[ 24.176234] BUG: Bad rss-counter state mm:0000000086bb4f07 type:MM_FILEPAGES val:33 [ 24.177424] BUG: Bad rss-counter state mm:0000000086bb4f07 type:MM_ANONPAGES val:22 [ 24.313884] ================================================================== [ 24.314981] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.316090] Read of size 8 at addr ffff88800e81eb38 by task sshd/219 [ 24.317149] [ 24.317408] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.318278] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.319293] Call Trace: [ 24.319609] [ 24.319905] dump_stack_lvl+0x91/0xf0 [ 24.320402] print_report+0xcc/0x620 [ 24.320885] ? __virt_addr_valid+0x102/0x340 [ 24.321435] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.322047] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.322671] kasan_report+0xbe/0xf0 [ 24.323163] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.323819] vma_interval_tree_remove+0xc75/0xec0 [ 24.324420] vma_prepare+0xc54/0x11a0 [ 24.324897] __split_vma+0x5af/0x950 [ 24.325367] ? __pfx___split_vma+0x10/0x10 [ 24.325899] ? find_held_lock+0x2c/0x110 [ 24.326417] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.327003] ? lock_is_held_type+0x9f/0x120 [ 24.327530] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.328138] ? mtree_range_walk+0x632/0x900 [ 24.328685] ? mas_walk+0x5c7/0x7c0 [ 24.329159] do_vmi_munmap+0x1f1/0x2b0 [ 24.329658] mmap_region+0x1f9/0x2660 [ 24.330141] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.330648] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.331368] ? __pfx_lock_acquire+0x10/0x10 [ 24.331902] ? __pfx_mmap_region+0x10/0x10 [ 24.332434] ? security_mmap_addr+0x7d/0xa0 [ 24.332984] ? get_unmapped_area+0x1f5/0x3f0 [ 24.333531] do_mmap+0x854/0xf00 [ 24.333967] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.334463] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.335028] ksys_mmap_pgoff+0x3af/0x500 [ 24.335535] do_syscall_64+0x3f/0x90 [ 24.336023] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.336676] RIP: 0033:0x7f3947283d82 [ 24.337136] 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 [ 24.339281] RSP: 002b:00007ffcca0119b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.340170] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3947283d82 [ 24.341011] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f39466bd000 [ 24.341848] RBP: 00007f39466bd000 R08: 0000000000000009 R09: 0000000000001000 [ 24.342688] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561c8a8edf70 [ 24.343535] R13: 00007ffcca0119d0 R14: 00007ffcca011a00 R15: 00007ffcca011d60 [ 24.344396] [ 24.344688] [ 24.344908] Allocated by task 212: [ 24.345344] kasan_save_stack+0x22/0x50 [ 24.345852] kasan_set_track+0x25/0x30 [ 24.346341] __kasan_slab_alloc+0x59/0x70 [ 24.346995] kmem_cache_alloc+0x16b/0x370 [ 24.347511] vm_area_dup+0x20/0x160 [ 24.347977] __split_vma+0x170/0x950 [ 24.348448] split_vma+0xc6/0x110 [ 24.348892] mprotect_fixup+0x8d2/0xb30 [ 24.349405] do_mprotect_pkey+0x87e/0xd40 [ 24.349935] __x64_sys_mprotect+0x78/0xc0 [ 24.350458] do_syscall_64+0x3f/0x90 [ 24.350946] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.351588] [ 24.351808] Freed by task 210: [ 24.352201] kasan_save_stack+0x22/0x50 [ 24.352702] kasan_set_track+0x25/0x30 [ 24.353197] kasan_save_free_info+0x2b/0x50 [ 24.353741] __kasan_slab_free+0x10a/0x190 [ 24.354273] kmem_cache_free+0x10d/0x4d0 [ 24.354775] rcu_core+0x8c8/0x2860 [ 24.355230] __do_softirq+0x1b7/0x7d4 [ 24.355713] [ 24.355930] Last potentially related work creation: [ 24.356508] kasan_save_stack+0x22/0x50 [ 24.357010] __kasan_record_aux_stack+0x8e/0xa0 [ 24.357645] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.358295] remove_vma+0x139/0x170 [ 24.358748] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.359317] do_vmi_munmap+0x1f1/0x2b0 [ 24.359813] __vm_munmap+0x138/0x3a0 [ 24.360281] __x64_sys_munmap+0x59/0x80 [ 24.360781] do_syscall_64+0x3f/0x90 [ 24.361258] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.361903] [ 24.362115] The buggy address belongs to the object at ffff88800e81eae0 [ 24.362115] which belongs to the cache vm_area_struct of size 168 [ 24.363593] The buggy address is located 88 bytes inside of [ 24.363593] freed 168-byte region [ffff88800e81eae0, ffff88800e81eb88) [ 24.364993] [ 24.365211] The buggy address belongs to the physical page: [ 24.365871] page:0000000090abd83d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe81e [ 24.366966] memcg:ffff88800eb38101 [ 24.367396] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.368042] page_type: 0xffffffff() [ 24.368495] raw: 0100000000000200 ffff8880087a0c80 ffffea0000360d00 dead000000000002 [ 24.369413] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb38101 [ 24.370314] page dumped because: kasan: bad access detected [ 24.370984] [ 24.371206] Memory state around the buggy address: [ 24.371783] ffff88800e81ea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.372639] ffff88800e81ea80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 24.373485] >ffff88800e81eb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.374335] ^ [ 24.374949] ffff88800e81eb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 24.375795] ffff88800e81ec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 24.376651] ================================================================== [ 24.377597] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.749095] BUG: Bad rss-counter state mm:00000000164c1c6d type:MM_FILEPAGES val:33 [ 26.750343] BUG: Bad rss-counter state mm:00000000164c1c6d type:MM_ANONPAGES val:22 [ 27.113105] BUG: Bad rss-counter state mm:0000000058c593fd type:MM_FILEPAGES val:33 [ 27.114603] BUG: Bad rss-counter state mm:0000000058c593fd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12744' (ECDSA) to the list of known hosts. 2023/06/20 23:52:51 fuzzer started 2023/06/20 23:52:52 dialing manager at localhost:36067 2023/06/20 23:52:52 checking machine... 2023/06/20 23:52:52 checking revisions... [ 27.862214] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:52:52 testing simple program... [ 27.908644] cgroup: Unknown subsys name 'net' [ 27.961269] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:52:51 Registers: info registers vcpu 0 RAX=ffffffff864b2031 RBX=0000000000000001 RCX=ffffffff864b202c RDX=dffffc0000000000 RSI=0000000000000000 RDI=1ffffffff0c96406 RBP=ffff88800c5978e0 RSP=ffff88800c597818 R8 =ffffffff864b2030 R9 =ffff88800c5978c8 R10=0000000000038001 R11=00000000000b5080 R12=ffff88800c5978e8 R13=ffff88800c5978d0 R14=ffff88800c5978c9 R15=ffff88800c597888 RIP=ffffffff81130aa4 RFL=00000216 [----AP-] 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 00007f933be5b900 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=00007ffd73a52000 CR3=000000001bc8a000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=ffff888008c04400 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=00007fe7672f2100 CR3=000000000c484000 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=0a40cbf69f7485860a4a9632cb7ef035 XMM02=ec2efd57dc4c00df000000000011c550 XMM03=bc4869278c55d9c5000000000011c620 XMM04=5b26fd6b94e0cdb600000000000ae988 XMM05=dfcdbad4f1609c37000000000012fe80 XMM06=dafafd5d42dd5edf000000000012f058 XMM07=e042d86d42eb936e0000000000120a80 XMM08=bc4869278c55d9c5000000000011c620 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000