syzkaller login: [ 30.738263] BUG: Bad rss-counter state mm:00000000593f52f9 type:MM_FILEPAGES val:33 [ 30.739465] BUG: Bad rss-counter state mm:00000000593f52f9 type:MM_ANONPAGES val:22 [ 30.774679] ================================================================== [ 30.775819] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.776773] Read of size 8 at addr ffff88800dafcdf0 by task sshd/218 [ 30.777555] [ 30.777776] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.778652] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.779678] Call Trace: [ 30.780008] [ 30.780298] dump_stack_lvl+0x91/0xf0 [ 30.780801] print_report+0xcc/0x620 [ 30.781287] ? __virt_addr_valid+0x102/0x340 [ 30.781854] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.782483] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.783104] kasan_report+0xbe/0xf0 [ 30.783610] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.784241] vma_interval_tree_remove+0xc75/0xec0 [ 30.784862] vma_prepare+0xc54/0x11a0 [ 30.785353] __split_vma+0x5af/0x950 [ 30.785823] ? __pfx___split_vma+0x10/0x10 [ 30.786358] ? find_held_lock+0x2c/0x110 [ 30.786874] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.787449] ? lock_is_held_type+0x9f/0x120 [ 30.788007] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.788619] ? mtree_range_walk+0x632/0x900 [ 30.789172] ? mas_walk+0x5c7/0x7c0 [ 30.789646] do_vmi_munmap+0x1f1/0x2b0 [ 30.790143] mmap_region+0x1f9/0x2660 [ 30.790629] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.791164] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.791891] ? __pfx_lock_acquire+0x10/0x10 [ 30.792449] ? __pfx_mmap_region+0x10/0x10 [ 30.792986] ? security_mmap_addr+0x7d/0xa0 [ 30.793517] ? get_unmapped_area+0x1f5/0x3f0 [ 30.794074] do_mmap+0x854/0xf00 [ 30.794515] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.795025] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.795617] ksys_mmap_pgoff+0x3af/0x500 [ 30.796136] do_syscall_64+0x3f/0x90 [ 30.796622] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.797291] RIP: 0033:0x7f4c123c3d82 [ 30.797753] 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 [ 30.799944] RSP: 002b:00007ffc2d29f2f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.800878] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4c123c3d82 [ 30.801735] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4c117fd000 [ 30.802575] RBP: 00007f4c117fd000 R08: 0000000000000009 R09: 0000000000001000 [ 30.803665] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d44fd74ec0 [ 30.804522] R13: 00007ffc2d29f310 R14: 00007ffc2d29f340 R15: 00007ffc2d29f6a0 [ 30.805392] [ 30.805694] [ 30.805913] Allocated by task 211: [ 30.806348] kasan_save_stack+0x22/0x50 [ 30.806859] kasan_set_track+0x25/0x30 [ 30.807373] __kasan_slab_alloc+0x59/0x70 [ 30.807896] kmem_cache_alloc+0x16b/0x370 [ 30.808414] vm_area_dup+0x20/0x160 [ 30.808870] __split_vma+0x170/0x950 [ 30.809338] split_vma+0xc6/0x110 [ 30.809780] mprotect_fixup+0x8d2/0xb30 [ 30.810283] do_mprotect_pkey+0x87e/0xd40 [ 30.810801] __x64_sys_mprotect+0x78/0xc0 [ 30.811348] do_syscall_64+0x3f/0x90 [ 30.811829] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.812470] [ 30.812688] Freed by task 211: [ 30.813082] kasan_save_stack+0x22/0x50 [ 30.813587] kasan_set_track+0x25/0x30 [ 30.814086] kasan_save_free_info+0x2b/0x50 [ 30.814624] __kasan_slab_free+0x10a/0x190 [ 30.815169] kmem_cache_free+0x10d/0x4d0 [ 30.815683] rcu_core+0x8c8/0x2860 [ 30.816127] __do_softirq+0x1b7/0x7d4 [ 30.816606] [ 30.816823] Last potentially related work creation: [ 30.817410] kasan_save_stack+0x22/0x50 [ 30.817913] __kasan_record_aux_stack+0x8e/0xa0 [ 30.818490] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.819157] remove_vma+0x139/0x170 [ 30.819623] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.820192] do_vmi_munmap+0x1f1/0x2b0 [ 30.820676] __vm_munmap+0x138/0x3a0 [ 30.821148] __x64_sys_munmap+0x59/0x80 [ 30.821655] do_syscall_64+0x3f/0x90 [ 30.822138] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.822787] [ 