syzkaller login: [ 38.834966] BUG: Bad rss-counter state mm:00000000e8192729 type:MM_FILEPAGES val:33 [ 38.836190] BUG: Bad rss-counter state mm:00000000e8192729 type:MM_ANONPAGES val:22 [ 38.880935] ================================================================== [ 38.881703] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.882458] Read of size 8 at addr ffff888006b0ed08 by task sshd/227 [ 38.883079] [ 38.883323] CPU: 0 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.884034] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.884829] Call Trace: [ 38.885093] [ 38.885327] dump_stack_lvl+0x91/0xf0 [ 38.885735] print_report+0xcc/0x620 [ 38.886134] ? __virt_addr_valid+0x102/0x340 [ 38.886586] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.887090] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.887616] kasan_report+0xbe/0xf0 [ 38.888008] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.888514] vma_interval_tree_remove+0xc75/0xec0 [ 38.889005] vma_prepare+0xc54/0x11a0 [ 38.889394] __split_vma+0x5af/0x950 [ 38.889779] ? __pfx___split_vma+0x10/0x10 [ 38.890211] ? find_held_lock+0x2c/0x110 [ 38.890635] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.891094] ? lock_is_held_type+0x9f/0x120 [ 38.891539] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.892036] ? mtree_range_walk+0x632/0x900 [ 38.892489] ? mas_walk+0x5c7/0x7c0 [ 38.892876] do_vmi_munmap+0x1f1/0x2b0 [ 38.893311] mmap_region+0x1f9/0x2660 [ 38.893705] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.894117] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.894712] ? __pfx_lock_acquire+0x10/0x10 [ 38.895151] ? __pfx_mmap_region+0x10/0x10 [ 38.895593] ? security_mmap_addr+0x7d/0xa0 [ 38.896025] ? get_unmapped_area+0x1f5/0x3f0 [ 38.896468] do_mmap+0x854/0xf00 [ 38.896827] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.897234] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.897701] ksys_mmap_pgoff+0x3af/0x500 [ 38.898118] do_syscall_64+0x3f/0x90 [ 38.898508] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.899036] RIP: 0033:0x7fe1c060cd82 [ 38.899407] 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 [ 38.901179] RSP: 002b:00007fff7b5aa5d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.901921] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe1c060cd82 [ 38.902622] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe1bfa46000 [ 38.903328] RBP: 00007fe1bfa46000 R08: 0000000000000009 R09: 0000000000001000 [ 38.904041] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a7e40ecec0 [ 38.904739] R13: 00007fff7b5aa5f0 R14: 00007fff7b5aa620 R15: 00007fff7b5aa980 [ 38.905459] [ 38.905698] [ 38.905879] Allocated by task 220: [ 38.906241] kasan_save_stack+0x22/0x50 [ 38.906658] kasan_set_track+0x25/0x30 [ 38.907074] __kasan_slab_alloc+0x59/0x70 [ 38.907510] kmem_cache_alloc+0x16b/0x370 [ 38.907963] vm_area_dup+0x20/0x160 [ 38.908345] __split_vma+0x170/0x950 [ 38.908730] split_vma+0xc6/0x110 [ 38.909102] mprotect_fixup+0x8d2/0xb30 [ 38.909516] do_mprotect_pkey+0x87e/0xd40 [ 38.909943] __x64_sys_mprotect+0x78/0xc0 [ 38.910370] do_syscall_64+0x3f/0x90 [ 38.910763] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.911297] [ 38.911475] Freed by task 19: [ 38.911813] kasan_save_stack+0x22/0x50 [ 38.912230] kasan_set_track+0x25/0x30 [ 38.912638] kasan_save_free_info+0x2b/0x50 [ 38.913078] __kasan_slab_free+0x10a/0x190 [ 38.913525] kmem_cache_free+0x10d/0x4d0 [ 38.913941] rcu_core+0x8c8/0x2860 [ 38.914312] __do_softirq+0x1b7/0x7d4 [ 38.914708] [ 38.914885] Last potentially related work creation: [ 38.915368] kasan_save_stack+0x22/0x50 [ 38.915798] __kasan_record_aux_stack+0x8e/0xa0 [ 38.916273] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.916811] remove_vma+0x139/0x170 [ 38.917183] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.917647] do_vmi_munmap+0x1f1/0x2b0 [ 38.918055] __vm_munmap+0x138/0x3a0 [ 38.918438] __x64_sys_munmap+0x59/0x80 [ 38.918852] do_syscall_64+0x3f/0x90 [ 38.919243] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.919796] [ 38.919974] The buggy address belongs to the object at ffff888006b0ecb0 [ 38.919974] which belongs to the cache vm_area_struct of size 168 [ 38.921205] The buggy address is located 88 bytes inside of [ 38.921205] freed 168-byte region [ffff888006b0ecb0, ffff888006b0ed58) [ 38.922385] [ 38.922562] The buggy address belongs to the physical page: [ 38.923108] page:00000000062cd9ee refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x6b0e [ 38.924006] memcg:ffff888006b08101 [ 38.924359] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.924889] page_type: 0xffffffff() [ 38.925260] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.926024] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888006b08101 [ 38.926777] page dumped because: kasan: bad access detected [ 38.927330] [ 38.927507] Memory state around the buggy address: [ 38.928003] ffff888006b0ec00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 38.928713] ffff888006b0ec80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 38.929433] >ffff888006b0ed00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 38.930149] ^ [ 38.930518] ffff888006b0ed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 38.931237] ffff888006b0ee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 38.931963] ================================================================== [ 38.932860] Disabling lock debugging due to kernel taint [ 40.552925] BUG: Bad rss-counter state mm:0000000000f7c84c type:MM_FILEPAGES val:33 [ 40.553675] BUG: Bad rss-counter state mm:0000000000f7c84c type:MM_ANONPAGES val:22 [ 40.933180] BUG: Bad rss-counter state mm:000000008ba4cc6e type:MM_FILEPAGES val:33 [ 40.934299] BUG: Bad rss-counter state mm:000000008ba4cc6e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48119' (ECDSA) to the list of known hosts. 2023/06/20 19:30:51 fuzzer started 2023/06/20 19:30:51 dialing manager at localhost:36067 2023/06/20 19:30:51 checking machine... 2023/06/20 19:30:51 checking revisions... [ 41.632819] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:30:51 testing simple program... [ 41.683573] cgroup: Unknown subsys name 'net' [ 41.731681] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:30:51 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff852ca120 RCX=0000000000000000 RDX=ffff8880141fd1c0 RSI=ffffffff81eead7f RDI=ffff88800df36480 RBP=dffffc0000000000 RSP=ffff8880166c78c0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0030733a745f6c65 R12=000000000000001e R13=ffff88800df36480 R14=ffff888015cd8008 R15=1ffff11002cd8f1d RIP=ffffffff81eead86 RFL=00000293 [--S-A-C] 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 00007fb954085700 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=00007ffcdf8e0278 CR3=000000000ebee000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3633325b646873732031353a3033 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383538 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffed1001eabf80 RBX=ffffed1001eabf81 RCX=ffffffff818ea53f RDX=ffffed1001eabf81 RSI=0000000000000004 RDI=ffff88800f55fc00 RBP=ffffed1001eabf80 RSP=ffff888006b7fc48 R8 =0000000000000000 R9 =ffffed1001eabf80 R10=ffff88800f55fc03 R11=0000000000000000 R12=ffff88800f55fc00 R13=0000000000004000 R14=0000000000000000 R15=00000000fffffff2 RIP=ffffffff8180f189 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 00007f938ecbe900 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=00007f938e1311d8 CR3=000000000ea9e000 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=10e1128ec343caa4ae4ab4dc4efeca7a XMM02=000000000011ae70eff9b2d0a8fce9cb XMM03=000000000011af402c67c8bc2e329bc3 XMM04=9633aa0b536480cb00000000000ae988 XMM05=e1a78160076f658f00000000001325f0 XMM06=e8008b1642ea3e600000000000131320 XMM07=e042d86d42eb936e0000000000121b20 XMM08=d3087176babce026000000000011af40 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000