syzkaller login: [ 31.160374] BUG: Bad rss-counter state mm:00000000aee779ef type:MM_FILEPAGES val:33 [ 31.161591] BUG: Bad rss-counter state mm:00000000aee779ef type:MM_ANONPAGES val:22 [ 31.204616] ================================================================== [ 31.205958] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.207442] Read of size 8 at addr ffff88800f736a50 by task sshd/221 [ 31.208608] [ 31.208867] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.209848] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.210932] Call Trace: [ 31.211290] [ 31.211609] dump_stack_lvl+0x91/0xf0 [ 31.212166] print_report+0xcc/0x620 [ 31.212706] ? __virt_addr_valid+0x102/0x340 [ 31.213333] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.214016] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.214700] kasan_report+0xbe/0xf0 [ 31.215230] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.215931] vma_interval_tree_remove+0xc75/0xec0 [ 31.216597] vma_prepare+0xc54/0x11a0 [ 31.217129] __split_vma+0x5af/0x950 [ 31.217655] ? __pfx___split_vma+0x10/0x10 [ 31.218238] ? find_held_lock+0x2c/0x110 [ 31.218822] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.219449] ? lock_is_held_type+0x9f/0x120 [ 31.220063] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.220741] ? mtree_range_walk+0x632/0x900 [ 31.221359] ? mas_walk+0x5c7/0x7c0 [ 31.221888] do_vmi_munmap+0x1f1/0x2b0 [ 31.222433] mmap_region+0x1f9/0x2660 [ 31.222965] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.223538] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.224342] ? __pfx_lock_acquire+0x10/0x10 [ 31.224930] ? __pfx_mmap_region+0x10/0x10 [ 31.225497] ? security_mmap_addr+0x7d/0xa0 [ 31.226064] ? get_unmapped_area+0x1f5/0x3f0 [ 31.226651] do_mmap+0x854/0xf00 [ 31.227122] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.227653] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.228278] ksys_mmap_pgoff+0x3af/0x500 [ 31.228821] do_syscall_64+0x3f/0x90 [ 31.229332] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.230023] RIP: 0033:0x7f791d0ecd82 [ 31.230515] 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 [ 31.232792] RSP: 002b:00007fffb4ab7498 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.233743] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f791d0ecd82 [ 31.234644] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f791c526000 [ 31.235544] RBP: 00007f791c526000 R08: 0000000000000009 R09: 0000000000001000 [ 31.236458] R10: 0000000000000812 R11: 0000000000000206 R12: 00005633367a1980 [ 31.237360] R13: 00007fffb4ab74b0 R14: 00007fffb4ab74e0 R15: 00007fffb4ab7840 [ 31.238272] [ 31.238586] [ 31.238819] Allocated by task 214: [ 31.239275] kasan_save_stack+0x22/0x50 [ 31.239847] kasan_set_track+0x25/0x30 [ 31.240370] __kasan_slab_alloc+0x59/0x70 [ 31.240929] kmem_cache_alloc+0x16b/0x370 [ 31.241479] vm_area_dup+0x20/0x160 [ 31.241968] __split_vma+0x170/0x950 [ 31.242471] split_vma+0xc6/0x110 [ 31.242941] mprotect_fixup+0x8d2/0xb30 [ 31.243485] do_mprotect_pkey+0x87e/0xd40 [ 31.244062] __x64_sys_mprotect+0x78/0xc0 [ 31.244619] do_syscall_64+0x3f/0x90 [ 31.245130] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.245823] [ 31.246051] Freed by task 211: [ 31.246483] kasan_save_stack+0x22/0x50 [ 31.247018] kasan_set_track+0x25/0x30 [ 31.247545] kasan_save_free_info+0x2b/0x50 [ 31.248128] __kasan_slab_free+0x10a/0x190 [ 31.248701] kmem_cache_free+0x10d/0x4d0 [ 31.249263] rcu_core+0x8c8/0x2860 [ 31.249844] __do_softirq+0x1b7/0x7d4 [ 31.250364] [ 31.250599] Last potentially related work creation: [ 31.251242] kasan_save_stack+0x22/0x50 [ 31.251795] __kasan_record_aux_stack+0x8e/0xa0 [ 31.252425] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.253125] remove_vma+0x139/0x170 [ 31.253620] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.254227] do_vmi_munmap+0x1f1/0x2b0 [ 31.254766] __vm_munmap+0x138/0x3a0 [ 31.255276] __x64_sys_munmap+0x59/0x80 [ 31.255849] do_syscall_64+0x3f/0x90 [ 31.256373] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.257072] [ 31.257313] The buggy address belongs to the object at ffff88800f7369f8 [ 31.257313] which belongs to the cache vm_area_struct of size 168 [ 31.258926] The buggy address is located 88 bytes inside of [ 31.258926] freed 168-byte region [ffff88800f7369f8, ffff88800f736aa0) [ 31.260491] [ 31.260727] The buggy address belongs to the physical page: [ 31.261454] page:000000000f2feb77 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf736 [ 31.262661] memcg:ffff88800d660a01 [ 31.263139] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.263866] page_type: 0xffffffff() [ 31.264365] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.265342] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d660a01 [ 31.266309] page dumped because: kasan: bad access detected [ 31.267020] [ 31.267249] Memory state around the buggy address: [ 31.267885] ffff88800f736900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.268803] ffff88800f736980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.269728] >ffff88800f736a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.270633] ^ [ 31.271362] ffff88800f736a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.272300] ffff88800f736b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.273294] ================================================================== [ 31.274411] Disabling lock debugging due to kernel taint [ 34.121154] BUG: Bad rss-counter state mm:000000004bba5a32 type:MM_FILEPAGES val:33 [ 34.122867] BUG: Bad rss-counter state mm:000000004bba5a32 type:MM_ANONPAGES val:22 [ 34.673350] BUG: Bad rss-counter state mm:00000000b21c0a36 type:MM_FILEPAGES val:33 [ 34.674939] BUG: Bad rss-counter state mm:00000000b21c0a36 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44743' (ECDSA) to the list of known hosts. 2023/06/20 17:03:23 fuzzer started 2023/06/20 17:03:24 dialing manager at localhost:36067 2023/06/20 17:03:24 checking machine... 2023/06/20 17:03:24 checking revisions... [ 35.436714] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:03:24 testing simple program... [ 35.499808] cgroup: Unknown subsys name 'net' [ 35.540457] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:03:23 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85652c60 RCX=0000000000000002 RDX=ffff8880103bd1c0 RSI=ffffffff814c8471 RDI=ffff8880103bd5b4 RBP=00007f4de76bd477 RSP=ffff88800dbc78e8 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=00007f4de76bd477 R13=0000000000000000 R14=ffff8880103bd1c0 R15=0000000000000001 RIP=ffffffff814c8481 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 00007f4de71ca900 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=00007f4de7781618 CR3=000000001c99a000 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=0000000000000068 RBX=0000000000000001 RCX=ffffffff86157fde RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff86157fe2 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000026070 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff888008d7fa08 R15=ffff88806cf09a98 RIP=ffffffff81130bba 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 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=0000556e640f8218 CR3=000000001c99a000 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=d788336da773cb6aa61ad26e41b9ff09 XMM02=d2876449085cfce8e893e0f551bd95b1 XMM03=7f2c9a2f712fccd5e6131d75d25b12c8 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=0e0d0c0f0a09080b0605040702010003 XMM08=01000000000000000000000000000001 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000