[ 23.829015] BUG: Bad rss-counter state mm:00000000422c500e type:MM_FILEPAGES val:33 [ 23.830045] BUG: Bad rss-counter state mm:00000000422c500e type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 23.868502] ================================================================== [ 23.869380] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.870542] Read of size 8 at addr ffff88800bae85c8 by task sshd/218 [ 23.871467] [ 23.871687] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.872631] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.873831] Call Trace: [ 23.874227] [ 23.874512] dump_stack_lvl+0x91/0xf0 [ 23.875001] print_report+0xcc/0x620 [ 23.875479] ? __virt_addr_valid+0x102/0x340 [ 23.876044] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.876652] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.877266] kasan_report+0xbe/0xf0 [ 23.877738] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.878357] vma_interval_tree_remove+0xc75/0xec0 [ 23.878961] vma_prepare+0xc54/0x11a0 [ 23.879437] __split_vma+0x5af/0x950 [ 23.879930] ? __pfx___split_vma+0x10/0x10 [ 23.880461] ? find_held_lock+0x2c/0x110 [ 23.880978] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.881545] ? lock_is_held_type+0x9f/0x120 [ 23.882081] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.882686] ? mtree_range_walk+0x632/0x900 [ 23.883241] ? mas_walk+0x5c7/0x7c0 [ 23.883737] do_vmi_munmap+0x1f1/0x2b0 [ 23.884241] mmap_region+0x1f9/0x2660 [ 23.884735] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.885259] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.885985] ? __pfx_lock_acquire+0x10/0x10 [ 23.886515] ? __pfx_mmap_region+0x10/0x10 [ 23.887044] ? security_mmap_addr+0x7d/0xa0 [ 23.887568] ? get_unmapped_area+0x1f5/0x3f0 [ 23.888117] do_mmap+0x854/0xf00 [ 23.888556] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.889045] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.889606] ksys_mmap_pgoff+0x3af/0x500 [ 23.890105] do_syscall_64+0x3f/0x90 [ 23.890580] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.891225] RIP: 0033:0x7f30db6f5d82 [ 23.891678] 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 [ 23.893809] RSP: 002b:00007fff1077d208 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.894724] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f30db6f5d82 [ 23.895571] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f30dab2f000 [ 23.896436] RBP: 00007f30dab2f000 R08: 0000000000000009 R09: 0000000000001000 [ 23.897288] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d2996c3f60 [ 23.898129] R13: 00007fff1077d220 R14: 00007fff1077d250 R15: 00007fff1077d5b0 [ 23.898976] [ 23.899264] [ 23.899476] Allocated by task 211: [ 23.899916] kasan_save_stack+0x22/0x50 [ 23.900415] kasan_set_track+0x25/0x30 [ 23.900907] __kasan_slab_alloc+0x59/0x70 [ 23.901428] kmem_cache_alloc+0x16b/0x370 [ 23.901975] vm_area_dup+0x20/0x160 [ 23.902423] __split_vma+0x170/0x950 [ 23.902888] split_vma+0xc6/0x110 [ 23.903329] mprotect_fixup+0x8d2/0xb30 [ 23.903845] do_mprotect_pkey+0x87e/0xd40 [ 23.904357] __x64_sys_mprotect+0x78/0xc0 [ 23.904870] do_syscall_64+0x3f/0x90 [ 23.905342] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.905978] [ 23.906193] Freed by task 211: [ 23.906583] kasan_save_stack+0x22/0x50 [ 23.907094] kasan_set_track+0x25/0x30 [ 23.907581] kasan_save_free_info+0x2b/0x50 [ 23.908113] __kasan_slab_free+0x10a/0x190 [ 23.908642] kmem_cache_free+0x10d/0x4d0 [ 23.909144] rcu_core+0x8c8/0x2860 [ 23.909582] __do_softirq+0x1b7/0x7d4 [ 23.910060] [ 23.910273] Last potentially related work creation: [ 23.910853] kasan_save_stack+0x22/0x50 [ 23.911349] __kasan_record_aux_stack+0x8e/0xa0 [ 23.911948] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.912586] remove_vma+0x139/0x170 [ 23.913101] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.913652] do_vmi_munmap+0x1f1/0x2b0 [ 23.914136] __vm_munmap+0x138/0x3a0 [ 23.914596] __x64_sys_munmap+0x59/0x80 [ 23.915085] do_syscall_64+0x3f/0x90 [ 