syzkaller login: [ 31.481933] BUG: Bad rss-counter state mm:00000000851330f6 type:MM_FILEPAGES val:33 [ 31.483237] BUG: Bad rss-counter state mm:00000000851330f6 type:MM_ANONPAGES val:22 [ 31.655156] ================================================================== [ 31.656290] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.657554] Read of size 8 at addr ffff88800f9fe798 by task sshd/220 [ 31.658389] [ 31.658615] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.659531] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.660578] Call Trace: [ 31.660913] [ 31.661210] dump_stack_lvl+0x91/0xf0 [ 31.661721] print_report+0xcc/0x620 [ 31.662238] ? __virt_addr_valid+0x102/0x340 [ 31.662811] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.663453] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.664094] kasan_report+0xbe/0xf0 [ 31.664598] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.665234] vma_interval_tree_remove+0xc75/0xec0 [ 31.665860] vma_prepare+0xc54/0x11a0 [ 31.666361] __split_vma+0x5af/0x950 [ 31.666861] ? __pfx___split_vma+0x10/0x10 [ 31.667389] ? find_held_lock+0x2c/0x110 [ 31.667903] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.668498] ? lock_is_held_type+0x9f/0x120 [ 31.669052] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.669679] ? mtree_range_walk+0x632/0x900 [ 31.670254] ? mas_walk+0x5c7/0x7c0 [ 31.670743] do_vmi_munmap+0x1f1/0x2b0 [ 31.671260] mmap_region+0x1f9/0x2660 [ 31.671756] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.672295] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.673047] ? __pfx_lock_acquire+0x10/0x10 [ 31.673598] ? __pfx_mmap_region+0x10/0x10 [ 31.674155] ? security_mmap_addr+0x7d/0xa0 [ 31.674710] ? get_unmapped_area+0x1f5/0x3f0 [ 31.675274] do_mmap+0x854/0xf00 [ 31.675733] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.676245] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.676833] ksys_mmap_pgoff+0x3af/0x500 [ 31.677380] do_syscall_64+0x3f/0x90 [ 31.677864] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.678514] RIP: 0033:0x7fc1da56ad82 [ 31.678987] 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 [ 31.681226] RSP: 002b:00007ffedab38c08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.682131] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc1da56ad82 [ 31.682978] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc1d99a4000 [ 31.683819] RBP: 00007fc1d99a4000 R08: 0000000000000009 R09: 0000000000001000 [ 31.684693] R10: 0000000000000812 R11: 0000000000000206 R12: 00005634742ceec0 [ 31.685571] R13: 00007ffedab38c20 R14: 00007ffedab38c50 R15: 00007ffedab38fb0 [ 31.686459] [ 31.686749] [ 31.686967] Allocated by task 213: [ 31.687402] kasan_save_stack+0x22/0x50 [ 31.687913] kasan_set_track+0x25/0x30 [ 31.688440] __kasan_slab_alloc+0x59/0x70 [ 31.688988] kmem_cache_alloc+0x16b/0x370 [ 31.689508] vm_area_dup+0x20/0x160 [ 31.689967] __split_vma+0x170/0x950 [ 31.690432] split_vma+0xc6/0x110 [ 31.690869] mprotect_fixup+0x8d2/0xb30 [ 31.691366] do_mprotect_pkey+0x87e/0xd40 [ 31.691902] __x64_sys_mprotect+0x78/0xc0 [ 31.692448] do_syscall_64+0x3f/0x90 [ 31.692928] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.693565] [ 31.693787] Freed by task 203: [ 31.694177] kasan_save_stack+0x22/0x50 [ 31.694681] kasan_set_track+0x25/0x30 [ 31.695174] kasan_save_free_info+0x2b/0x50 [ 31.695701] __kasan_slab_free+0x10a/0x190 [ 31.696252] kmem_cache_free+0x10d/0x4d0 [ 31.696768] rcu_core+0x8c8/0x2860 [ 31.697209] __do_softirq+0x1b7/0x7d4 [ 31.697688] [ 31.697905] Last potentially related work creation: [ 31.698485] kasan_save_stack+0x22/0x50 [ 31.699094] __kasan_record_aux_stack+0x8e/0xa0 [ 31.699667] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.700308] remove_vma+0x139/0x170 [ 31.700776] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.701326] do_vmi_munmap+0x1f1/0x2b0 [ 