syzkaller login: [ 38.928356] BUG: Bad rss-counter state mm:0000000012044dfc type:MM_FILEPAGES val:33 [ 38.929560] BUG: Bad rss-counter state mm:0000000012044dfc type:MM_ANONPAGES val:22 [ 38.967836] ================================================================== [ 38.969016] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.970052] Read of size 8 at addr ffff88800dc71310 by task sshd/219 [ 38.970869] [ 38.971083] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.971942] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.972925] Call Trace: [ 38.973241] [ 38.973524] dump_stack_lvl+0x91/0xf0 [ 38.974016] print_report+0xcc/0x620 [ 38.974493] ? __virt_addr_valid+0x102/0x340 [ 38.975042] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.975657] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.976278] kasan_report+0xbe/0xf0 [ 38.976783] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.977405] vma_interval_tree_remove+0xc75/0xec0 [ 38.978008] vma_prepare+0xc54/0x11a0 [ 38.978479] __split_vma+0x5af/0x950 [ 38.978952] ? __pfx___split_vma+0x10/0x10 [ 38.979477] ? find_held_lock+0x2c/0x110 [ 38.979992] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.980566] ? lock_is_held_type+0x9f/0x120 [ 38.981114] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.981713] ? mtree_range_walk+0x632/0x900 [ 38.982259] ? mas_walk+0x5c7/0x7c0 [ 38.982739] do_vmi_munmap+0x1f1/0x2b0 [ 38.983226] mmap_region+0x1f9/0x2660 [ 38.983710] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.984219] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.984938] ? __pfx_lock_acquire+0x10/0x10 [ 38.985471] ? __pfx_mmap_region+0x10/0x10 [ 38.985996] ? security_mmap_addr+0x7d/0xa0 [ 38.986528] ? get_unmapped_area+0x1f5/0x3f0 [ 38.987073] do_mmap+0x854/0xf00 [ 38.987515] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.988007] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.988566] ksys_mmap_pgoff+0x3af/0x500 [ 38.989096] do_syscall_64+0x3f/0x90 [ 38.989571] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.990218] RIP: 0033:0x7fc424dfbd82 [ 38.990676] 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 [ 38.992808] RSP: 002b:00007ffc77b7b5f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.993705] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc424dfbd82 [ 38.994555] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc424235000 [ 38.995407] RBP: 00007fc424235000 R08: 0000000000000009 R09: 0000000000001000 [ 38.996426] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bce420bd90 [ 38.997305] R13: 00007ffc77b7b610 R14: 00007ffc77b7b640 R15: 00007ffc77b7b9a0 [ 38.998186] [ 38.998476] [ 38.998693] Allocated by task 212: [ 38.999120] kasan_save_stack+0x22/0x50 [ 38.999626] kasan_set_track+0x25/0x30 [ 39.000119] __kasan_slab_alloc+0x59/0x70 [ 39.000655] kmem_cache_alloc+0x16b/0x370 [ 39.001167] vm_area_dup+0x20/0x160 [ 39.001623] __split_vma+0x170/0x950 [ 39.002085] split_vma+0xc6/0x110 [ 39.002519] mprotect_fixup+0x8d2/0xb30 [ 39.003023] do_mprotect_pkey+0x87e/0xd40 [ 39.003544] __x64_sys_mprotect+0x78/0xc0 [ 39.004079] do_syscall_64+0x3f/0x90 [ 39.004578] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.005233] [ 39.005446] Freed by task 212: [ 39.005837] kasan_save_stack+0x22/0x50 [ 39.006341] kasan_set_track+0x25/0x30 [ 39.006833] kasan_save_free_info+0x2b/0x50 [ 39.007376] __kasan_slab_free+0x10a/0x190 [ 39.007907] kmem_cache_free+0x10d/0x4d0 [ 39.008407] rcu_core+0x8c8/0x2860 [ 39.008865] __do_softirq+0x1b7/0x7d4 [ 39.009336] [ 39.009549] Last potentially related work creation: [ 39.010136] kasan_save_stack+0x22/0x50 [ 39.010633] __kasan_record_aux_stack+0x8e/0xa0 [ 39.011207] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.011850] remove_vma+0x139/0x170 [ 39.012301] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.012862] do_vmi_munmap+0x1f1/0x2b0 [ 39.013345] __vm_munmap+0x138/0x3a0 [ 39.013806] __x64_sys_munmap+0x59/0x80 [ 39.014295] do_syscall_64+0x3f/0x90 [ 39.014777] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.015419] [ 39.015634] Second to last potentially