syzkaller login: [ 31.542088] BUG: Bad rss-counter state mm:0000000008d3ce21 type:MM_FILEPAGES val:33 [ 31.543236] BUG: Bad rss-counter state mm:0000000008d3ce21 type:MM_ANONPAGES val:22 [ 31.720011] ================================================================== [ 31.721300] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.722548] Read of size 8 at addr ffff88800d27e6b0 by task sshd/221 [ 31.723752] [ 31.724025] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.725060] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.726228] Call Trace: [ 31.726620] [ 31.726962] dump_stack_lvl+0x91/0xf0 [ 31.727592] print_report+0xcc/0x620 [ 31.728175] ? __virt_addr_valid+0x102/0x340 [ 31.728843] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.729592] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.730347] kasan_report+0xbe/0xf0 [ 31.730930] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.731714] vma_interval_tree_remove+0xc75/0xec0 [ 31.732457] vma_prepare+0xc54/0x11a0 [ 31.733050] __split_vma+0x5af/0x950 [ 31.733629] ? __pfx___split_vma+0x10/0x10 [ 31.734279] ? find_held_lock+0x2c/0x110 [ 31.734920] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.735625] ? lock_is_held_type+0x9f/0x120 [ 31.736283] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.737026] ? mtree_range_walk+0x632/0x900 [ 31.737702] ? mas_walk+0x5c7/0x7c0 [ 31.738291] do_vmi_munmap+0x1f1/0x2b0 [ 31.738895] mmap_region+0x1f9/0x2660 [ 31.739505] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.740138] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.740921] ? __pfx_lock_acquire+0x10/0x10 [ 31.741500] ? __pfx_mmap_region+0x10/0x10 [ 31.742070] ? security_mmap_addr+0x7d/0xa0 [ 31.742645] ? get_unmapped_area+0x1f5/0x3f0 [ 31.743236] do_mmap+0x854/0xf00 [ 31.743713] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.744246] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.744862] ksys_mmap_pgoff+0x3af/0x500 [ 31.745405] do_syscall_64+0x3f/0x90 [ 31.745928] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.746634] RIP: 0033:0x7efedfd09d82 [ 31.747124] 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 [ 31.749422] RSP: 002b:00007ffe98eefec8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.750408] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efedfd09d82 [ 31.751326] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efedf143000 [ 31.752254] RBP: 00007efedf143000 R08: 0000000000000009 R09: 0000000000001000 [ 31.753169] R10: 0000000000000812 R11: 0000000000000206 R12: 00005609a62c8ec0 [ 31.754096] R13: 00007ffe98eefee0 R14: 00007ffe98eeff10 R15: 00007ffe98ef0270 [ 31.755024] [ 31.755340] [ 31.755581] Allocated by task 214: [ 31.756044] kasan_save_stack+0x22/0x50 [ 31.756580] kasan_set_track+0x25/0x30 [ 31.757113] __kasan_slab_alloc+0x59/0x70 [ 31.757680] kmem_cache_alloc+0x16b/0x370 [ 31.758237] vm_area_dup+0x20/0x160 [ 31.758728] __split_vma+0x170/0x950 [ 31.759238] split_vma+0xc6/0x110 [ 31.759735] mprotect_fixup+0x8d2/0xb30 [ 31.760279] do_mprotect_pkey+0x87e/0xd40 [ 31.760838] __x64_sys_mprotect+0x78/0xc0 [ 31.761398] do_syscall_64+0x3f/0x90 [ 31.761918] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.762613] [ 31.762846] Freed by task 214: [ 31.763264] kasan_save_stack+0x22/0x50 [ 31.763814] kasan_set_track+0x25/0x30 [ 31.764354] kasan_save_free_info+0x2b/0x50 [ 31.764928] __kasan_slab_free+0x10a/0x190 [ 31.765507] kmem_cache_free+0x10d/0x4d0 [ 31.766049] rcu_core+0x8c8/0x2860 [ 31.766532] __do_softirq+0x1b7/0x7d4 [ 31.767050] [ 31.767284] Last potentially related work creation: [ 31.767918] kasan_save_stack+0x22/0x50 [ 31.768465] __kasan_record_aux_stack+0x8e/0xa0 [ 31.769085] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.769774] remove_vma+0x139/0x170 [ 31.770264] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.770873] do_vmi_munmap+0x1f1/0x2b0 [ 31.771398] __vm_munmap+0x138/0x3a0 [ 31.771924] __x64_sys_munmap+0x59/0x80 [ 31.772457] do_syscall_64+0x3f/0x90 [ 31.772963] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.773659] [ 31.773894] Second to last potentially related work creation: [ 