syzkaller login: [ 64.835261] BUG: Bad rss-counter state mm:00000000ea75b6f4 type:MM_FILEPAGES val:33 [ 64.836526] BUG: Bad rss-counter state mm:00000000ea75b6f4 type:MM_ANONPAGES val:22 [ 64.976775] ================================================================== [ 64.977514] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 64.978306] Read of size 8 at addr ffff88800fbb5880 by task sshd/220 [ 64.978923] [ 64.979101] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 64.979993] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 64.980922] Call Trace: [ 64.981201] [ 64.981441] dump_stack_lvl+0x91/0xf0 [ 64.981893] print_report+0xcc/0x620 [ 64.982286] ? __virt_addr_valid+0x102/0x340 [ 64.982748] ? vma_interval_tree_remove+0xc75/0xec0 [ 64.983248] ? vma_interval_tree_remove+0xc75/0xec0 [ 64.983742] kasan_report+0xbe/0xf0 [ 64.984130] ? vma_interval_tree_remove+0xc75/0xec0 [ 64.984628] vma_interval_tree_remove+0xc75/0xec0 [ 64.985115] vma_prepare+0xc54/0x11a0 [ 64.985523] __split_vma+0x5af/0x950 [ 64.985968] ? __pfx___split_vma+0x10/0x10 [ 64.986445] ? find_held_lock+0x2c/0x110 [ 64.986895] do_vmi_align_munmap+0x2ba/0x11f0 [ 64.987364] ? lock_is_held_type+0x9f/0x120 [ 64.987811] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 64.988306] ? mtree_range_walk+0x632/0x900 [ 64.988765] ? mas_walk+0x5c7/0x7c0 [ 64.989153] do_vmi_munmap+0x1f1/0x2b0 [ 64.989589] mmap_region+0x1f9/0x2660 [ 64.989994] ? vm_mmap_pgoff+0x15c/0x3a0 [ 64.990432] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 64.991027] ? __pfx_lock_acquire+0x10/0x10 [ 64.991481] ? __pfx_mmap_region+0x10/0x10 [ 64.991938] ? security_mmap_addr+0x7d/0xa0 [ 64.992514] ? get_unmapped_area+0x1f5/0x3f0 [ 64.993121] do_mmap+0x854/0xf00 [ 64.993581] vm_mmap_pgoff+0x1a6/0x3a0 [ 64.994080] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 64.994620] ksys_mmap_pgoff+0x3af/0x500 [ 64.995087] do_syscall_64+0x3f/0x90 [ 64.995508] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.996067] RIP: 0033:0x7f904af56d82 [ 64.996443] 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 [ 64.998191] RSP: 002b:00007ffca1348fa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 64.998929] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f904af56d82 [ 64.999658] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f904a390000 [ 65.000345] RBP: 00007f904a390000 R08: 0000000000000009 R09: 0000000000001000 [ 65.001039] R10: 0000000000000812 R11: 0000000000000206 R12: 00005581f8894ec0 [ 65.001843] R13: 00007ffca1348fc0 R14: 00007ffca1348ff0 R15: 00007ffca1349350 [ 65.002760] [ 65.003071] [ 65.003297] Allocated by task 213: [ 65.003746] kasan_save_stack+0x22/0x50 [ 65.004274] kasan_set_track+0x25/0x30 [ 65.004791] __kasan_slab_alloc+0x59/0x70 [ 65.005341] kmem_cache_alloc+0x16b/0x370 [ 65.005902] vm_area_dup+0x20/0x160 [ 65.006362] __split_vma+0x170/0x950 [ 65.006843] split_vma+0xc6/0x110 [ 65.007296] mprotect_fixup+0x8d2/0xb30 [ 65.007808] do_mprotect_pkey+0x87e/0xd40 [ 65.008345] __x64_sys_mprotect+0x78/0xc0 [ 65.008919] do_syscall_64+0x3f/0x90 [ 65.009449] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 65.010172] [ 65.010390] Freed by task 213: [ 65.010796] kasan_save_stack+0x22/0x50 [ 65.011320] kasan_set_track+0x25/0x30 [ 65.011832] kasan_save_free_info+0x2b/0x50 [ 65.012391] __kasan_slab_free+0x10a/0x190 [ 65.012949] kmem_cache_free+0x10d/0x4d0 [ 65.013467] rcu_core+0x8c8/0x2860 [ 65.013937] __do_softirq+0x1b7/0x7d4 [ 65.014432] [ 65.014654] Last potentially related work creation: [ 65.015248] kasan_save_stack+0x22/0x50 [ 65.015765] __kasan_record_aux_stack+0x8e/0xa0 [ 65.016361] __call_rcu_common.constprop.0+0x6a/0xb90 [ 65.017031] remove_vma+0x139/0x170 [ 65.017503] do_vmi_align_munmap+0xd4a/0x11f0 [ 