syzkaller login: [ 30.567330] BUG: Bad rss-counter state mm:000000004ff3b305 type:MM_FILEPAGES val:33 [ 30.568770] BUG: Bad rss-counter state mm:000000004ff3b305 type:MM_ANONPAGES val:22 [ 30.734908] ================================================================== [ 30.735780] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.736662] Read of size 8 at addr ffff88800d7505c8 by task sshd/220 [ 30.737430] [ 30.737646] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.738691] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.739607] Call Trace: [ 30.739907] [ 30.740179] dump_stack_lvl+0x91/0xf0 [ 30.740664] print_report+0xcc/0x620 [ 30.741153] ? __virt_addr_valid+0x102/0x340 [ 30.741673] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.742264] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.742877] kasan_report+0xbe/0xf0 [ 30.743354] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.743963] vma_interval_tree_remove+0xc75/0xec0 [ 30.744566] vma_prepare+0xc54/0x11a0 [ 30.745082] __split_vma+0x5af/0x950 [ 30.745545] ? __pfx___split_vma+0x10/0x10 [ 30.746076] ? find_held_lock+0x2c/0x110 [ 30.746595] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.747154] ? lock_is_held_type+0x9f/0x120 [ 30.747686] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.748289] ? mtree_range_walk+0x632/0x900 [ 30.748837] ? mas_walk+0x5c7/0x7c0 [ 30.749349] do_vmi_munmap+0x1f1/0x2b0 [ 30.749838] mmap_region+0x1f9/0x2660 [ 30.750323] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.750821] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.751523] ? __pfx_lock_acquire+0x10/0x10 [ 30.752048] ? __pfx_mmap_region+0x10/0x10 [ 30.752578] ? security_mmap_addr+0x7d/0xa0 [ 30.753144] ? get_unmapped_area+0x1f5/0x3f0 [ 30.753692] do_mmap+0x854/0xf00 [ 30.754127] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.754621] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.755181] ksys_mmap_pgoff+0x3af/0x500 [ 30.755685] do_syscall_64+0x3f/0x90 [ 30.756160] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.756798] RIP: 0033:0x7f8ea9d10d82 [ 30.757351] 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 [ 30.759941] RSP: 002b:00007ffffebc5788 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.761081] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8ea9d10d82 [ 30.762103] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8ea914a000 [ 30.762963] RBP: 00007f8ea914a000 R08: 0000000000000009 R09: 0000000000001000 [ 30.763807] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563f2beb2ec0 [ 30.764645] R13: 00007ffffebc57a0 R14: 00007ffffebc57d0 R15: 00007ffffebc5b30 [ 30.765514] [ 30.765805] [ 30.766021] Allocated by task 213: [ 30.766452] kasan_save_stack+0x22/0x50 [ 30.766955] kasan_set_track+0x25/0x30 [ 30.767452] __kasan_slab_alloc+0x59/0x70 [ 30.767980] kmem_cache_alloc+0x16b/0x370 [ 30.768497] vm_area_dup+0x20/0x160 [ 30.768977] __split_vma+0x170/0x950 [ 30.769447] split_vma+0xc6/0x110 [ 30.769881] mprotect_fixup+0x8d2/0xb30 [ 30.770377] do_mprotect_pkey+0x87e/0xd40 [ 30.770896] __x64_sys_mprotect+0x78/0xc0 [ 30.771423] do_syscall_64+0x3f/0x90 [ 30.771900] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.772546] [ 30.772762] Freed by task 203: [ 30.773167] kasan_save_stack+0x22/0x50 [ 30.773670] kasan_set_track+0x25/0x30 [ 30.774165] kasan_save_free_info+0x2b/0x50 [ 30.774694] __kasan_slab_free+0x10a/0x190 [ 30.775248] kmem_cache_free+0x10d/0x4d0 [ 30.775774] rcu_core+0x8c8/0x2860 [ 30.776230] __do_softirq+0x1b7/0x7d4 [ 30.776717] [ 30.776953] Last potentially related work creation: [ 30.777550] kasan_save_stack+0x22/0x50 [ 30.778069] __kasan_record_aux_stack+0x8e/0xa0 [ 30.778669] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.779327] remove_vma+0x139/0x170 [ 30.779875] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.780437] do_vmi_munmap+0x1f1/0x2b0 [ 30.780940] __vm_munmap+0x138/0x3a0 [ 30.781408] __x64_sys_munmap+0x59/0x80 [ 30.781917] do_syscall_64+0x3f/0x90 [ 30.782391] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.783045] [ 