[ 24.086042] BUG: Bad rss-counter state mm:0000000022914ba5 type:MM_FILEPAGES val:33 [ 24.088148] BUG: Bad rss-counter state mm:0000000022914ba5 type:MM_ANONPAGES val:22 [ 24.248946] ================================================================== [ 24.250021] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.251153] Read of size 8 at addr ffff8880098835c8 by task sshd/219 [ 24.252249] [ 24.252515] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.253542] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.254735] Call Trace: [ 24.255098] [ 24.255387] dump_stack_lvl+0x91/0xf0 [ 24.255876] print_report+0xcc/0x620 [ 24.256360] ? __virt_addr_valid+0x102/0x340 [ 24.256913] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.257522] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.258141] kasan_report+0xbe/0xf0 [ 24.258613] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.259244] vma_interval_tree_remove+0xc75/0xec0 [ 24.259853] vma_prepare+0xc54/0x11a0 [ 24.260326] __split_vma+0x5af/0x950 [ 24.260795] ? __pfx___split_vma+0x10/0x10 [ 24.261318] ? find_held_lock+0x2c/0x110 [ 24.261835] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.262417] ? lock_is_held_type+0x9f/0x120 [ 24.262972] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.263584] ? mtree_range_walk+0x632/0x900 [ 24.264138] ? mas_walk+0x5c7/0x7c0 [ 24.264613] do_vmi_munmap+0x1f1/0x2b0 [ 24.265113] mmap_region+0x1f9/0x2660 [ 24.265593] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.266102] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.266816] ? __pfx_lock_acquire+0x10/0x10 [ 24.267363] ? __pfx_mmap_region+0x10/0x10 [ 24.267903] ? security_mmap_addr+0x7d/0xa0 [ 24.268435] ? get_unmapped_area+0x1f5/0x3f0 [ 24.268983] do_mmap+0x854/0xf00 [ 24.269420] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.269926] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.270490] ksys_mmap_pgoff+0x3af/0x500 [ 24.271009] do_syscall_64+0x3f/0x90 [ 24.271492] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.272144] RIP: 0033:0x7f1a09efad82 [ 24.272598] 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 [ 24.274750] RSP: 002b:00007ffe96327fb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.275690] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1a09efad82 [ 24.276549] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1a09334000 [ 24.277410] RBP: 00007f1a09334000 R08: 0000000000000009 R09: 0000000000001000 [ 24.278271] R10: 0000000000000812 R11: 0000000000000206 R12: 000056342c15ed90 [ 24.279168] R13: 00007ffe96327fd0 R14: 00007ffe96328000 R15: 00007ffe96328360 [ 24.280024] [ 24.280318] [ 24.280533] Allocated by task 212: [ 24.280967] kasan_save_stack+0x22/0x50 [ 24.281475] kasan_set_track+0x25/0x30 [ 24.281970] __kasan_slab_alloc+0x59/0x70 [ 24.282492] kmem_cache_alloc+0x16b/0x370 [ 24.283033] vm_area_dup+0x20/0x160 [ 24.283486] __split_vma+0x170/0x950 [ 24.283950] split_vma+0xc6/0x110 [ 24.284387] mprotect_fixup+0x8d2/0xb30 [ 24.284892] do_mprotect_pkey+0x87e/0xd40 [ 24.285411] __x64_sys_mprotect+0x78/0xc0 [ 24.285927] do_syscall_64+0x3f/0x90 [ 24.286396] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.287048] [ 24.287264] Freed by task 212: [ 24.287660] kasan_save_stack+0x22/0x50 [ 24.288173] kasan_set_track+0x25/0x30 [ 24.288662] kasan_save_free_info+0x2b/0x50 [ 24.289192] __kasan_slab_free+0x10a/0x190 [ 24.289723] kmem_cache_free+0x10d/0x4d0 [ 24.290230] rcu_core+0x8c8/0x2860 [ 24.290667] __do_softirq+0x1b7/0x7d4 [ 24.291156] [ 24.291374] Last potentially related work creation: [ 24.291954] kasan_save_stack+0x22/0x50 [ 24.292543] __kasan_record_aux_stack+0x8e/0xa0 [ 24.293122] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.293758] remove_vma+0x139/0x170 [ 24.294205] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.294756] do_vmi_munmap+0x1f1/0x2b0 [ 24.295261] __vm_munmap+0x138/0x3a0 [ 24.295724] __x64_sys_munmap+0x59/0x80 [ 24.296222] do_syscall_64+0x3f/0x90 [ 24.296693] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.297345] [ 24.297560] The buggy address belongs to the object at ffff888009883570 [ 24.297560] which belongs to the cache vm_area_struct of size 168 [ 24.299071] The buggy address is located 88 bytes inside of [ 24.299071] freed 168-byte region [ffff888009883570, ffff888009883618) [ 24.300487] [ 24.300703] The buggy address belongs to the physical page: [ 24.301362] page:000000003c2a9cf3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9883 [ 24.302462] memcg:ffff8880097d7501 [ 24.302891] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.303604] page_type: 0xffffffff() [ 24.304071] raw: 0100000000000200 ffff8880087a0c80 ffffea000035a500 dead000000000007 [ 24.304995] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880097d7501 [ 24.305910] page dumped because: kasan: bad access detected [ 24.306579] [ 24.306797] Memory state around the buggy address: [ 24.307388] ffff888009883480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.308242] ffff888009883500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 24.309098] >ffff888009883580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.309945] ^ [ 24.310602] ffff888009883600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 24.311472] ffff888009883680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.312320] ================================================================== [ 24.313245] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.970367] BUG: Bad rss-counter state mm:00000000c2a86260 type:MM_FILEPAGES val:33 [ 25.970912] BUG: Bad rss-counter state mm:00000000c2a86260 type:MM_ANONPAGES val:22 [ 26.379954] BUG: Bad rss-counter state mm:00000000979aa3cf type:MM_FILEPAGES val:33 [ 26.381045] BUG: Bad rss-counter state mm:00000000979aa3cf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37987' (ECDSA) to the list of known hosts. 2023/06/20 18:45:52 fuzzer started 2023/06/20 18:45:52 dialing manager at localhost:36067 2023/06/20 18:45:52 checking machine... 2023/06/20 18:45:52 checking revisions... [ 27.128245] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:45:52 testing simple program... [ 27.174446] cgroup: Unknown subsys name 'net' [ 27.217730] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:45:52 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000009 RCX=ffffffff84088d7b RDX=ffff888018ef1b40 RSI=0000000000000000 RDI=0000000000000005 RBP=ffffffff85c58c00 RSP=ffff88800eb6fb98 R8 =0000000000000005 R9 =0000000000000010 R10=0000000000000009 R11=00000000000b6a61 R12=ffff88800eb6fd28 R13=0000000000000000 R14=ffffffff85a63bc0 R15=0000000000000001 RIP=ffffffff814c0261 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 00007fba68eb4900 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=00007ffc5ad96000 CR3=00000000090e8000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 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=0000000000000001 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=00007f3ace0067e0 CR3=000000000d76c000 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=080e1b7125e53cb032497343cf87ef4d XMM02=000000000011a0c0ec2efd57dc4c00df XMM03=0000000000120f101fb07d51d9686e13 XMM04=8b14d946c9ea689a00000000000ae988 XMM05=f6ade54162784c370000000000131c80 XMM06=806171799158d96700000000001309b0 XMM07=e042d86d42eb936e0000000000121190 XMM08=1fb07d51d9686e13000000000011a120 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000