syzkaller login: [ 55.184787] BUG: Bad rss-counter state mm:00000000ef2c3e9b type:MM_FILEPAGES val:33 [ 55.185482] BUG: Bad rss-counter state mm:00000000ef2c3e9b type:MM_ANONPAGES val:22 [ 55.219280] ================================================================== [ 55.219995] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 55.220792] Read of size 8 at addr ffff8880175b3058 by task sshd/220 [ 55.221326] [ 55.221483] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 55.222080] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 55.222758] Call Trace: [ 55.223002] [ 55.223209] dump_stack_lvl+0x91/0xf0 [ 55.223561] print_report+0xcc/0x620 [ 55.223965] ? __virt_addr_valid+0x102/0x340 [ 55.224354] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.224791] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.225232] kasan_report+0xbe/0xf0 [ 55.225571] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.226015] vma_interval_tree_remove+0xc75/0xec0 [ 55.226440] vma_prepare+0xc54/0x11a0 [ 55.226780] __split_vma+0x5af/0x950 [ 55.227118] ? __pfx___split_vma+0x10/0x10 [ 55.227503] ? find_held_lock+0x2c/0x110 [ 55.227901] do_vmi_align_munmap+0x2ba/0x11f0 [ 55.228298] ? lock_is_held_type+0x9f/0x120 [ 55.228688] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 55.229127] ? mtree_range_walk+0x632/0x900 [ 55.229524] ? mas_walk+0x5c7/0x7c0 [ 55.229867] do_vmi_munmap+0x1f1/0x2b0 [ 55.230213] mmap_region+0x1f9/0x2660 [ 55.230553] ? vm_mmap_pgoff+0x15c/0x3a0 [ 55.230919] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 55.231430] ? __pfx_lock_acquire+0x10/0x10 [ 55.231845] ? __pfx_mmap_region+0x10/0x10 [ 55.232219] ? security_mmap_addr+0x7d/0xa0 [ 55.232599] ? get_unmapped_area+0x1f5/0x3f0 [ 55.232994] do_mmap+0x854/0xf00 [ 55.233308] vm_mmap_pgoff+0x1a6/0x3a0 [ 55.233662] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 55.234059] ksys_mmap_pgoff+0x3af/0x500 [ 55.234433] do_syscall_64+0x3f/0x90 [ 55.234767] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.235231] RIP: 0033:0x7fc5401d2d82 [ 55.235567] 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 [ 55.237138] RSP: 002b:00007ffececff698 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 55.237801] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc5401d2d82 [ 55.238408] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc53f60c000 [ 55.239034] RBP: 00007fc53f60c000 R08: 0000000000000009 R09: 0000000000001000 [ 55.239661] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556acc7bdf70 [ 55.240281] R13: 00007ffececff6b0 R14: 00007ffececff6e0 R15: 00007ffececffa40 [ 55.240905] [ 55.241119] [ 55.241271] Allocated by task 213: [ 55.241588] kasan_save_stack+0x22/0x50 [ 55.241953] kasan_set_track+0x25/0x30 [ 55.242298] __kasan_slab_alloc+0x59/0x70 [ 55.242665] kmem_cache_alloc+0x16b/0x370 [ 55.243035] vm_area_dup+0x20/0x160 [ 55.243355] __split_vma+0x170/0x950 [ 55.243705] split_vma+0xc6/0x110 [ 55.244018] mprotect_fixup+0x8d2/0xb30 [ 55.244382] do_mprotect_pkey+0x87e/0xd40 [ 55.244754] __x64_sys_mprotect+0x78/0xc0 [ 55.245284] do_syscall_64+0x3f/0x90 [ 55.245626] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.246101] [ 55.246256] Freed by task 213: [ 55.246543] kasan_save_stack+0x22/0x50 [ 55.246903] kasan_set_track+0x25/0x30 [ 55.247265] kasan_save_free_info+0x2b/0x50 [ 55.247665] __kasan_slab_free+0x10a/0x190 [ 55.248038] kmem_cache_free+0x10d/0x4d0 [ 55.248399] rcu_core+0x8c8/0x2860 [ 55.248712] __do_softirq+0x1b7/0x7d4 [ 55.249055] [ 55.249206] Last potentially related work creation: [ 55.249621] kasan_save_stack+0x22/0x50 [ 55.249975] __kasan_record_aux_stack+0x8e/0xa0 [ 55.250384] __call_rcu_common.constprop.0+0x6a/0xb90 [ 55.250845] remove_vma+0x139/0x170 [ 55.251170] do_vmi_align_munmap+0xd4a/0x11f0 [ 55.251568] do_vmi_munmap+0x1f1/0x2b0 [ 55.251950] __vm_munmap+0x138/0x3a0 [ 55.252279] __x64_sys_munmap+0x59/0x80 [ 55.252629] do_syscall_64+0x3f/0x90 [ 55.252961] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.253422] [ 55.253571] The buggy address belongs to the object at ffff8880175b3000 [ 55.253571] which belongs to the cache vm_area_struct of size 168 [ 55.254593] The buggy address is located 88 bytes inside of [ 55.254593] freed 168-byte region [ffff8880175b3000, ffff8880175b30a8) [ 55.255577] [ 55.255784] The buggy address belongs to the physical page: [ 55.256249] page:0000000092f27429 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x175b3 [ 55.257031] memcg:ffff8880175b4001 [ 55.257338] flags: 0x100000000000200(slab|node=0|zone=1) [ 55.257805] page_type: 0xffffffff() [ 55.258121] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 55.258755] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880175b4001 [ 55.259399] page dumped because: kasan: bad access detected [ 55.259900] [ 55.260056] Memory state around the buggy address: [ 55.260464] ffff8880175b2f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 55.261070] ffff8880175b2f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 55.261682] >ffff8880175b3000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 55.262281] ^ [ 55.262799] ffff8880175b3080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 55.263412] ffff8880175b3100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 55.264036] ================================================================== [ 55.264837] Disabling lock debugging due to kernel taint [ 56.645944] BUG: Bad rss-counter state mm:000000009d1ea398 type:MM_FILEPAGES val:33 [ 56.646586] BUG: Bad rss-counter state mm:000000009d1ea398 type:MM_ANONPAGES val:22 [ 57.007181] BUG: Bad rss-counter state mm:000000005303695d type:MM_FILEPAGES val:33 [ 57.007966] BUG: Bad rss-counter state mm:000000005303695d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2876' (ECDSA) to the list of known hosts. 2023/06/20 08:38:25 fuzzer started 2023/06/20 08:38:25 dialing manager at localhost:44161 2023/06/20 08:38:25 checking machine... 2023/06/20 08:38:25 checking revisions... [ 57.582969] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:38:25 testing simple program... [ 57.630280] cgroup: Unknown subsys name 'net' [ 57.666115] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:38:00 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fff0ae4d468 CR3=000000000e7b6000 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=2034323a38333a3830203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a38333a3830203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806c400000 RBX=00000000e788845f RCX=ffff88806c8422f8 RDX=000000000000000d RSI=0000000000000002 RDI=000000001dfdaf8f RBP=ffff88800da03d80 RSP=ffff888019b37a28 R8 =00000000b60ee24a R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000001 R13=0000000000000cc0 R14=ffff888019b37a90 R15=000000000000000d RIP=ffffffff82270f2d 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 00007fee286ce900 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=00007fee28c83650 CR3=0000000019dfe000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000