30.783262] Second to last potentially related work creation: [ 30.783970] kasan_save_stack+0x22/0x50 [ 30.784477] __kasan_record_aux_stack+0x8e/0xa0 [ 30.785074] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.785721] remove_vma+0x139/0x170 [ 30.786171] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.786732] do_vmi_munmap+0x1f1/0x2b0 [ 30.787218] __vm_munmap+0x138/0x3a0 [ 30.787688] elf_map+0x26f/0x310 [ 30.788135] load_elf_binary+0xd82/0x5030 [ 30.788674] bprm_execve+0x803/0x1940 [ 30.789175] do_execveat_common+0x734/0x8e0 [ 30.789712] __x64_sys_execve+0x93/0xc0 [ 30.790214] do_syscall_64+0x3f/0x90 [ 30.790693] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.791335] [ 30.791551] The buggy address belongs to the object at ffff88800d750570 [ 30.791551] which belongs to the cache vm_area_struct of size 168 [ 30.793041] The buggy address is located 88 bytes inside of [ 30.793041] freed 168-byte region [ffff88800d750570, ffff88800d750618) [ 30.794465] [ 30.794681] The buggy address belongs to the physical page: [ 30.795338] page:00000000276d055d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd750 [ 30.796416] memcg:ffff88800c962301 [ 30.796841] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.797507] page_type: 0xffffffff() [ 30.797959] raw: 0100000000000200 ffff8880087a0c80 ffffea000038a340 dead000000000002 [ 30.798875] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c962301 [ 30.799787] page dumped because: kasan: bad access detected [ 30.800456] [ 30.800674] Memory state around the buggy address: [ 30.801268] ffff88800d750480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.802135] ffff88800d750500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.803008] >ffff88800d750580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.803862] ^ [ 30.804525] ffff88800d750600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 30.805394] ffff88800d750680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.806242] ================================================================== [ 30.807195] Disabling lock debugging due to kernel taint [ 33.121886] BUG: Bad rss-counter state mm:00000000ddbbc331 type:MM_FILEPAGES val:33 [ 33.122885] BUG: Bad rss-counter state mm:00000000ddbbc331 type:MM_ANONPAGES val:22 [ 33.696587] BUG: Bad rss-counter state mm:00000000e1ee6965 type:MM_FILEPAGES val:33 [ 33.697835] BUG: Bad rss-counter state mm:00000000e1ee6965 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34286' (ECDSA) to the list of known hosts. 2023/06/20 23:48:55 fuzzer started 2023/06/20 23:48:56 dialing manager at localhost:36067 2023/06/20 23:48:56 checking machine... 2023/06/20 23:48:56 checking revisions... [ 34.405272] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:48:56 testing simple program... [ 34.448428] cgroup: Unknown subsys name 'net' [ 34.485533] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:48:55 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000001 RCX=ffffffff8614ed0e RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88801817f9d0 RSP=ffff88801817f908 R8 =ffffffff8614ed12 R9 =ffff88801817f9b8 R10=0000000000038001 R11=00000000000247f6 R12=ffff88801817f9d8 R13=ffff88801817f9c0 R14=ffff88801817f9b9 R15=ffff88801817f978 RIP=ffffffff81130ad0 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 00007f44612f2900 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=00007f44618a7650 CR3=000000000ee3c000 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=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=00007f2c0c2154d0 CR3=000000000c6d2000 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=4c894086bb322282f749301e6ab4fbf0 XMM02=000000000011af60ec2efd57dc4c00df XMM03=00000000001218284f067dba1cd97943 XMM04=a637af589629133600000000000ae988 XMM05=19e9129bd510f2350000000000132d78 XMM06=4fda316b135da52b0000000000132c00 XMM07=e042d86d42eb936e0000000000121aa8 XMM08=4f067dba1cd97943000000000011afc0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000