syzkaller login: [ 30.458070] BUG: Bad rss-counter state mm:000000005d4a026c type:MM_FILEPAGES val:33 [ 30.459342] BUG: Bad rss-counter state mm:000000005d4a026c type:MM_ANONPAGES val:22 [ 30.497429] ================================================================== [ 30.498461] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.499455] Read of size 8 at addr ffff888017e5b968 by task sshd/220 [ 30.500265] [ 30.500499] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.501423] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.502493] Call Trace: [ 30.502830] <TASK> [ 30.503127] dump_stack_lvl+0x91/0xf0 [ 30.503649] print_report+0xcc/0x620 [ 30.504155] ? __virt_addr_valid+0x102/0x340 [ 30.504753] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.505427] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.506090] kasan_report+0xbe/0xf0 [ 30.506603] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.507273] vma_interval_tree_remove+0xc75/0xec0 [ 30.507904] vma_prepare+0xc54/0x11a0 [ 30.508433] __split_vma+0x5af/0x950 [ 30.508938] ? __pfx___split_vma+0x10/0x10 [ 30.509515] ? find_held_lock+0x2c/0x110 [ 30.510080] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.510686] ? lock_is_held_type+0x9f/0x120 [ 30.511262] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.511903] ? mtree_range_walk+0x632/0x900 [ 30.512498] ? mas_walk+0x5c7/0x7c0 [ 30.512999] do_vmi_munmap+0x1f1/0x2b0 [ 30.513537] mmap_region+0x1f9/0x2660 [ 30.514073] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.514625] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.515400] ? __pfx_lock_acquire+0x10/0x10 [ 30.515961] ? __pfx_mmap_region+0x10/0x10 [ 30.516541] ? security_mmap_addr+0x7d/0xa0 [ 30.517097] ? get_unmapped_area+0x1f5/0x3f0 [ 30.517691] do_mmap+0x854/0xf00 [ 30.518174] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.518724] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.519330] ksys_mmap_pgoff+0x3af/0x500 [ 30.519863] do_syscall_64+0x3f/0x90 [ 30.520376] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.521058] RIP: 0033:0x7f1e4db58d82 [ 30.521551] 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 [ 30.523849] RSP: 002b:00007fff7aa5f1a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.524941] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1e4db58d82 [ 30.525866] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1e4cf92000 [ 30.526772] RBP: 00007f1e4cf92000 R08: 0000000000000009 R09: 0000000000001000 [ 30.527693] R10: 0000000000000812 R11: 0000000000000206 R12: 00005651c5db3f70 [ 30.528596] R13: 00007fff7aa5f1c0 R14: 00007fff7aa5f1f0 R15: 00007fff7aa5f550 [ 30.529509] </TASK> [ 30.529814] [ 30.530052] Allocated by task 212: [ 30.530511] kasan_save_stack+0x22/0x50 [ 30.531043] kasan_set_track+0x25/0x30 [ 30.531587] __kasan_slab_alloc+0x59/0x70 [ 30.532140] kmem_cache_alloc+0x16b/0x370 [ 30.532709] vm_area_dup+0x20/0x160 [ 30.533196] __split_vma+0x170/0x950 [ 30.533719] split_vma+0xc6/0x110 [ 30.534203] mprotect_fixup+0x8d2/0xb30 [ 30.534743] do_mprotect_pkey+0x87e/0xd40 [ 30.535312] __x64_sys_mprotect+0x78/0xc0 [ 30.535860] do_syscall_64+0x3f/0x90 [ 30.536380] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.537052] [ 30.537289] Freed by task 212: [ 30.537704] kasan_save_stack+0x22/0x50 [ 30.538247] kasan_set_track+0x25/0x30 [ 30.538782] kasan_save_free_info+0x2b/0x50 [ 30.539360] __kasan_slab_free+0x10a/0x190 [ 30.539922] kmem_cache_free+0x10d/0x4d0 [ 30.540483] rcu_core+0x8c8/0x2860 [ 30.540955] __do_softirq+0x1b7/0x7d4 [ 30.541469] [ 30.541694] Last potentially related work creation: [ 30.542352] kasan_save_stack+0x22/0x50 [ 30.542881] __kasan_record_aux_stack+0x8e/0xa0 [ 30.543503] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.544174] remove_vma+0x139/0x170 [ 