related work creation: [ 39.016314] kasan_save_stack+0x22/0x50 [ 39.016833] __kasan_record_aux_stack+0x8e/0xa0 [ 39.017403] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.018051] remove_vma+0x139/0x170 [ 39.018496] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.019043] do_vmi_munmap+0x1f1/0x2b0 [ 39.019529] mmap_region+0x1f9/0x2660 [ 39.020012] do_mmap+0x854/0xf00 [ 39.020442] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.020942] ksys_mmap_pgoff+0x3af/0x500 [ 39.021441] do_syscall_64+0x3f/0x90 [ 39.021909] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.022561] [ 39.022774] The buggy address belongs to the object at ffff88800dc712b8 [ 39.022774] which belongs to the cache vm_area_struct of size 168 [ 39.024240] The buggy address is located 88 bytes inside of [ 39.024240] freed 168-byte region [ffff88800dc712b8, ffff88800dc71360) [ 39.025674] [ 39.025889] The buggy address belongs to the physical page: [ 39.026543] page:000000003db9cb33 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdc71 [ 39.027624] memcg:ffff88800edef801 [ 39.028054] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.028760] page_type: 0xffffffff() [ 39.029218] raw: 0100000000000200 ffff8880087a0c80 ffffea0000586500 dead000000000007 [ 39.030136] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800edef801 [ 39.031036] page dumped because: kasan: bad access detected [ 39.031692] [ 39.031905] Memory state around the buggy address: [ 39.032485] ffff88800dc71200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 39.033357] ffff88800dc71280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 39.034205] >ffff88800dc71300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 39.035056] ^ [ 39.035523] ffff88800dc71380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.036373] ffff88800dc71400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 39.037223] ================================================================== [ 39.038251] Disabling lock debugging due to kernel taint [ 41.063226] BUG: Bad rss-counter state mm:00000000b0309bb7 type:MM_FILEPAGES val:33 [ 41.064352] BUG: Bad rss-counter state mm:00000000b0309bb7 type:MM_ANONPAGES val:22 [ 41.423247] BUG: Bad rss-counter state mm:0000000078db7a32 type:MM_FILEPAGES val:33 [ 41.425000] BUG: Bad rss-counter state mm:0000000078db7a32 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58981' (ECDSA) to the list of known hosts. 2023/06/20 12:21:28 fuzzer started 2023/06/20 12:21:28 dialing manager at localhost:36067 2023/06/20 12:21:28 checking machine... 2023/06/20 12:21:28 checking revisions... [ 42.151959] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:21:28 testing simple program... [ 42.203128] cgroup: Unknown subsys name 'net' [ 42.270682] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:21:28 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8180c6a1 RDX=dffffc0000000000 RSI=ffffffff8180c6a2 RDI=ffff88800f097928 RBP=ffff88800f097980 RSP=ffff88800f0978b8 R8 =ffffffff860d825a R9 =ffff88800f097968 R10=0000000000038001 R11=0000000000010b8d R12=ffff88800f097988 R13=ffff88800f097970 R14=ffff88800f097969 R15=ffff88800f097928 RIP=ffffffff81130719 RFL=00000282 [--S----] 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 00007fc053189900 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=00007fc05373e650 CR3=000000000c6b6000 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=ffff88806cf35000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff81c61c9f RDI=0000000000000001 RBP=0000000000000000 RSP=ffff888015bbf8f8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6a61 R12=0000000000000008 R13=0000000000000c40 R14=ffff888019b46058 R15=ffffffff87f3e160 RIP=ffffffff8135b960 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f75f7cc9700 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=00007ffda530d8d8 CR3=000000001a0c4000 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=2038323a31323a3231203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a31323a3231203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000