23.915558] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.916204] [ 23.916425] Second to last potentially related work creation: [ 23.917101] kasan_save_stack+0x22/0x50 [ 23.917598] __kasan_record_aux_stack+0x8e/0xa0 [ 23.918173] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.918809] remove_vma+0x139/0x170 [ 23.919255] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.919819] do_vmi_munmap+0x1f1/0x2b0 [ 23.920304] __vm_munmap+0x138/0x3a0 [ 23.920773] elf_map+0x26f/0x310 [ 23.921221] load_elf_binary+0xd82/0x5030 [ 23.921742] bprm_execve+0x803/0x1940 [ 23.922211] do_execveat_common+0x734/0x8e0 [ 23.922737] __x64_sys_execve+0x93/0xc0 [ 23.923230] do_syscall_64+0x3f/0x90 [ 23.923718] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.924355] [ 23.924572] The buggy address belongs to the object at ffff88800bae8570 [ 23.924572] which belongs to the cache vm_area_struct of size 168 [ 23.926036] The buggy address is located 88 bytes inside of [ 23.926036] freed 168-byte region [ffff88800bae8570, ffff88800bae8618) [ 23.927444] [ 23.927663] The buggy address belongs to the physical page: [ 23.928323] page:0000000054402047 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xbae8 [ 23.929387] memcg:ffff88800cc2a201 [ 23.929807] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.930465] page_type: 0xffffffff() [ 23.930933] raw: 0100000000000200 ffff8880087a0c80 ffffea000036d480 dead000000000006 [ 23.931858] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cc2a201 [ 23.932756] page dumped because: kasan: bad access detected [ 23.933413] [ 23.933628] Memory state around the buggy address: [ 23.934199] ffff88800bae8480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.935045] ffff88800bae8500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 23.935910] >ffff88800bae8580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.936763] ^ [ 23.937424] ffff88800bae8600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 23.938270] ffff88800bae8680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.939118] ================================================================== [ 23.940064] Disabling lock debugging due to kernel taint [ 25.774322] BUG: Bad rss-counter state mm:000000003ca5e68c type:MM_FILEPAGES val:33 [ 25.775087] BUG: Bad rss-counter state mm:000000003ca5e68c type:MM_ANONPAGES val:22 [ 26.204354] BUG: Bad rss-counter state mm:000000001ccde853 type:MM_FILEPAGES val:33 [ 26.205120] BUG: Bad rss-counter state mm:000000001ccde853 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54574' (ECDSA) to the list of known hosts. 2023/06/20 22:45:42 fuzzer started 2023/06/20 22:45:42 dialing manager at localhost:36067 2023/06/20 22:45:42 checking machine... 2023/06/20 22:45:42 checking revisions... [ 26.917794] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:45:42 testing simple program... [ 26.969139] cgroup: Unknown subsys name 'net' [ 27.028971] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:45:41 Registers: info registers vcpu 0 RAX=ffffffff81132ffe RBX=0000000000000001 RCX=ffff88801bbd7840 RDX=ffff88801bbd77e8 RSI=1ffff1100377aef6 RDI=ffff88801bbd77a0 RBP=ffff88801bbd77f8 RSP=ffff88801bbd76e0 R8 =0000000000000000 R9 =0000000000000000 R10=ffff88801bbd77a0 R11=00000000000b6a61 R12=ffffed100377aef6 R13=ffff88801bbd77e8 R14=ffff88801bbd77e8 R15=ffff88801bbd77a0 RIP=ffffffff81130641 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 00007f7fa9b32900 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=00007f7faa0ea0b0 CR3=0000000018c8c000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007f0b33056000 CR3=000000000d708000 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=7fbc689fdaffd2a133453b89f7f0a43b XMM02=ec2efd57dc4c00df000000000011a2c0 XMM03=1d3e38693102e4c6000000000011a390 XMM04=7d48893ca99fd5e700000000000ae988 XMM05=19e9129bd510f2350000000000132748 XMM06=8903037b12eb0f090000000000131920 XMM07=e042d86d42eb936e0000000000121490 XMM08=1d3e38693102e4c6000000000011a390 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000