syzkaller login: [ 31.451637] BUG: Bad rss-counter state mm:00000000197d6616 type:MM_FILEPAGES val:32 [ 31.452869] BUG: Bad rss-counter state mm:00000000197d6616 type:MM_ANONPAGES val:22 [ 31.489562] ================================================================== [ 31.490546] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.491503] Read of size 8 at addr ffff88800dfa8310 by task sshd/221 [ 31.492395] [ 31.492622] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.493500] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.494521] Call Trace: [ 31.494860] [ 31.495150] dump_stack_lvl+0x91/0xf0 [ 31.495660] print_report+0xcc/0x620 [ 31.496150] ? __virt_addr_valid+0x102/0x340 [ 31.496730] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.497366] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.497990] kasan_report+0xbe/0xf0 [ 31.498475] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.499097] vma_interval_tree_remove+0xc75/0xec0 [ 31.499706] vma_prepare+0xc54/0x11a0 [ 31.500185] __split_vma+0x5af/0x950 [ 31.500675] ? __pfx___split_vma+0x10/0x10 [ 31.501215] ? find_held_lock+0x2c/0x110 [ 31.501744] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.502320] ? lock_is_held_type+0x9f/0x120 [ 31.502874] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.503483] ? mtree_range_walk+0x632/0x900 [ 31.504047] ? mas_walk+0x5c7/0x7c0 [ 31.504540] do_vmi_munmap+0x1f1/0x2b0 [ 31.505040] mmap_region+0x1f9/0x2660 [ 31.505524] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.506040] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.506762] ? __pfx_lock_acquire+0x10/0x10 [ 31.507302] ? __pfx_mmap_region+0x10/0x10 [ 31.507835] ? security_mmap_addr+0x7d/0xa0 [ 31.508391] ? get_unmapped_area+0x1f5/0x3f0 [ 31.508951] do_mmap+0x854/0xf00 [ 31.509395] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.509898] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.510465] ksys_mmap_pgoff+0x3af/0x500 [ 31.510987] do_syscall_64+0x3f/0x90 [ 31.511474] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.512127] RIP: 0033:0x7f7dab3bfd82 [ 31.512604] 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 [ 31.514768] RSP: 002b:00007fff70205818 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.515692] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7dab3bfd82 [ 31.516554] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7daa7f9000 [ 31.517414] RBP: 00007f7daa7f9000 R08: 0000000000000009 R09: 0000000000001000 [ 31.518268] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556d5301fec0 [ 31.519125] R13: 00007fff70205830 R14: 00007fff70205860 R15: 00007fff70205bc0 [ 31.519991] [ 31.520286] [ 31.520528] Allocated by task 214: [ 31.520969] kasan_save_stack+0x22/0x50 [ 31.521487] kasan_set_track+0x25/0x30 [ 31.521986] __kasan_slab_alloc+0x59/0x70 [ 31.522519] kmem_cache_alloc+0x16b/0x370 [ 31.523047] vm_area_dup+0x20/0x160 [ 31.523513] __split_vma+0x170/0x950 [ 31.523982] split_vma+0xc6/0x110 [ 31.524440] mprotect_fixup+0x8d2/0xb30 [ 31.524946] do_mprotect_pkey+0x87e/0xd40 [ 31.525465] __x64_sys_mprotect+0x78/0xc0 [ 31.525988] do_syscall_64+0x3f/0x90 [ 31.526471] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.527118] [ 31.527341] Freed by task 214: [ 31.527740] kasan_save_stack+0x22/0x50 [ 31.528246] kasan_set_track+0x25/0x30 [ 31.528772] kasan_save_free_info+0x2b/0x50 [ 31.529320] __kasan_slab_free+0x10a/0x190 [ 31.529869] kmem_cache_free+0x10d/0x4d0 [ 31.530385] rcu_core+0x8c8/0x2860 [ 31.530836] __do_softirq+0x1b7/0x7d4 [ 31.531320] [ 31.531539] Last potentially related work creation: [ 31.532138] kasan_save_stack+0x22/0x50 [ 31.532666] __kasan_record_aux_stack+0x8e/0xa0 [ 31.533254] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.533933] remove_vma+0x139/0x170 [ 