[ 30.866070] BUG: Bad rss-counter state mm:00000000b9fad70d type:MM_FILEPAGES val:33 [ 30.867449] BUG: Bad rss-counter state mm:00000000b9fad70d type:MM_ANONPAGES val:22 [ 31.025744] ================================================================== [ 31.026783] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.027716] Read of size 8 at addr ffff88800df1ced8 by task sshd/219 [ 31.028574] [ 31.028812] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.029684] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.030683] Call Trace: [ 31.031023] [ 31.031309] dump_stack_lvl+0x91/0xf0 [ 31.031811] print_report+0xcc/0x620 [ 31.032300] ? __virt_addr_valid+0x102/0x340 [ 31.032857] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.033489] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.034141] kasan_report+0xbe/0xf0 [ 31.034629] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.035261] vma_interval_tree_remove+0xc75/0xec0 [ 31.035893] vma_prepare+0xc54/0x11a0 [ 31.036384] __split_vma+0x5af/0x950 [ 31.036879] ? __pfx___split_vma+0x10/0x10 [ 31.037428] ? find_held_lock+0x2c/0x110 [ 31.037992] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.038581] ? lock_is_held_type+0x9f/0x120 [ 31.039142] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.039781] ? mtree_range_walk+0x632/0x900 [ 31.040359] ? mas_walk+0x5c7/0x7c0 [ 31.040856] do_vmi_munmap+0x1f1/0x2b0 [ 31.041370] mmap_region+0x1f9/0x2660 [ 31.041881] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.042423] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.043167] ? __pfx_lock_acquire+0x10/0x10 [ 31.043722] ? __pfx_mmap_region+0x10/0x10 [ 31.044274] ? security_mmap_addr+0x7d/0xa0 [ 31.044829] ? get_unmapped_area+0x1f5/0x3f0 [ 31.045400] do_mmap+0x854/0xf00 [ 31.045876] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.046394] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.046981] ksys_mmap_pgoff+0x3af/0x500 [ 31.047513] do_syscall_64+0x3f/0x90 [ 31.048017] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.048691] RIP: 0033:0x7fc7240a7d82 [ 31.049164] 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 [ 31.051403] RSP: 002b:00007ffcae8f9358 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.052341] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc7240a7d82 [ 31.053231] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc7234e1000 [ 31.054126] RBP: 00007fc7234e1000 R08: 0000000000000009 R09: 0000000000001000 [ 31.055006] R10: 0000000000000812 R11: 0000000000000206 R12: 00005627c0786ec0 [ 31.055895] R13: 00007ffcae8f9370 R14: 00007ffcae8f93a0 R15: 00007ffcae8f9700 [ 31.056794] [ 31.057101] [ 31.057326] Allocated by task 211: [ 31.057775] kasan_save_stack+0x22/0x50 [ 31.058320] kasan_set_track+0x25/0x30 [ 31.058836] __kasan_slab_alloc+0x59/0x70 [ 31.059383] kmem_cache_alloc+0x16b/0x370 [ 31.059930] vm_area_dup+0x20/0x160 [ 31.060401] __split_vma+0x170/0x950 [ 31.060887] split_vma+0xc6/0x110 [ 31.061348] mprotect_fixup+0x8d2/0xb30 [ 31.061881] do_mprotect_pkey+0x87e/0xd40 [ 31.062426] __x64_sys_mprotect+0x78/0xc0 [ 31.062963] do_syscall_64+0x3f/0x90 [ 31.063459] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.064129] [ 31.064353] Freed by task 211: [ 31.064760] kasan_save_stack+0x22/0x50 [ 31.065291] kasan_set_track+0x25/0x30 [ 31.065829] kasan_save_free_info+0x2b/0x50 [ 31.066390] __kasan_slab_free+0x10a/0x190 [ 31.066947] kmem_cache_free+0x10d/0x4d0 [ 31.067484] rcu_core+0x8c8/0x2860 [ 31.067945] __do_softirq+0x1b7/0x7d4 [ 31.068441] [ 31.068668] Last potentially related work creation: [ 31.069280] kasan_save_stack+0x22/0x50 [ 31.069810] __kasan_record_aux_stack+0x8e/0xa0 [ 31.070411] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.071139] remove_vma+0x139/0x170 [ 31.071646] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.072226] do_vmi_munmap+0x1f1/0x2b0 [ 31.072735] __vm_munmap+0x138/0x3a0 [ 31.073221] __x64_sys_munmap+0x59/0x80 [ 31.073743] do_syscall_64+0x3f/0x90 [ 31.074258] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.074930] [ 31.075155] Second to last potentially related work creation: [ 