syzkaller login: [ 31.465744] BUG: Bad rss-counter state mm:000000006170c369 type:MM_FILEPAGES val:33 [ 31.466565] BUG: Bad rss-counter state mm:000000006170c369 type:MM_ANONPAGES val:22 [ 31.584437] ================================================================== [ 31.585134] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.585862] Read of size 8 at addr ffff88800d5383f8 by task sshd/219 [ 31.586444] [ 31.586611] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.587388] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.588122] Call Trace: [ 31.588368] <TASK> [ 31.588583] dump_stack_lvl+0x91/0xf0 [ 31.588957] print_report+0xcc/0x620 [ 31.589327] ? __virt_addr_valid+0x102/0x340 [ 31.589741] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.590209] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.590676] kasan_report+0xbe/0xf0 [ 31.591044] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.591515] vma_interval_tree_remove+0xc75/0xec0 [ 31.591972] vma_prepare+0xc54/0x11a0 [ 31.592335] __split_vma+0x5af/0x950 [ 31.592696] ? __pfx___split_vma+0x10/0x10 [ 31.593097] ? find_held_lock+0x2c/0x110 [ 31.593496] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.593926] ? lock_is_held_type+0x9f/0x120 [ 31.594339] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.594822] ? mtree_range_walk+0x632/0x900 [ 31.595247] ? mas_walk+0x5c7/0x7c0 [ 31.595611] do_vmi_munmap+0x1f1/0x2b0 [ 31.595935] mmap_region+0x1f9/0x2660 [ 31.596228] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.596540] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.596969] ? __pfx_lock_acquire+0x10/0x10 [ 31.597294] ? __pfx_mmap_region+0x10/0x10 [ 31.597609] ? security_mmap_addr+0x7d/0xa0 [ 31.597933] ? get_unmapped_area+0x1f5/0x3f0 [ 31.598263] do_mmap+0x854/0xf00 [ 31.598531] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.598835] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.599171] ksys_mmap_pgoff+0x3af/0x500 [ 31.599479] do_syscall_64+0x3f/0x90 [ 31.599774] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.600158] RIP: 0033:0x7fec30a18d82 [ 31.600436] 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 [ 31.601747] RSP: 002b:00007ffe87cec2c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.602312] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fec30a18d82 [ 31.602839] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fec2fe52000 [ 31.603353] RBP: 00007fec2fe52000 R08: 0000000000000009 R09: 0000000000001000 [ 31.603877] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557e30b8eec0 [ 31.604394] R13: 00007ffe87cec2e0 R14: 00007ffe87cec310 R15: 00007ffe87cec670 [ 31.604914] </TASK> [ 31.605088] [ 31.605215] Allocated by task 212: [ 31.605479] kasan_save_stack+0x22/0x50 [ 31.605783] kasan_set_track+0x25/0x30 [ 31.606086] __kasan_slab_alloc+0x59/0x70 [ 31.606406] kmem_cache_alloc+0x16b/0x370 [ 31.606718] vm_area_dup+0x20/0x160 [ 31.607006] __split_vma+0x170/0x950 [ 31.607284] split_vma+0xc6/0x110 [ 31.607551] mprotect_fixup+0x8d2/0xb30 [ 31.607861] do_mprotect_pkey+0x87e/0xd40 [ 31.608179] __x64_sys_mprotect+0x78/0xc0 [ 31.608491] do_syscall_64+0x3f/0x90 [ 31.608773] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.609165] [ 31.609294] Freed by task 0: [ 31.609551] kasan_save_stack+0x22/0x50 [ 31.609908] kasan_set_track+0x25/0x30 [ 31.610281] kasan_save_free_info+0x2b/0x50 [ 31.610691] __kasan_slab_free+0x10a/0x190 [ 31.611034] kmem_cache_free+0x10d/0x4d0 [ 31.611347] rcu_core+0x8c8/0x2860 [ 31.611610] __do_softirq+0x1b7/0x7d4 [ 31.611902] [ 31.612036] Last potentially related work creation: [ 31.612394] kasan_save_stack+0x22/0x50 [ 31.612702] __kasan_record_aux_stack+0x8e/0xa0 [ 31.613046] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.613447] remove_vma+0x139/0x170 [ 31.613727] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.614080] do_vmi_munmap+0x1f1/0x2b0 [ 31.614383] __vm_munmap+0x138/0x3a0 [ 31.614662] __x64_sys_munmap+0x59/0x80 [ 31.614974] do_syscall_64+0x3f/0x90 [ 31.615265] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.615666] [ 31.615797] Second to