31.534391] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.534961] do_vmi_munmap+0x1f1/0x2b0 [ 31.535457] __vm_munmap+0x138/0x3a0 [ 31.535934] __x64_sys_munmap+0x59/0x80 [ 31.536451] do_syscall_64+0x3f/0x90 [ 31.536937] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.537599] [ 31.537820] The buggy address belongs to the object at ffff88800dfa82b8 [ 31.537820] which belongs to the cache vm_area_struct of size 168 [ 31.539310] The buggy address is located 88 bytes inside of [ 31.539310] freed 168-byte region [ffff88800dfa82b8, ffff88800dfa8360) [ 31.540757] [ 31.540978] The buggy address belongs to the physical page: [ 31.541650] page:0000000026bb63af refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdfa8 [ 31.542744] memcg:ffff88800e4ca101 [ 31.543181] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.543830] page_type: 0xffffffff() [ 31.544290] raw: 0100000000000200 ffff8880087a0c80 ffffea0000367600 dead000000000006 [ 31.545249] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e4ca101 [ 31.546169] page dumped because: kasan: bad access detected [ 31.546847] [ 31.547064] Memory state around the buggy address: [ 31.547656] ffff88800dfa8200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.548548] ffff88800dfa8280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.549418] >ffff88800dfa8300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.550288] ^ [ 31.550762] ffff88800dfa8380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.551634] ffff88800dfa8400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.552500] ================================================================== [ 31.553688] Disabling lock debugging due to kernel taint [ 33.396459] BUG: Bad rss-counter state mm:00000000ed379cd9 type:MM_FILEPAGES val:33 [ 33.397434] BUG: Bad rss-counter state mm:00000000ed379cd9 type:MM_ANONPAGES val:22 [ 34.003910] BUG: Bad rss-counter state mm:000000007a407121 type:MM_FILEPAGES val:33 [ 34.005176] BUG: Bad rss-counter state mm:000000007a407121 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54854' (ECDSA) to the list of known hosts. 2023/06/20 18:36:23 fuzzer started 2023/06/20 18:36:23 dialing manager at localhost:36067 2023/06/20 18:36:23 checking machine... 2023/06/20 18:36:23 checking revisions... [ 34.643250] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:36:23 testing simple program... [ 34.689000] cgroup: Unknown subsys name 'net' [ 34.729175] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:36:23 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000001 RCX=ffffffff8180c6a1 RDX=00000000000080c6 RSI=00000000000080c6 RDI=ffffffff86509d08 RBP=ffff88806ce09aa8 RSP=ffff88806ce099e0 R8 =0000000000000000 R9 =ffff88806ce09a90 R10=0000000000038001 R11=0000000000010b8d R12=ffff88806ce09ab0 R13=ffff88806ce09a98 R14=ffff88806ce09a91 R15=ffff88806ce09a50 RIP=ffffffff8113078b 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 00007f932de88900 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=00007f932e43d650 CR3=000000001be5e000 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=ffffffff8113b95b RCX=0000000000000001 RDX=1ffff11001b11ecf RSI=ffff88800d88fea8 RDI=ffffffff8113b95b RBP=ffff88800d88f678 RSP=ffff88800d88f5f0 R8 =0000000000000001 R9 =ffff88800d88f660 R10=0000000000038001 R11=000000000001ddb6 R12=ffff88800d88f6e8 R13=0000000000000000 R14=ffff888014340000 R15=ffff88800deb8720 RIP=ffffffff811fc7a0 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fd4d2bd4900 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=00007fd4d2025d60 CR3=000000000f2d8000 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=63cb6e7c97f5ecbd00000000000ae988 XMM05=fd71aa35b4a40d070000000000133208 XMM06=59d5b690e0af863b00000000001320a0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000