syzkaller login: [ 30.713504] BUG: Bad rss-counter state mm:00000000e686a959 type:MM_FILEPAGES val:33 [ 30.714760] BUG: Bad rss-counter state mm:00000000e686a959 type:MM_ANONPAGES val:22 [ 30.749789] ================================================================== [ 30.750902] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.751963] Read of size 8 at addr ffff888015c83b38 by task sshd/219 [ 30.752861] [ 30.753081] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.754062] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.755162] Call Trace: [ 30.755567] [ 30.755852] dump_stack_lvl+0x91/0xf0 [ 30.756371] print_report+0xcc/0x620 [ 30.756879] ? __virt_addr_valid+0x102/0x340 [ 30.757445] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.758126] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.758837] kasan_report+0xbe/0xf0 [ 30.759406] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.760135] vma_interval_tree_remove+0xc75/0xec0 [ 30.760840] vma_prepare+0xc54/0x11a0 [ 30.761416] __split_vma+0x5af/0x950 [ 30.761996] ? __pfx___split_vma+0x10/0x10 [ 30.762598] ? find_held_lock+0x2c/0x110 [ 30.763167] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.763739] ? lock_is_held_type+0x9f/0x120 [ 30.764399] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.765161] ? mtree_range_walk+0x632/0x900 [ 30.765720] ? mas_walk+0x5c7/0x7c0 [ 30.766193] do_vmi_munmap+0x1f1/0x2b0 [ 30.766752] mmap_region+0x1f9/0x2660 [ 30.767259] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.767907] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.768700] ? __pfx_lock_acquire+0x10/0x10 [ 30.769327] ? __pfx_mmap_region+0x10/0x10 [ 30.769954] ? security_mmap_addr+0x7d/0xa0 [ 30.770623] ? get_unmapped_area+0x1f5/0x3f0 [ 30.771219] do_mmap+0x854/0xf00 [ 30.771657] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.772151] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.772718] ksys_mmap_pgoff+0x3af/0x500 [ 30.773224] do_syscall_64+0x3f/0x90 [ 30.773712] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.774356] RIP: 0033:0x7fca450f8d82 [ 30.774813] 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 [ 30.776922] RSP: 002b:00007ffd876dbfb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.777831] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fca450f8d82 [ 30.778842] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fca44532000 [ 30.779679] RBP: 00007fca44532000 R08: 0000000000000009 R09: 0000000000001000 [ 30.780525] R10: 0000000000000812 R11: 0000000000000206 R12: 00005620e7e9fd90 [ 30.781363] R13: 00007ffd876dbfd0 R14: 00007ffd876dc000 R15: 00007ffd876dc360 [ 30.782237] [ 30.782530] [ 30.782747] Allocated by task 212: [ 30.783168] kasan_save_stack+0x22/0x50 [ 30.783668] kasan_set_track+0x25/0x30 [ 30.784165] __kasan_slab_alloc+0x59/0x70 [ 30.784683] kmem_cache_alloc+0x16b/0x370 [ 30.785199] vm_area_dup+0x20/0x160 [ 30.785661] __split_vma+0x170/0x950 [ 30.786136] split_vma+0xc6/0x110 [ 30.786576] mprotect_fixup+0x8d2/0xb30 [ 30.787087] do_mprotect_pkey+0x87e/0xd40 [ 30.787610] __x64_sys_mprotect+0x78/0xc0 [ 30.788131] do_syscall_64+0x3f/0x90 [ 30.788603] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.789240] [ 30.789451] Freed by task 212: [ 30.789851] kasan_save_stack+0x22/0x50 [ 30.790354] kasan_set_track+0x25/0x30 [ 30.790844] kasan_save_free_info+0x2b/0x50 [ 30.791375] __kasan_slab_free+0x10a/0x190 [ 30.791904] kmem_cache_free+0x10d/0x4d0 [ 30.792404] rcu_core+0x8c8/0x2860 [ 30.792841] __do_softirq+0x1b7/0x7d4 [ 30.793316] [ 30.793534] Last potentially related work creation: [ 30.794120] kasan_save_stack+0x22/0x50 [ 30.794619] __kasan_record_aux_stack+0x8e/0xa0 [ 30.795187] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.795825] remove_vma+0x139/0x170 [ 30.796278] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.796829] do_vmi_munmap+0x1f1/0x2b0 [ 30.797307] __vm_munmap+0x138/0x3a0 [ 30.797791] __x64_sys_munmap+0x59/0x80 [ 30.798286] do_syscall_64+0x3f/0x90 [ 30.798761] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.799396] [ 30.799611] The buggy address belongs to the object at ffff888015c83ae0 [ 30.799611] which belongs to the cache vm_area_struct of size 168 [ 30.801089] The buggy address is located 88 bytes inside of [ 30.801089] freed 168-byte region [ffff888015c83ae0, ffff888015c83b88) [ 30.802485] [ 30.802703] The buggy address belongs to the physical page: [ 30.803350] page:00000000cba26478 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15c83 [ 30.804431] memcg:ffff88800ffcc801 [ 30.804858] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.805497] page_type: 0xffffffff() [ 30.805965] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.806872] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ffcc801 [ 30.807772] page dumped because: kasan: bad access detected [ 30.808424] [ 30.808638] Memory state around the buggy address: [ 30.809220] ffff888015c83a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.810073] ffff888015c83a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 30.810913] >ffff888015c83b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.811752] ^ [ 30.812363] ffff888015c83b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.813213] ffff888015c83c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.814063] ================================================================== [ 30.814980] Disabling lock debugging due to kernel taint [ 32.385333] BUG: Bad rss-counter state mm:000000002db4b14e type:MM_FILEPAGES val:33 [ 32.386179] BUG: Bad rss-counter state mm:000000002db4b14e type:MM_ANONPAGES val:22 [ 32.819904] BUG: Bad rss-counter state mm:00000000d7b3e4cc type:MM_FILEPAGES val:33 [ 32.821126] BUG: Bad rss-counter state mm:00000000d7b3e4cc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19980' (ECDSA) to the list of known hosts. 2023/06/20 11:48:34 fuzzer started 2023/06/20 11:48:34 dialing manager at localhost:36067 2023/06/20 11:48:34 checking machine... 2023/06/20 11:48:34 checking revisions... [ 33.355786] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:48:34 testing simple program... [ 33.406219] cgroup: Unknown subsys name 'net' [ 33.446181] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:48:34 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00000000000000e8 RCX=ffffffff83696059 RDX=ffff88801797d1c0 RSI=0000000000000000 RDI=0000000000000005 RBP=00000000000000e8 RSP=ffff8880168d78d8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=ff00545000000000 R12=00000000000000e8 R13=00000000000000e8 R14=0000000000000000 R15=ffff888019494a00 RIP=ffffffff814c027c 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 00007f38db458900 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=00007f38dba0f618 CR3=00000000102f0000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000079e60f68 RBX=000000000000e496 RCX=0000000000000001 RDX=0000000000000016 RSI=ffffffff813c925d RDI=ffffffff85497f20 RBP=0000000000000000 RSP=ffff88806cf09f50 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88806cf2c2b8 R13=0000000000000000 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff810a48a7 RFL=00000046 [---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 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=00007fb483586720 CR3=0000000015dfc000 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=2034333a38343a3131203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033333a38343a3131203032 XMM08=3d64696720303d64697520612f6e3d64 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000