65.018104] do_vmi_munmap+0x1f1/0x2b0 [ 65.018606] __vm_munmap+0x138/0x3a0 [ 65.019093] __x64_sys_munmap+0x59/0x80 [ 65.019595] do_syscall_64+0x3f/0x90 [ 65.020090] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 65.020744] [ 65.020949] The buggy address belongs to the object at ffff88800fbb5828 [ 65.020949] which belongs to the cache vm_area_struct of size 168 [ 65.022333] The buggy address is located 88 bytes inside of [ 65.022333] freed 168-byte region [ffff88800fbb5828, ffff88800fbb58d0) [ 65.023648] [ 65.023853] The buggy address belongs to the physical page: [ 65.024478] page:00000000096d1e27 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfbb5 [ 65.025501] memcg:ffff888019a2ba01 [ 65.025913] flags: 0x100000000000200(slab|node=0|zone=1) [ 65.026547] page_type: 0xffffffff() [ 65.026982] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 65.027841] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019a2ba01 [ 65.028710] page dumped because: kasan: bad access detected [ 65.029355] [ 65.029586] Memory state around the buggy address: [ 65.030171] ffff88800fbb5780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 65.031015] ffff88800fbb5800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 65.031858] >ffff88800fbb5880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 65.032725] ^ [ 65.033154] ffff88800fbb5900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 65.034022] ffff88800fbb5980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 65.034868] ================================================================== [ 65.035911] Disabling lock debugging due to kernel taint [ 66.954319] BUG: Bad rss-counter state mm:000000000e075be0 type:MM_FILEPAGES val:33 [ 66.955346] BUG: Bad rss-counter state mm:000000000e075be0 type:MM_ANONPAGES val:22 [ 67.395985] BUG: Bad rss-counter state mm:000000005a39af3a type:MM_FILEPAGES val:33 [ 67.397115] BUG: Bad rss-counter state mm:000000005a39af3a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26271' (ECDSA) to the list of known hosts. 2023/06/19 16:52:50 fuzzer started 2023/06/19 16:52:50 dialing manager at localhost:44161 2023/06/19 16:52:50 checking machine... 2023/06/19 16:52:50 checking revisions... [ 68.128544] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:52:50 testing simple program... [ 68.172213] cgroup: Unknown subsys name 'net' [ 68.220719] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:52:14 Registers: info registers vcpu 0 RAX=ffffffff86088c1f RBX=0000000000000001 RCX=ffffffff86088c1a RDX=0000000000000000 RSI=1ffffffff0c11183 RDI=ffffffff85d88408 RBP=ffff88801437f750 RSP=ffff88801437f638 R8 =ffffffff86088c1a R9 =ffff88801437f738 R10=0000000000038001 R11=0000000000003c0d R12=ffff88801437f758 R13=ffff88801437f740 R14=ffff88801437f739 R15=ffff88801437f6f8 RIP=ffffffff81130a5b RFL=00000213 [----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 00007f949fb91900 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=00007f949efec8c0 CR3=000000000d590000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=0c4679a38692c94700000000000ae988 XMM05=86afa05782a7bec9000000000013e148 XMM06=19e9129bd510f235000000000013cfe0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=ffff88800ed29b40 RCX=1ffffffff0ba7a02 RDX=0000000000000000 RSI=0000000000000008 RDI=0000000000000000 RBP=ffffffff83c5ecc4 RSP=ffff88801cddf550 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=000016cf000016cf R12=ffffffff83c5ecc4 R13=0000000000000000 R14=ffff88801cddf728 R15=ffff88800c461dc0 RIP=ffffffff812dc118 RFL=00000046 [---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 00007f2b3604f900 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=00007ffcbcc8a000 CR3=00000000159ca000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000