syzkaller login: [ 46.538948] BUG: Bad rss-counter state mm:0000000037527073 type:MM_FILEPAGES val:33 [ 46.540628] BUG: Bad rss-counter state mm:0000000037527073 type:MM_ANONPAGES val:22 [ 46.698394] ================================================================== [ 46.699496] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 46.700618] Read of size 8 at addr ffff88800f0a7880 by task sshd/226 [ 46.701653] [ 46.701913] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 46.702940] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 46.703915] Call Trace: [ 46.704274] [ 46.704574] dump_stack_lvl+0x91/0xf0 [ 46.705082] print_report+0xcc/0x620 [ 46.705567] ? __virt_addr_valid+0x102/0x340 [ 46.706117] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.706750] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.707369] kasan_report+0xbe/0xf0 [ 46.707850] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.708489] vma_interval_tree_remove+0xc75/0xec0 [ 46.709155] vma_prepare+0xc54/0x11a0 [ 46.709648] __split_vma+0x5af/0x950 [ 46.710128] ? __pfx___split_vma+0x10/0x10 [ 46.710669] ? find_held_lock+0x2c/0x110 [ 46.711193] do_vmi_align_munmap+0x2ba/0x11f0 [ 46.711756] ? lock_is_held_type+0x9f/0x120 [ 46.712293] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 46.712894] ? mtree_range_walk+0x632/0x900 [ 46.713450] ? mas_walk+0x5c7/0x7c0 [ 46.713932] do_vmi_munmap+0x1f1/0x2b0 [ 46.714448] mmap_region+0x1f9/0x2660 [ 46.714932] ? vm_mmap_pgoff+0x15c/0x3a0 [ 46.715452] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 46.716175] ? __pfx_lock_acquire+0x10/0x10 [ 46.716715] ? __pfx_mmap_region+0x10/0x10 [ 46.717248] ? security_mmap_addr+0x7d/0xa0 [ 46.717781] ? get_unmapped_area+0x1f5/0x3f0 [ 46.718347] do_mmap+0x854/0xf00 [ 46.718799] vm_mmap_pgoff+0x1a6/0x3a0 [ 46.719297] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 46.719864] ksys_mmap_pgoff+0x3af/0x500 [ 46.720374] do_syscall_64+0x3f/0x90 [ 46.720853] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.721501] RIP: 0033:0x7f1c45df3d82 [ 46.721961] 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 [ 46.724120] RSP: 002b:00007ffe9948ae28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 46.725032] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1c45df3d82 [ 46.725884] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1c4522d000 [ 46.726763] RBP: 00007f1c4522d000 R08: 0000000000000009 R09: 0000000000001000 [ 46.727615] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561092947f70 [ 46.728462] R13: 00007ffe9948ae40 R14: 00007ffe9948ae70 R15: 00007ffe9948b1d0 [ 46.729318] [ 46.729612] [ 46.729831] Allocated by task 219: [ 46.730268] kasan_save_stack+0x22/0x50 [ 46.730793] kasan_set_track+0x25/0x30 [ 46.731288] __kasan_slab_alloc+0x59/0x70 [ 46.731814] kmem_cache_alloc+0x16b/0x370 [ 46.732336] vm_area_dup+0x20/0x160 [ 46.732800] __split_vma+0x170/0x950 [ 46.733272] split_vma+0xc6/0x110 [ 46.733722] mprotect_fixup+0x8d2/0xb30 [ 46.734227] do_mprotect_pkey+0x87e/0xd40 [ 46.734799] __x64_sys_mprotect+0x78/0xc0 [ 46.735328] do_syscall_64+0x3f/0x90 [ 46.735803] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.736448] [ 46.736667] Freed by task 219: [ 46.737060] kasan_save_stack+0x22/0x50 [ 46.737566] kasan_set_track+0x25/0x30 [ 46.738067] kasan_save_free_info+0x2b/0x50 [ 46.738611] __kasan_slab_free+0x10a/0x190 [ 46.739149] kmem_cache_free+0x10d/0x4d0 [ 46.739662] rcu_core+0x8c8/0x2860 [ 46.740108] __do_softirq+0x1b7/0x7d4 [ 46.740585] [ 46.740801] Last potentially related work creation: [ 46.741390] kasan_save_stack+0x22/0x50 [ 46.741896] __kasan_record_aux_stack+0x8e/0xa0 [ 46.742490] __call_rcu_common.constprop.0+0x6a/0xb90 [ 46.743136] remove_vma+0x139/0x170 [ 46.743590] do_vmi_align_munmap+0xd4a/0x11f0 [ 46.744155] do_vmi_munmap+0x1f1/0x2b0 [ 46.744642] __vm_munmap+0x138/0x3a0 [ 46.745115] __x64_sys_munmap+0x59/0x80 [ 46.745618] do_syscall_64+0x3f/0x90 [ 46.746093] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.746749] [ 46.746967] Second to last potentially related work creation: [ 46.747658] kasan_save_stack+0x22/0x50 [ 46.748163] __kasan_record_aux_stack+0x8e/0xa0 [ 46.748746] __call_rcu_common.constprop.0+0x6a/0xb90 [ 46.749389] remove_vma+0x139/0x170 [ 46.749843] do_vmi_align_munmap+0xd4a/0x11f0 [ 46.750407] do_vmi_munmap+0x1f1/0x2b0 [ 46.750909] __vm_munmap+0x138/0x3a0 [ 46.751379] __x64_sys_munmap+0x59/0x80 [ 46.751886] do_syscall_64+0x3f/0x90 [ 46.752361] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.753005] [ 46.753220] The buggy address belongs to the object at ffff88800f0a7828 [ 46.753220] which belongs to the cache vm_area_struct of size 168 [ 46.754694] The buggy address is located 88 bytes inside of [ 46.754694] freed 168-byte region [ffff88800f0a7828, ffff88800f0a78d0) [ 46.756111] [ 46.756326] The buggy address belongs to the physical page: [ 46.756985] page:0000000022f33041 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf0a7 [ 46.758074] memcg:ffff88800bef6901 [ 46.758511] flags: 0x100000000000200(slab|node=0|zone=1) [ 46.759158] page_type: 0xffffffff() [ 46.759612] raw: 0100000000000200 ffff88800879fc80 ffffea0000313e00 dead000000000004 [ 46.760537] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800bef6901 [ 46.761451] page dumped because: kasan: bad access detected [ 46.762117] [ 46.762337] Memory state around the buggy address: [ 46.762940] ffff88800f0a7780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 46.763805] ffff88800f0a7800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 46.764660] >ffff88800f0a7880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 46.765507] ^ [ 46.765922] ffff88800f0a7900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 46.766789] ffff88800f0a7980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 46.767643] ================================================================== [ 46.768621] Disabling lock debugging due to kernel taint [ 48.684847] BUG: Bad rss-counter state mm:000000000ea62f66 type:MM_FILEPAGES val:33 [ 48.686025] BUG: Bad rss-counter state mm:000000000ea62f66 type:MM_ANONPAGES val:22 [ 49.142062] BUG: Bad rss-counter state mm:0000000003e80898 type:MM_FILEPAGES val:33 [ 49.143227] BUG: Bad rss-counter state mm:0000000003e80898 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33854' (ECDSA) to the list of known hosts. 2023/06/19 22:59:56 fuzzer started 2023/06/19 22:59:56 dialing manager at localhost:44161 2023/06/19 22:59:56 checking machine... 2023/06/19 22:59:56 checking revisions... [ 49.851409] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:59:56 testing simple program... [ 49.890666] cgroup: Unknown subsys name 'net' [ 49.940469] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:59:48 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000004 RCX=0000000000000000 RDX=ffff88800ffe1b40 RSI=ffffffff818ea743 RDI=0000000000000005 RBP=000000000000000c RSP=ffff88801583fe58 R8 =0000000000000005 R9 =0000000000000001 R10=0000000000000004 R11=0000000000000000 R12=ffff888008c130c0 R13=0000000000004000 R14=dffffc0000000000 R15=0000000000000055 RIP=ffffffff814c081b 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 00007ff07ac11700 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=00007f26eb8db028 CR3=000000000e1ae000 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=2035353a39353a3232203931206e754a XMM01=657463656e6e6f63736944203a5d3533 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3533325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a39353a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00007ffd4cc1b4c0 RBX=00000000000000e1 RCX=00007ffd4cc1b500 RDX=000000000000231c RSI=0000000000000000 RDI=00007ffd4cc1b4c0 RBP=00000000000000f4 RSP=fffffe0000049fd0 R8 =00007ffd4cc1fb64 R9 =00007ffd4cc1fa20 R10=00007f2cad84da57 R11=0000000000000000 R12=0000000000000008 R13=00007ffd4cc1b4c0 R14=00007ffd4cc1fc90 R15=0000000000000452 RIP=ffffffff84601260 RFL=00000006 [-----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 00007f2caccfd900 00000000 00000000 GS =0000 0000000000000000 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=00007ffd4cc1d7bc CR3=000000000cb56000 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=00000000000000000000000000000000 XMM01=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=313d6563636120322e322e202e30313d XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000