[ 32.943394] BUG: Bad rss-counter state mm:000000008c2bbd3e type:MM_FILEPAGES val:33 Debian GNU/Li[ 32.944602] BUG: Bad rss-counter state mm:000000008c2bbd3e type:MM_ANONPAGES val:22 nux 11 syzkaller ttyS0 syzkaller login: [ 33.121838] ================================================================== [ 33.122783] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.123760] Read of size 8 at addr ffff888015e093f8 by task sshd/220 [ 33.124569] [ 33.124800] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.125844] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.126863] Call Trace: [ 33.127200] [ 33.127494] dump_stack_lvl+0x91/0xf0 [ 33.128000] print_report+0xcc/0x620 [ 33.128498] ? __virt_addr_valid+0x102/0x340 [ 33.129067] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.129732] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.130380] kasan_report+0xbe/0xf0 [ 33.130877] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.131536] vma_interval_tree_remove+0xc75/0xec0 [ 33.132172] vma_prepare+0xc54/0x11a0 [ 33.132669] __split_vma+0x5af/0x950 [ 33.133164] ? __pfx___split_vma+0x10/0x10 [ 33.133726] ? find_held_lock+0x2c/0x110 [ 33.134245] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.134822] ? lock_is_held_type+0x9f/0x120 [ 33.135370] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.135988] ? mtree_range_walk+0x632/0x900 [ 33.136554] ? mas_walk+0x5c7/0x7c0 [ 33.137032] do_vmi_munmap+0x1f1/0x2b0 [ 33.137540] mmap_region+0x1f9/0x2660 [ 33.138024] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.138541] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.139263] ? __pfx_lock_acquire+0x10/0x10 [ 33.139811] ? __pfx_mmap_region+0x10/0x10 [ 33.140364] ? security_mmap_addr+0x7d/0xa0 [ 33.140900] ? get_unmapped_area+0x1f5/0x3f0 [ 33.141484] do_mmap+0x854/0xf00 [ 33.141925] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.142432] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.142994] ksys_mmap_pgoff+0x3af/0x500 [ 33.143509] do_syscall_64+0x3f/0x90 [ 33.144009] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.144696] RIP: 0033:0x7fcf32eebd82 [ 33.145181] 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 [ 33.147482] RSP: 002b:00007fffd068b998 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.148440] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcf32eebd82 [ 33.149343] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcf32325000 [ 33.150277] RBP: 00007fcf32325000 R08: 0000000000000009 R09: 0000000000001000 [ 33.151177] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e097d36f70 [ 33.152093] R13: 00007fffd068b9b0 R14: 00007fffd068b9e0 R15: 00007fffd068bd40 [ 33.153000] [ 33.153306] [ 33.153552] Allocated by task 211: [ 33.154003] kasan_save_stack+0x22/0x50 [ 33.154545] kasan_set_track+0x25/0x30 [ 33.155067] __kasan_slab_alloc+0x59/0x70 [ 33.155624] kmem_cache_alloc+0x16b/0x370 [ 33.156171] vm_area_dup+0x20/0x160 [ 33.156643] __split_vma+0x170/0x950 [ 33.157139] split_vma+0xc6/0x110 [ 33.157605] mprotect_fixup+0x8d2/0xb30 [ 33.158138] do_mprotect_pkey+0x87e/0xd40 [ 33.158698] __x64_sys_mprotect+0x78/0xc0 [ 33.159258] do_syscall_64+0x3f/0x90 [ 33.159756] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.160431] [ 33.160660] Freed by task 211: [ 33.161077] kasan_save_stack+0x22/0x50 [ 33.161621] kasan_set_track+0x25/0x30 [ 33.162153] kasan_save_free_info+0x2b/0x50 [ 33.162715] __kasan_slab_free+0x10a/0x190 [ 33.163282] kmem_cache_free+0x10d/0x4d0 [ 33.163825] rcu_core+0x8c8/0x2860 [ 33.164293] __do_softirq+0x1b7/0x7d4 [ 33.164802] [ 33.165024] Last potentially related work creation: [ 33.165667] kasan_save_stack+0x22/0x50 [ 33.166196] __kasan_record_aux_stack+0x8e/0xa0 [ 33.166806] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.167503] remove_vma+0x139/0x170 [ 33.167986] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.168569] do_vmi_munmap+0x1f1/0x2b0 [ 33.169074] __vm_munmap+0x138/0x3a0 [ 33.169577] __x64_sys_munmap+0x59/0x80 [ 33.170100] do_syscall_64+0x3f/0x90 [ 33.170602] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.171279] [ 33.171507] The buggy address belongs to the object at ffff888015e093a0 [ 33.171507] which belongs to the cache vm_area_struct of size 168 [ 33.173073] The buggy address is located 88 bytes inside of [ 33.173073] freed 168-byte region [ffff888015e093a0, ffff888015e09448) [ 33.174581] [ 33.174814] The buggy address belongs to the physical page: [ 33.175516] page:000000007a4af26a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15e09 [ 33.176687] memcg:ffff888019cf9701 [ 33.177140] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.177830] page_type: 0xffffffff() [ 33.178306] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.179287] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019cf9701 [ 33.180247] page dumped because: kasan: bad access detected [ 33.180968] [ 33.181190] Memory state around the buggy address: [ 33.181817] ffff888015e09280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 33.182746] ffff888015e09300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 33.183664] >ffff888015e09380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 33.184574] ^ [ 33.185491] ffff888015e09400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 33.186402] ffff888015e09480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.187306] ================================================================== [ 33.188539] Disabling lock debugging due to kernel taint [ 35.203703] BUG: Bad rss-counter state mm:00000000cc9b8cfe type:MM_FILEPAGES val:33 [ 35.204953] BUG: Bad rss-counter state mm:00000000cc9b8cfe type:MM_ANONPAGES val:22 [ 35.618321] BUG: Bad rss-counter state mm:00000000bfa7a755 type:MM_FILEPAGES val:33 [ 35.619505] BUG: Bad rss-counter state mm:00000000bfa7a755 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63527' (ECDSA) to the list of known hosts. 2023/06/19 16:44:50 fuzzer started 2023/06/19 16:44:50 dialing manager at localhost:44161 2023/06/19 16:44:50 checking machine... 2023/06/19 16:44:50 checking revisions... [ 36.330653] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:44:51 testing simple program... [ 36.387612] cgroup: Unknown subsys name 'net' [ 36.476736] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:44:41 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000001255 RCX=0000000080000000 RDX=0000000000000000 RSI=ffffffff8171aea7 RDI=ffff8880167a83f4 RBP=0000000000000000 RSP=ffff88800bec7e70 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=00007f9b37e0a650 R14=0000000000000200 R15=0000000000000040 RIP=ffffffff814c07f1 RFL=00000293 [--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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f9b37855900 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=00007f9b37e0a650 CR3=00000000164fa000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007ffc2f927648 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=00007ffb0478c5100000555b2eee3790 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