syzkaller login: [ 36.146521] BUG: Bad rss-counter state mm:0000000030b74efe type:MM_FILEPAGES val:33 [ 36.147946] BUG: Bad rss-counter state mm:0000000030b74efe type:MM_ANONPAGES val:22 [ 36.188217] ================================================================== [ 36.189062] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.190000] Read of size 8 at addr ffff8880068fd798 by task sshd/220 [ 36.190825] [ 36.191031] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.191837] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.192762] Call Trace: [ 36.193065] [ 36.193375] dump_stack_lvl+0x91/0xf0 [ 36.193870] print_report+0xcc/0x620 [ 36.194332] ? __virt_addr_valid+0x102/0x340 [ 36.194862] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.195450] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.196039] kasan_report+0xbe/0xf0 [ 36.196494] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.197083] vma_interval_tree_remove+0xc75/0xec0 [ 36.197703] vma_prepare+0xc54/0x11a0 [ 36.198175] __split_vma+0x5af/0x950 [ 36.198634] ? __pfx___split_vma+0x10/0x10 [ 36.199149] ? find_held_lock+0x2c/0x110 [ 36.199657] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.200212] ? lock_is_held_type+0x9f/0x120 [ 36.200739] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.201370] ? mtree_range_walk+0x632/0x900 [ 36.201942] ? mas_walk+0x5c7/0x7c0 [ 36.202406] do_vmi_munmap+0x1f1/0x2b0 [ 36.202883] mmap_region+0x1f9/0x2660 [ 36.203358] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.203863] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.204567] ? __pfx_lock_acquire+0x10/0x10 [ 36.205084] ? __pfx_mmap_region+0x10/0x10 [ 36.205645] ? security_mmap_addr+0x7d/0xa0 [ 36.206199] ? get_unmapped_area+0x1f5/0x3f0 [ 36.206742] do_mmap+0x854/0xf00 [ 36.207177] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.207661] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.208212] ksys_mmap_pgoff+0x3af/0x500 [ 36.208705] do_syscall_64+0x3f/0x90 [ 36.209168] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.209875] RIP: 0033:0x7f18080aad82 [ 36.210337] 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 [ 36.212416] RSP: 002b:00007fff18661928 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.213323] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f18080aad82 [ 36.214175] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f18074e4000 [ 36.214995] RBP: 00007f18074e4000 R08: 0000000000000009 R09: 0000000000001000 [ 36.215807] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d0f2739d90 [ 36.216626] R13: 00007fff18661940 R14: 00007fff18661970 R15: 00007fff18661cd0 [ 36.217504] [ 36.217814] [ 36.218034] Allocated by task 213: [ 36.218461] kasan_save_stack+0x22/0x50 [ 36.218957] kasan_set_track+0x25/0x30 [ 36.219434] __kasan_slab_alloc+0x59/0x70 [ 36.219956] kmem_cache_alloc+0x16b/0x370 [ 36.220463] vm_area_dup+0x20/0x160 [ 36.220909] __split_vma+0x170/0x950 [ 36.221419] split_vma+0xc6/0x110 [ 36.221879] mprotect_fixup+0x8d2/0xb30 [ 36.222361] do_mprotect_pkey+0x87e/0xd40 [ 36.222877] __x64_sys_mprotect+0x78/0xc0 [ 36.223395] do_syscall_64+0x3f/0x90 [ 36.223857] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.224487] [ 36.224699] Freed by task 213: [ 36.225081] kasan_save_stack+0x22/0x50 [ 36.225607] kasan_set_track+0x25/0x30 [ 36.226102] kasan_save_free_info+0x2b/0x50 [ 36.226627] __kasan_slab_free+0x10a/0x190 [ 36.227154] kmem_cache_free+0x10d/0x4d0 [ 36.227651] rcu_core+0x8c8/0x2860 [ 36.228085] __do_softirq+0x1b7/0x7d4 [ 36.228580] [ 36.228799] Last potentially related work creation: [ 36.229419] kasan_save_stack+0x22/0x50 [ 36.229950] __kasan_record_aux_stack+0x8e/0xa0 [ 36.230507] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.231125] remove_vma+0x139/0x170 [ 36.231618] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.232263] do_vmi_munmap+0x1f1/0x2b0 [ 36.232868] __vm_munmap+0x138/0x3a0 [ 36.233430] __x64_sys_munmap+0x59/0x80 [ 36.234045] do_syscall_64+0x3f/0x90 [ 36.234623] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.235340] [ 36.235582] Second to last potentially related work creation: [ 36.236423] kasan_save_stack+0x22/0x50 [ 36.237025] __kasan_record_aux_stack+0x8e/0xa0 [ 36.237733] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.238549] remove_vma+0x139/0x170 [ 36.239103] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.239792] do_vmi_munmap+0x1f1/0x2b0 [ 36.240390] mmap_region+0x1f9/0x2660 [ 36.240968] do_mmap+0x854/0xf00 [ 36.241494] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.242106] ksys_mmap_pgoff+0x3af/0x500 [ 36.242722] do_syscall_64+0x3f/0x90 [ 36.243298] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.244023] [ 36.244245] The buggy address belongs to the object at ffff8880068fd740 [ 36.244245] which belongs to the cache vm_area_struct of size 168 [ 36.245676] The buggy address is located 88 bytes inside of [ 36.245676] freed 168-byte region [ffff8880068fd740, ffff8880068fd7e8) [ 36.247008] [ 36.247216] The buggy address belongs to the physical page: [ 36.247838] page:00000000dfeba2a9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x68fd [ 36.248855] memcg:ffff88800c6cb901 [ 36.249256] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.249864] page_type: 0xffffffff() [ 36.250295] raw: 0100000000000200 ffff88800879fc80 ffffea00003b7e40 dead000000000002 [ 36.251165] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c6cb901 [ 36.252013] page dumped because: kasan: bad access detected [ 36.252629] [ 36.252834] Memory state around the buggy address: [ 36.253385] ffff8880068fd680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.254247] ffff8880068fd700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 36.255081] >ffff8880068fd780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 36.255894] ^ [ 36.256362] ffff8880068fd800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 36.257189] ffff8880068fd880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 36.258018] ================================================================== [ 36.258980] Disabling lock debugging due to kernel taint [ 38.754093] BUG: Bad rss-counter state mm:00000000befd4b5f type:MM_FILEPAGES val:33 [ 38.755137] BUG: Bad rss-counter state mm:00000000befd4b5f type:MM_ANONPAGES val:22 [ 39.186605] BUG: Bad rss-counter state mm:0000000055cdc715 type:MM_FILEPAGES val:33 [ 39.187534] BUG: Bad rss-counter state mm:0000000055cdc715 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46911' (ECDSA) to the list of known hosts. 2023/06/20 04:16:21 fuzzer started 2023/06/20 04:16:21 dialing manager at localhost:44161 2023/06/20 04:16:21 checking machine... 2023/06/20 04:16:21 checking revisions... [ 39.885747] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:16:21 testing simple program... [ 39.935438] cgroup: Unknown subsys name 'net' [ 39.986109] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:16:08 Registers: info registers vcpu 0 RAX=ffff888015fbd1c0 RBX=ffff88806ce09b30 RCX=ffff88806ce09b30 RDX=0000000000000070 RSI=0000000000000000 RDI=ffff88806ce09a98 RBP=ffff888015fbd1c0 RSP=ffff88806ce09a40 R8 =0000000000000130 R9 =0000000000000000 R10=ffffed10012db130 R11=00000000000b6996 R12=0000000000000000 R13=ffff88806ce09ac0 R14=ffff888015fbd1c0 R15=ffff88806ce09a98 RIP=ffffffff8450d3a0 RFL=00000296 [--S-AP-] 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 00007f102127d700 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=00007ffd34146428 CR3=000000000efd0000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a36363338342074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363633 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000006 RDX=1ffff110033f58af RSI=ffffffff83677bb9 RDI=ffffffff81810591 RBP=ffff888019fac500 RSP=ffff88801469f998 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff83c22ffc R13=ffff88800f552b40 R14=ffff88801469fa88 R15=ffff888019fac500 RIP=ffffffff814c07e0 RFL=00000282 [--S----] 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 00007fc01c589900 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=00007f9eb7f4b650 CR3=000000000f1b0000 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=1d2bf59be4512ab298493259a5bed40d XMM02=000000000011fcf0eff9b2d0a8fce9cb XMM03=000000000011fdc02c67c8bc2e329bc3 XMM04=f7059af847e6f83000000000000ae988 XMM05=bcf879dd07470e940000000000135d20 XMM06=4fda316b135da52b00000000001347a0 XMM07=fb795ef6d657705600000000001239d0 XMM08=2c67c8bc2e329bc3000000000011fd60 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000