[ 24.108674] BUG: Bad rss-counter state mm:0000000017d0d4bb type:MM_FILEPAGES val:33 [ 24.109884] BUG: Bad rss-counter state mm:0000000017d0d4bb type:MM_ANONPAGES val:22 [ 24.249843] ================================================================== [ 24.250703] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.251592] Read of size 8 at addr ffff8880099ce228 by task sshd/219 [ 24.252327] [ 24.252654] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.253460] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.254371] Call Trace: [ 24.254694] [ 24.254963] dump_stack_lvl+0x91/0xf0 [ 24.255429] print_report+0xcc/0x620 [ 24.255887] ? __virt_addr_valid+0x102/0x340 [ 24.256433] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.257017] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.257595] kasan_report+0xbe/0xf0 [ 24.258049] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.258638] vma_interval_tree_remove+0xc75/0xec0 [ 24.259212] vma_prepare+0xc54/0x11a0 [ 24.259666] __split_vma+0x5af/0x950 [ 24.260133] ? __pfx___split_vma+0x10/0x10 [ 24.260678] ? find_held_lock+0x2c/0x110 [ 24.261209] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.261775] ? lock_is_held_type+0x9f/0x120 [ 24.262311] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.262916] ? mtree_range_walk+0x632/0x900 [ 24.263464] ? mas_walk+0x5c7/0x7c0 [ 24.263940] do_vmi_munmap+0x1f1/0x2b0 [ 24.264442] mmap_region+0x1f9/0x2660 [ 24.264925] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.265452] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.266165] ? __pfx_lock_acquire+0x10/0x10 [ 24.266697] ? __pfx_mmap_region+0x10/0x10 [ 24.267237] ? security_mmap_addr+0x7d/0xa0 [ 24.267772] ? get_unmapped_area+0x1f5/0x3f0 [ 24.268335] do_mmap+0x854/0xf00 [ 24.268778] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.269275] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.269843] ksys_mmap_pgoff+0x3af/0x500 [ 24.270352] do_syscall_64+0x3f/0x90 [ 24.270832] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.271482] RIP: 0033:0x7f3f84bbcd82 [ 24.271939] 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 [ 24.274088] RSP: 002b:00007ffefe4e2b48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.274999] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3f84bbcd82 [ 24.275857] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3f83ff6000 [ 24.276727] RBP: 00007f3f83ff6000 R08: 0000000000000009 R09: 0000000000001000 [ 24.277574] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558699d10ec0 [ 24.278424] R13: 00007ffefe4e2b60 R14: 00007ffefe4e2b90 R15: 00007ffefe4e2ef0 [ 24.279285] [ 24.279573] [ 24.279785] Allocated by task 212: [ 24.280217] kasan_save_stack+0x22/0x50 [ 24.280726] kasan_set_track+0x25/0x30 [ 24.281219] __kasan_slab_alloc+0x59/0x70 [ 24.281746] kmem_cache_alloc+0x16b/0x370 [ 24.282270] vm_area_dup+0x20/0x160 [ 24.282722] __split_vma+0x170/0x950 [ 24.283183] split_vma+0xc6/0x110 [ 24.283622] mprotect_fixup+0x8d2/0xb30 [ 24.284118] do_mprotect_pkey+0x87e/0xd40 [ 24.284655] __x64_sys_mprotect+0x78/0xc0 [ 24.285182] do_syscall_64+0x3f/0x90 [ 24.285658] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.286300] [ 24.286512] Freed by task 13: [ 24.286890] kasan_save_stack+0x22/0x50 [ 24.287395] kasan_set_track+0x25/0x30 [ 24.287885] kasan_save_free_info+0x2b/0x50 [ 24.288421] __kasan_slab_free+0x10a/0x190 [ 24.288964] kmem_cache_free+0x10d/0x4d0 [ 24.289479] rcu_core+0x8c8/0x2860 [ 24.289929] __do_softirq+0x1b7/0x7d4 [ 24.290408] [ 24.290620] Last potentially related work creation: [ 24.291207] kasan_save_stack+0x22/0x50 [ 24.291709] __kasan_record_aux_stack+0x8e/0xa0 [ 24.292287] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.292925] remove_vma+0x139/0x170 [ 24.293383] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.293942] do_vmi_munmap+0x1f1/0x2b0 [ 24.294424] __vm_munmap+0x138/0x3a0 [ 