882979] cgroup: Unknown subsys name 'net' [ 48.930455] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:52:18 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888098d84d68 RCX=0000000000000000 RDX=ffff888019c5d1c0 RSI=ffffffff81143144 RDI=0000000000000006 RBP=0000000018d84d68 RSP=ffff88801918fbd0 R8 =0000000000000006 R9 =ffff888098d84d68 R10=0000000018d84d68 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000020 R14=ffff888018d84c08 R15=ffff888018d84c58 RIP=ffffffff814c081b RFL=00000246 [---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 00007f006bad1900 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=00007ffe05f94000 CR3=000000000e7e4000 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=6720646572637465733a4d41503d706f 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 info registers vcpu 1 RAX=1ffff1100227740e RBX=ffff888011ed39e8 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff888011ed3a18 RBP=ffff8880113b4af0 RSP=ffff88806cf09db8 R8 =0000000000000001 R9 =ffffed100d9e13ab R10=0000000000000003 R11=0000000000000000 R12=dffffc0000000000 R13=ffff888015ef7800 R14=ffffffff818c7463 R15=ffff88800d9a2780 RIP=ffffffff81846356 RFL=00000086 [--S--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 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=00007fbf066f2288 CR3=0000000016f9c000 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=2035333a32353a3230203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034333a32353a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000