syzkaller login: [ 46.335123] BUG: Bad rss-counter state mm:00000000f619c5ce type:MM_FILEPAGES val:33 [ 46.336725] BUG: Bad rss-counter state mm:00000000f619c5ce type:MM_ANONPAGES val:22 [ 46.507831] ================================================================== [ 46.508977] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 46.510160] Read of size 8 at addr ffff88800cbdda50 by task sshd/218 [ 46.511351] [ 46.511657] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 46.512743] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 46.513975] Call Trace: [ 46.514372] [ 46.514731] dump_stack_lvl+0x91/0xf0 [ 46.515344] print_report+0xcc/0x620 [ 46.515973] ? __virt_addr_valid+0x102/0x340 [ 46.516663] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.517382] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.517976] kasan_report+0xbe/0xf0 [ 46.518436] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.519029] vma_interval_tree_remove+0xc75/0xec0 [ 46.519610] vma_prepare+0xc54/0x11a0 [ 46.520088] __split_vma+0x5af/0x950 [ 46.520546] ? __pfx___split_vma+0x10/0x10 [ 46.521056] ? find_held_lock+0x2c/0x110 [ 46.521560] do_vmi_align_munmap+0x2ba/0x11f0 [ 46.522113] ? lock_is_held_type+0x9f/0x120 [ 46.522630] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 46.523217] ? mtree_range_walk+0x632/0x900 [ 46.523775] ? mas_walk+0x5c7/0x7c0 [ 46.524231] do_vmi_munmap+0x1f1/0x2b0 [ 46.524724] mmap_region+0x1f9/0x2660 [ 46.525223] ? vm_mmap_pgoff+0x15c/0x3a0 [ 46.525750] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 46.526474] ? __pfx_lock_acquire+0x10/0x10 [ 46.527018] ? __pfx_mmap_region+0x10/0x10 [ 46.527555] ? security_mmap_addr+0x7d/0xa0 [ 46.528112] ? get_unmapped_area+0x1f5/0x3f0 [ 46.528661] do_mmap+0x854/0xf00 [ 46.529105] vm_mmap_pgoff+0x1a6/0x3a0 [ 46.529624] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 46.530205] ksys_mmap_pgoff+0x3af/0x500 [ 46.530726] do_syscall_64+0x3f/0x90 [ 46.531214] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.531879] RIP: 0033:0x7faac0309d82 [ 46.532338] 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 [ 46.534497] RSP: 002b:00007ffefd798f38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 46.535418] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faac0309d82 [ 46.536295] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faabf743000 [ 46.537151] RBP: 00007faabf743000 R08: 0000000000000009 R09: 0000000000001000 [ 46.537997] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c422147ec0 [ 46.538842] R13: 00007ffefd798f50 R14: 00007ffefd798f80 R15: 00007ffefd7992e0 [ 46.539703] [ 46.540003] [ 46.540222] Allocated by task 211: [ 46.540651] kasan_save_stack+0x22/0x50 [ 46.541156] kasan_set_track+0x25/0x30 [ 46.541648] __kasan_slab_alloc+0x59/0x70 [ 46.542175] kmem_cache_alloc+0x16b/0x370 [ 46.542692] vm_area_dup+0x20/0x160 [ 46.543153] __split_vma+0x170/0x950 [ 46.543643] split_vma+0xc6/0x110 [ 46.544097] mprotect_fixup+0x8d2/0xb30 [ 46.544603] do_mprotect_pkey+0x87e/0xd40 [ 46.545124] __x64_sys_mprotect+0x78/0xc0 [ 46.545648] do_syscall_64+0x3f/0x90 [ 46.546127] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.546774] [ 46.546987] Freed by task 202: [ 46.547388] kasan_save_stack+0x22/0x50 [ 46.547901] kasan_set_track+0x25/0x30 [ 46.548391] kasan_save_free_info+0x2b/0x50 [ 46.548925] __kasan_slab_free+0x10a/0x190 [ 46.549459] kmem_cache_free+0x10d/0x4d0 [ 46.549969] rcu_core+0x8c8/0x2860 [ 46.550407] __do_softirq+0x1b7/0x7d4 [ 46.550874] [ 46.551087] Last potentially related work creation: [ 46.551672] kasan_save_stack+0x22/0x50 [ 46.552240] __kasan_record_aux_stack+0x8e/0xa0 [ 46.552814] __call_rcu_common.constprop.0+0x6a/0xb90 [ 46.553446] remove_vma+0x139/0x170 [ 46.553893] do_vmi_align_munmap+0xd4a/0x11f0 [ 46.554447] do_vmi_munmap+0x1f1/0x2b0 [ 46.554930] __vm_munmap+0x138/0x3a0 [ 46.555387] __x64_sys_munmap+0x59/0x80 [ 46.555891] do_syscall_64+0x3f/0x90 [ 