syzkaller login: [ 31.174874] BUG: Bad rss-counter state mm:0000000024afffae type:MM_FILEPAGES val:33 [ 31.176639] BUG: Bad rss-counter state mm:0000000024afffae type:MM_ANONPAGES val:22 [ 31.340159] ================================================================== [ 31.341089] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.342041] Read of size 8 at addr ffff8880169145c8 by task sshd/220 [ 31.342807] [ 31.343133] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.344011] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.345008] Call Trace: [ 31.345343] [ 31.345637] dump_stack_lvl+0x91/0xf0 [ 31.346137] print_report+0xcc/0x620 [ 31.346626] ? __virt_addr_valid+0x102/0x340 [ 31.347200] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.347820] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.348445] kasan_report+0xbe/0xf0 [ 31.348926] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.349562] vma_interval_tree_remove+0xc75/0xec0 [ 31.350170] vma_prepare+0xc54/0x11a0 [ 31.350652] __split_vma+0x5af/0x950 [ 31.351145] ? __pfx___split_vma+0x10/0x10 [ 31.351678] ? find_held_lock+0x2c/0x110 [ 31.352208] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.352777] ? lock_is_held_type+0x9f/0x120 [ 31.353315] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.353930] ? mtree_range_walk+0x632/0x900 [ 31.354485] ? mas_walk+0x5c7/0x7c0 [ 31.354968] do_vmi_munmap+0x1f1/0x2b0 [ 31.355469] mmap_region+0x1f9/0x2660 [ 31.355949] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.356460] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.357179] ? __pfx_lock_acquire+0x10/0x10 [ 31.357723] ? __pfx_mmap_region+0x10/0x10 [ 31.358257] ? security_mmap_addr+0x7d/0xa0 [ 31.358787] ? get_unmapped_area+0x1f5/0x3f0 [ 31.359359] do_mmap+0x854/0xf00 [ 31.359812] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.360307] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.360867] ksys_mmap_pgoff+0x3af/0x500 [ 31.361380] do_syscall_64+0x3f/0x90 [ 31.361860] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.362506] RIP: 0033:0x7f54d8b09d82 [ 31.362975] 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 [ 31.365093] RSP: 002b:00007ffe149bf7d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.365999] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f54d8b09d82 [ 31.366841] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f54d7f43000 [ 31.367695] RBP: 00007f54d7f43000 R08: 0000000000000009 R09: 0000000000001000 [ 31.368543] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b0586ded90 [ 31.369380] R13: 00007ffe149bf7f0 R14: 00007ffe149bf820 R15: 00007ffe149bfb80 [ 31.370235] [ 31.370524] [ 31.370739] Allocated by task 213: [ 31.371193] kasan_save_stack+0x22/0x50 [ 31.371702] kasan_set_track+0x25/0x30 [ 31.372194] __kasan_slab_alloc+0x59/0x70 [ 31.372720] kmem_cache_alloc+0x16b/0x370 [ 31.373245] vm_area_dup+0x20/0x160 [ 31.373699] __split_vma+0x170/0x950 [ 31.374165] split_vma+0xc6/0x110 [ 31.374608] mprotect_fixup+0x8d2/0xb30 [ 31.375118] do_mprotect_pkey+0x87e/0xd40 [ 31.375642] __x64_sys_mprotect+0x78/0xc0 [ 31.376162] do_syscall_64+0x3f/0x90 [ 31.376642] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.377302] [ 31.377517] Freed by task 203: [ 31.377915] kasan_save_stack+0x22/0x50 [ 31.378427] kasan_set_track+0x25/0x30 [ 31.378926] kasan_save_free_info+0x2b/0x50 [ 31.379478] __kasan_slab_free+0x10a/0x190 [ 31.380024] kmem_cache_free+0x10d/0x4d0 [ 31.380538] rcu_core+0x8c8/0x2860 [ 31.380999] __do_softirq+0x1b7/0x7d4 [ 31.381476] [ 31.381699] Last potentially related work creation: [ 31.382302] kasan_save_stack+0x22/0x50 [ 31.382811] __kasan_record_aux_stack+0x8e/0xa0 [ 31.383407] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.384056] remove_vma+0x139/0x170 [ 31.384514] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.385089] do_vmi_munmap+0x1f1/0x2b0 [ 31.385583] __vm_munmap+0x138/0x3a0 [ 31.386060] __x64_sys_munmap+0x59/0x80 [ 31.386563] do_syscall_64+0x3f/0x90 [ 31.387060] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.387710] [ 31.387928] The buggy address belongs to the object at ffff888016914570 [ 31.387928] which belongs to the cache vm_area_struct of size 168 [ 31.389413] The buggy address is located 88 bytes inside of [ 31.389413] freed 168-byte region [ffff888016914570, ffff888016914618) [ 31.390806] [ 31.391040] The buggy address belongs to the physical page: [ 31.391703] page:00000000e410d507 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16914 [ 31.392803] memcg:ffff88800d900501 [ 31.393234] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.393874] page_type: 0xffffffff() [ 31.394321] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.395246] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d900501 [ 31.396160] page dumped because: kasan: bad access detected [ 31.396819] [ 31.397035] Memory state around the buggy address: [ 31.397611] ffff888016914480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.398469] ffff888016914500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.399332] >ffff888016914580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.400175] ^ [ 31.400848] ffff888016914600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.401696] ffff888016914680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.402549] ================================================================== [ 31.403658] Disabling lock debugging due to kernel taint [ 33.315402] BUG: Bad rss-counter state mm:00000000acaaa1a9 type:MM_FILEPAGES val:33 [ 33.316303] BUG: Bad rss-counter state mm:00000000acaaa1a9 type:MM_ANONPAGES val:22 [ 33.784100] BUG: Bad rss-counter state mm:000000009d757f4b type:MM_FILEPAGES val:33 [ 33.785224] BUG: Bad rss-counter state mm:000000009d757f4b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5168' (ECDSA) to the list of known hosts. 2023/06/21 02:22:53 fuzzer started 2023/06/21 02:22:53 dialing manager at localhost:36067 2023/06/21 02:22:53 checking machine... 2023/06/21 02:22:53 checking revisions... [ 34.511228] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:22:53 testing simple program... [ 34.560608] cgroup: Unknown subsys name 'net' [ 34.605308] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:22:53 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800ecda780 RCX=0000000000000000 RDX=ffff88800c793680 RSI=ffff88800ecda780 RDI=ffff88801939dbd8 RBP=ffff88801939dbd8 RSP=ffff888018f1f938 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffff88800ecda780 R13=ffff88800ecda7d0 R14=0000000000000000 R15=1ffff110031e3f33 RIP=ffffffff81850bf4 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 00007ff8636d1900 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=00007ff863c86650 CR3=0000000019f3a000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 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=00007ffd30138a08 CR3=0000000017d84000 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=2032353a32323a3230203132206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032353a32323a3230203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000