syzkaller login: [ 30.965016] BUG: Bad rss-counter state mm:0000000051793bc4 type:MM_FILEPAGES val:33 [ 30.966030] BUG: Bad rss-counter state mm:0000000051793bc4 type:MM_ANONPAGES val:22 [ 31.131954] ================================================================== [ 31.133061] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.134053] Read of size 8 at addr ffff888017fc3798 by task sshd/220 [ 31.134930] [ 31.135153] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.136028] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.137089] Call Trace: [ 31.137409] [ 31.137696] dump_stack_lvl+0x91/0xf0 [ 31.138181] print_report+0xcc/0x620 [ 31.138691] ? __virt_addr_valid+0x102/0x340 [ 31.139253] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.139867] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.140492] kasan_report+0xbe/0xf0 [ 31.141004] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.141627] vma_interval_tree_remove+0xc75/0xec0 [ 31.142228] vma_prepare+0xc54/0x11a0 [ 31.142707] __split_vma+0x5af/0x950 [ 31.143181] ? __pfx___split_vma+0x10/0x10 [ 31.143731] ? find_held_lock+0x2c/0x110 [ 31.144248] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.144828] ? lock_is_held_type+0x9f/0x120 [ 31.145364] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.145968] ? mtree_range_walk+0x632/0x900 [ 31.146531] ? mas_walk+0x5c7/0x7c0 [ 31.147015] do_vmi_munmap+0x1f1/0x2b0 [ 31.147514] mmap_region+0x1f9/0x2660 [ 31.148017] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.148527] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.149245] ? __pfx_lock_acquire+0x10/0x10 [ 31.149782] ? __pfx_mmap_region+0x10/0x10 [ 31.150306] ? security_mmap_addr+0x7d/0xa0 [ 31.150839] ? get_unmapped_area+0x1f5/0x3f0 [ 31.151390] do_mmap+0x854/0xf00 [ 31.151831] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.152334] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.152915] ksys_mmap_pgoff+0x3af/0x500 [ 31.153421] do_syscall_64+0x3f/0x90 [ 31.153895] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.154547] RIP: 0033:0x7f4071967d82 [ 31.155008] 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 [ 31.157126] RSP: 002b:00007ffc1f6c6bb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.158031] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4071967d82 [ 31.158877] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4070da1000 [ 31.159712] RBP: 00007f4070da1000 R08: 0000000000000009 R09: 0000000000001000 [ 31.160555] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557db74d3f70 [ 31.161393] R13: 00007ffc1f6c6bd0 R14: 00007ffc1f6c6c00 R15: 00007ffc1f6c6f60 [ 31.162240] [ 31.162535] [ 31.162748] Allocated by task 213: [ 31.163175] kasan_save_stack+0x22/0x50 [ 31.163680] kasan_set_track+0x25/0x30 [ 31.164175] __kasan_slab_alloc+0x59/0x70 [ 31.164713] kmem_cache_alloc+0x16b/0x370 [ 31.165232] vm_area_dup+0x20/0x160 [ 31.165684] __split_vma+0x170/0x950 [ 31.166148] split_vma+0xc6/0x110 [ 31.166581] mprotect_fixup+0x8d2/0xb30 [ 31.167079] do_mprotect_pkey+0x87e/0xd40 [ 31.167604] __x64_sys_mprotect+0x78/0xc0 [ 31.168123] do_syscall_64+0x3f/0x90 [ 31.168612] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.169253] [ 31.169471] Freed by task 213: [ 31.169865] kasan_save_stack+0x22/0x50 [ 31.170366] kasan_set_track+0x25/0x30 [ 31.170868] kasan_save_free_info+0x2b/0x50 [ 31.171395] __kasan_slab_free+0x10a/0x190 [ 31.171924] kmem_cache_free+0x10d/0x4d0 [ 31.172428] rcu_core+0x8c8/0x2860 [ 31.172894] __do_softirq+0x1b7/0x7d4 [ 31.173371] [ 31.173586] Last potentially related work creation: [ 31.174163] kasan_save_stack+0x22/0x50 [ 31.174663] __kasan_record_aux_stack+0x8e/0xa0 [ 31.175239] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.175874] remove_vma+0x139/0x170 [ 31.176326] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.176908] do_vmi_munmap+0x1f1/0x2b0 [ 31.177391] __vm_munmap+0x138/0x3a0 [ 31.177856] __x64_sys_munmap+0x59/0x80 [ 31.178361] do_syscall_64+0x3f/0x90 [ 31.178838] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.179480] [ 31.179698] The buggy address belongs to the object at ffff888017fc3740 [ 31.179698] which belongs to the cache vm_area_struct of size 168 [ 31.181172] The buggy address is located 88 bytes inside of [ 31.181172] freed 168-byte region [ffff888017fc3740, ffff888017fc37e8) [ 31.182578] [ 31.182792] The buggy address belongs to the physical page: [ 31.183446] page:0000000057ff24a3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17fc3 [ 31.184529] memcg:ffff88800c531501 [ 31.184975] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.185624] page_type: 0xffffffff() [ 31.186070] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.186985] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c531501 [ 31.187892] page dumped because: kasan: bad access detected [ 31.188561] [ 31.188776] Memory state around the buggy address: [ 31.189357] ffff888017fc3680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.190209] ffff888017fc3700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.191069] >ffff888017fc3780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.191915] ^ [ 31.192406] ffff888017fc3800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.193266] ffff888017fc3880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.194116] ================================================================== [ 31.195227] Disabling lock debugging due to kernel taint [ 33.074655] BUG: Bad rss-counter state mm:000000006ca94c64 type:MM_FILEPAGES val:33 [ 33.076165] BUG: Bad rss-counter state mm:000000006ca94c64 type:MM_ANONPAGES val:22 [ 33.563541] BUG: Bad rss-counter state mm:000000006ee7a32b type:MM_FILEPAGES val:33 [ 33.564752] BUG: Bad rss-counter state mm:000000006ee7a32b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31077' (ECDSA) to the list of known hosts. 2023/06/20 23:01:15 fuzzer started 2023/06/20 23:01:15 dialing manager at localhost:36067 2023/06/20 23:01:15 checking machine... 2023/06/20 23:01:15 checking revisions... [ 34.269316] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:01:15 testing simple program... [ 34.320096] cgroup: Unknown subsys name 'net' [ 34.372941] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:01:15 Registers: info registers vcpu 0 RAX=ffffffff8449e4aa RBX=ffffffff860499f4 RCX=ffffffff8449e4a5 RDX=0000000000000000 RSI=ffffffff864aa51a RDI=ffffffff860499d0 RBP=ffffffff860499d0 RSP=ffff8880167c6ee0 R8 =ffffffff864aa51a R9 =ffff8880167c6fd8 R10=0000000000038001 R11=00000000000b3c03 R12=ffffffff860499f0 R13=ffffffff860499d0 R14=ffffffff860499d0 R15=dffffc0000000000 RIP=ffffffff8112fca2 RFL=00000202 [-------] 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 00007fb1a347f900 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=00007fb1a345e020 CR3=000000000cc5a000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fa2645fda20 CR3=000000000e738000 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=2035313a31303a3332203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a31303a3332203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000