syzkaller login: [ 39.228696] BUG: Bad rss-counter state mm:000000002246482a type:MM_FILEPAGES val:33 [ 39.230107] BUG: Bad rss-counter state mm:000000002246482a type:MM_ANONPAGES val:22 [ 39.395613] ================================================================== [ 39.396651] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.397737] Read of size 8 at addr ffff8880167273f8 by task sshd/219 [ 39.398717] [ 39.398971] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.399984] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.401173] Call Trace: [ 39.401538] [ 39.401866] dump_stack_lvl+0x91/0xf0 [ 39.402415] print_report+0xcc/0x620 [ 39.402965] ? __virt_addr_valid+0x102/0x340 [ 39.403618] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.404334] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.405033] kasan_report+0xbe/0xf0 [ 39.405600] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.406300] vma_interval_tree_remove+0xc75/0xec0 [ 39.406981] vma_prepare+0xc54/0x11a0 [ 39.407549] __split_vma+0x5af/0x950 [ 39.408088] ? __pfx___split_vma+0x10/0x10 [ 39.408695] ? find_held_lock+0x2c/0x110 [ 39.409310] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.409963] ? lock_is_held_type+0x9f/0x120 [ 39.410573] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.411277] ? mtree_range_walk+0x632/0x900 [ 39.411922] ? mas_walk+0x5c7/0x7c0 [ 39.412472] do_vmi_munmap+0x1f1/0x2b0 [ 39.413040] mmap_region+0x1f9/0x2660 [ 39.413601] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.414198] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.415007] ? __pfx_lock_acquire+0x10/0x10 [ 39.415643] ? __pfx_mmap_region+0x10/0x10 [ 39.416263] ? security_mmap_addr+0x7d/0xa0 [ 39.416860] ? get_unmapped_area+0x1f5/0x3f0 [ 39.417498] do_mmap+0x854/0xf00 [ 39.418002] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.418573] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.419219] ksys_mmap_pgoff+0x3af/0x500 [ 39.419828] do_syscall_64+0x3f/0x90 [ 39.420385] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.421151] RIP: 0033:0x7fab45730d82 [ 39.421678] 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 [ 39.424169] RSP: 002b:00007fff3e12df88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.425217] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fab45730d82 [ 39.426196] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fab44b6a000 [ 39.427184] RBP: 00007fab44b6a000 R08: 0000000000000009 R09: 0000000000001000 [ 39.428179] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555dc2224ec0 [ 39.429167] R13: 00007fff3e12dfa0 R14: 00007fff3e12dfd0 R15: 00007fff3e12e330 [ 39.430162] [ 39.430495] [ 39.430737] Allocated by task 212: [ 39.431226] kasan_save_stack+0x22/0x50 [ 39.431821] kasan_set_track+0x25/0x30 [ 39.432381] __kasan_slab_alloc+0x59/0x70 [ 39.432987] kmem_cache_alloc+0x16b/0x370 [ 39.433610] vm_area_dup+0x20/0x160 [ 39.434130] __split_vma+0x170/0x950 [ 39.434659] split_vma+0xc6/0x110 [ 39.435162] mprotect_fixup+0x8d2/0xb30 [ 39.435748] do_mprotect_pkey+0x87e/0xd40 [ 39.436340] __x64_sys_mprotect+0x78/0xc0 [ 39.436937] do_syscall_64+0x3f/0x90 [ 39.437494] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.438231] [ 39.438474] Freed by task 212: [ 39.438922] kasan_save_stack+0x22/0x50 [ 39.439528] kasan_set_track+0x25/0x30 [ 39.440096] kasan_save_free_info+0x2b/0x50 [ 39.440706] __kasan_slab_free+0x10a/0x190 [ 39.441340] kmem_cache_free+0x10d/0x4d0 [ 39.441923] rcu_core+0x8c8/0x2860 [ 39.442432] __do_softirq+0x1b7/0x7d4 [ 39.442981] [ 39.443222] Last potentially related work creation: [ 39.443926] kasan_save_stack+0x22/0x50 [ 39.444500] __kasan_record_aux_stack+0x8e/0xa0 [ 39.445163] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.445905] remove_vma+0x139/0x170 [ 39.446420] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.447072] do_vmi_munmap+0x1f1/0x2b0 [ 39.447657] __vm_munmap+0x138/0x3a0 [ 39.448197] __x64_sys_munmap+0x59/0x80 [ 39.448772] do_syscall_64+0x3f/0x90 [ 39.449332] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.450070] [ 39.450319] The buggy address belongs to the object at ffff8880167273a0 [ 39.450319] which belongs to the cache vm_area_struct of size 168 [ 39.452048] The buggy address is located 88 bytes inside of [ 39.452048] freed 168-byte region [ffff8880167273a0, ffff888016727448) [ 39.453684] [ 39.453929] The buggy address belongs to the physical page: [ 39.454698] page:000000009fb4630a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16727 [ 39.455995] memcg:ffff888016ad9c01 [ 39.456494] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.457255] page_type: 0xffffffff() [ 39.457776] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 39.458840] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016ad9c01 [ 39.459927] page dumped because: kasan: bad access detected [ 39.460690] [ 39.460935] Memory state around the buggy address: [ 39.461616] ffff888016727280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 39.462609] ffff888016727300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 39.463626] >ffff888016727380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 39.464606] ^ [ 39.465613] ffff888016727400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 39.466605] ffff888016727480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.467621] ================================================================== [ 39.468868] Disabling lock debugging due to kernel taint [ 41.656892] BUG: Bad rss-counter state mm:000000000ddbe714 type:MM_FILEPAGES val:33 [ 41.658160] BUG: Bad rss-counter state mm:000000000ddbe714 type:MM_ANONPAGES val:22 [ 42.045236] BUG: Bad rss-counter state mm:000000002238e619 type:MM_FILEPAGES val:33 [ 42.046242] BUG: Bad rss-counter state mm:000000002238e619 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17328' (ECDSA) to the list of known hosts. 2023/06/20 07:04:51 fuzzer started 2023/06/20 07:04:52 dialing manager at localhost:44161 2023/06/20 07:04:52 checking machine... 2023/06/20 07:04:52 checking revisions... [ 42.759697] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:04:52 testing simple program... [ 42.813665] cgroup: Unknown subsys name 'net' [ 42.891409] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:04:51 Registers: info registers vcpu 0 RAX=1ffff11001cc7f69 RBX=ffff88800e63fb18 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800e63fb48 RBP=ffff88801637e658 RSP=ffff88801476fd18 R8 =0000000000000001 R9 =ffffed10028edf97 R10=0000000000000003 R11=00000000000b6cb2 R12=dffffc0000000000 R13=ffff8880163b5608 R14=ffffffff813782a8 R15=ffff888016486f00 RIP=ffffffff81846362 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fe72d120900 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=00007fe72c640000 CR3=000000000f2e2000 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=f31c663ef28d40a3184c0622d9ee4588 XMM02=000000000011d638eff9b2d0a8fce9cb XMM03=000000000011d7082c67c8bc2e329bc3 XMM04=6dc05ee7adf8e36700000000000ae988 XMM05=483a7f5a8afee3e50000000000134e60 XMM06=7ebece6dea820bee0000000000133890 XMM07=fb795ef6d65770560000000000124068 XMM08=2c67c8bc2e329bc3000000000011d6a8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff863dcad0 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff8880196375f8 RSP=ffff888019637530 R8 =ffffffff863dcad4 R9 =ffff8880196375e0 R10=0000000000038001 R11=0000000000091bd6 R12=ffff888019637600 R13=ffff8880196375e8 R14=0000000000000005 R15=ffff8880196375a0 RIP=ffffffff81130b39 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 00007f15c0996900 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=00007fffc9a63000 CR3=0000000008da0000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000