syzkaller login: [ 43.177411] BUG: Bad rss-counter state mm:0000000046721916 type:MM_FILEPAGES val:33 [ 43.178503] BUG: Bad rss-counter state mm:0000000046721916 type:MM_ANONPAGES val:22 [ 43.336933] ================================================================== [ 43.337878] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.338850] Read of size 8 at addr ffff88800e1093f8 by task sshd/219 [ 43.339636] [ 43.339862] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.340928] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.341933] Call Trace: [ 43.342261] <TASK> [ 43.342566] dump_stack_lvl+0x91/0xf0 [ 43.343076] print_report+0xcc/0x620 [ 43.343578] ? __virt_addr_valid+0x102/0x340 [ 43.344147] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.344809] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.345455] kasan_report+0xbe/0xf0 [ 43.345954] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.346593] vma_interval_tree_remove+0xc75/0xec0 [ 43.347224] vma_prepare+0xc54/0x11a0 [ 43.347712] __split_vma+0x5af/0x950 [ 43.348202] ? __pfx___split_vma+0x10/0x10 [ 43.348763] ? find_held_lock+0x2c/0x110 [ 43.349312] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.349895] ? lock_is_held_type+0x9f/0x120 [ 43.350456] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.351083] ? mtree_range_walk+0x632/0x900 [ 43.351653] ? mas_walk+0x5c7/0x7c0 [ 43.352146] do_vmi_munmap+0x1f1/0x2b0 [ 43.352653] mmap_region+0x1f9/0x2660 [ 43.353159] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.353708] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.354449] ? __pfx_lock_acquire+0x10/0x10 [ 43.355004] ? __pfx_mmap_region+0x10/0x10 [ 43.355551] ? security_mmap_addr+0x7d/0xa0 [ 43.356100] ? get_unmapped_area+0x1f5/0x3f0 [ 43.356669] do_mmap+0x854/0xf00 [ 43.357151] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.357658] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.358243] ksys_mmap_pgoff+0x3af/0x500 [ 43.358776] do_syscall_64+0x3f/0x90 [ 43.359267] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.359940] RIP: 0033:0x7fc8839ecd82 [ 43.360419] 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 [ 43.362616] RSP: 002b:00007fff9a5d2938 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.363508] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc8839ecd82 [ 43.364351] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc882e26000 [ 43.365229] RBP: 00007fc882e26000 R08: 0000000000000009 R09: 0000000000001000 [ 43.366071] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555c093d9ec0 [ 43.366939] R13: 00007fff9a5d2950 R14: 00007fff9a5d2980 R15: 00007fff9a5d2ce0 [ 43.367808] </TASK> [ 43.368099] [ 43.368318] Allocated by task 212: [ 43.368763] kasan_save_stack+0x22/0x50 [ 43.369273] kasan_set_track+0x25/0x30 [ 43.369767] __kasan_slab_alloc+0x59/0x70 [ 43.370320] kmem_cache_alloc+0x16b/0x370 [ 43.370854] vm_area_dup+0x20/0x160 [ 43.371306] __split_vma+0x170/0x950 [ 43.371789] split_vma+0xc6/0x110 [ 43.372228] mprotect_fixup+0x8d2/0xb30 [ 43.372737] do_mprotect_pkey+0x87e/0xd40 [ 43.373285] __x64_sys_mprotect+0x78/0xc0 [ 43.373817] do_syscall_64+0x3f/0x90 [ 43.374297] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.374959] [ 43.375182] Freed by task 212: [ 43.375585] kasan_save_stack+0x22/0x50 [ 43.376108] kasan_set_track+0x25/0x30 [ 43.376614] kasan_save_free_info+0x2b/0x50 [ 43.377179] __kasan_slab_free+0x10a/0x190 [ 43.377726] kmem_cache_free+0x10d/0x4d0 [ 43.378234] rcu_core+0x8c8/0x2860 [ 43.378696] __do_softirq+0x1b7/0x7d4 [ 43.379177] [ 43.379395] Last potentially related work creation: [ 43.379984] kasan_save_stack+0x22/0x50 [ 43.380489] __kasan_record_aux_stack+0x8e/0xa0 [ 43.381082] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.381734] remove_vma+0x139/0x170 [ 43.382192] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.382758] do_vmi_munmap+0x1f1/0x2b0 [ 43.383248] __vm_munmap+0x138/0x3a0 [ 43.383721] __x64_sys_munmap+0x59/0x80 [ 43.384221] do_syscall_64+0x3f/0x90 [ 43.384699] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.385359] [ 43.385577] Second to last potentially related work creation: [ 