syzkaller login: [ 39.037313] BUG: Bad rss-counter state mm:0000000026d010eb type:MM_FILEPAGES val:33 [ 39.038903] BUG: Bad rss-counter state mm:0000000026d010eb type:MM_ANONPAGES val:22 [ 39.237387] ================================================================== [ 39.239592] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.241588] Read of size 8 at addr ffff88800e005310 by task sshd/222 [ 39.243208] [ 39.243643] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.245504] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.247754] Call Trace: [ 39.248378] [ 39.248878] dump_stack_lvl+0x91/0xf0 [ 39.249792] print_report+0xcc/0x620 [ 39.250692] ? __virt_addr_valid+0x102/0x340 [ 39.251682] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.252815] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.254060] kasan_report+0xbe/0xf0 [ 39.254904] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.256168] vma_interval_tree_remove+0xc75/0xec0 [ 39.257369] vma_prepare+0xc54/0x11a0 [ 39.258317] __split_vma+0x5af/0x950 [ 39.259203] ? __pfx___split_vma+0x10/0x10 [ 39.260262] ? find_held_lock+0x2c/0x110 [ 39.261262] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.262416] ? lock_is_held_type+0x9f/0x120 [ 39.263484] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.264689] ? mtree_range_walk+0x632/0x900 [ 39.265710] ? mas_walk+0x5c7/0x7c0 [ 39.267116] do_vmi_munmap+0x1f1/0x2b0 [ 39.267981] mmap_region+0x1f9/0x2660 [ 39.268970] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.270301] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.271715] ? __pfx_lock_acquire+0x10/0x10 [ 39.276810] ? __pfx_mmap_region+0x10/0x10 [ 39.277799] ? security_mmap_addr+0x7d/0xa0 [ 39.278808] ? get_unmapped_area+0x1f5/0x3f0 [ 39.279822] do_mmap+0x854/0xf00 [ 39.280699] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.281652] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.282746] ksys_mmap_pgoff+0x3af/0x500 [ 39.283716] do_syscall_64+0x3f/0x90 [ 39.284651] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.285879] RIP: 0033:0x7f72960efd82 [ 39.286754] 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 [ 39.291187] RSP: 002b:00007ffd3fdc89e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.292951] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f72960efd82 [ 39.294560] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7295529000 [ 39.296225] RBP: 00007f7295529000 R08: 0000000000000009 R09: 0000000000001000 [ 39.297834] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ec8a20bec0 [ 39.299499] R13: 00007ffd3fdc8a00 R14: 00007ffd3fdc8a30 R15: 00007ffd3fdc8d90 [ 39.301171] [ 39.301660] [ 39.302039] Allocated by task 213: [ 39.302785] kasan_save_stack+0x22/0x50 [ 39.303696] kasan_set_track+0x25/0x30 [ 39.304628] __kasan_slab_alloc+0x59/0x70 [ 39.305522] kmem_cache_alloc+0x16b/0x370 [ 39.306404] vm_area_dup+0x20/0x160 [ 39.307186] __split_vma+0x170/0x950 [ 39.307939] split_vma+0xc6/0x110 [ 39.308736] mprotect_fixup+0x8d2/0xb30 [ 39.309596] do_mprotect_pkey+0x87e/0xd40 [ 39.310483] __x64_sys_mprotect+0x78/0xc0 [ 39.311392] do_syscall_64+0x3f/0x90 [ 39.312253] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.313374] [ 39.313768] Freed by task 211: [ 39.314535] kasan_save_stack+0x22/0x50 [ 39.315505] kasan_set_track+0x25/0x30 [ 39.316510] kasan_save_free_info+0x2b/0x50 [ 39.317520] __kasan_slab_free+0x10a/0x190 [ 39.318523] kmem_cache_free+0x10d/0x4d0 [ 39.319482] rcu_core+0x8c8/0x2860 [ 39.320347] __do_softirq+0x1b7/0x7d4 [ 39.321309] [ 39.321680] Last potentially related work creation: [ 39.322845] kasan_save_stack+0x22/0x50 [ 39.323805] __kasan_record_aux_stack+0x8e/0xa0 [ 39.324914] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.326108] remove_vma+0x139/0x170 [ 39.326861] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.327851] do_vmi_munmap+0x1f1/0x2b0 [ 39.328754] __vm_munmap+0x138/0x3a0 [ 39.329590] __x64_sys_munmap+0x59/0x80 [ 39.330483] do_syscall_64+0x3f/0x90 [ 39.331321] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.332505] [ 39.332832] The buggy address belongs to the object at ffff88800e0052b8 [ 39.332832] which belongs to the cache vm_area_struct of size 168 [ 39.335645] The buggy address is located 88 bytes inside of [ 39.335645] freed 168-byte region [ffff88800e0052b8, ffff88800e005360) [ 39.338666] [ 39.339096] The buggy address belongs to the physical page: [ 39.340476] page:000000005b1592d2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe005 [ 39.342598] memcg:ffff88800d96d001 [ 39.343397] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.344712] page_type: 0xffffffff() [ 39.345537] raw: 0100000000000200 ffff88800879fc80 ffffea00003b8180 dead000000000008 [ 39.347342] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d96d001 [ 39.349184] page dumped because: kasan: bad access detected [ 39.350503] [ 39.350858] Memory state around the buggy address: [ 39.351958] ffff88800e005200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 39.353714] ffff88800e005280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 39.355460] >ffff88800e005300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 39.357237] ^ [ 39.358155] ffff88800e005380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.359842] ffff88800e005400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 39.361579] ================================================================== [ 39.372723] Disabling lock debugging due to kernel taint [ 44.488461] BUG: Bad rss-counter state mm:000000000e15ba51 type:MM_FILEPAGES val:33 [ 44.490096] BUG: Bad rss-counter state mm:000000000e15ba51 type:MM_ANONPAGES val:22 [ 45.129613] BUG: Bad rss-counter state mm:000000005cdca72d type:MM_FILEPAGES val:33 [ 45.130272] BUG: Bad rss-counter state mm:000000005cdca72d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38592' (ECDSA) to the list of known hosts. 2023/06/20 09:58:59 fuzzer started 2023/06/20 09:58:59 dialing manager at localhost:44161 2023/06/20 09:58:59 checking machine... 2023/06/20 09:58:59 checking revisions... 2023/06/20 09:58:59 testing simple program... [ 46.053628] kmemleak: Automatic memory scanning thread ended [ 46.093779] cgroup: Unknown subsys name 'net' [ 46.157135] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:58:59 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8453084b RDX=fffffbfff0ac3014 RSI=0000000000000004 RDI=ffffffff85618098 RBP=ffffffff85618098 RSP=ffff888008d87bb0 R8 =0000000000000000 R9 =fffffbfff0ac3013 R10=ffffffff8561809b R11=0000000000000000 R12=0000000000000003 R13=fffffbfff0ac3013 R14=0000000000000001 R15=1ffff110011b0f77 RIP=ffffffff845308c8 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=00007fca7bfec328 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=1ffff110028efe73 RCX=ffffffff812d8ec3 RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000000 RSP=ffff88801477f388 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8ed0 RFL=00000247 [---Z-PC] 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 00007f4cc9a6a900 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=00007f4cc9a6a6f8 CR3=000000000eb4a000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000