syzkaller login: [ 61.707639] BUG: Bad rss-counter state mm:0000000066002d16 type:MM_FILEPAGES val:33 [ 61.708626] BUG: Bad rss-counter state mm:0000000066002d16 type:MM_ANONPAGES val:22 [ 61.754954] ================================================================== [ 61.756096] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.757298] Read of size 8 at addr ffff88800ee3fb38 by task sshd/221 [ 61.758336] [ 61.758627] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.759663] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.760689] Call Trace: [ 61.761018] [ 61.761330] dump_stack_lvl+0x91/0xf0 [ 61.761892] print_report+0xcc/0x620 [ 61.762400] ? __virt_addr_valid+0x102/0x340 [ 61.762982] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.763639] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.764491] kasan_report+0xbe/0xf0 [ 61.765170] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.765976] vma_interval_tree_remove+0xc75/0xec0 [ 61.766609] vma_prepare+0xc54/0x11a0 [ 61.767102] __split_vma+0x5af/0x950 [ 61.767605] ? __pfx___split_vma+0x10/0x10 [ 61.768151] ? find_held_lock+0x2c/0x110 [ 61.768698] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.769287] ? lock_is_held_type+0x9f/0x120 [ 61.769859] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.770492] ? mtree_range_walk+0x632/0x900 [ 61.771069] ? mas_walk+0x5c7/0x7c0 [ 61.771567] do_vmi_munmap+0x1f1/0x2b0 [ 61.772085] mmap_region+0x1f9/0x2660 [ 61.772583] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.773113] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.773874] ? __pfx_lock_acquire+0x10/0x10 [ 61.774419] ? __pfx_mmap_region+0x10/0x10 [ 61.774976] ? security_mmap_addr+0x7d/0xa0 [ 61.775527] ? get_unmapped_area+0x1f5/0x3f0 [ 61.776092] do_mmap+0x854/0xf00 [ 61.776551] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.777073] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.777666] ksys_mmap_pgoff+0x3af/0x500 [ 61.778201] do_syscall_64+0x3f/0x90 [ 61.778703] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.779372] RIP: 0033:0x7fab1c3ddd82 [ 61.779848] 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 [ 61.782071] RSP: 002b:00007fff240bc588 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.783007] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fab1c3ddd82 [ 61.783891] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fab1b817000 [ 61.784764] RBP: 00007fab1b817000 R08: 0000000000000009 R09: 0000000000001000 [ 61.785649] R10: 0000000000000812 R11: 0000000000000206 R12: 00005597a783bec0 [ 61.786540] R13: 00007fff240bc5a0 R14: 00007fff240bc5d0 R15: 00007fff240bc930 [ 61.787463] [ 61.787768] [ 61.787992] Allocated by task 214: [ 61.788430] kasan_save_stack+0x22/0x50 [ 61.788956] kasan_set_track+0x25/0x30 [ 61.789466] __kasan_slab_alloc+0x59/0x70 [ 61.790013] kmem_cache_alloc+0x16b/0x370 [ 61.790543] vm_area_dup+0x20/0x160 [ 61.791014] __split_vma+0x170/0x950 [ 61.791489] split_vma+0xc6/0x110 [ 61.791944] mprotect_fixup+0x8d2/0xb30 [ 61.792462] do_mprotect_pkey+0x87e/0xd40 [ 61.792997] __x64_sys_mprotect+0x78/0xc0 [ 61.793529] do_syscall_64+0x3f/0x90 [ 61.794038] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.794694] [ 61.794913] Freed by task 214: [ 61.795315] kasan_save_stack+0x22/0x50 [ 61.795828] kasan_set_track+0x25/0x30 [ 61.796335] kasan_save_free_info+0x2b/0x50 [ 61.796879] __kasan_slab_free+0x10a/0x190 [ 61.797432] kmem_cache_free+0x10d/0x4d0 [ 61.797967] rcu_core+0x8c8/0x2860 [ 61.798423] __do_softirq+0x1b7/0x7d4 [ 61.798921] [ 61.799139] Last potentially related work creation: [ 61.799742] kasan_save_stack+0x22/0x50 [ 61.800262] __kasan_record_aux_stack+0x8e/0xa0 [ 61.800850] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.801510] remove_vma+0x139/0x170 [ 61.801980] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.802550] do_vmi_munmap+0x1f1/0x2b0 [ 61.803050] __vm_munmap+0x138/0x3a0 [ 61.803528] __x64_sys_munmap+0x59/0x80 [ 61.804045] do_syscall_64+0x3f/0x90 [ 61.804534] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.805205] [ 61.805423] The buggy address belongs to the object at ffff88800ee3fae0 [ 61.805423] which belongs to the cache vm_area_struct of size 168 [ 61.806942] The buggy address is located 88 bytes inside of [ 61.806942] freed 168-byte region [ffff88800ee3fae0, ffff88800ee3fb88) [ 61.808354] [ 61.808574] The buggy address belongs to the physical page: [ 61.809243] page:000000009a501d22 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee3f [ 61.810365] memcg:ffff888010048501 [ 61.810802] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.811464] page_type: 0xffffffff() [ 61.811925] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 61.812864] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888010048501 [ 61.813796] page dumped because: kasan: bad access detected [ 61.814504] [ 61.814732] Memory state around the buggy address: [ 61.815333] ffff88800ee3fa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 61.816210] ffff88800ee3fa80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 61.817087] >ffff88800ee3fb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.817968] ^ [ 61.818592] ffff88800ee3fb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 61.819475] ffff88800ee3fc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 61.820346] ================================================================== [ 61.821603] Disabling lock debugging due to kernel taint [ 63.834483] BUG: Bad rss-counter state mm:000000001049fd3b type:MM_FILEPAGES val:33 [ 63.835855] BUG: Bad rss-counter state mm:000000001049fd3b type:MM_ANONPAGES val:22 [ 64.241567] BUG: Bad rss-counter state mm:000000005959fb6a type:MM_FILEPAGES val:33 [ 64.242176] BUG: Bad rss-counter state mm:000000005959fb6a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51568' (ECDSA) to the list of known hosts. 2023/06/20 14:11:03 fuzzer started 2023/06/20 14:11:03 dialing manager at localhost:36067 2023/06/20 14:11:03 checking machine... 2023/06/20 14:11:03 checking revisions... [ 64.927818] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:11:03 testing simple program... [ 64.976493] cgroup: Unknown subsys name 'net' [ 65.014104] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:11:02 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=ffffffff8207b52a RDX=0000000000000000 RSI=0000000000000006 RDI=0000000000000005 RBP=0000000000000004 RSP=ffff888019d5fd50 R8 =0000000000000005 R9 =0000000000000006 R10=0000000000000000 R11=0000000000000000 R12=00000000ffffffff R13=000055f15e51f490 R14=ffff888019d5fec8 R15=0000000000000001 RIP=ffffffff814c0250 RFL=00000293 [--S-A-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 00007fce3ac15900 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=00007fff6bf12000 CR3=00000000163f0000 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=6c697473206e61632073726573552023 XMM01=20656c706f657020726568746f20776f XMM02=0000000000000000000000000000ffff XMM03=796e6120776f6c6c6120746f6e206f74 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff0000ffffffff00ffffffffffffffff XMM08=6120776f6c6c6120746f6e206f740000 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f8f6725eec0 CR3=000000000d7dc000 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=82e7f90822c7739d364bdae59fddbc5d XMM02=000000000011d9e0ec2efd57dc4c00df XMM03=0000000000122180b5cb052ecf1424f7 XMM04=e8403381716757d900000000000ae988 XMM05=e4cb8bb95a7664b60000000000131ff0 XMM06=70f226ddfbcb43450000000000130e58 XMM07=e042d86d42eb936e0000000000122400 XMM08=b5cb052ecf1424f7000000000011da40 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000