syzkaller login: [ 30.622789] BUG: Bad rss-counter state mm:000000006d0fc23a type:MM_FILEPAGES val:33 [ 30.624410] BUG: Bad rss-counter state mm:000000006d0fc23a type:MM_ANONPAGES val:22 [ 30.844571] ================================================================== [ 30.846049] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.855631] Read of size 8 at addr ffff8880159436b0 by task sshd/223 [ 30.856836] [ 30.857145] CPU: 1 PID: 223 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.858529] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.860098] Call Trace: [ 30.860582] [ 30.860995] dump_stack_lvl+0x91/0xf0 [ 30.861725] print_report+0xcc/0x620 [ 30.862465] ? __virt_addr_valid+0x102/0x340 [ 30.863304] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.864234] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.865169] kasan_report+0xbe/0xf0 [ 30.865872] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.866859] vma_interval_tree_remove+0xc75/0xec0 [ 30.867772] vma_prepare+0xc54/0x11a0 [ 30.868498] __split_vma+0x5af/0x950 [ 30.869202] ? __pfx___split_vma+0x10/0x10 [ 30.869997] ? find_held_lock+0x2c/0x110 [ 30.870782] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.871625] ? lock_is_held_type+0x9f/0x120 [ 30.872437] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.873350] ? mtree_range_walk+0x632/0x900 [ 30.874168] ? mas_walk+0x5c7/0x7c0 [ 30.874879] do_vmi_munmap+0x1f1/0x2b0 [ 30.875612] mmap_region+0x1f9/0x2660 [ 30.876579] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.877783] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.878193] ? __pfx_lock_acquire+0x10/0x10 [ 30.878517] ? __pfx_mmap_region+0x10/0x10 [ 30.878818] ? security_mmap_addr+0x7d/0xa0 [ 30.879134] ? get_unmapped_area+0x1f5/0x3f0 [ 30.879446] do_mmap+0x854/0xf00 [ 30.879707] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.879994] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.880316] ksys_mmap_pgoff+0x3af/0x500 [ 30.880614] do_syscall_64+0x3f/0x90 [ 30.880893] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.881272] RIP: 0033:0x7f0b6c42bd82 [ 30.881532] 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 [ 30.886793] RSP: 002b:00007ffeb50e46b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.887304] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0b6c42bd82 [ 30.887792] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0b6b865000 [ 30.888268] RBP: 00007f0b6b865000 R08: 0000000000000009 R09: 0000000000001000 [ 30.888756] R10: 0000000000000812 R11: 0000000000000206 R12: 000055871d024ec0 [ 30.889232] R13: 00007ffeb50e46d0 R14: 00007ffeb50e4700 R15: 00007ffeb50e4a60 [ 30.889733] [ 30.889905] [ 30.890024] Allocated by task 214: [ 30.890274] kasan_save_stack+0x22/0x50 [ 30.894565] kasan_set_track+0x25/0x30 [ 30.894850] __kasan_slab_alloc+0x59/0x70 [ 30.895141] kmem_cache_alloc+0x16b/0x370 [ 30.895435] vm_area_dup+0x20/0x160 [ 30.895698] __split_vma+0x170/0x950 [ 30.895965] split_vma+0xc6/0x110 [ 30.896216] mprotect_fixup+0x8d2/0xb30 [ 30.896498] do_mprotect_pkey+0x87e/0xd40 [ 30.896797] __x64_sys_mprotect+0x78/0xc0 [ 30.897093] do_syscall_64+0x3f/0x90 [ 30.897358] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.897725] [ 30.897851] Freed by task 211: [ 30.898068] kasan_save_stack+0x22/0x50 [ 30.898357] kasan_set_track+0x25/0x30 [ 30.898659] kasan_save_free_info+0x2b/0x50 [ 30.898980] __kasan_slab_free+0x10a/0x190 [ 30.899285] kmem_cache_free+0x10d/0x4d0 [ 30.899574] rcu_core+0x8c8/0x2860 [ 30.899834] __do_softirq+0x1b7/0x7d4 [ 30.900105] [ 30.900226] Last potentially related work creation: [ 30.900556] kasan_save_stack+0x22/0x50 [ 30.900846] __kasan_record_aux_stack+0x8e/0xa0 [ 30.901173] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.901538] remove_vma+0x139/0x170 [ 