syzkaller login: [ 30.404887] BUG: Bad rss-counter state mm:000000007f689fa4 type:MM_FILEPAGES val:33 [ 30.406420] BUG: Bad rss-counter state mm:000000007f689fa4 type:MM_ANONPAGES val:22 [ 30.580705] ================================================================== [ 30.581667] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.582626] Read of size 8 at addr ffff88801809d968 by task sshd/220 [ 30.583393] [ 30.583611] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.584625] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.585614] Call Trace: [ 30.585965] [ 30.586255] dump_stack_lvl+0x91/0xf0 [ 30.586766] print_report+0xcc/0x620 [ 30.587266] ? __virt_addr_valid+0x102/0x340 [ 30.587818] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.588448] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.589078] kasan_report+0xbe/0xf0 [ 30.589567] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.590204] vma_interval_tree_remove+0xc75/0xec0 [ 30.590817] vma_prepare+0xc54/0x11a0 [ 30.591312] __split_vma+0x5af/0x950 [ 30.591789] ? __pfx___split_vma+0x10/0x10 [ 30.592318] ? find_held_lock+0x2c/0x110 [ 30.592839] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.593409] ? lock_is_held_type+0x9f/0x120 [ 30.593981] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.594598] ? mtree_range_walk+0x632/0x900 [ 30.595162] ? mas_walk+0x5c7/0x7c0 [ 30.595642] do_vmi_munmap+0x1f1/0x2b0 [ 30.596142] mmap_region+0x1f9/0x2660 [ 30.596626] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.597145] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.597882] ? __pfx_lock_acquire+0x10/0x10 [ 30.598421] ? __pfx_mmap_region+0x10/0x10 [ 30.598959] ? security_mmap_addr+0x7d/0xa0 [ 30.599497] ? get_unmapped_area+0x1f5/0x3f0 [ 30.600048] do_mmap+0x854/0xf00 [ 30.600501] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.601001] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.601566] ksys_mmap_pgoff+0x3af/0x500 [ 30.602097] do_syscall_64+0x3f/0x90 [ 30.602579] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.603265] RIP: 0033:0x7fbe9986dd82 [ 30.603788] 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 [ 30.605915] RSP: 002b:00007ffc80620498 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.606841] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbe9986dd82 [ 30.607709] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbe98ca7000 [ 30.608572] RBP: 00007fbe98ca7000 R08: 0000000000000009 R09: 0000000000001000 [ 30.609426] R10: 0000000000000812 R11: 0000000000000206 R12: 00005621eb42eec0 [ 30.610305] R13: 00007ffc806204b0 R14: 00007ffc806204e0 R15: 00007ffc80620840 [ 30.611195] [ 30.611492] [ 30.611714] Allocated by task 213: [ 30.612147] kasan_save_stack+0x22/0x50 [ 30.612659] kasan_set_track+0x25/0x30 [ 30.613153] __kasan_slab_alloc+0x59/0x70 [ 30.613704] kmem_cache_alloc+0x16b/0x370 [ 30.614223] vm_area_dup+0x20/0x160 [ 30.614696] __split_vma+0x170/0x950 [ 30.615171] split_vma+0xc6/0x110 [ 30.615622] mprotect_fixup+0x8d2/0xb30 [ 30.616134] do_mprotect_pkey+0x87e/0xd40 [ 30.616656] __x64_sys_mprotect+0x78/0xc0 [ 30.617175] do_syscall_64+0x3f/0x90 [ 30.617661] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.618309] [ 30.618523] Freed by task 213: [ 30.618921] kasan_save_stack+0x22/0x50 [ 30.619424] kasan_set_track+0x25/0x30 [ 30.619916] kasan_save_free_info+0x2b/0x50 [ 30.620448] __kasan_slab_free+0x10a/0x190 [ 30.620985] kmem_cache_free+0x10d/0x4d0 [ 30.621495] rcu_core+0x8c8/0x2860 [ 30.621959] __do_softirq+0x1b7/0x7d4 [ 30.622439] [ 30.622654] Last potentially related work creation: [ 30.623244] kasan_save_stack+0x22/0x50 [ 30.623755] __kasan_record_aux_stack+0x8e/0xa0 [ 30.624341] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.624998] remove_vma+0x139/0x170 [ 30.625459] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.626039] do_vmi_munmap+0x1f1/0x2b0 [ 30.626534] __vm_munmap+0x138/0x3a0 [ 30.627024] __x64_sys_munmap+0x59/0x80 [ 30.627538] do_syscall_64+0x3f/0x90 [ 30.628027] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.628697] [ 30.628918] The buggy address belongs to the object at ffff88801809d910 [ 30.628918] which belongs to the cache vm_area_struct of size 168 [ 30.630431] The buggy address is located 88 bytes inside of [ 30.630431] freed 168-byte region [ffff88801809d910, ffff88801809d9b8) [ 30.631891] [ 30.632113] The buggy address belongs to the physical page: [ 30.632804] page:00000000e693cf3b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1809d [ 30.633945] memcg:ffff88800f1fd101 [ 30.634386] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.635062] page_type: 0xffffffff() [ 30.635528] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.636490] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f1fd101 [ 30.637434] page dumped because: kasan: bad access detected [ 30.638136] [ 30.638358] Memory state around the buggy address: [ 30.638966] ffff88801809d800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.639859] ffff88801809d880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.640750] >ffff88801809d900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.641657] ^ [ 30.642475] ffff88801809d980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.643365] ffff88801809da00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.644258] ================================================================== [ 30.645295] Disabling lock debugging due to kernel taint [ 33.075049] BUG: Bad rss-counter state mm:00000000601d9421 type:MM_FILEPAGES val:33 [ 33.076226] BUG: Bad rss-counter state mm:00000000601d9421 type:MM_ANONPAGES val:22 [ 33.564053] BUG: Bad rss-counter state mm:00000000bed18ad1 type:MM_FILEPAGES val:33 [ 33.565206] BUG: Bad rss-counter state mm:00000000bed18ad1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13720' (ECDSA) to the list of known hosts. 2023/06/20 18:05:17 fuzzer started 2023/06/20 18:05:18 dialing manager at localhost:36067 2023/06/20 18:05:18 checking machine... 2023/06/20 18:05:18 checking revisions... [ 34.345131] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:05:18 testing simple program... [ 34.398647] cgroup: Unknown subsys name 'net' [ 34.460803] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:05:17 Registers: info registers vcpu 0 RAX=ffffffff8185a0da RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88801822fd01 RSI=ffff88801822fdc8 RDI=ffff88801822fdc8 RBP=ffff88806ce09ac8 RSP=ffff88806ce099f8 R8 =ffffffff86147968 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=00000000000234b5 R12=ffff88806ce09ad0 R13=ffff88806ce09ab8 R14=ffff88801822fdd0 R15=ffff88806ce09a70 RIP=ffffffff8112fbf3 RFL=00000202 [-------] 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 00007fa6d3a73900 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=00007fa6d4028650 CR3=000000001bd6a000 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=2037313a35303a3831203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037313a35303a3831203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001b12769 RBX=ffff88800d893b18 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800d893b48 RBP=ffff888018134000 RSP=ffff888015ce78e8 R8 =0000000000000001 R9 =ffffed1002b9cf11 R10=0000000000000003 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff888018194500 R14=ffffffff8366b8df R15=ffff888015ec5600 RIP=ffffffff818464e2 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 00007f2cf814a900 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=00007f2cf7558290 CR3=000000000cc40000 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=0f65a1105f44aaa5b544cdf79b64d946 XMM02=000000000011a8f8d59e07bde36eea69 XMM03=000000000011aa40ec2efd57dc4c00df XMM04=bbd4249214bd34b800000000000ae988 XMM05=9250d0805d87d09f0000000000133190 XMM06=4fda316b135da52b0000000000131f80 XMM07=fb795ef6d657705600000000001222b0 XMM08=2c67c8bc2e329bc3000000000011aa40 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000