syzkaller login: [ 31.595709] BUG: Bad rss-counter state mm:00000000f92fc4c0 type:MM_FILEPAGES val:33 [ 31.596902] BUG: Bad rss-counter state mm:00000000f92fc4c0 type:MM_ANONPAGES val:22 [ 31.743941] ================================================================== [ 31.745045] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.746165] Read of size 8 at addr ffff8880182de4e0 by task sshd/218 [ 31.747263] [ 31.747526] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.748549] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.749736] Call Trace: [ 31.750067] [ 31.750351] dump_stack_lvl+0x91/0xf0 [ 31.750851] print_report+0xcc/0x620 [ 31.751350] ? __virt_addr_valid+0x102/0x340 [ 31.751909] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.752537] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.753156] kasan_report+0xbe/0xf0 [ 31.753645] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.754270] vma_interval_tree_remove+0xc75/0xec0 [ 31.754869] vma_prepare+0xc54/0x11a0 [ 31.755352] __split_vma+0x5af/0x950 [ 31.755830] ? __pfx___split_vma+0x10/0x10 [ 31.756358] ? find_held_lock+0x2c/0x110 [ 31.756888] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.757458] ? lock_is_held_type+0x9f/0x120 [ 31.758021] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.758637] ? mtree_range_walk+0x632/0x900 [ 31.759195] ? mas_walk+0x5c7/0x7c0 [ 31.759686] do_vmi_munmap+0x1f1/0x2b0 [ 31.760185] mmap_region+0x1f9/0x2660 [ 31.760680] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.761197] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.761927] ? __pfx_lock_acquire+0x10/0x10 [ 31.762458] ? __pfx_mmap_region+0x10/0x10 [ 31.762982] ? security_mmap_addr+0x7d/0xa0 [ 31.763511] ? get_unmapped_area+0x1f5/0x3f0 [ 31.764057] do_mmap+0x854/0xf00 [ 31.764507] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.765002] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.765573] ksys_mmap_pgoff+0x3af/0x500 [ 31.766119] do_syscall_64+0x3f/0x90 [ 31.766607] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.767260] RIP: 0033:0x7f805d9ebd82 [ 31.767720] 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 [ 31.769876] RSP: 002b:00007ffe2da85768 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.770792] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f805d9ebd82 [ 31.771636] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f805ce25000 [ 31.772476] RBP: 00007f805ce25000 R08: 0000000000000009 R09: 0000000000001000 [ 31.773333] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b9725f7980 [ 31.774193] R13: 00007ffe2da85780 R14: 00007ffe2da857b0 R15: 00007ffe2da85b10 [ 31.775072] [ 31.775365] [ 31.775582] Allocated by task 211: [ 31.776018] kasan_save_stack+0x22/0x50 [ 31.776523] kasan_set_track+0x25/0x30 [ 31.777015] __kasan_slab_alloc+0x59/0x70 [ 31.777538] kmem_cache_alloc+0x16b/0x370 [ 31.778081] vm_area_dup+0x20/0x160 [ 31.778538] __split_vma+0x170/0x950 [ 31.779010] split_vma+0xc6/0x110 [ 31.779461] mprotect_fixup+0x8d2/0xb30 [ 31.779962] do_mprotect_pkey+0x87e/0xd40 [ 31.780483] __x64_sys_mprotect+0x78/0xc0 [ 31.781010] do_syscall_64+0x3f/0x90 [ 31.781493] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.782146] [ 31.782360] Freed by task 211: [ 31.782755] kasan_save_stack+0x22/0x50 [ 31.783267] kasan_set_track+0x25/0x30 [ 31.783766] kasan_save_free_info+0x2b/0x50 [ 31.784293] __kasan_slab_free+0x10a/0x190 [ 31.784831] kmem_cache_free+0x10d/0x4d0 [ 31.785343] rcu_core+0x8c8/0x2860 [ 31.785808] __do_softirq+0x1b7/0x7d4 [ 31.786289] [ 31.786505] Last potentially related work creation: [ 31.787089] kasan_save_stack+0x22/0x50 [ 31.787596] __kasan_record_aux_stack+0x8e/0xa0 [ 31.788232] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.788881] remove_vma+0x139/0x170 [ 31.789341] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.789912] do_vmi_munmap+0x1f1/0x2b0 [ 31.790408] __vm_munmap+0x138/0x3a0 [ 31.790882] __x64_sys_munmap+0x59/0x80 [ 31.791395] do_syscall_64+0x3f/0x90 [ 31.791870] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.792516] [ 31.792740] The buggy address belongs to the object at ffff8880182de488 [ 31.792740] which belongs to the cache vm_area_struct of size 168 [ 31.794225] The buggy address is located 88 bytes inside of [ 31.794225] freed 168-byte region [ffff8880182de488, ffff8880182de530) [ 31.795648] [ 31.795866] The buggy address belongs to the physical page: [ 31.796519] page:0000000057be059c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x182de [ 31.797621] memcg:ffff88800e543401 [ 31.798059] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.798754] page_type: 0xffffffff() [ 31.799205] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.800118] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e543401 [ 31.801024] page dumped because: kasan: bad access detected [ 31.801693] [ 31.801911] Memory state around the buggy address: [ 31.802490] ffff8880182de380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.803346] ffff8880182de400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.804204] >ffff8880182de480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.805053] ^ [ 31.805835] ffff8880182de500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.806688] ffff8880182de580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.807539] ================================================================== [ 31.808642] Disabling lock debugging due to kernel taint [ 34.050511] BUG: Bad rss-counter state mm:0000000066d907cc type:MM_FILEPAGES val:33 [ 34.051535] BUG: Bad rss-counter state mm:0000000066d907cc type:MM_ANONPAGES val:22 [ 34.456778] BUG: Bad rss-counter state mm:000000001f1e2185 type:MM_FILEPAGES val:33 [ 34.458034] BUG: Bad rss-counter state mm:000000001f1e2185 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13062' (ECDSA) to the list of known hosts. 2023/06/20 13:22:24 fuzzer started 2023/06/20 13:22:24 dialing manager at localhost:36067 2023/06/20 13:22:24 checking machine... 2023/06/20 13:22:24 checking revisions... [ 35.295708] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:22:25 testing simple program... [ 35.347929] cgroup: Unknown subsys name 'net' [ 35.387973] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:22:24 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff812d86ea RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff1100d9c132a RSP=ffff88806ce09940 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b54e7 R12=ffffffff8560b640 R13=ffffffff814c8575 R14=ffffffff85652c08 R15=ffff88800e285280 RIP=ffffffff812d86f2 RFL=00000247 [---Z-PC] 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 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=00007fb6d830c650 CR3=000000000dff6000 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=2034323a32323a3331203032206e754a XMM01=657463656e6e6f63736944203a5d3732 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3732325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a32323a3331203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8185a07c RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888015c17d01 RSI=ffff888015c17dc8 RDI=ffff888015c17dc8 RBP=ffff888015c179e0 RSP=ffff888015c17910 R8 =ffffffff86149060 R9 =ffff888015c179c8 R10=0000000000038001 R11=000000000002388b R12=ffff888015c179e8 R13=ffff888015c179d0 R14=ffff888015c17dd0 R15=ffff888015c17988 RIP=ffffffff8112fbf3 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 00007f571aa15900 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=00007f5719e5abd0 CR3=0000000008ec6000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=8bf2ed1cccae6b3000000000000ae988 XMM05=e9f3a523ef6d09580000000000133108 XMM06=751b9502027dc0b90000000000131c50 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000