syzkaller login: [ 32.541178] BUG: Bad rss-counter state mm:00000000baaa2039 type:MM_FILEPAGES val:33 [ 32.543211] BUG: Bad rss-counter state mm:00000000baaa2039 type:MM_ANONPAGES val:22 [ 32.710251] ================================================================== [ 32.711213] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.712208] Read of size 8 at addr ffff88800efda140 by task sshd/221 [ 32.713145] [ 32.713378] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.714280] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.715375] Call Trace: [ 32.715713] [ 32.716022] dump_stack_lvl+0x91/0xf0 [ 32.716528] print_report+0xcc/0x620 [ 32.717037] ? __virt_addr_valid+0x102/0x340 [ 32.717645] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.718318] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.718979] kasan_report+0xbe/0xf0 [ 32.719486] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.720152] vma_interval_tree_remove+0xc75/0xec0 [ 32.720779] vma_prepare+0xc54/0x11a0 [ 32.721309] __split_vma+0x5af/0x950 [ 32.721799] ? __pfx___split_vma+0x10/0x10 [ 32.722376] ? find_held_lock+0x2c/0x110 [ 32.722922] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.723533] ? lock_is_held_type+0x9f/0x120 [ 32.724116] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.724750] ? mtree_range_walk+0x632/0x900 [ 32.725366] ? mas_walk+0x5c7/0x7c0 [ 32.725861] do_vmi_munmap+0x1f1/0x2b0 [ 32.726515] mmap_region+0x1f9/0x2660 [ 32.727172] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.727871] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.728657] ? __pfx_lock_acquire+0x10/0x10 [ 32.729404] ? __pfx_mmap_region+0x10/0x10 [ 32.730176] ? security_mmap_addr+0x7d/0xa0 [ 32.730737] ? get_unmapped_area+0x1f5/0x3f0 [ 32.731422] do_mmap+0x854/0xf00 [ 32.732025] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.732705] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.733349] ksys_mmap_pgoff+0x3af/0x500 [ 32.733935] do_syscall_64+0x3f/0x90 [ 32.734607] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.735538] RIP: 0033:0x7fb90d09cd82 [ 32.736102] 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 [ 32.738972] RSP: 002b:00007ffc6803fcd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.740183] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb90d09cd82 [ 32.741311] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb90c4d6000 [ 32.742433] RBP: 00007fb90c4d6000 R08: 0000000000000009 R09: 0000000000001000 [ 32.743560] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b3e59d4f70 [ 32.744692] R13: 00007ffc6803fcf0 R14: 00007ffc6803fd20 R15: 00007ffc68040080 [ 32.745902] [ 32.746304] [ 32.746598] Allocated by task 214: [ 32.747182] kasan_save_stack+0x22/0x50 [ 32.747880] kasan_set_track+0x25/0x30 [ 32.748567] __kasan_slab_alloc+0x59/0x70 [ 32.749323] kmem_cache_alloc+0x16b/0x370 [ 32.750061] vm_area_dup+0x20/0x160 [ 32.750695] __split_vma+0x170/0x950 [ 32.751330] split_vma+0xc6/0x110 [ 32.751932] mprotect_fixup+0x8d2/0xb30 [ 32.752614] do_mprotect_pkey+0x87e/0xd40 [ 32.753354] __x64_sys_mprotect+0x78/0xc0 [ 32.754094] do_syscall_64+0x3f/0x90 [ 32.754740] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.755611] [ 32.755904] Freed by task 214: [ 32.756439] kasan_save_stack+0x22/0x50 [ 32.757160] kasan_set_track+0x25/0x30 [ 32.757842] kasan_save_free_info+0x2b/0x50 [ 32.758581] __kasan_slab_free+0x10a/0x190 [ 32.759314] kmem_cache_free+0x10d/0x4d0 [ 32.760005] rcu_core+0x8c8/0x2860 [ 32.760626] __do_softirq+0x1b7/0x7d4 [ 32.761307] [ 32.761599] Last potentially related work creation: [ 32.762400] kasan_save_stack+0x22/0x50 [ 32.763083] __kasan_record_aux_stack+0x8e/0xa0 [ 32.763862] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.764749] remove_vma+0x139/0x170 [ 32.765379] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.766143] do_vmi_munmap+0x1f1/0x2b0 [ 32.766799] __vm_munmap+0x138/0x3a0 [ 32.767442] __x64_sys_munmap+0x59/0x80 [ 32.768117] do_syscall_64+0x3f/0x90 [ 32.768760] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.769528] [ 32.769762] The buggy address belongs to the object at ffff88800efda0e8 [ 32.769762] which belongs to the cache vm_area_struct of size 168 [ 32.771315] The buggy address is located 88 bytes inside of [ 32.771315] freed 168-byte region [ffff88800efda0e8, ffff88800efda190) [ 32.772773] [ 32.772996] The buggy address belongs to the physical page: [ 32.773695] page:000000002dced0ef refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xefda [ 32.774836] memcg:ffff88800d677501 [ 32.775289] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.775980] page_type: 0xffffffff() [ 32.776450] raw: 0100000000000200 ffff88800879fc80 ffffea000058a480 dead000000000006 [ 32.777432] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d677501 [ 32.778381] page dumped because: kasan: bad access detected [ 32.779072] [ 32.779298] Memory state around the buggy address: [ 32.779910] ffff88800efda000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.780799] ffff88800efda080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 32.781700] >ffff88800efda100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.782589] ^ [ 32.783259] ffff88800efda180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 32.784143] ffff88800efda200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 32.785025] ================================================================== [ 32.786113] Disabling lock debugging due to kernel taint [ 35.780175] BUG: Bad rss-counter state mm:00000000271fb1d6 type:MM_FILEPAGES val:33 [ 35.781460] BUG: Bad rss-counter state mm:00000000271fb1d6 type:MM_ANONPAGES val:22 [ 36.255130] BUG: Bad rss-counter state mm:00000000e8a5d949 type:MM_FILEPAGES val:33 [ 36.256375] BUG: Bad rss-counter state mm:00000000e8a5d949 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54626' (ECDSA) to the list of known hosts. 2023/06/20 00:45:27 fuzzer started 2023/06/20 00:45:27 dialing manager at localhost:44161 2023/06/20 00:45:27 checking machine... 2023/06/20 00:45:27 checking revisions... [ 36.963151] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:45:28 testing simple program... [ 37.019899] cgroup: Unknown subsys name 'net' [ 37.082475] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:45:26 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000002 RCX=0000000000000100 RDX=ffff888016f31b40 RSI=ffffffff811431df RDI=0000000000000006 RBP=0000000010328080 RSP=ffff88806ce09d80 R8 =0000000000000006 R9 =0000000000000002 R10=0000000000080000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000800 R14=ffffffff813782a8 R15=ffff88800c720408 RIP=ffffffff81143387 RFL=00000256 [---ZAP-] 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 00007f00949ec900 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=00007f0094fa1650 CR3=000000001b846000 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=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8171ac7e RDX=00000000000071ac RSI=00000000000071ac RDI=ffffffff86504270 RBP=ffff88801472f678 RSP=ffff88801472f5b0 R8 =0000000000000000 R9 =ffff88801472f660 R10=0000000000038001 R11=000000000001dda2 R12=ffff88801472f680 R13=ffff88801472f668 R14=ffff88801472f661 R15=ffff88801472f620 RIP=ffffffff8113077a RFL=00000216 [----AP-] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f52260c1900 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=00007f52254d9e60 CR3=000000000d694000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=51070121c79a165600000000000ae988 XMM05=b942c92e90218e2600000000001351e0 XMM06=7f75e9128b737ce00000000000133f80 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000