24.294891] __x64_sys_munmap+0x59/0x80 [ 24.295383] do_syscall_64+0x3f/0x90 [ 24.295859] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.296514] [ 24.296725] The buggy address belongs to the object at ffff8880099ce1d0 [ 24.296725] which belongs to the cache vm_area_struct of size 168 [ 24.298206] The buggy address is located 88 bytes inside of [ 24.298206] freed 168-byte region [ffff8880099ce1d0, ffff8880099ce278) [ 24.299625] [ 24.299838] The buggy address belongs to the physical page: [ 24.300525] page:000000003c4826a0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x99ce [ 24.301628] memcg:ffff88800d7acc01 [ 24.302054] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.302754] page_type: 0xffffffff() [ 24.303206] raw: 0100000000000200 ffff8880087a0c80 ffffea00002ced40 dead000000000003 [ 24.304129] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d7acc01 [ 24.305051] page dumped because: kasan: bad access detected [ 24.305717] [ 24.305929] Memory state around the buggy address: [ 24.306514] ffff8880099ce100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.307376] ffff8880099ce180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 24.308264] >ffff8880099ce200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 24.309125] ^ [ 24.309691] ffff8880099ce280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 24.310562] ffff8880099ce300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 24.311429] ================================================================== [ 24.312422] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.711572] BUG: Bad rss-counter state mm:0000000056625c28 type:MM_FILEPAGES val:33 [ 26.713502] BUG: Bad rss-counter state mm:0000000056625c28 type:MM_ANONPAGES val:22 [ 27.197230] BUG: Bad rss-counter state mm:00000000c5456597 type:MM_FILEPAGES val:33 [ 27.198626] BUG: Bad rss-counter state mm:00000000c5456597 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52811' (ECDSA) to the list of known hosts. 2023/06/20 10:56:04 fuzzer started 2023/06/20 10:56:04 dialing manager at localhost:36067 2023/06/20 10:56:04 checking machine... 2023/06/20 10:56:04 checking revisions... [ 27.936570] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:56:04 testing simple program... [ 27.983619] cgroup: Unknown subsys name 'net' [ 28.067056] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:56:03 Registers: info registers vcpu 0 RAX=1ffffffff0a58c3f RBX=0000000000000000 RCX=1ffff11002d867b3 RDX=dffffc0000000000 RSI=0000000000000000 RDI=000000000dc84000 RBP=ffff888016c33780 RSP=ffff888008d9fd18 R8 =ffff888016c33d98 R9 =ffffed1002d867b4 R10=ffff888016c33da7 R11=0000000000000000 R12=ffff888016c34a00 R13=0000000000000000 R14=0000000000000020 R15=0000000000000049 RIP=ffffffff81143e8c 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 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=00007fdabb7be7e0 CR3=000000000dc84000 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=00000000000000000000000000000000 XMM01=b25b83c8bbfa76ba4146879e44d90a89 XMM02=000000000011b200ec2efd57dc4c00df XMM03=00000000001214e8ead98dfaaa50cd0b XMM04=3b9a0f34843c01b400000000000ae988 XMM05=dfcdbad4f1609c370000000000131360 XMM06=6b2585bc0121a07b0000000000130538 XMM07=e042d86d42eb936e00000000001217c0 XMM08=ead98dfaaa50cd0b000000000011b260 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff8880141ef118 RCX=0000000000000001 RDX=1ffff1100283de3c RSI=ffffffff81741318 RDI=ffff8880141ef124 RBP=ffff8880141ef1e0 RSP=ffff8880141ef030 R8 =0000000000000001 R9 =ffff8880141ef090 R10=0000000000038001 R11=000000000001e45f R12=ffff8880141ef118 R13=0000000000000000 R14=ffff88800b85d1c0 R15=0000000000000000 RIP=ffffffff813ad547 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 00007f2c90818900 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=00007f2c907f7020 CR3=000000000cabe000 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