31.701816] __vm_munmap+0x138/0x3a0 [ 31.702291] __x64_sys_munmap+0x59/0x80 [ 31.702790] do_syscall_64+0x3f/0x90 [ 31.703261] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.703907] [ 31.704126] The buggy address belongs to the object at ffff88800f9fe740 [ 31.704126] which belongs to the cache vm_area_struct of size 168 [ 31.705586] The buggy address is located 88 bytes inside of [ 31.705586] freed 168-byte region [ffff88800f9fe740, ffff88800f9fe7e8) [ 31.706988] [ 31.707205] The buggy address belongs to the physical page: [ 31.707863] page:000000003cbe5d21 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf9fe [ 31.708955] memcg:ffff888015e9c501 [ 31.709378] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.710034] page_type: 0xffffffff() [ 31.710486] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.711409] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015e9c501 [ 31.712323] page dumped because: kasan: bad access detected [ 31.712994] [ 31.713205] Memory state around the buggy address: [ 31.713792] ffff88800f9fe680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.714647] ffff88800f9fe700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.715492] >ffff88800f9fe780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.716345] ^ [ 31.716849] ffff88800f9fe800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.717705] ffff88800f9fe880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.718547] ================================================================== [ 31.719484] Disabling lock debugging due to kernel taint [ 33.699518] BUG: Bad rss-counter state mm:00000000966150bf type:MM_FILEPAGES val:33 [ 33.700874] BUG: Bad rss-counter state mm:00000000966150bf type:MM_ANONPAGES val:22 [ 34.165422] BUG: Bad rss-counter state mm:00000000b0559d7f type:MM_FILEPAGES val:33 [ 34.166448] BUG: Bad rss-counter state mm:00000000b0559d7f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24101' (ECDSA) to the list of known hosts. 2023/06/21 02:15:03 fuzzer started 2023/06/21 02:15:04 dialing manager at localhost:36067 2023/06/21 02:15:04 checking machine... 2023/06/21 02:15:04 checking revisions... [ 34.843375] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:15:04 testing simple program... [ 34.894320] cgroup: Unknown subsys name 'net' [ 34.940252] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:15:03 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800ff80000 RCX=0000000000000000 RDX=ffff888015aa9b40 RSI=ffffffff83695dcd RDI=ffff88800f311640 RBP=ffff88800f311640 RSP=ffff88800fd1f9b8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00030009ff02000a R12=ffff88800fd1fe60 R13=ffff888016aa05c0 R14=ffff88800fd1fa88 R15=00000000000000a4 RIP=ffffffff836826c4 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 00007fa403fec900 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=00007ffeb4f13000 CR3=000000000ed16000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=0000006f730074696d7265705f6d6170 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffed100379db05 RBX=ffffed100379db06 RCX=ffffffff81b263cc RDX=ffffed100379db06 RSI=0000000000000008 RDI=ffff88801bced828 RBP=ffffed100379db05 RSP=ffff888008d7f228 R8 =0000000000000000 R9 =ffffed100379db05 R10=ffff88801bced82f R11=0000000000009293 R12=ffff88801bced828 R13=ffff888008d7f638 R14=dffffc0000000000 R15=00000000000006f0 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 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=00007ffe5b28c498 CR3=0000000005482000 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=ffffffff000000000000000000000000 XMM02=ffffffff000000000000000000000000 XMM03=00000000000000000000000000777074 XMM04=00007f741668ec71000000725f646975 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000726f7475636578652d7a7973 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000