[ 23.681334] BUG: Bad rss-counter state mm:0000000005e1add2 type:MM_FILEPAGES val:33 [ 23.682839] BUG: Bad rss-counter state mm:0000000005e1add2 type:MM_ANONPAGES val:22 [ 23.784553] ================================================================== [ 23.785242] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.785951] Read of size 8 at addr ffff88801a331880 by task sshd/219 [ 23.786537] [ 23.786701] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.787468] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.788211] Call Trace: [ 23.788455] [ 23.788675] dump_stack_lvl+0x91/0xf0 [ 23.789050] print_report+0xcc/0x620 [ 23.789420] ? __virt_addr_valid+0x102/0x340 [ 23.789843] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.790314] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.790783] kasan_report+0xbe/0xf0 [ 23.791144] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.791642] vma_interval_tree_remove+0xc75/0xec0 [ 23.792101] vma_prepare+0xc54/0x11a0 [ 23.792445] __split_vma+0x5af/0x950 [ 23.792708] ? __pfx___split_vma+0x10/0x10 [ 23.793007] ? find_held_lock+0x2c/0x110 [ 23.793305] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.793619] ? lock_is_held_type+0x9f/0x120 [ 23.793929] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.794269] ? mtree_range_walk+0x632/0x900 [ 23.794609] ? mas_walk+0x5c7/0x7c0 [ 23.794898] do_vmi_munmap+0x1f1/0x2b0 [ 23.795200] mmap_region+0x1f9/0x2660 [ 23.795499] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.795807] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.796247] ? __pfx_lock_acquire+0x10/0x10 [ 23.796566] ? __pfx_mmap_region+0x10/0x10 [ 23.796882] ? security_mmap_addr+0x7d/0xa0 [ 23.797205] ? get_unmapped_area+0x1f5/0x3f0 [ 23.797537] do_mmap+0x854/0xf00 [ 23.797796] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.798099] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.798439] ksys_mmap_pgoff+0x3af/0x500 [ 23.798743] do_syscall_64+0x3f/0x90 [ 23.799027] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.799423] RIP: 0033:0x7faaca786d82 [ 23.799699] 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 [ 23.800976] RSP: 002b:00007ffea8d581a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.801533] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faaca786d82 [ 23.802044] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faac9bc0000 [ 23.802559] RBP: 00007faac9bc0000 R08: 0000000000000009 R09: 0000000000001000 [ 23.803079] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564d68519ec0 [ 23.803595] R13: 00007ffea8d581c0 R14: 00007ffea8d581f0 R15: 00007ffea8d58550 [ 23.804117] [ 23.804291] [ 23.804418] Allocated by task 207: [ 23.804676] kasan_save_stack+0x22/0x50 [ 23.804981] kasan_set_track+0x25/0x30 [ 23.805279] __kasan_slab_alloc+0x59/0x70 [ 23.805593] kmem_cache_alloc+0x16b/0x370 [ 23.805908] vm_area_dup+0x20/0x160 [ 23.806179] __split_vma+0x170/0x950 [ 23.806452] split_vma+0xc6/0x110 [ 23.806714] mprotect_fixup+0x8d2/0xb30 [ 23.807017] do_mprotect_pkey+0x87e/0xd40 [ 23.807340] __x64_sys_mprotect+0x78/0xc0 [ 23.807655] do_syscall_64+0x3f/0x90 [ 23.807940] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.808323] [ 23.808448] Freed by task 203: [ 23.808688] kasan_save_stack+0x22/0x50 [ 23.808993] kasan_set_track+0x25/0x30 [ 23.809287] kasan_save_free_info+0x2b/0x50 [ 23.809610] __kasan_slab_free+0x10a/0x190 [ 23.809930] kmem_cache_free+0x10d/0x4d0 [ 23.810232] rcu_core+0x8c8/0x2860 [ 23.810502] __do_softirq+0x1b7/0x7d4 [ 23.810789] [ 23.810917] Last potentially related work creation: [ 23.811273] kasan_save_stack+0x22/0x50 [ 23.811595] __kasan_record_aux_stack+0x8e/0xa0 [ 23.811939] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.812324] remove_vma+0x139/0x170 [ 23.812597] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.812936] do_vmi_munmap+0x1f1/0x2b0 [ 23.813226] __vm_munmap+0x138/0x3a0 [ 23.813500] __x64_sys_munmap+0x59/0x80 [ 23.813804] do_syscall_64+0x3f/0x90 [ 23.814090] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.814475] [ 23.814605] The buggy address belongs to the object at ffff88801a331828 [ 23.814605] which belongs to the cache vm_area_struct of size 168 [ 23.815503] The buggy address is located 88 bytes inside of [ 23.815503] freed 168-byte region [ffff88801a331828, ffff88801a3318d0) [ 23.816355] [ 23.816486] The buggy address belongs to the physical page: [ 23.816887] page:00000000643fc8f0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a331 [ 23.817549] memcg:ffff88801a2ca801 [ 23.817813] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.818207] page_type: 0xffffffff() [ 23.818476] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 23.819026] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a2ca801 [ 23.819577] page dumped because: kasan: bad access detected [ 23.819979] [ 23.820106] Memory state around the buggy address: [ 23.820463] ffff88801a331780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 23.820979] ffff88801a331800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 23.821500] >ffff88801a331880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 23.822014] ^ [ 23.822263] ffff88801a331900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.822784] ffff88801a331980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 23.823300] ================================================================== [ 23.823885] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.749841] BUG: Bad rss-counter state mm:0000000084228b31 type:MM_FILEPAGES val:33 [ 25.750865] BUG: Bad rss-counter state mm:0000000084228b31 type:MM_ANONPAGES val:22 [ 26.108783] BUG: Bad rss-counter state mm:00000000148ee016 type:MM_FILEPAGES val:33 [ 26.109824] BUG: Bad rss-counter state mm:00000000148ee016 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50148' (ECDSA) to the list of known hosts. 2023/06/21 06:32:42 fuzzer started 2023/06/21 06:32:43 dialing manager at localhost:36067 2023/06/21 06:32:43 checking machine... 2023/06/21 06:32:43 checking revisions... [ 26.716360] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:32:43 testing simple program... [ 26.770313] cgroup: Unknown subsys name 'net' [ 26.804394] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:32:42 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff863b3584 RDX=1ffff11002b28f31 RSI=1ffff11002b28f30 RDI=1ffff11002b28f30 RBP=ffff888015947980 RSP=ffff8880159478b8 R8 =ffffffff863b3588 R9 =ffff888015947968 R10=0000000000038001 R11=000000000008a96a R12=ffff888015947988 R13=ffff888015947970 R14=ffff888015947f40 R15=ffff888015947928 RIP=ffffffff811310d4 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 00007f984faf0900 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=00007f98500a80b0 CR3=0000000016bfc000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=00007fe8055b4720 CR3=00000000144a6000 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=0289aab6348ea6bf6742046e7538c686 XMM02=0000000000119e88ec2efd57dc4c00df XMM03=000000000011e0f88015d989de568769 XMM04=95d8bcf374f8f6d200000000000ae988 XMM05=dfcdbad4f1609c3700000000001303c0 XMM06=cad5d2395eef0754000000000012ee30 XMM07=e042d86d42eb936e000000000011f678 XMM08=8015d989de5687690000000000119ee8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000