syzkaller login: [ 52.340937] BUG: Bad rss-counter state mm:00000000581304d7 type:MM_FILEPAGES val:33 [ 52.341521] BUG: Bad rss-counter state mm:00000000581304d7 type:MM_ANONPAGES val:22 [ 52.369432] ================================================================== [ 52.370463] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 52.371415] Read of size 8 at addr ffff88800f2376b0 by task sshd/221 [ 52.372357] [ 52.372575] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 52.373434] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 52.374420] Call Trace: [ 52.374740] [ 52.375021] dump_stack_lvl+0x91/0xf0 [ 52.375531] print_report+0xcc/0x620 [ 52.376011] ? __virt_addr_valid+0x102/0x340 [ 52.376564] ? vma_interval_tree_remove+0xc75/0xec0 [ 52.377178] ? vma_interval_tree_remove+0xc75/0xec0 [ 52.377796] kasan_report+0xbe/0xf0 [ 52.378268] ? vma_interval_tree_remove+0xc75/0xec0 [ 52.378901] vma_interval_tree_remove+0xc75/0xec0 [ 52.379547] vma_prepare+0xc54/0x11a0 [ 52.380058] __split_vma+0x5af/0x950 [ 52.380556] ? __pfx___split_vma+0x10/0x10 [ 52.381104] ? find_held_lock+0x2c/0x110 [ 52.381650] do_vmi_align_munmap+0x2ba/0x11f0 [ 52.382247] ? lock_is_held_type+0x9f/0x120 [ 52.382816] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 52.383463] ? mtree_range_walk+0x632/0x900 [ 52.384045] ? mas_walk+0x5c7/0x7c0 [ 52.384532] do_vmi_munmap+0x1f1/0x2b0 [ 52.385042] mmap_region+0x1f9/0x2660 [ 52.385546] ? vm_mmap_pgoff+0x15c/0x3a0 [ 52.386075] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 52.386826] ? __pfx_lock_acquire+0x10/0x10 [ 52.387396] ? __pfx_mmap_region+0x10/0x10 [ 52.387953] ? security_mmap_addr+0x7d/0xa0 [ 52.388515] ? get_unmapped_area+0x1f5/0x3f0 [ 52.389105] do_mmap+0x854/0xf00 [ 52.389564] vm_mmap_pgoff+0x1a6/0x3a0 [ 52.390079] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 52.390667] ksys_mmap_pgoff+0x3af/0x500 [ 52.391198] do_syscall_64+0x3f/0x90 [ 52.391706] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 52.392379] RIP: 0033:0x7fe71d0ded82 [ 52.392857] 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 [ 52.395083] RSP: 002b:00007fff9800f598 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 52.396064] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe71d0ded82 [ 52.396943] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe71c518000 [ 52.397836] RBP: 00007fe71c518000 R08: 0000000000000009 R09: 0000000000001000 [ 52.398712] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564a9bc45980 [ 52.399607] R13: 00007fff9800f5b0 R14: 00007fff9800f5e0 R15: 00007fff9800f940 [ 52.400503] [ 52.400805] [ 52.401029] Allocated by task 213: [ 52.401480] kasan_save_stack+0x22/0x50 [ 52.402006] kasan_set_track+0x25/0x30 [ 52.402517] __kasan_slab_alloc+0x59/0x70 [ 52.403071] kmem_cache_alloc+0x16b/0x370 [ 52.403615] vm_area_dup+0x20/0x160 [ 52.404082] __split_vma+0x170/0x950 [ 52.404574] split_vma+0xc6/0x110 [ 52.405041] mprotect_fixup+0x8d2/0xb30 [ 52.405563] do_mprotect_pkey+0x87e/0xd40 [ 52.406106] __x64_sys_mprotect+0x78/0xc0 [ 52.406652] do_syscall_64+0x3f/0x90 [ 52.407136] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 52.407828] [ 52.408049] Freed by task 213: [ 52.408453] kasan_save_stack+0x22/0x50 [ 52.408975] kasan_set_track+0x25/0x30 [ 52.409487] kasan_save_free_info+0x2b/0x50 [ 52.410040] __kasan_slab_free+0x10a/0x190 [ 52.410600] kmem_cache_free+0x10d/0x4d0 [ 52.411130] rcu_core+0x8c8/0x2860 [ 52.411601] __do_softirq+0x1b7/0x7d4 [ 52.412098] [ 52.412318] Last potentially related work creation: [ 52.412939] kasan_save_stack+0x22/0x50 [ 52.413457] __kasan_record_aux_stack+0x8e/0xa0 [ 52.414055] __call_rcu_common.constprop.0+0x6a/0xb90 [ 52.414717] remove_vma+0x139/0x170 [ 52.415187] do_vmi_align_munmap+0xd4a/0x11f0 [ 52.415794] do_vmi_munmap+0x1f1/0x2b0 [ 52.416303] __vm_munmap+0x138/0x3a0 [ 52.416785] __x64_sys_munmap+0x59/0x80 [ 52.417299] do_syscall_64+0x3f/0x90 [ 52.417798] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 52.418464] [ 52.418684] Second to last potentially related work creation: [ 52.419415] kasan_save_stack+0x22/0x50 [ 52.419936] __kasan_record_aux_stack+0x8e/0xa0 [ 52.420530] __call_rcu_common.constprop.0+0x6a/0xb90 [ 52.421196] remove_vma+0x139/0x170 [ 52.421668] do_vmi_align_munmap+0xd4a/0x11f0 [ 52.422242] do_vmi_munmap+0x1f1/0x2b0 [ 52.422744] mmap_region+0x1f9/0x2660 [ 52.423244] do_mmap+0x854/0xf00 [ 52.423692] vm_mmap_pgoff+0x1a6/0x3a0 [ 52.424200] ksys_mmap_pgoff+0x3af/0x500 [ 52.424722] do_syscall_64+0x3f/0x90 [ 52.425219] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 52.425898] [ 52.426119] The buggy address belongs to the object at ffff88800f237658 [ 52.426119] which belongs to the cache vm_area_struct of size 168 [ 52.427691] The buggy address is located 88 bytes inside of [ 52.427691] freed 168-byte region [ffff88800f237658, ffff88800f237700) [ 52.429153] [ 52.429373] The buggy address belongs to the physical page: [ 52.430064] page:00000000003517e4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf237 [ 52.431206] memcg:ffff88800e389a01 [ 52.431661] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 52.432388] page_type: 0xffffffff() [ 52.432864] raw: 0100000000000200 ffff88800879fc80 ffffea00003b2480 dead000000000007 [ 52.433826] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e389a01 [ 52.434780] page dumped because: kasan: bad access detected [ 52.435477] [ 52.435702] Memory state around the buggy address: [ 52.436320] ffff88800f237580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 52.437221] ffff88800f237600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 52.438132] >ffff88800f237680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 52.439027] ^ [ 52.439657] ffff88800f237700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 52.440556] ffff88800f237780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 52.441453] ================================================================== [ 52.442631] Disabling lock debugging due to kernel taint [ 54.495416] BUG: Bad rss-counter state mm:00000000033fc2fc type:MM_FILEPAGES val:33 [ 54.496638] BUG: Bad rss-counter state mm:00000000033fc2fc type:MM_ANONPAGES val:22 [ 54.879441] BUG: Bad rss-counter state mm:0000000078882124 type:MM_FILEPAGES val:33 [ 54.880519] BUG: Bad rss-counter state mm:0000000078882124 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18232' (ECDSA) to the list of known hosts. 2023/06/20 05:19:42 fuzzer started 2023/06/20 05:19:42 dialing manager at localhost:44161 2023/06/20 05:19:42 checking machine... 2023/06/20 05:19:42 checking revisions... [ 55.599822] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:19:43 testing simple program... [ 55.652691] cgroup: Unknown subsys name 'net' [ 55.701757] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:19:21 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000002 RCX=ffffffff813782a7 RDX=0000000000000003 RSI=ffffffff860d1670 RDI=ffffffff85db8aec RBP=ffff88806ce09af0 RSP=ffff88806ce099e0 R8 =ffffffff860d1670 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000fdc6 R12=ffffffff85db8af4 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff8112fc27 RFL=00000206 [-----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 00007fdf7a6f6900 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=00007fdf7acad618 CR3=00000000191ba000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f2062923b20 CR3=000000000e22c000 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=2032343a39313a3530203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032343a39313a3530203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000