30.823001] Second to last potentially related work creation: [ 30.823705] kasan_save_stack+0x22/0x50 [ 30.824210] __kasan_record_aux_stack+0x8e/0xa0 [ 30.824784] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.825440] remove_vma+0x139/0x170 [ 30.825896] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.826461] do_vmi_munmap+0x1f1/0x2b0 [ 30.826950] __vm_munmap+0x138/0x3a0 [ 30.827425] __x64_sys_munmap+0x59/0x80 [ 30.827923] do_syscall_64+0x3f/0x90 [ 30.828410] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.829057] [ 30.829274] The buggy address belongs to the object at ffff88800dafcd98 [ 30.829274] which belongs to the cache vm_area_struct of size 168 [ 30.830746] The buggy address is located 88 bytes inside of [ 30.830746] freed 168-byte region [ffff88800dafcd98, ffff88800dafce40) [ 30.832176] [ 30.832395] The buggy address belongs to the physical page: [ 30.833049] page:00000000895d17f4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdafc [ 30.834139] memcg:ffff88800e57f601 [ 30.834564] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.835276] page_type: 0xffffffff() [ 30.835753] raw: 0100000000000200 ffff8880087a0c80 ffffea00003bdf40 dead000000000005 [ 30.836679] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e57f601 [ 30.837606] page dumped because: kasan: bad access detected [ 30.838271] [ 30.838492] Memory state around the buggy address: [ 30.839094] ffff88800dafcc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.839995] ffff88800dafcd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.840861] >ffff88800dafcd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.841713] ^ [ 30.842563] ffff88800dafce00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.843447] ffff88800dafce80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.844309] ================================================================== [ 30.845365] Disabling lock debugging due to kernel taint [ 32.749366] BUG: Bad rss-counter state mm:0000000014fe1837 type:MM_FILEPAGES val:33 [ 32.750354] BUG: Bad rss-counter state mm:0000000014fe1837 type:MM_ANONPAGES val:22 [ 33.209164] BUG: Bad rss-counter state mm:0000000013436e0e type:MM_FILEPAGES val:33 [ 33.210151] BUG: Bad rss-counter state mm:0000000013436e0e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55670' (ECDSA) to the list of known hosts. 2023/06/20 21:21:25 fuzzer started 2023/06/20 21:21:25 dialing manager at localhost:36067 2023/06/20 21:21:25 checking machine... 2023/06/20 21:21:25 checking revisions... [ 33.954311] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:21:25 testing simple program... [ 34.003461] cgroup: Unknown subsys name 'net' [ 34.066971] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:21:25 Registers: info registers vcpu 0 RAX=0000000080010001 RBX=ffff88800aab0000 RCX=0000000000000000 RDX=000000000001c060 RSI=ffffffff8219168b RDI=0000000000000007 RBP=ffff88800aab0000 RSP=ffff88806ce09dd8 R8 =0000000000000007 R9 =0000000000010000 R10=000000000001c060 R11=ffff88806ce09ff8 R12=000000000001c060 R13=ffff88800aab44c8 R14=ffff88800aab0234 R15=0000000000000001 RIP=ffffffff8219168f RFL=00000046 [---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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007feba1be9900 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=0000558b5ecf5008 CR3=000000000f388000 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=0000000000000050 RBX=ffff88800aab0000 RCX=0000000000000000 RDX=00000000000103f6 RSI=ffffffff8219168b RDI=0000000000000007 RBP=00000000000103f6 RSP=ffff88800a1df7d0 R8 =0000000000000007 R9 =0000000000010000 R10=00000000000103f6 R11=0000000000000128 R12=00000000000103f6 R13=ffffed1001556001 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8219168f RFL=00000093 [--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 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=00007ffc0d32eba8 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=00007fd02c990510000055b2e78ae790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000