last potentially related work creation: [ 31.616216] kasan_save_stack+0x22/0x50 [ 31.616526] __kasan_record_aux_stack+0x8e/0xa0 [ 31.616874] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.617270] remove_vma+0x139/0x170 [ 31.617540] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.617882] do_vmi_munmap+0x1f1/0x2b0 [ 31.618184] mmap_region+0x1f9/0x2660 [ 31.618484] do_mmap+0x854/0xf00 [ 31.618750] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.619068] ksys_mmap_pgoff+0x3af/0x500 [ 31.619378] do_syscall_64+0x3f/0x90 [ 31.619661] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.620065] [ 31.620195] The buggy address belongs to the object at ffff88800d5383a0 [ 31.620195] which belongs to the cache vm_area_struct of size 168 [ 31.621090] The buggy address is located 88 bytes inside of [ 31.621090] freed 168-byte region [ffff88800d5383a0, ffff88800d538448) [ 31.621953] [ 31.622081] The buggy address belongs to the physical page: [ 31.622486] page:00000000c9877eaf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd538 [ 31.623167] memcg:ffff88800c8f4101 [ 31.623430] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.623854] page_type: 0xffffffff() [ 31.624133] raw: 0100000000000200 ffff8880087a0c80 ffffea0000373b00 dead000000000003 [ 31.624696] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c8f4101 [ 31.625253] page dumped because: kasan: bad access detected [ 31.625650] [ 31.625778] Memory state around the buggy address: [ 31.626130] ffff88800d538280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.626650] ffff88800d538300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.627179] >ffff88800d538380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.627692] ^ [ 31.628199] ffff88800d538400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.628730] ffff88800d538480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.629252] ================================================================== [ 31.629868] Disabling lock debugging due to kernel taint [ 33.551825] BUG: Bad rss-counter state mm:0000000069115c48 type:MM_FILEPAGES val:33 [ 33.552729] BUG: Bad rss-counter state mm:0000000069115c48 type:MM_ANONPAGES val:22 [ 34.050828] BUG: Bad rss-counter state mm:00000000d440d2bb type:MM_FILEPAGES val:33 [ 34.051813] BUG: Bad rss-counter state mm:00000000d440d2bb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49483' (ECDSA) to the list of known hosts. 2023/06/21 05:37:05 fuzzer started 2023/06/21 05:37:05 dialing manager at localhost:36067 2023/06/21 05:37:05 checking machine... 2023/06/21 05:37:05 checking revisions... [ 34.817562] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:37:05 testing simple program... [ 34.851613] cgroup: Unknown subsys name 'net' [ 34.887637] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:37:05 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff866212df RCX=0000000000000100 RDX=ffffffff8542a6c0 RSI=ffffffff813a0b06 RDI=0000000000000006 RBP=ffffffffffffffff RSP=ffff88806ce09a20 R8 =0000000000000006 R9 =ffffffff866212df R10=ffffffffffffffff R11=00000000000b54e7 R12=0000000000000000 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88801642b8d0 RIP=ffffffff814c0891 RFL=00000206 [-----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=00007fffe144baf8 CR3=000000000c6e0000 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=2035303a37333a3530203132206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034303a37333a3530203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff85d3e490 RCX=ffffffff812d86ea RDX=1ffffffff0ba7c92 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff1100d9e132e RSP=ffff88806cf09960 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff8560b640 R13=ffffffff814c8575 R14=ffffffff85652c08 R15=ffff888017faf000 RIP=ffffffff812d8710 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 00007f1186015900 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=00007f11865cc618 CR3=000000000d868000 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=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