43.386263] kasan_save_stack+0x22/0x50 [ 43.386774] __kasan_record_aux_stack+0x8e/0xa0 [ 43.387361] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.388022] remove_vma+0x139/0x170 [ 43.388478] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.389063] do_vmi_munmap+0x1f1/0x2b0 [ 43.389556] mmap_region+0x1f9/0x2660 [ 43.390047] do_mmap+0x854/0xf00 [ 43.390492] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.390993] ksys_mmap_pgoff+0x3af/0x500 [ 43.391496] do_syscall_64+0x3f/0x90 [ 43.391982] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.392626] [ 43.392853] The buggy address belongs to the object at ffff88800e1093a0 [ 43.392853] which belongs to the cache vm_area_struct of size 168 [ 43.394335] The buggy address is located 88 bytes inside of [ 43.394335] freed 168-byte region [ffff88800e1093a0, ffff88800e109448) [ 43.395734] [ 43.395953] The buggy address belongs to the physical page: [ 43.396618] page:00000000b7d0d5ac refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe109 [ 43.397730] memcg:ffff88800eeee801 [ 43.398164] flags: 0x100000000000200(slab|node=0|zone=1) [ 43.398832] page_type: 0xffffffff() [ 43.399290] raw: 0100000000000200 ffff88800879fc80 ffffea00003b5600 dead000000000004 [ 43.400218] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eeee801 [ 43.401137] page dumped because: kasan: bad access detected [ 43.401797] [ 43.402015] Memory state around the buggy address: [ 43.402602] ffff88800e109280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 43.403461] ffff88800e109300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 43.404321] >ffff88800e109380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 43.405188] ^ [ 43.406031] ffff88800e109400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 43.406890] ffff88800e109480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 43.407742] ================================================================== [ 43.409117] Disabling lock debugging due to kernel taint [ 45.578227] BUG: Bad rss-counter state mm:0000000065d11553 type:MM_FILEPAGES val:33 [ 45.579492] BUG: Bad rss-counter state mm:0000000065d11553 type:MM_ANONPAGES val:22 [ 46.052685] BUG: Bad rss-counter state mm:000000003b2909bb type:MM_FILEPAGES val:33 [ 46.053906] BUG: Bad rss-counter state mm:000000003b2909bb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63047' (ECDSA) to the list of known hosts. 2023/06/19 21:44:10 fuzzer started 2023/06/19 21:44:10 dialing manager at localhost:44161 2023/06/19 21:44:10 checking machine... 2023/06/19 21:44:10 checking revisions... [ 46.825698] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:44:10 testing simple program... [ 46.876424] cgroup: Unknown subsys name 'net' [ 46.920703] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:44:05 Registers: info registers vcpu 0 RAX=00007f8b11901a99 RBX=0000000000000000 RCX=0000000000000d68 RDX=0000000000000015 RSI=00007f8b11901a84 RDI=0000564525ae11e0 RBP=00007fff797ad270 RSP=00007fff797acd20 R8 =0000000000000000 R9 =0000000000000002 R10=0000564525ae11e0 R11=0000000000000000 R12=00007fff797ad280 R13=00007f8b11901a84 R14=00007fff797ad3c0 R15=0000000000000015 RIP=00007f8b1122fd9d RFL=00000293 [--S-A-C] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f8b10dd2900 00000000 00000000 GS =0000 0000000000000000 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=00007f8b1138a0b0 CR3=0000000019ae8000 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=707465675f6c697475646f6d6d61705f XMM01=5f6d616e77707465675f6c697475646f XMM02=00000000000000000000000000000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=707465675f6c697475646f6d6d61705f XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007fc92ae51fa0 CR3=000000000d320000 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=fe1646faf0594b84b24477e7a9fec071 XMM02=ec2efd57dc4c00df000000000011dae0 XMM03=6eb3ceda28bf30d6000000000011dbb0 XMM04=e0cfb7b452598eff00000000000ae988 XMM05=19e9129bd510f2350000000000135128 XMM06=10a6b029ebdff4d40000000000134300 XMM07=e042d86d42eb936e00000000001247c8 XMM08=6eb3ceda28bf30d6000000000011dbb0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000