31.774627] kasan_save_stack+0x22/0x50 [ 31.775170] __kasan_record_aux_stack+0x8e/0xa0 [ 31.775792] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.776490] remove_vma+0x139/0x170 [ 31.776978] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.777579] do_vmi_munmap+0x1f1/0x2b0 [ 31.778109] __vm_munmap+0x138/0x3a0 [ 31.778618] elf_map+0x26f/0x310 [ 31.779094] load_elf_binary+0xd82/0x5030 [ 31.779672] bprm_execve+0x803/0x1940 [ 31.780179] do_execveat_common+0x734/0x8e0 [ 31.780741] __x64_sys_execve+0x93/0xc0 [ 31.781271] do_syscall_64+0x3f/0x90 [ 31.781791] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.782483] [ 31.782711] The buggy address belongs to the object at ffff88800d27e658 [ 31.782711] which belongs to the cache vm_area_struct of size 168 [ 31.784295] The buggy address is located 88 bytes inside of [ 31.784295] freed 168-byte region [ffff88800d27e658, ffff88800d27e700) [ 31.785786] [ 31.786018] The buggy address belongs to the physical page: [ 31.786730] page:0000000015b85d47 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd27e [ 31.787911] memcg:ffff88800b359701 [ 31.788370] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.789062] page_type: 0xffffffff() [ 31.789543] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.790533] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800b359701 [ 31.791516] page dumped because: kasan: bad access detected [ 31.792235] [ 31.792467] Memory state around the buggy address: [ 31.793094] ffff88800d27e580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.794014] ffff88800d27e600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.794932] >ffff88800d27e680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.795865] ^ [ 31.796495] ffff88800d27e700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.797421] ffff88800d27e780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.798343] ================================================================== [ 31.799505] Disabling lock debugging due to kernel taint [ 34.009752] BUG: Bad rss-counter state mm:000000004d07f4ae type:MM_FILEPAGES val:33 [ 34.011386] BUG: Bad rss-counter state mm:000000004d07f4ae type:MM_ANONPAGES val:22 [ 34.578879] BUG: Bad rss-counter state mm:00000000a6283cf8 type:MM_FILEPAGES val:33 [ 34.580107] BUG: Bad rss-counter state mm:00000000a6283cf8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37409' (ECDSA) to the list of known hosts. 2023/06/20 20:00:29 fuzzer started 2023/06/20 20:00:29 dialing manager at localhost:36067 2023/06/20 20:00:29 checking machine... 2023/06/20 20:00:29 checking revisions... [ 35.328745] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:00:29 testing simple program... [ 35.369915] cgroup: Unknown subsys name 'net' [ 35.422178] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:00:29 Registers: info registers vcpu 0 RAX=ffffffff860d825b RBX=0000000000000001 RCX=ffffffff860d8256 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888015c47bd8 RSP=ffff888015c47b10 R8 =ffffffff860d825a R9 =ffff888015c47bc0 R10=0000000000038001 R11=0000000000010b8d R12=ffff888015c47be0 R13=ffff888015c47bc8 R14=ffff888015c47bc1 R15=ffff888015c47b80 RIP=ffffffff81130abf 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 00007fb68bf6d900 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=00007fb68bf2101c CR3=000000000e75e000 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=0000000000000001 RBX=dffffc0000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800fb72468 RBP=ffff88800fb72450 RSP=ffff88801476fe38 R8 =0000000000000001 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88800fb723b8 R13=ffff88800fb71b40 R14=0000000000000001 R15=ffff88800e063b80 RIP=ffffffff812d8e64 RFL=00000046 [---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 00007f0a0cac7900 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=00007f0a0bef8f00 CR3=000000000d5f6000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=1c21565b13e1b6e200000000000ae988 XMM05=0d7e2a703a7b6a730000000000134908 XMM06=e4cb8bb95a7664b600000000001337a0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000