syzkaller login: [ 30.316729] BUG: Bad rss-counter state mm:00000000d964364d type:MM_FILEPAGES val:33 [ 30.317733] BUG: Bad rss-counter state mm:00000000d964364d type:MM_ANONPAGES val:22 [ 30.491920] ================================================================== [ 30.492824] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.493767] Read of size 8 at addr ffff88801a31c4e0 by task sshd/220 [ 30.494638] [ 30.494866] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.495733] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.496724] Call Trace: [ 30.497057] [ 30.497339] dump_stack_lvl+0x91/0xf0 [ 30.497837] print_report+0xcc/0x620 [ 30.498323] ? __virt_addr_valid+0x102/0x340 [ 30.498887] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.499512] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.500139] kasan_report+0xbe/0xf0 [ 30.500620] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.501254] vma_interval_tree_remove+0xc75/0xec0 [ 30.501853] vma_prepare+0xc54/0x11a0 [ 30.502335] __split_vma+0x5af/0x950 [ 30.502835] ? __pfx___split_vma+0x10/0x10 [ 30.503361] ? find_held_lock+0x2c/0x110 [ 30.503895] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.504459] ? lock_is_held_type+0x9f/0x120 [ 30.504999] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.505615] ? mtree_range_walk+0x632/0x900 [ 30.506171] ? mas_walk+0x5c7/0x7c0 [ 30.506645] do_vmi_munmap+0x1f1/0x2b0 [ 30.507154] mmap_region+0x1f9/0x2660 [ 30.507639] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.508157] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.508870] ? __pfx_lock_acquire+0x10/0x10 [ 30.509404] ? __pfx_mmap_region+0x10/0x10 [ 30.509948] ? security_mmap_addr+0x7d/0xa0 [ 30.510485] ? get_unmapped_area+0x1f5/0x3f0 [ 30.511047] do_mmap+0x854/0xf00 [ 30.511490] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.511986] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.512551] ksys_mmap_pgoff+0x3af/0x500 [ 30.513068] do_syscall_64+0x3f/0x90 [ 30.513552] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.514195] RIP: 0033:0x7f9361bbcd82 [ 30.514657] 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 [ 30.516815] RSP: 002b:00007ffd2516f0f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.517736] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9361bbcd82 [ 30.518584] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9360ff6000 [ 30.519445] RBP: 00007f9360ff6000 R08: 0000000000000009 R09: 0000000000001000 [ 30.520293] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c6d285df70 [ 30.521136] R13: 00007ffd2516f110 R14: 00007ffd2516f140 R15: 00007ffd2516f4a0 [ 30.522013] [ 30.522319] [ 30.522543] Allocated by task 213: [ 30.522990] kasan_save_stack+0x22/0x50 [ 30.523501] kasan_set_track+0x25/0x30 [ 30.523998] __kasan_slab_alloc+0x59/0x70 [ 30.524523] kmem_cache_alloc+0x16b/0x370 [ 30.525045] vm_area_dup+0x20/0x160 [ 30.525505] __split_vma+0x170/0x950 [ 30.525972] split_vma+0xc6/0x110 [ 30.526421] mprotect_fixup+0x8d2/0xb30 [ 30.526945] do_mprotect_pkey+0x87e/0xd40 [ 30.527468] __x64_sys_mprotect+0x78/0xc0 [ 30.527992] do_syscall_64+0x3f/0x90 [ 30.528466] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.529103] [ 30.529318] Freed by task 213: [ 30.529714] kasan_save_stack+0x22/0x50 [ 30.530213] kasan_set_track+0x25/0x30 [ 30.530716] kasan_save_free_info+0x2b/0x50 [ 30.531252] __kasan_slab_free+0x10a/0x190 [ 30.531792] kmem_cache_free+0x10d/0x4d0 [ 30.532297] rcu_core+0x8c8/0x2860 [ 30.532740] __do_softirq+0x1b7/0x7d4 [ 30.533213] [ 30.533434] Last potentially related work creation: [ 30.534020] kasan_save_stack+0x22/0x50 [ 30.534519] __kasan_record_aux_stack+0x8e/0xa0 [ 30.535117] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.535760] remove_vma+0x139/0x170 [ 30.536212] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.536787] do_vmi_munmap+0x1f1/0x2b0 [ 30.537273] __vm_munmap+0x138/0x3a0 [ 30.537736] __x64_sys_munmap+0x59/0x80 [ 30.538235] do_syscall_64+0x3f/0x90 [ 30.538719] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.539360] [ 30.539575] The buggy address belongs to the object at ffff88801a31c488 [ 30.539575] which belongs to the cache vm_area_struct of size 168 [ 30.541043] The buggy address is located 88 bytes inside of [ 30.541043] freed 168-byte region [ffff88801a31c488, ffff88801a31c530) [ 30.542454] [ 30.542676] The buggy address belongs to the physical page: [ 30.543352] page:0000000073aaa6af refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a31c [ 30.544466] memcg:ffff88800c4edb01 [ 30.544895] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.545552] page_type: 0xffffffff() [ 30.546015] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.546947] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c4edb01 [ 30.547851] page dumped because: kasan: bad access detected [ 30.548515] [ 30.548733] Memory state around the buggy address: [ 30.549310] ffff88801a31c380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.550176] ffff88801a31c400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.551042] >ffff88801a31c480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.551900] ^ [ 30.552652] ffff88801a31c500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.553510] ffff88801a31c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.554376] ================================================================== [ 30.555357] Disabling lock debugging due to kernel taint [ 32.508999] BUG: Bad rss-counter state mm:00000000a5987581 type:MM_FILEPAGES val:33 [ 32.510247] BUG: Bad rss-counter state mm:00000000a5987581 type:MM_ANONPAGES val:22 [ 32.996254] BUG: Bad rss-counter state mm:000000003447fc37 type:MM_FILEPAGES val:33 [ 32.997293] BUG: Bad rss-counter state mm:000000003447fc37 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51803' (ECDSA) to the list of known hosts. 2023/06/19 12:47:09 fuzzer started 2023/06/19 12:47:09 dialing manager at localhost:44161 2023/06/19 12:47:09 checking machine... 2023/06/19 12:47:09 checking revisions... [ 33.753470] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:47:10 testing simple program... [ 33.804318] cgroup: Unknown subsys name 'net' [ 33.865848] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:47:07 Registers: info registers vcpu 0 RAX=ffffffff8661fd66 RBX=ffffffff86055ff4 RCX=ffffffff8661f20e RDX=0000000000000000 RSI=ffffffff860723cc RDI=ffffffff85d793d4 RBP=ffffffff86054830 RSP=ffff88806ce099e0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b5420 R12=ffffffff860577b8 R13=ffffffff85d793d4 R14=ffffffff8605482c R15=dffffc0000000000 RIP=ffffffff8112fc99 RFL=00000283 [--S---C] 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 0000000000000000 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=00007ffc1636ce08 CR3=000000000f6e0000 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=2039303a37343a3231203931206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039303a37343a3231203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff110028d7f6a RBX=0000000000000006 RCX=0000000000000001 RDX=0000000000000000 RSI=000000000000000c RDI=ffff8880146bfb50 RBP=dffffc0000000000 RSP=ffff8880146bfa90 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=000000000000000c R13=0000000000000000 R14=ffff8880146bfb20 R15=ffff88800cb36e00 RIP=ffffffff813ad5ca 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 00007f21d0d04900 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=00007fde7883a650 CR3=0000000009614000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=fe8a8b8e82283c4600000000000ae988 XMM05=a183c36d9a05af060000000000134dd8 XMM06=a328d01a766deba30000000000133b78 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000