[ 24.056678] BUG: Bad rss-counter state mm:00000000144be4de type:MM_FILEPAGES val:33 [ 24.057941] BUG: Bad rss-counter state mm:00000000144be4de type:MM_ANONPAGES val:22 [ 24.212621] ================================================================== [ 24.213579] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.214546] Read of size 8 at addr ffff88800ca70c20 by task sshd/220 [ 24.215356] [ 24.215581] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.216632] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.217682] Call Trace: [ 24.218057] [ 24.218355] dump_stack_lvl+0x91/0xf0 [ 24.218876] print_report+0xcc/0x620 [ 24.219392] ? __virt_addr_valid+0x102/0x340 [ 24.220030] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.220713] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.221375] kasan_report+0xbe/0xf0 [ 24.221962] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.222666] vma_interval_tree_remove+0xc75/0xec0 [ 24.223406] vma_prepare+0xc54/0x11a0 [ 24.223930] __split_vma+0x5af/0x950 [ 24.224488] ? __pfx___split_vma+0x10/0x10 [ 24.225091] ? mark_held_locks+0x9e/0xe0 [ 24.225647] ? asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 24.226331] ? asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 24.227030] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.227602] ? lock_is_held_type+0x9f/0x120 [ 24.228186] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.228815] ? mtree_range_walk+0x632/0x900 [ 24.229381] ? mas_walk+0x5c7/0x7c0 [ 24.229873] do_vmi_munmap+0x1f1/0x2b0 [ 24.230398] mmap_region+0x1f9/0x2660 [ 24.230907] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.231433] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.232169] ? __pfx_lock_acquire+0x10/0x10 [ 24.232712] ? __pfx_mmap_region+0x10/0x10 [ 24.233270] ? security_mmap_addr+0x7d/0xa0 [ 24.233808] ? get_unmapped_area+0x1f5/0x3f0 [ 24.234383] do_mmap+0x854/0xf00 [ 24.234833] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.235354] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.235931] ksys_mmap_pgoff+0x3af/0x500 [ 24.236445] do_syscall_64+0x3f/0x90 [ 24.236926] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.237572] RIP: 0033:0x7f2842647d82 [ 24.238034] 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 [ 24.240173] RSP: 002b:00007fffe546b1f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.241079] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2842647d82 [ 24.241926] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2841a81000 [ 24.242767] RBP: 00007f2841a81000 R08: 0000000000000009 R09: 0000000000001000 [ 24.243609] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559517ffcec0 [ 24.244474] R13: 00007fffe546b210 R14: 00007fffe546b240 R15: 00007fffe546b5a0 [ 24.245319] [ 24.245608] [ 24.245823] Allocated by task 213: [ 24.246247] kasan_save_stack+0x22/0x50 [ 24.246752] kasan_set_track+0x25/0x30 [ 24.247242] __kasan_slab_alloc+0x59/0x70 [ 24.247760] kmem_cache_alloc+0x16b/0x370 [ 24.248285] vm_area_dup+0x20/0x160 [ 24.248748] __split_vma+0x170/0x950 [ 24.249215] split_vma+0xc6/0x110 [ 24.249652] mprotect_fixup+0x8d2/0xb30 [ 24.250152] do_mprotect_pkey+0x87e/0xd40 [ 24.250671] __x64_sys_mprotect+0x78/0xc0 [ 24.251188] do_syscall_64+0x3f/0x90 [ 24.251669] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.252317] [ 24.252532] Freed by task 13: [ 24.252913] kasan_save_stack+0x22/0x50 [ 24.253416] kasan_set_track+0x25/0x30 [ 24.253919] kasan_save_free_info+0x2b/0x50 [ 24.254450] __kasan_slab_free+0x10a/0x190 [ 24.254983] kmem_cache_free+0x10d/0x4d0 [ 24.255490] rcu_core+0x8c8/0x2860 [ 24.255957] __do_softirq+0x1b7/0x7d4 [ 24.256434] [ 24.256648] Last potentially related work creation: [ 24.257228] kasan_save_stack+0x22/0x50 [ 24.257728] __kasan_record_aux_stack+0x8e/0xa0 [ 24.258297] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.258934] remove_vma+0x139/0x170 [ 24.259382] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.259952] do_vmi_munmap+0x1f1/0x2b0 [ 24.260435] __vm_munmap+0x138/0x3a0 [ 24.260898] __x64_sys_munmap+0x59/0x80 [ 24.261391] do_syscall_64+0x3f/0x90 [ 24.261861] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.262502] [ 24.262715] Second to last potentially related work creation: [ 24.263396] kasan_save_stack+0x22/0x50 [ 24.263927] __kasan_record_aux_stack+0x8e/0xa0 [ 24.264501] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.265135] remove_vma+0x139/0x170 [ 24.265587] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.266141] do_vmi_munmap+0x1f1/0x2b0 [ 24.266622] mmap_region+0x1f9/0x2660 [ 24.267102] do_mmap+0x854/0xf00 [ 24.267532] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.268025] ksys_mmap_pgoff+0x3af/0x500 [ 24.268524] do_syscall_64+0x3f/0x90 [ 24.268994] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.269636] [ 24.269853] The buggy address belongs to the object at ffff88800ca70bc8 [ 24.269853] which belongs to the cache vm_area_struct of size 168 [ 24.271313] The buggy address is located 88 bytes inside of [ 24.271313] freed 168-byte region [ffff88800ca70bc8, ffff88800ca70c70) [ 24.272711] [ 24.272928] The buggy address belongs to the physical page: [ 24.273577] page:00000000a7cf327a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xca70 [ 24.274647] memcg:ffff88800e78da01 [ 24.275075] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.275726] page_type: 0xffffffff() [ 24.276209] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a4800 dead000000000004 [ 24.277133] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e78da01 [ 24.278036] page dumped because: kasan: bad access detected [ 24.278696] [ 24.278913] Memory state around the buggy address: [ 24.279489] ffff88800ca70b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.280359] ffff88800ca70b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 24.281208] >ffff88800ca70c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 24.282054] ^ [ 24.282577] ffff88800ca70c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 24.283433] ffff88800ca70d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 24.284289] ================================================================== [ 24.285246] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.610699] BUG: Bad rss-counter state mm:000000002f201f65 type:MM_FILEPAGES val:33 [ 26.611902] BUG: Bad rss-counter state mm:000000002f201f65 type:MM_ANONPAGES val:22 [ 27.073680] BUG: Bad rss-counter state mm:000000003e65f251 type:MM_FILEPAGES val:33 [ 27.074850] BUG: Bad rss-counter state mm:000000003e65f251 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37905' (ECDSA) to the list of known hosts. 2023/06/20 18:45:20 fuzzer started 2023/06/20 18:45:20 dialing manager at localhost:36067 2023/06/20 18:45:20 checking machine... 2023/06/20 18:45:20 checking revisions... [ 27.721632] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:45:20 testing simple program... [ 27.765050] cgroup: Unknown subsys name 'net' [ 27.822863] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:45:20 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff1100d9c1353 RSI=ffff888016767db8 RDI=ffff88806ce09aa0 RBP=1ffff11002cecfba RSP=ffff88806ce099e0 R8 =0000000000000001 R9 =ffff88806ce09a90 R10=0000000000038001 R11=000000000002388b R12=ffff88806ce09ab0 R13=ffff88806ce09a98 R14=ffff888016767db8 R15=ffff88806ce09a50 RIP=ffffffff81131c60 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 00007fbca97e0900 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=00007fbca9d95650 CR3=000000000d716000 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=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=00007ffda0ea6ca8 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=00007f66339ec510000055efd2b30790 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