syzkaller login: [ 30.693224] BUG: Bad rss-counter state mm:0000000030b236cc type:MM_FILEPAGES val:33 [ 30.694403] BUG: Bad rss-counter state mm:0000000030b236cc type:MM_ANONPAGES val:22 [ 30.729581] ================================================================== [ 30.730754] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.731849] Read of size 8 at addr ffff88801a1dc5c8 by task sshd/219 [ 30.732984] [ 30.733337] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.734494] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.735775] Call Trace: [ 30.736259] [ 30.736677] dump_stack_lvl+0x91/0xf0 [ 30.737272] print_report+0xcc/0x620 [ 30.737849] ? __virt_addr_valid+0x102/0x340 [ 30.738608] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.739413] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.740319] kasan_report+0xbe/0xf0 [ 30.740940] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.741812] vma_interval_tree_remove+0xc75/0xec0 [ 30.742620] vma_prepare+0xc54/0x11a0 [ 30.743179] __split_vma+0x5af/0x950 [ 30.743682] ? __pfx___split_vma+0x10/0x10 [ 30.744215] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.744794] ? __pfx___lock_acquire+0x10/0x10 [ 30.745351] ? lock_is_held_type+0x9f/0x120 [ 30.745889] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.746495] ? mtree_range_walk+0x632/0x900 [ 30.747050] ? mas_walk+0x5c7/0x7c0 [ 30.747534] do_vmi_munmap+0x1f1/0x2b0 [ 30.748025] mmap_region+0x1f9/0x2660 [ 30.748511] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.749035] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.749756] ? __pfx_lock_acquire+0x10/0x10 [ 30.750288] ? __pfx_mmap_region+0x10/0x10 [ 30.750820] ? security_mmap_addr+0x7d/0xa0 [ 30.751354] ? get_unmapped_area+0x1f5/0x3f0 [ 30.751904] do_mmap+0x854/0xf00 [ 30.752343] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.752867] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.753437] ksys_mmap_pgoff+0x3af/0x500 [ 30.753950] do_syscall_64+0x3f/0x90 [ 30.754438] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.755090] RIP: 0033:0x7f3d6a85dd82 [ 30.755550] 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 [ 30.757795] RSP: 002b:00007ffef713d4f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.758747] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3d6a85dd82 [ 30.759604] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3d69c97000 [ 30.760454] RBP: 00007f3d69c97000 R08: 0000000000000009 R09: 0000000000001000 [ 30.761318] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564614a8ef60 [ 30.762169] R13: 00007ffef713d510 R14: 00007ffef713d540 R15: 00007ffef713d8a0 [ 30.763037] [ 30.763331] [ 30.763550] Allocated by task 212: [ 30.763974] kasan_save_stack+0x22/0x50 [ 30.764476] kasan_set_track+0x25/0x30 [ 30.764984] __kasan_slab_alloc+0x59/0x70 [ 30.765511] kmem_cache_alloc+0x16b/0x370 [ 30.766031] vm_area_dup+0x20/0x160 [ 30.766495] __split_vma+0x170/0x950 [ 30.766962] split_vma+0xc6/0x110 [ 30.767399] mprotect_fixup+0x8d2/0xb30 [ 30.767899] do_mprotect_pkey+0x87e/0xd40 [ 30.768416] __x64_sys_mprotect+0x78/0xc0 [ 30.768949] do_syscall_64+0x3f/0x90 [ 30.769427] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.770081] [ 30.770294] Freed by task 212: [ 30.770689] kasan_save_stack+0x22/0x50 [ 30.771191] kasan_set_track+0x25/0x30 [ 30.771682] kasan_save_free_info+0x2b/0x50 [ 30.772222] __kasan_slab_free+0x10a/0x190 [ 30.772784] kmem_cache_free+0x10d/0x4d0 [ 30.773296] rcu_core+0x8c8/0x2860 [ 30.773747] __do_softirq+0x1b7/0x7d4 [ 30.774227] [ 30.774447] Last potentially related work creation: [ 30.775034] kasan_save_stack+0x22/0x50 [ 30.775538] __kasan_record_aux_stack+0x8e/0xa0 [ 30.776115] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.776760] remove_vma+0x139/0x170 [ 30.777216] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.777776] do_vmi_munmap+0x1f1/0x2b0 [ 30.778272] __vm_munmap+0x138/0x3a0 [ 30.778739] __x64_sys_munmap+0x59/0x80 [ 30.779239] do_syscall_64+0x3f/0x90 [ 30.779723] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.780365] [ 30.780591] The buggy address belongs to the object at ffff88801a1dc570 [ 30.780591] which belongs to the cache vm_area_struct of size 168 [ 30.782073] The buggy address is located 88 bytes inside of [ 30.782073] freed 168-byte region [ffff88801a1dc570, ffff88801a1dc618) [ 30.783467] [ 30.783685] The buggy address belongs to the physical page: [ 30.784339] page:0000000010000bdb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a1dc [ 30.785456] memcg:ffff88801014f401 [ 30.785889] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.786531] page_type: 0xffffffff() [ 30.786992] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.787926] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801014f401 [ 30.788850] page dumped because: kasan: bad access detected [ 30.789509] [ 30.789730] Memory state around the buggy address: [ 30.790312] ffff88801a1dc480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.791179] ffff88801a1dc500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.792044] >ffff88801a1dc580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.792921] ^ [ 30.793595] ffff88801a1dc600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.794455] ffff88801a1dc680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.795312] ================================================================== [ 30.796368] Disabling lock debugging due to kernel taint [ 32.553485] BUG: Bad rss-counter state mm:00000000ac741b65 type:MM_FILEPAGES val:33 [ 32.554213] BUG: Bad rss-counter state mm:00000000ac741b65 type:MM_ANONPAGES val:22 [ 32.988477] BUG: Bad rss-counter state mm:00000000c47666d8 type:MM_FILEPAGES val:33 [ 32.989791] BUG: Bad rss-counter state mm:00000000c47666d8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3285' (ECDSA) to the list of known hosts. 2023/06/20 16:13:26 fuzzer started 2023/06/20 16:13:26 dialing manager at localhost:36067 2023/06/20 16:13:26 checking machine... 2023/06/20 16:13:26 checking revisions... [ 33.706605] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:13:26 testing simple program... [ 33.766288] cgroup: Unknown subsys name 'net' [ 33.819557] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:13:26 Registers: info registers vcpu 0 RAX=1ffff11001e79943 RBX=ffff88800f3cc9e8 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800f3cca18 RBP=ffff88800b404f80 RSP=ffff888008d9fc98 R8 =0000000000000001 R9 =ffffed10011b3f87 R10=0000000000000003 R11=0000000000000128 R12=dffffc0000000000 R13=ffff88800f070280 R14=ffffffff8186b835 R15=ffff888017fcc780 RIP=ffffffff818464e2 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 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=00007fffd4ec3c38 CR3=000000000e43a000 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=2035323a33313a3631203032206e754a XMM01=6964206465766965636552203a5d3832 XMM02=6f63736964203a31313a383339373420 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035323a33313a3631203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0c2712f RBX=0000000000000001 RCX=ffffffff86138976 RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffffffff86138978 RBP=ffff888008e379d0 RSP=ffff888008e37908 R8 =ffffffff8613897a R9 =ffff888008e379b8 R10=0000000000038001 R11=0000000000020cbd R12=ffff888008e379d8 R13=ffff888008e379c0 R14=ffff888008e37d48 R15=ffff888008e37978 RIP=ffffffff811311c7 RFL=00000212 [----A--] 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=00007f7086507650 CR3=000000000ee4a000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000