syzkaller login: [ 35.027627] BUG: Bad rss-counter state mm:00000000424d4d60 type:MM_FILEPAGES val:33 [ 35.029063] BUG: Bad rss-counter state mm:00000000424d4d60 type:MM_ANONPAGES val:22 [ 35.149293] ================================================================== [ 35.150466] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.151552] Read of size 8 at addr ffff88800d9bcb38 by task sshd/220 [ 35.152200] [ 35.152355] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.153144] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.153986] Call Trace: [ 35.154214] <TASK> [ 35.154443] dump_stack_lvl+0x91/0xf0 [ 35.154790] print_report+0xcc/0x620 [ 35.155138] ? __virt_addr_valid+0x102/0x340 [ 35.155526] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.155961] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.156400] kasan_report+0xbe/0xf0 [ 35.156735] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.157175] vma_interval_tree_remove+0xc75/0xec0 [ 35.157635] vma_prepare+0xc54/0x11a0 [ 35.157988] __split_vma+0x5af/0x950 [ 35.158369] ? __pfx___split_vma+0x10/0x10 [ 35.158810] ? find_held_lock+0x2c/0x110 [ 35.159188] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.159607] ? lock_is_held_type+0x9f/0x120 [ 35.159992] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.160439] ? mtree_range_walk+0x632/0x900 [ 35.160837] ? mas_walk+0x5c7/0x7c0 [ 35.161258] do_vmi_munmap+0x1f1/0x2b0 [ 35.161707] mmap_region+0x1f9/0x2660 [ 35.162146] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.162542] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.163065] ? __pfx_lock_acquire+0x10/0x10 [ 35.163463] ? __pfx_mmap_region+0x10/0x10 [ 35.163864] ? security_mmap_addr+0x7d/0xa0 [ 35.164259] ? get_unmapped_area+0x1f5/0x3f0 [ 35.164667] do_mmap+0x854/0xf00 [ 35.164994] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.165360] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.165774] ksys_mmap_pgoff+0x3af/0x500 [ 35.166149] do_syscall_64+0x3f/0x90 [ 35.166513] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.167011] RIP: 0033:0x7f22a7dbdd82 [ 35.167356] 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 [ 35.168881] RSP: 002b:00007ffe421f80f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.169559] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f22a7dbdd82 [ 35.170213] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f22a71f7000 [ 35.170852] RBP: 00007f22a71f7000 R08: 0000000000000009 R09: 0000000000001000 [ 35.171451] R10: 0000000000000812 R11: 0000000000000206 R12: 000055aa366acb20 [ 35.172047] R13: 00007ffe421f8110 R14: 00007ffe421f8140 R15: 00007ffe421f84a0 [ 35.172659] </TASK> [ 35.172888] [ 35.173042] Allocated by task 212: [ 35.173374] kasan_save_stack+0x22/0x50 [ 35.173758] kasan_set_track+0x25/0x30 [ 35.174111] __kasan_slab_alloc+0x59/0x70 [ 35.174536] kmem_cache_alloc+0x16b/0x370 [ 35.174911] vm_area_dup+0x20/0x160 [ 35.175238] __split_vma+0x170/0x950 [ 35.175568] split_vma+0xc6/0x110 [ 35.175878] mprotect_fixup+0x8d2/0xb30 [ 35.176240] do_mprotect_pkey+0x87e/0xd40 [ 35.176722] __x64_sys_mprotect+0x78/0xc0 [ 35.177208] do_syscall_64+0x3f/0x90 [ 35.177645] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.178233] [ 35.178463] Freed by task 212: [ 35.178880] kasan_save_stack+0x22/0x50 [ 35.179427] kasan_set_track+0x25/0x30 [ 35.179913] kasan_save_free_info+0x2b/0x50 [ 35.180402] __kasan_slab_free+0x10a/0x190 [ 35.180884] kmem_cache_free+0x10d/0x4d0 [ 35.181353] rcu_core+0x8c8/0x2860 [ 35.181760] __do_softirq+0x1b7/0x7d4 [ 35.182197] [ 35.182413] Last potentially related work creation: [ 35.182940] kasan_save_stack+0x22/0x50 [ 35.183315] __kasan_record_aux_stack+0x8e/0xa0 [ 35.183741] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.184247] remove_vma+0x139/0x170 [ 35.184594] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.185007] do_vmi_munmap+0x1f1/0x2b0 [ 35.185380] __vm_munmap+0x138/0x3a0 [ 35.185714] __x64_sys_munmap+0x59/0x80 [ 35.186092] do_syscall_64+0x3f/0x90 [ 35.186464] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.186990] [ 35.187192] The buggy address belongs to the object at ffff88800d9bcae0 [ 35.187192] which belongs to the cache vm_area_struct of size 168 [ 35.188277] The buggy address is located 88 bytes inside of [ 35.188277] freed 168-byte region [ffff88800d9bcae0, ffff88800d9bcb88) [ 35.189344] [ 35.189499] The buggy address belongs to the physical page: [ 35.190006] page:0000000066387c3c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd9bc [ 35.190838] memcg:ffff88800e0fd301 [ 35.191142] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.191628] page_type: 0xffffffff() [ 35.191948] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.192611] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0fd301 [ 35.193381] page dumped because: kasan: bad access detected [ 35.193870] [ 35.194033] Memory state around the buggy address: [ 35.194485] ffff88800d9bca00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.195210] ffff88800d9bca80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 35.195931] >ffff88800d9bcb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.196652] ^ [ 35.197123] ffff88800d9bcb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 35.197814] ffff88800d9bcc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 35.198510] ================================================================== [ 35.199460] Disabling lock debugging due to kernel taint [ 37.029933] BUG: Bad rss-counter state mm:00000000d6fb92c7 type:MM_FILEPAGES val:33 [ 37.030772] BUG: Bad rss-counter state mm:00000000d6fb92c7 type:MM_ANONPAGES val:22 [ 37.531897] BUG: Bad rss-counter state mm:00000000a254f212 type:MM_FILEPAGES val:33 [ 37.533092] BUG: Bad rss-counter state mm:00000000a254f212 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23079' (ECDSA) to the list of known hosts. 2023/06/20 01:13:04 fuzzer started 2023/06/20 01:13:04 dialing manager at localhost:44161 2023/06/20 01:13:04 checking machine... 2023/06/20 01:13:04 checking revisions... [ 38.136251] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:13:04 testing simple program... [ 38.178071] cgroup: Unknown subsys name 'net' [ 38.217229] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:12:58 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880096e0780 RCX=1ffffffff0ac2cfa RDX=1ffff1100d9c7401 RSI=0000000000000008 RDI=ffff88806ce3a2e0 RBP=0000000000000200 RSP=ffff888009bffe08 R8 =ffffffff85616740 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff8186b910 R13=ffff88806ce3a3a8 R14=ffff88806ce3a2c0 R15=0000000000000000 RIP=ffffffff81370b2f 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 00007f5350a98900 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=000055c639984568 CR3=000000000d924000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=cdc8f9d69a80ed4300000000000ae988 XMM05=33dda876ba4f3b2c0000000000135410 XMM06=19e9129bd510f2350000000000134558 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007fff5be31c68 CR3=0000000017990000 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=33313a3130203032206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732034303a3331 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323739 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000