31.075869] kasan_save_stack+0x22/0x50 [ 31.076387] __kasan_record_aux_stack+0x8e/0xa0 [ 31.076990] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.077658] remove_vma+0x139/0x170 [ 31.078145] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.078732] do_vmi_munmap+0x1f1/0x2b0 [ 31.079238] mmap_region+0x1f9/0x2660 [ 31.079737] do_mmap+0x854/0xf00 [ 31.080186] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.080693] ksys_mmap_pgoff+0x3af/0x500 [ 31.081218] do_syscall_64+0x3f/0x90 [ 31.081718] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.082394] [ 31.082619] The buggy address belongs to the object at ffff88800df1ce80 [ 31.082619] which belongs to the cache vm_area_struct of size 168 [ 31.084175] The buggy address is located 88 bytes inside of [ 31.084175] freed 168-byte region [ffff88800df1ce80, ffff88800df1cf28) [ 31.085651] [ 31.085885] The buggy address belongs to the physical page: [ 31.086579] page:00000000b9707c1f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf1c [ 31.087720] memcg:ffff88800e21bf01 [ 31.088161] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.088837] page_type: 0xffffffff() [ 31.089307] raw: 0100000000000200 ffff8880087a0c80 ffffea0000348980 dead00000000000e [ 31.090280] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e21bf01 [ 31.091224] page dumped because: kasan: bad access detected [ 31.091914] [ 31.092134] Memory state around the buggy address: [ 31.092740] ffff88800df1cd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.093637] ffff88800df1ce00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.094543] >ffff88800df1ce80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.095428] ^ [ 31.096195] ffff88800df1cf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.097087] ffff88800df1cf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.097991] ================================================================== [ 31.098999] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.323569] sshd (219) used greatest stack depth: 24120 bytes left [ 33.324442] BUG: Bad rss-counter state mm:0000000088b410db type:MM_FILEPAGES val:33 [ 33.325512] BUG: Bad rss-counter state mm:0000000088b410db type:MM_ANONPAGES val:22 [ 33.802698] BUG: Bad rss-counter state mm:00000000047e2c47 type:MM_FILEPAGES val:33 [ 33.803892] BUG: Bad rss-counter state mm:00000000047e2c47 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46616' (ECDSA) to the list of known hosts. 2023/06/21 04:38:42 fuzzer started 2023/06/21 04:38:42 dialing manager at localhost:36067 2023/06/21 04:38:42 checking machine... 2023/06/21 04:38:42 checking revisions... [ 34.522727] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:38:42 testing simple program... [ 34.568769] cgroup: Unknown subsys name 'net' [ 34.623350] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:38:42 Registers: info registers vcpu 0 RAX=00007fc55b652a20 RBX=0000558e75357428 RCX=0000558e75355010 RDX=00007fc55b25c720 RSI=0000000000000000 RDI=0000558e75357428 RBP=0000558e75357428 RSP=00007fffc39b8c20 R8 =0000558e7536eb30 R9 =ffffffffffffff01 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=00000000fffffffa R14=0000558e7535c450 R15=00000000fffffffe RIP=00007fc55b4e778f RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fc55aa07900 00000000 00000000 GS =0000 0000000000000000 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=00007fc559f26000 CR3=00000000098f6000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=4b80d31575369d4a00000000000ae988 XMM05=90fc0ee348861dca0000000000133d88 XMM06=806171799158d9670000000000132808 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffff88806cf09b38 RDX=1ffff1100d9e135e RSI=ffffffff813ad720 RDI=ffff88806cf09a98 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888016f41b40 R15=ffff88806cf09a98 RIP=ffffffff8113062c 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 00007fefed44a900 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=00007fefed429020 CR3=00000000162ea000 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=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