syzkaller login: [ 31.625352] BUG: Bad rss-counter state mm:00000000a50cb29d type:MM_FILEPAGES val:33 [ 31.626273] BUG: Bad rss-counter state mm:00000000a50cb29d type:MM_ANONPAGES val:22 [ 31.764556] ================================================================== [ 31.765208] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.765876] Read of size 8 at addr ffff888014010ed8 by task sshd/222 [ 31.766402] [ 31.766554] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.767142] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.767817] Call Trace: [ 31.768069] [ 31.768271] dump_stack_lvl+0x91/0xf0 [ 31.768815] print_report+0xcc/0x620 [ 31.769151] ? __virt_addr_valid+0x102/0x340 [ 31.769542] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.769977] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.770438] kasan_report+0xbe/0xf0 [ 31.770793] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.771223] vma_interval_tree_remove+0xc75/0xec0 [ 31.771655] vma_prepare+0xc54/0x11a0 [ 31.771976] __split_vma+0x5af/0x950 [ 31.772393] ? __pfx___split_vma+0x10/0x10 [ 31.772765] ? find_held_lock+0x2c/0x110 [ 31.773124] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.773514] ? lock_is_held_type+0x9f/0x120 [ 31.773882] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.774305] ? mtree_range_walk+0x632/0x900 [ 31.774683] ? mas_walk+0x5c7/0x7c0 [ 31.775046] do_vmi_munmap+0x1f1/0x2b0 [ 31.775394] mmap_region+0x1f9/0x2660 [ 31.775729] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.776112] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.776599] ? __pfx_lock_acquire+0x10/0x10 [ 31.776958] ? __pfx_mmap_region+0x10/0x10 [ 31.777336] ? security_mmap_addr+0x7d/0xa0 [ 31.777731] ? get_unmapped_area+0x1f5/0x3f0 [ 31.778110] do_mmap+0x854/0xf00 [ 31.778424] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.778774] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.779167] ksys_mmap_pgoff+0x3af/0x500 [ 31.779530] do_syscall_64+0x3f/0x90 [ 31.779869] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.780356] RIP: 0033:0x7f0f949bdd82 [ 31.780669] 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 [ 31.782147] RSP: 002b:00007ffed6c0ecc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.782789] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0f949bdd82 [ 31.783404] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0f93df7000 [ 31.784027] RBP: 00007f0f93df7000 R08: 0000000000000009 R09: 0000000000001000 [ 31.784676] R10: 0000000000000812 R11: 0000000000000206 R12: 00005616ef497d90 [ 31.785268] R13: 00007ffed6c0ece0 R14: 00007ffed6c0ed10 R15: 00007ffed6c0f070 [ 31.785868] [ 31.786081] [ 31.786228] Allocated by task 215: [ 31.786526] kasan_save_stack+0x22/0x50 [ 31.786893] kasan_set_track+0x25/0x30 [ 31.787241] __kasan_slab_alloc+0x59/0x70 [ 31.787632] kmem_cache_alloc+0x16b/0x370 [ 31.788006] vm_area_dup+0x20/0x160 [ 31.788371] __split_vma+0x170/0x950 [ 31.788702] split_vma+0xc6/0x110 [ 31.789031] mprotect_fixup+0x8d2/0xb30 [ 31.789399] do_mprotect_pkey+0x87e/0xd40 [ 31.789771] __x64_sys_mprotect+0x78/0xc0 [ 31.790125] do_syscall_64+0x3f/0x90 [ 31.790449] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.790854] [ 31.790989] Freed by task 13: [ 31.791244] kasan_save_stack+0x22/0x50 [ 31.791600] kasan_set_track+0x25/0x30 [ 31.791945] kasan_save_free_info+0x2b/0x50 [ 31.792354] __kasan_slab_free+0x10a/0x190 [ 31.792726] kmem_cache_free+0x10d/0x4d0 [ 31.793074] rcu_core+0x8c8/0x2860 [ 31.793373] __do_softirq+0x1b7/0x7d4 [ 31.793707] [ 31.793852] Last potentially related work creation: [ 31.794248] kasan_save_stack+0x22/0x50 [ 31.794592] __kasan_record_aux_stack+0x8e/0xa0 [ 31.794972] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.795409] remove_vma+0x139/0x170 [ 31.795736] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.796169] do_vmi_munmap+0x1f1/0x2b0 [ 31.796504] __vm_munmap+0x138/0x3a0 [ 31.796819] __x64_sys_munmap+0x59/0x80 [ 31.797160] do_syscall_64+0x3f/0x90 [ 31.797506] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.797961] [ 31.798114] The buggy address belongs to the object at ffff888014010e80 [ 31.798114] which belongs to the cache vm_area_struct of size 168 [ 31.799139] The buggy address is located 88 bytes inside of [ 31.799139] freed 168-byte region [ffff888014010e80, ffff888014010f28) [ 31.800153] [ 31.800305] The buggy address belongs to the physical page: [ 31.800780] page:00000000ec3aebf1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14010 [ 31.801549] memcg:ffff88801a091b01 [ 31.801858] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.802329] page_type: 0xffffffff() [ 31.802650] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.803309] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a091b01 [ 31.803957] page dumped because: kasan: bad access detected [ 31.804474] [ 31.804630] Memory state around the buggy address: [ 31.805047] ffff888014010d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.805655] ffff888014010e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.806252] >ffff888014010e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.806856] ^ [ 31.807361] ffff888014010f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.807977] ffff888014010f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.808613] ================================================================== [ 31.809426] Disabling lock debugging due to kernel taint [ 33.204224] BUG: Bad rss-counter state mm:00000000c104f069 type:MM_FILEPAGES val:33 [ 33.205006] BUG: Bad rss-counter state mm:00000000c104f069 type:MM_ANONPAGES val:22 [ 33.584926] BUG: Bad rss-counter state mm:00000000b77af093 type:MM_FILEPAGES val:33 [ 33.585575] BUG: Bad rss-counter state mm:00000000b77af093 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13451' (ECDSA) to the list of known hosts. 2023/06/20 08:41:33 fuzzer started 2023/06/20 08:41:33 dialing manager at localhost:44161 2023/06/20 08:41:33 checking machine... 2023/06/20 08:41:33 checking revisions... [ 34.180809] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:41:33 testing simple program... [ 34.210366] cgroup: Unknown subsys name 'net' [ 34.267589] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:41:32 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f233c19bd80 CR3=000000000c4fa000 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=93a68e30f46002985746a915edc3f164 XMM02=2c67c8bc2e329bc3000000000011e060 XMM03=fb795ef6d65770560000000000124d68 XMM04=5c25c1f9edbb604e00000000000ae988 XMM05=cf7e3f6abfe4f0bb0000000000134ad0 XMM06=00c3ffa147b8d8570000000000134758 XMM07=e042d86d42eb936e0000000000124fe8 XMM08=75c951b9d53f20b8000000000011e0c0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=ffff888009a57c10 RSI=ffff888009a57bd8 RDI=ffff888009a574b0 RBP=ffff888009a57548 RSP=ffff888009a574a8 R8 =0000000000000001 R9 =ffff888009a574f0 R10=0000000000038001 R11=00000000000b3eeb R12=ffff888009a57578 R13=0000000000000000 R14=ffff888015818000 R15=ffff88800cd65720 RIP=ffffffff81130340 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 00007f1ff5ca8900 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=00007f1ff5c77008 CR3=000000000c6ac000 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