46.556362] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.557001] [ 46.557215] Second to last potentially related work creation: [ 46.557891] kasan_save_stack+0x22/0x50 [ 46.558387] __kasan_record_aux_stack+0x8e/0xa0 [ 46.558952] __call_rcu_common.constprop.0+0x6a/0xb90 [ 46.559595] remove_vma+0x139/0x170 [ 46.560053] do_vmi_align_munmap+0xd4a/0x11f0 [ 46.560609] do_vmi_munmap+0x1f1/0x2b0 [ 46.561094] __vm_munmap+0x138/0x3a0 [ 46.561561] elf_map+0x26f/0x310 [ 46.562003] load_elf_binary+0x3417/0x5030 [ 46.562631] bprm_execve+0x803/0x1940 [ 46.563184] do_execveat_common+0x734/0x8e0 [ 46.563812] __x64_sys_execve+0x93/0xc0 [ 46.564388] do_syscall_64+0x3f/0x90 [ 46.564941] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.565689] [ 46.565945] The buggy address belongs to the object at ffff88800cbdd9f8 [ 46.565945] which belongs to the cache vm_area_struct of size 168 [ 46.567662] The buggy address is located 88 bytes inside of [ 46.567662] freed 168-byte region [ffff88800cbdd9f8, ffff88800cbddaa0) [ 46.569302] [ 46.569562] The buggy address belongs to the physical page: [ 46.570336] page:00000000d1110f8c refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800cbddd98 pfn:0xcbdd [ 46.571798] memcg:ffff88800ecf1c01 [ 46.572301] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 46.573123] page_type: 0xffffffff() [ 46.573641] raw: 0100000000000200 ffff88800879fc80 ffffea000035f740 dead000000000005 [ 46.574719] raw: ffff88800cbddd98 000000008011000c 00000001ffffffff ffff88800ecf1c01 [ 46.575767] page dumped because: kasan: bad access detected [ 46.576532] [ 46.576784] Memory state around the buggy address: [ 46.577462] ffff88800cbdd900: fc fc fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 46.578443] ffff88800cbdd980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 46.579431] >ffff88800cbdda00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 46.580413] ^ [ 46.581221] ffff88800cbdda80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 46.582180] ffff88800cbddb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 46.583161] ================================================================== [ 46.584285] Disabling lock debugging due to kernel taint [ 49.123719] BUG: Bad rss-counter state mm:00000000bbf0694c type:MM_FILEPAGES val:33 [ 49.124938] BUG: Bad rss-counter state mm:00000000bbf0694c type:MM_ANONPAGES val:22 [ 49.606946] BUG: Bad rss-counter state mm:00000000a0bd9a67 type:MM_FILEPAGES val:33 [ 49.608019] BUG: Bad rss-counter state mm:00000000a0bd9a67 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7753' (ECDSA) to the list of known hosts. 2023/06/19 17:31:26 fuzzer started 2023/06/19 17:31:26 dialing manager at localhost:44161 2023/06/19 17:31:26 checking machine... 2023/06/19 17:31:26 checking revisions... [ 50.360368] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:31:26 testing simple program... [ 50.401673] cgroup: Unknown subsys name 'net' [ 50.463818] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:31:18 Registers: info registers vcpu 0 RAX=ffff88800cb4a501 RBX=ffff888016437a3a RCX=0000000000000000 RDX=ffff888014563680 RSI=ffff88800cb4a500 RDI=0000000000000000 RBP=0000000000000003 RSP=ffff888016437950 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88800cb4a501 R13=ffff88800cb4a500 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff814c03b4 RFL=00000286 [--S--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 00007fe12d623700 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=00007fffe6c93de8 CR3=0000000018fdc000 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=00007fcca437a510000055b2a43ea790 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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007efc91321bd0 CR3=0000000018fdc000 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=2035323a31333a3731203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035323a31333a3731203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000