syzkaller login: [ 33.790736] BUG: Bad rss-counter state mm:00000000c86db3e8 type:MM_FILEPAGES val:33 [ 33.792132] BUG: Bad rss-counter state mm:00000000c86db3e8 type:MM_ANONPAGES val:22 [ 33.956263] ================================================================== [ 33.957195] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.958297] Read of size 8 at addr ffff88801a2873f8 by task sshd/221 [ 33.959100] [ 33.959318] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.960182] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.961171] Call Trace: [ 33.961497] [ 33.961785] dump_stack_lvl+0x91/0xf0 [ 33.962305] print_report+0xcc/0x620 [ 33.962798] ? __virt_addr_valid+0x102/0x340 [ 33.963355] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.963973] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.964597] kasan_report+0xbe/0xf0 [ 33.965078] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.965716] vma_interval_tree_remove+0xc75/0xec0 [ 33.966377] vma_prepare+0xc54/0x11a0 [ 33.966859] __split_vma+0x5af/0x950 [ 33.967341] ? __pfx___split_vma+0x10/0x10 [ 33.967881] ? find_held_lock+0x2c/0x110 [ 33.968411] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.968998] ? lock_is_held_type+0x9f/0x120 [ 33.969536] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.970178] ? mtree_range_walk+0x632/0x900 [ 33.970736] ? mas_walk+0x5c7/0x7c0 [ 33.971214] do_vmi_munmap+0x1f1/0x2b0 [ 33.971712] mmap_region+0x1f9/0x2660 [ 33.972198] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.972717] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.973431] ? __pfx_lock_acquire+0x10/0x10 [ 33.974016] ? __pfx_mmap_region+0x10/0x10 [ 33.974557] ? security_mmap_addr+0x7d/0xa0 [ 33.975098] ? get_unmapped_area+0x1f5/0x3f0 [ 33.975657] do_mmap+0x854/0xf00 [ 33.976103] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.976602] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.977176] ksys_mmap_pgoff+0x3af/0x500 [ 33.977690] do_syscall_64+0x3f/0x90 [ 33.978195] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.978843] RIP: 0033:0x7fcb0c5bad82 [ 33.979309] 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 [ 33.981455] RSP: 002b:00007ffe6c546688 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.982404] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcb0c5bad82 [ 33.983249] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcb0b9f4000 [ 33.984116] RBP: 00007fcb0b9f4000 R08: 0000000000000009 R09: 0000000000001000 [ 33.984976] R10: 0000000000000812 R11: 0000000000000206 R12: 00005567eaa5df60 [ 33.985841] R13: 00007ffe6c5466a0 R14: 00007ffe6c5466d0 R15: 00007ffe6c546a30 [ 33.986731] [ 33.987023] [ 33.987241] Allocated by task 214: [ 33.987671] kasan_save_stack+0x22/0x50 [ 33.988176] kasan_set_track+0x25/0x30 [ 33.988675] __kasan_slab_alloc+0x59/0x70 [ 33.989216] kmem_cache_alloc+0x16b/0x370 [ 33.989744] vm_area_dup+0x20/0x160 [ 33.990243] __split_vma+0x170/0x950 [ 33.990712] split_vma+0xc6/0x110 [ 33.991151] mprotect_fixup+0x8d2/0xb30 [ 33.991650] do_mprotect_pkey+0x87e/0xd40 [ 33.992171] __x64_sys_mprotect+0x78/0xc0 [ 33.992695] do_syscall_64+0x3f/0x90 [ 33.993177] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.993822] [ 33.994059] Freed by task 214: [ 33.994460] kasan_save_stack+0x22/0x50 [ 33.994961] kasan_set_track+0x25/0x30 [ 33.995467] kasan_save_free_info+0x2b/0x50 [ 33.995999] __kasan_slab_free+0x10a/0x190 [ 33.996538] kmem_cache_free+0x10d/0x4d0 [ 33.997043] rcu_core+0x8c8/0x2860 [ 33.997485] __do_softirq+0x1b7/0x7d4 [ 33.998001] [ 33.998223] Last potentially related work creation: [ 33.998812] kasan_save_stack+0x22/0x50 [ 33.999315] __kasan_record_aux_stack+0x8e/0xa0 [ 33.999892] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.000634] remove_vma+0x139/0x170 [ 34.001091] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.001660] do_vmi_munmap+0x1f1/0x2b0 [ 34.002171] __vm_munmap+0x138/0x3a0 [ 34.002653] __x64_sys_munmap+0x59/0x80 [ 34.003155] do_syscall_64+0x3f/0x90 [ 34.003626] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.004275] [ 34.004490] The buggy address belongs to the object at ffff88801a2873a0 [ 34.004490] which belongs to the cache vm_area_struct of size 168 [ 34.005994] The buggy address is located 88 bytes inside of [ 34.005994] freed 168-byte region [ffff88801a2873a0, ffff88801a287448) [ 34.007404] [ 34.007624] The buggy address belongs to the physical page: [ 34.008300] page:00000000ab58d7bb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a287 [ 34.009407] memcg:ffff888018151f01 [ 34.009858] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.010517] page_type: 0xffffffff() [ 34.010973] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.011906] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018151f01 [ 34.012816] page dumped because: kasan: bad access detected [ 34.013479] [ 34.013705] Memory state around the buggy address: [ 34.014323] ffff88801a287280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 34.015182] ffff88801a287300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 34.016045] >ffff88801a287380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 34.016910] ^ [ 34.017761] ffff88801a287400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 34.018651] ffff88801a287480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.019504] ================================================================== [ 34.020483] Disabling lock debugging due to kernel taint [ 35.883021] BUG: Bad rss-counter state mm:00000000cb456c3c type:MM_FILEPAGES val:33 [ 35.884544] BUG: Bad rss-counter state mm:00000000cb456c3c type:MM_ANONPAGES val:22 [ 36.422146] BUG: Bad rss-counter state mm:000000007d19ca53 type:MM_FILEPAGES val:33 [ 36.423153] BUG: Bad rss-counter state mm:000000007d19ca53 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22050' (ECDSA) to the list of known hosts. 2023/06/19 13:39:13 fuzzer started 2023/06/19 13:39:14 dialing manager at localhost:44161 2023/06/19 13:39:14 checking machine... 2023/06/19 13:39:14 checking revisions... [ 37.163273] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:39:14 testing simple program... [ 37.215047] cgroup: Unknown subsys name 'net' [ 37.252422] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:39:09 Registers: info registers vcpu 0 RAX=ffff88800cb9ff58 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff11001973f3d RSI=ffffffff846000aa RDI=ffff88800cb9f9a0 RBP=ffff88800cb9f9f8 RSP=ffff88800cb9f930 R8 =0000000000000001 R9 =ffff88800cb9f9e0 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff88800cb9fa68 R13=ffff88800cb9f9e8 R14=ffff888016ca51c0 R15=ffff88800cb9f9a0 RIP=ffffffff81130664 RFL=00000282 [--S----] 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 00007f4161376900 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=00007f416192b650 CR3=000000000e65c000 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=00000000000000000000000000000000 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=0000000000000001 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=00007f6854961080 CR3=0000000010282000 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=721d0cb5f130e28d0b4537a8ddc4340c XMM02=2c67c8bc2e329bc3000000000011d470 XMM03=fb795ef6d65770560000000000124178 XMM04=3612978bdde9f0ae00000000000ae988 XMM05=e4cb8bb95a7664b60000000000133d28 XMM06=57d2b7feecd9c4770000000000132b90 XMM07=e042d86d42eb936e00000000001243f8 XMM08=de5b8b40b37570d9000000000011d4d0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000