[ 24.021678] BUG: Bad rss-counter state mm:00000000926abd93 type:MM_FILEPAGES val:33 [ 24.021711] BUG: Bad rss-counter state mm:00000000926abd93 type:MM_ANONPAGES val:22 [ 24.245614] ================================================================== [ 24.246541] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.247498] Read of size 8 at addr ffff88801a727968 by task sshd/220 [ 24.248289] [ 24.248528] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.249536] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.250522] Call Trace: [ 24.250846] [ 24.251158] dump_stack_lvl+0x91/0xf0 [ 24.251664] print_report+0xcc/0x620 [ 24.252155] ? __virt_addr_valid+0x102/0x340 [ 24.252741] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.253358] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.253984] kasan_report+0xbe/0xf0 [ 24.254468] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.255093] vma_interval_tree_remove+0xc75/0xec0 [ 24.255706] vma_prepare+0xc54/0x11a0 [ 24.256190] __split_vma+0x5af/0x950 [ 24.256670] ? __pfx___split_vma+0x10/0x10 [ 24.257204] ? find_held_lock+0x2c/0x110 [ 24.257732] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.258301] ? lock_is_held_type+0x9f/0x120 [ 24.258840] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.259452] ? mtree_range_walk+0x632/0x900 [ 24.260006] ? mas_walk+0x5c7/0x7c0 [ 24.260509] do_vmi_munmap+0x1f1/0x2b0 [ 24.261003] mmap_region+0x1f9/0x2660 [ 24.261495] ? mark_held_locks+0x9e/0xe0 [ 24.262001] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.262716] ? lockdep_hardirqs_on_prepare+0x27b/0x3f0 [ 24.263369] ? asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 24.264041] ? __pfx_mmap_region+0x10/0x10 [ 24.264605] ? asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 24.265271] ? security_mmap_addr+0x7d/0xa0 [ 24.265804] ? get_unmapped_area+0x1f5/0x3f0 [ 24.266354] do_mmap+0x854/0xf00 [ 24.266800] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.267302] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.267868] ksys_mmap_pgoff+0x3af/0x500 [ 24.268383] do_syscall_64+0x3f/0x90 [ 24.268866] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.269517] RIP: 0033:0x7fb24a336d82 [ 24.269988] 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 [ 24.272128] RSP: 002b:00007ffd125024d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.273063] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb24a336d82 [ 24.273911] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb249770000 [ 24.274770] RBP: 00007fb249770000 R08: 0000000000000009 R09: 0000000000001000 [ 24.275626] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555ea87d2ec0 [ 24.276483] R13: 00007ffd125024f0 R14: 00007ffd12502520 R15: 00007ffd12502880 [ 24.277342] [ 24.277636] [ 24.277856] Allocated by task 207: [ 24.278293] kasan_save_stack+0x22/0x50 [ 24.278799] kasan_set_track+0x25/0x30 [ 24.279301] __kasan_slab_alloc+0x59/0x70 [ 24.279835] kmem_cache_alloc+0x16b/0x370 [ 24.280359] vm_area_dup+0x20/0x160 [ 24.280819] __split_vma+0x170/0x950 [ 24.281287] split_vma+0xc6/0x110 [ 24.281738] mprotect_fixup+0x8d2/0xb30 [ 24.282253] do_mprotect_pkey+0x87e/0xd40 [ 24.282775] __x64_sys_mprotect+0x78/0xc0 [ 24.283308] do_syscall_64+0x3f/0x90 [ 24.283787] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.284468] [ 24.284687] Freed by task 206: [ 24.285085] kasan_save_stack+0x22/0x50 [ 24.285596] kasan_set_track+0x25/0x30 [ 24.286092] kasan_save_free_info+0x2b/0x50 [ 24.286640] __kasan_slab_free+0x10a/0x190 [ 24.287175] kmem_cache_free+0x10d/0x4d0 [ 24.287683] rcu_core+0x8c8/0x2860 [ 24.288133] __do_softirq+0x1b7/0x7d4 [ 24.288619] [ 24.288840] Last potentially related work creation: [ 24.289433] kasan_save_stack+0x22/0x50 [ 24.289939] __kasan_record_aux_stack+0x8e/0xa0 [ 24.290525] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.291164] remove_vma+0x139/0x170 [ 24.291615] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.292171] do_vmi_munmap+0x1f1/0x2b0 [ 24.292677] __vm_munmap+0x138/0x3a0 [ 24.293149] __x64_sys_munmap+0x59/0x80 [ 24.293649] do_syscall_64+0x3f/0x90 [ 24.294126] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.294776] [ 24.294994] The buggy address belongs to the object at ffff88801a727910 [ 24.294994] which belongs to the cache vm_area_struct of size 168 [ 24.296493] The buggy address is located 88 bytes inside of [ 24.296493] freed 168-byte region [ffff88801a727910, ffff88801a7279b8) [ 24.297907] [ 24.298127] The buggy address belongs to the physical page: [ 24.298799] page:000000007c2f0945 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a727 [ 24.299901] memcg:ffff88801a71b201 [ 24.300347] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.301003] page_type: 0xffffffff() [ 24.301454] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.302384] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a71b201 [ 24.303297] page dumped because: kasan: bad access detected [ 24.303962] [ 24.304180] Memory state around the buggy address: [ 24.304790] ffff88801a727800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 24.305671] ffff88801a727880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 24.306548] >ffff88801a727900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.307406] ^ [ 24.308205] ffff88801a727980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 24.309074] ffff88801a727a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.309948] ================================================================== [ 24.310959] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.321922] BUG: Bad rss-counter state mm:00000000260a0318 type:MM_FILEPAGES val:33 [ 26.322701] BUG: Bad rss-counter state mm:00000000260a0318 type:MM_ANONPAGES val:22 [ 26.768133] BUG: Bad rss-counter state mm:000000005af187fd type:MM_FILEPAGES val:33 [ 26.768915] BUG: Bad rss-counter state mm:000000005af187fd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6234' (ECDSA) to the list of known hosts. 2023/06/20 18:12:11 fuzzer started 2023/06/20 18:12:12 dialing manager at localhost:36067 2023/06/20 18:12:12 checking machine... 2023/06/20 18:12:12 checking revisions... [ 27.443048] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:12:12 testing simple program... [ 27.492034] cgroup: Unknown subsys name 'net' [ 27.531518] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:12:11 Registers: info registers vcpu 0 RAX=1ffffffff0c9674e RBX=0000000000000001 RCX=ffffffff864b3a72 RDX=dffffc0000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff864b3a76 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b54e7 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffffffff85407ee0 R15=ffff88806ce09a98 RIP=ffffffff81130b73 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 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=00007fedf4f66030 CR3=000000000fc6c000 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=2031313a32313a3831203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031313a32313a3831203032 XMM08=3d656e696c646d632022656369767265 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=00007ffe7114a000 CR3=000000000eadc000 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=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