30.901800] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.902120] do_vmi_munmap+0x1f1/0x2b0 [ 30.902424] __vm_munmap+0x138/0x3a0 [ 30.902704] __x64_sys_munmap+0x59/0x80 [ 30.902987] do_syscall_64+0x3f/0x90 [ 30.903259] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.903621] [ 30.903740] The buggy address belongs to the object at ffff888015943658 [ 30.903740] which belongs to the cache vm_area_struct of size 168 [ 30.904564] The buggy address is located 88 bytes inside of [ 30.904564] freed 168-byte region [ffff888015943658, ffff888015943700) [ 30.905351] [ 30.905485] The buggy address belongs to the physical page: [ 30.905854] page:000000003b207ae1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15943 [ 30.906535] memcg:ffff8880194a7901 [ 30.906778] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.907146] page_type: 0xffffffff() [ 30.907405] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.907926] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880194a7901 [ 30.908446] page dumped because: kasan: bad access detected [ 30.908819] [ 30.908940] Memory state around the buggy address: [ 30.909272] ffff888015943580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.909764] ffff888015943600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.910243] >ffff888015943680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.910740] ^ [ 30.911067] ffff888015943700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.911553] ffff888015943780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.912035] ================================================================== [ 30.912932] Disabling lock debugging due to kernel taint [ 35.176736] BUG: Bad rss-counter state mm:0000000024db2d78 type:MM_FILEPAGES val:33 [ 35.177312] BUG: Bad rss-counter state mm:0000000024db2d78 type:MM_ANONPAGES val:22 [ 35.975505] BUG: Bad rss-counter state mm:00000000fb1ee847 type:MM_FILEPAGES val:33 [ 35.976212] BUG: Bad rss-counter state mm:00000000fb1ee847 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29301' (ECDSA) to the list of known hosts. 2023/06/21 10:25:46 fuzzer started 2023/06/21 10:25:46 dialing manager at localhost:36067 2023/06/21 10:25:46 checking machine... 2023/06/21 10:25:46 checking revisions... [ 36.875650] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:25:46 testing simple program... [ 36.915610] cgroup: Unknown subsys name 'net' [ 37.000461] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:25:46 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8453684b RDX=fffffbfff0ac3014 RSI=0000000000000004 RDI=ffffffff85618098 RBP=ffffffff85618098 RSP=ffff888008da7bb0 R8 =0000000000000000 R9 =fffffbfff0ac3013 R10=ffffffff8561809b R11=0000000000000000 R12=0000000000000003 R13=fffffbfff0ac3013 R14=0000000000000001 R15=1ffff110011b4f77 RIP=ffffffff845368c8 RFL=00000002 [-------] 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=00007ffd8aa7f7d8 CR3=0000000005482000 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=00007f67a9865510000055965bdeb790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=fffffffffba0ed00 RBX=ffffffff85dfe190 RCX=ffffffff8180ce88 RDX=0000000000000000 RSI=ffffffff86139066 RDI=ffffffff85dfe158 RBP=ffffffff85dfe180 RSP=ffff888016f6f480 R8 =ffffffff86139066 R9 =ffff888016f6f578 R10=0000000000038001 R11=0000000000020de5 R12=ffffffff85dfe1a4 R13=ffffffff85dfe158 R14=ffffffff85dfe17c R15=dffffc0000000000 RIP=ffffffff8112fc93 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 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=00007f880b587260 CR3=000000000c48e000 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=756e696c2d34365f3638782f62696c2f XMM01=6f732e3562726b62696c2f756e672d78 XMM02=00332e6f732e3562726b62696c2f756e XMM03=672d78756e696c2d34365f3638782f62 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000