30.544667] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.545257] do_vmi_munmap+0x1f1/0x2b0 [ 30.545775] __vm_munmap+0x138/0x3a0 [ 30.546298] __x64_sys_munmap+0x59/0x80 [ 30.546817] do_syscall_64+0x3f/0x90 [ 30.547325] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.548005] [ 30.548232] The buggy address belongs to the object at ffff888017e5b910 [ 30.548232] which belongs to the cache vm_area_struct of size 168 [ 30.549795] The buggy address is located 88 bytes inside of [ 30.549795] freed 168-byte region [ffff888017e5b910, ffff888017e5b9b8) [ 30.551329] [ 30.551560] The buggy address belongs to the physical page: [ 30.552255] page:00000000654e3839 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17e5b [ 30.553445] memcg:ffff888019a73001 [ 30.553916] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.554608] page_type: 0xffffffff() [ 30.555082] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.556061] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019a73001 [ 30.557040] page dumped because: kasan: bad access detected [ 30.557746] [ 30.557988] Memory state around the buggy address: [ 30.558617] ffff888017e5b800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.559539] ffff888017e5b880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.560455] >ffff888017e5b900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.561357] ^ [ 30.562199] ffff888017e5b980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.563101] ffff888017e5ba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.564005] ================================================================== [ 30.565311] Disabling lock debugging due to kernel taint [ 32.461644] BUG: Bad rss-counter state mm:00000000dbc78ca6 type:MM_FILEPAGES val:33 [ 32.462967] BUG: Bad rss-counter state mm:00000000dbc78ca6 type:MM_ANONPAGES val:22 [ 32.948313] BUG: Bad rss-counter state mm:000000002ce71e4c type:MM_FILEPAGES val:33 [ 32.949470] BUG: Bad rss-counter state mm:000000002ce71e4c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10471' (ECDSA) to the list of known hosts. 2023/06/20 08:45:36 fuzzer started 2023/06/20 08:45:37 dialing manager at localhost:44161 2023/06/20 08:45:37 checking machine... 2023/06/20 08:45:37 checking revisions... [ 33.642504] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:45:37 testing simple program... [ 33.702450] cgroup: Unknown subsys name 'net' [ 33.740084] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:45:35 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88801991f988 RCX=0000000000000001 RDX=1ffff11003323f3c RSI=ffff88801991fcf0 RDI=ffff88801991f988 RBP=ffff88801991f9e0 RSP=ffff88801991f970 R8 =0000000000000001 R9 =ffff88801991f9c8 R10=0000000000038001 R11=0000000000020de7 R12=ffff88801991fa50 R13=0000000000000000 R14=ffff88800f1e51c0 R15=0000000000000cc0 RIP=ffffffff8113038e 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 00007f755df33900 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=00007f755e4e8650 CR3=0000000009a28000 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=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff86141d62 RDX=ffff8880146ffa08 RSI=1ffff110028dff43 RDI=1ffff110028dff43 RBP=ffff8880146ffa18 RSP=ffff8880146ff950 R8 =ffffffff86141d66 R9 =ffff8880146ffa00 R10=0000000000038001 R11=0000000000022999 R12=ffff8880146ffa20 R13=ffff8880146ffa08 R14=ffff8880146ffe58 R15=ffff8880146ff9c0 RIP=ffffffff811310a7 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 00007f69df47d900 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=00007f69de8ee6b0 CR3=0000000013ad2000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=4326e0674e77fe9b00000000000ae988 XMM05=b5a7b16071a98bbe0000000000135a50 XMM06=4e362a4b61b9ac840000000000134af8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000