syzkaller login: [ 29.496892] BUG: Bad rss-counter state mm:00000000bcffbdbf type:MM_FILEPAGES val:33 [ 29.498062] BUG: Bad rss-counter state mm:00000000bcffbdbf type:MM_ANONPAGES val:22 [ 29.541031] ================================================================== [ 29.542218] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.543502] Read of size 8 at addr ffff88800d91b798 by task sshd/220 [ 29.544509] [ 29.544791] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.545856] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.547089] Call Trace: [ 29.547495] [ 29.547854] dump_stack_lvl+0x91/0xf0 [ 29.548485] print_report+0xcc/0x620 [ 29.549089] ? __virt_addr_valid+0x102/0x340 [ 29.549809] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.550572] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.551343] kasan_report+0xbe/0xf0 [ 29.551929] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.552739] vma_interval_tree_remove+0xc75/0xec0 [ 29.553494] vma_prepare+0xc54/0x11a0 [ 29.554100] __split_vma+0x5af/0x950 [ 29.554681] ? __pfx___split_vma+0x10/0x10 [ 29.555336] ? find_held_lock+0x2c/0x110 [ 29.555985] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.556704] ? lock_is_held_type+0x9f/0x120 [ 29.557381] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.558133] ? mtree_range_walk+0x632/0x900 [ 29.558748] ? mas_walk+0x5c7/0x7c0 [ 29.559247] do_vmi_munmap+0x1f1/0x2b0 [ 29.559767] mmap_region+0x1f9/0x2660 [ 29.560268] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.560876] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.561649] ? __pfx_lock_acquire+0x10/0x10 [ 29.562219] ? __pfx_mmap_region+0x10/0x10 [ 29.562794] ? security_mmap_addr+0x7d/0xa0 [ 29.563383] ? get_unmapped_area+0x1f5/0x3f0 [ 29.563972] do_mmap+0x854/0xf00 [ 29.564467] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.565018] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.565641] ksys_mmap_pgoff+0x3af/0x500 [ 29.566208] do_syscall_64+0x3f/0x90 [ 29.566730] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.567444] RIP: 0033:0x7f94527d7d82 [ 29.567948] 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 [ 29.570333] RSP: 002b:00007ffd2f487558 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.571357] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f94527d7d82 [ 29.572399] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9451c11000 [ 29.573459] RBP: 00007f9451c11000 R08: 0000000000000009 R09: 0000000000001000 [ 29.574499] R10: 0000000000000812 R11: 0000000000000206 R12: 00005585a93bfec0 [ 29.575479] R13: 00007ffd2f487570 R14: 00007ffd2f4875a0 R15: 00007ffd2f487900 [ 29.576534] [ 29.576886] [ 29.577144] Allocated by task 213: [ 29.577645] kasan_save_stack+0x22/0x50 [ 29.578187] kasan_set_track+0x25/0x30 [ 29.578703] __kasan_slab_alloc+0x59/0x70 [ 29.579248] kmem_cache_alloc+0x16b/0x370 [ 29.579794] vm_area_dup+0x20/0x160 [ 29.580332] __split_vma+0x170/0x950 [ 29.580881] split_vma+0xc6/0x110 [ 29.581401] mprotect_fixup+0x8d2/0xb30 [ 29.581990] do_mprotect_pkey+0x87e/0xd40 [ 29.582629] __x64_sys_mprotect+0x78/0xc0 [ 29.583292] do_syscall_64+0x3f/0x90 [ 29.583865] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.584660] [ 29.584922] Freed by task 213: [ 29.585388] kasan_save_stack+0x22/0x50 [ 29.585958] kasan_set_track+0x25/0x30 [ 29.586511] kasan_save_free_info+0x2b/0x50 [ 29.587114] __kasan_slab_free+0x10a/0x190 [ 29.587710] kmem_cache_free+0x10d/0x4d0 [ 29.588309] rcu_core+0x8c8/0x2860 [ 29.588819] __do_softirq+0x1b7/0x7d4 [ 29.589373] [ 29.589617] Last potentially related work creation: [ 29.590269] kasan_save_stack+0x22/0x50 [ 29.590834] __kasan_record_aux_stack+0x8e/0xa0 [ 29.591532] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.592347] remove_vma+0x139/0x170 [ 29.592895] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.593570] do_vmi_munmap+0x1f1/0x2b0 [ 29.594154] __vm_munmap+0x138/0x3a0 [ 29.594719] __x64_sys_munmap+0x59/0x80 [ 29.595315] do_syscall_64+0x3f/0x90 [ 29.595878] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.596658] [ 29.596922] Second to last potentially related work creation: [ 29.597758] kasan_save_stack+0x22/0x50 [ 29.598366] __kasan_record_aux_stack+0x8e/0xa0 [ 29.599060] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.599834] remove_vma+0x139/0x170 [ 29.600355] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.600941] do_vmi_munmap+0x1f1/0x2b0 [ 29.601449] __vm_munmap+0x138/0x3a0 [ 29.601947] __x64_sys_munmap+0x59/0x80 [ 29.602476] do_syscall_64+0x3f/0x90 [ 29.602987] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.603679] [ 29.603919] The buggy address belongs to the object at ffff88800d91b740 [ 29.603919] which belongs to the cache vm_area_struct of size 168 [ 29.605583] The buggy address is located 88 bytes inside of [ 29.605583] freed 168-byte region [ffff88800d91b740, ffff88800d91b7e8) [ 29.607108] [ 29.607354] The buggy address belongs to the physical page: [ 29.608063] page:00000000c3f06294 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd91b [ 29.609269] memcg:ffff88800e11a401 [ 29.609752] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.610585] page_type: 0xffffffff() [ 29.611163] raw: 0100000000000200 ffff88800879fc80 ffffea0000382ac0 dead000000000008 [ 29.612366] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e11a401 [ 29.613483] page dumped because: kasan: bad access detected [ 29.614306] [ 29.614555] Memory state around the buggy address: [ 29.615221] ffff88800d91b680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.616210] ffff88800d91b700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 29.617205] >ffff88800d91b780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 29.618270] ^ [ 29.618835] ffff88800d91b800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 29.619811] ffff88800d91b880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 29.620809] ================================================================== [ 29.621994] Disabling lock debugging due to kernel taint [ 31.472986] BUG: Bad rss-counter state mm:0000000038352692 type:MM_FILEPAGES val:33 [ 31.474260] BUG: Bad rss-counter state mm:0000000038352692 type:MM_ANONPAGES val:22 [ 32.038527] BUG: Bad rss-counter state mm:000000001f2be814 type:MM_FILEPAGES val:33 [ 32.039668] BUG: Bad rss-counter state mm:000000001f2be814 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6462' (ECDSA) to the list of known hosts. 2023/06/19 18:46:08 fuzzer started 2023/06/19 18:46:08 dialing manager at localhost:44161 2023/06/19 18:46:08 checking machine... 2023/06/19 18:46:08 checking revisions... [ 32.679224] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:46:08 testing simple program... [ 32.732809] cgroup: Unknown subsys name 'net' [ 32.771417] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:46:07 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=000055bd09fce390 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000008000 RDI=000055bd09fb1350 RBP=000055bd09fb1350 RSP=00007fffa8749ff8 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000246 R12=0000000000000200 R13=000055bd09fb1350 R14=0000000000008000 R15=0000000000000001 RIP=00007f97efde90f0 RFL=00000206 [-----P-] 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 00007f97ef929900 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=00007f97ef8dd01c CR3=000000000cb4c000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=ffff88806cf35000 RCX=ffffffff81534376 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff84517e4d RSP=ffff88800c4879f8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=ffff88806cf39500 R13=ffff888014663680 R14=0000000000000000 R15=0000000000000001 RIP=ffffffff8135b91f 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 00007f01f618f900 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=00007f01f55a9450 CR3=0000000008dbc000 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=31c2126d082020b1f345e8be03f228e4 XMM02=ec2efd57dc4c00df000000000011d968 XMM03=65c903ba6c730597000000000011da38 XMM04=81e4c4f11eeb678e00000000000ae988 XMM05=19e9129bd510f2350000000000135238 XMM06=d96f7bcab045fdc100000000001340a0 XMM07=e042d86d42eb936e0000000000124960 XMM08=65c903ba6c730597000000000011da38 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000