syzkaller login: [ 30.189031] BUG: Bad rss-counter state mm:00000000970e845b type:MM_FILEPAGES val:33 [ 30.190041] BUG: Bad rss-counter state mm:00000000970e845b type:MM_ANONPAGES val:22 [ 30.355881] ================================================================== [ 30.356809] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.357752] Read of size 8 at addr ffff888016ac83f8 by task sshd/222 [ 30.358651] [ 30.358866] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.359730] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.360697] Call Trace: [ 30.361015] [ 30.361307] dump_stack_lvl+0x91/0xf0 [ 30.361799] print_report+0xcc/0x620 [ 30.362288] ? __virt_addr_valid+0x102/0x340 [ 30.362845] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.363459] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.364079] kasan_report+0xbe/0xf0 [ 30.364548] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.365180] vma_interval_tree_remove+0xc75/0xec0 [ 30.365778] vma_prepare+0xc54/0x11a0 [ 30.366252] __split_vma+0x5af/0x950 [ 30.366746] ? __pfx___split_vma+0x10/0x10 [ 30.367270] ? find_held_lock+0x2c/0x110 [ 30.367790] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.368359] ? lock_is_held_type+0x9f/0x120 [ 30.368894] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.369496] ? mtree_range_walk+0x632/0x900 [ 30.370047] ? mas_walk+0x5c7/0x7c0 [ 30.370535] do_vmi_munmap+0x1f1/0x2b0 [ 30.371023] mmap_region+0x1f9/0x2660 [ 30.371504] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.372009] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.372716] ? __pfx_lock_acquire+0x10/0x10 [ 30.373251] ? __pfx_mmap_region+0x10/0x10 [ 30.373777] ? security_mmap_addr+0x7d/0xa0 [ 30.374308] ? get_unmapped_area+0x1f5/0x3f0 [ 30.374863] do_mmap+0x854/0xf00 [ 30.375309] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.375800] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.376364] ksys_mmap_pgoff+0x3af/0x500 [ 30.376868] do_syscall_64+0x3f/0x90 [ 30.377343] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.377987] RIP: 0033:0x7f1aed61fd82 [ 30.378466] 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 [ 30.380570] RSP: 002b:00007fff58764878 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.381478] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1aed61fd82 [ 30.382331] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1aeca59000 [ 30.383189] RBP: 00007f1aeca59000 R08: 0000000000000009 R09: 0000000000001000 [ 30.384039] R10: 0000000000000812 R11: 0000000000000206 R12: 00005649a674ff70 [ 30.384893] R13: 00007fff58764890 R14: 00007fff587648c0 R15: 00007fff58764c20 [ 30.385747] [ 30.386038] [ 30.386252] Allocated by task 214: [ 30.386700] kasan_save_stack+0x22/0x50 [ 30.387199] kasan_set_track+0x25/0x30 [ 30.387691] __kasan_slab_alloc+0x59/0x70 [ 30.388222] kmem_cache_alloc+0x16b/0x370 [ 30.388751] vm_area_dup+0x20/0x160 [ 30.389206] __split_vma+0x170/0x950 [ 30.389670] split_vma+0xc6/0x110 [ 30.390112] mprotect_fixup+0x8d2/0xb30 [ 30.390626] do_mprotect_pkey+0x87e/0xd40 [ 30.391150] __x64_sys_mprotect+0x78/0xc0 [ 30.391666] do_syscall_64+0x3f/0x90 [ 30.392135] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.392774] [ 30.392993] Freed by task 204: [ 30.393384] kasan_save_stack+0x22/0x50 [ 30.393884] kasan_set_track+0x25/0x30 [ 30.394392] kasan_save_free_info+0x2b/0x50 [ 30.394925] __kasan_slab_free+0x10a/0x190 [ 30.395463] kmem_cache_free+0x10d/0x4d0 [ 30.395977] rcu_core+0x8c8/0x2860 [ 30.396423] __do_softirq+0x1b7/0x7d4 [ 30.396899] [ 30.397113] Last potentially related work creation: [ 30.397693] kasan_save_stack+0x22/0x50 [ 30.398191] __kasan_record_aux_stack+0x8e/0xa0 [ 30.398775] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.399418] remove_vma+0x139/0x170 [ 30.399867] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.400417] do_vmi_munmap+0x1f1/0x2b0 [ 30.400898] __vm_munmap+0x138/0x3a0 [ 30.401369] __x64_sys_munmap+0x59/0x80 [ 30.401859] do_syscall_64+0x3f/0x90 [ 30.402346] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.402991] [ 30.403206] The buggy address belongs to the object at ffff888016ac83a0 [ 30.403206] which belongs to the cache vm_area_struct of size 168 [ 30.404661] The buggy address is located 88 bytes inside of [ 30.404661] freed 168-byte region [ffff888016ac83a0, ffff888016ac8448) [ 30.406080] [ 30.406309] The buggy address belongs to the physical page: [ 30.406983] page:00000000a53cfd12 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16ac8 [ 30.408087] memcg:ffff888019ae8301 [ 30.408516] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.409160] page_type: 0xffffffff() [ 30.409613] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.410527] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019ae8301 [ 30.411440] page dumped because: kasan: bad access detected [ 30.412096] [ 30.412310] Memory state around the buggy address: [ 30.412884] ffff888016ac8280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.413732] ffff888016ac8300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.414596] >ffff888016ac8380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.415443] ^ [ 30.416290] ffff888016ac8400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.417133] ffff888016ac8480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.417983] ================================================================== [ 30.418954] Disabling lock debugging due to kernel taint [ 32.719972] BUG: Bad rss-counter state mm:00000000612cb647 type:MM_FILEPAGES val:33 [ 32.721155] BUG: Bad rss-counter state mm:00000000612cb647 type:MM_ANONPAGES val:22 [ 33.194044] BUG: Bad rss-counter state mm:00000000e8953c7c type:MM_FILEPAGES val:33 [ 33.195237] BUG: Bad rss-counter state mm:00000000e8953c7c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22944' (ECDSA) to the list of known hosts. 2023/06/21 10:31:43 fuzzer started 2023/06/21 10:31:43 dialing manager at localhost:36067 2023/06/21 10:31:43 checking machine... 2023/06/21 10:31:43 checking revisions... [ 33.826920] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:31:43 testing simple program... [ 33.878055] cgroup: Unknown subsys name 'net' [ 33.939247] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:31:42 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=00000000000000e6 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff856d84a0 RBP=ffffffff856d84a0 RSP=ffff88801a12fc48 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000246 R13=0000000000000000 R14=ffff8880093dce88 R15=ffff8880093dce40 RIP=ffffffff812e0024 RFL=00000086 [--S--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 00007f40a979a900 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=00007f40a9d4f650 CR3=000000000dc6e000 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=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=00007ffcb535fe48 CR3=000000000ee48000 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=2032343a31333a3031203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032343a31333a3031203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000