syzkaller login: [ 30.328180] BUG: Bad rss-counter state mm:0000000048b58bbb type:MM_FILEPAGES val:33 [ 30.329938] BUG: Bad rss-counter state mm:0000000048b58bbb type:MM_ANONPAGES val:22 [ 30.539574] ================================================================== [ 30.540657] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.541872] Read of size 8 at addr ffff88800e82aed8 by task sshd/220 [ 30.542766] [ 30.543027] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.544048] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.545188] Call Trace: [ 30.545569] [ 30.545903] dump_stack_lvl+0x91/0xf0 [ 30.546475] print_report+0xcc/0x620 [ 30.547039] ? __virt_addr_valid+0x102/0x340 [ 30.547687] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.548409] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.549105] kasan_report+0xbe/0xf0 [ 30.549684] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.550410] vma_interval_tree_remove+0xc75/0xec0 [ 30.551113] vma_prepare+0xc54/0x11a0 [ 30.551675] __split_vma+0x5af/0x950 [ 30.552230] ? __pfx___split_vma+0x10/0x10 [ 30.552848] ? find_held_lock+0x2c/0x110 [ 30.553493] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.554157] ? lock_is_held_type+0x9f/0x120 [ 30.554788] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.555496] ? mtree_range_walk+0x632/0x900 [ 30.556138] ? mas_walk+0x5c7/0x7c0 [ 30.556671] do_vmi_munmap+0x1f1/0x2b0 [ 30.557252] mmap_region+0x1f9/0x2660 [ 30.557821] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.558424] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.559255] ? __pfx_lock_acquire+0x10/0x10 [ 30.559865] ? __pfx_mmap_region+0x10/0x10 [ 30.560474] ? security_mmap_addr+0x7d/0xa0 [ 30.561094] ? get_unmapped_area+0x1f5/0x3f0 [ 30.561747] do_mmap+0x854/0xf00 [ 30.562265] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.562843] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.563502] ksys_mmap_pgoff+0x3af/0x500 [ 30.564094] do_syscall_64+0x3f/0x90 [ 30.564644] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.565390] RIP: 0033:0x7f32cdc80d82 [ 30.565941] 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 [ 30.568441] RSP: 002b:00007ffe24a57168 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.569493] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f32cdc80d82 [ 30.570478] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f32cd0ba000 [ 30.571462] RBP: 00007f32cd0ba000 R08: 0000000000000009 R09: 0000000000001000 [ 30.572445] R10: 0000000000000812 R11: 0000000000000206 R12: 000055706555dd90 [ 30.573426] R13: 00007ffe24a57180 R14: 00007ffe24a571b0 R15: 00007ffe24a57510 [ 30.574449] [ 30.574786] [ 30.575037] Allocated by task 211: [ 30.575539] kasan_save_stack+0x22/0x50 [ 30.576124] kasan_set_track+0x25/0x30 [ 30.576696] __kasan_slab_alloc+0x59/0x70 [ 30.577322] kmem_cache_alloc+0x16b/0x370 [ 30.577932] vm_area_dup+0x20/0x160 [ 30.578463] __split_vma+0x170/0x950 [ 30.579007] split_vma+0xc6/0x110 [ 30.579517] mprotect_fixup+0x8d2/0xb30 [ 30.580098] do_mprotect_pkey+0x87e/0xd40 [ 30.580702] __x64_sys_mprotect+0x78/0xc0 [ 30.581311] do_syscall_64+0x3f/0x90 [ 30.581873] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.582615] [ 30.582863] Freed by task 211: [ 30.583320] kasan_save_stack+0x22/0x50 [ 30.583905] kasan_set_track+0x25/0x30 [ 30.584482] kasan_save_free_info+0x2b/0x50 [ 30.585110] __kasan_slab_free+0x10a/0x190 [ 30.585740] kmem_cache_free+0x10d/0x4d0 [ 30.586328] rcu_core+0x8c8/0x2860 [ 30.586837] __do_softirq+0x1b7/0x7d4 [ 30.587401] [ 30.587649] Last potentially related work creation: [ 30.588329] kasan_save_stack+0x22/0x50 [ 30.588906] __kasan_record_aux_stack+0x8e/0xa0 [ 30.589574] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.590304] remove_vma+0x139/0x170 [ 30.590819] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.591462] do_vmi_munmap+0x1f1/0x2b0 [ 30.592013] __vm_munmap+0x138/0x3a0 [ 30.592545] __x64_sys_munmap+0x59/0x80 [ 30.593108] do_syscall_64+0x3f/0x90 [ 30.593675] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.594409] [ 30.594654] The buggy address belongs to the object at ffff88800e82ae80 [ 30.594654] which belongs to the cache vm_area_struct of size 168 [ 30.596344] The buggy address is located 88 bytes inside of [ 30.596344] freed 168-byte region [ffff88800e82ae80, ffff88800e82af28) [ 30.598201] [ 30.598473] The buggy address belongs to the physical page: [ 30.599314] page:00000000614e0e7c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe82a [ 30.600636] memcg:ffff88800d844001 [ 30.601144] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.602014] page_type: 0xffffffff() [ 30.602568] raw: 0100000000000200 ffff88800879fc80 ffffea0000389700 dead000000000002 [ 30.603658] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d844001 [ 30.604736] page dumped because: kasan: bad access detected [ 30.605546] [ 30.605800] Memory state around the buggy address: [ 30.606488] ffff88800e82ad80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.607536] ffff88800e82ae00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.608629] >ffff88800e82ae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.609715] ^ [ 30.610649] ffff88800e82af00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.611733] ffff88800e82af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.612859] ================================================================== [ 30.614201] Disabling lock debugging due to kernel taint [ 32.502209] BUG: Bad rss-counter state mm:00000000e556b3ca type:MM_FILEPAGES val:33 [ 32.503488] BUG: Bad rss-counter state mm:00000000e556b3ca type:MM_ANONPAGES val:22 [ 33.030413] BUG: Bad rss-counter state mm:000000004098dcab type:MM_FILEPAGES val:33 [ 33.031451] BUG: Bad rss-counter state mm:000000004098dcab type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25542' (ECDSA) to the list of known hosts. 2023/06/19 21:26:36 fuzzer started 2023/06/19 21:26:36 dialing manager at localhost:44161 2023/06/19 21:26:36 checking machine... 2023/06/19 21:26:36 checking revisions... [ 33.757796] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:26:37 testing simple program... [ 33.806640] cgroup: Unknown subsys name 'net' [ 33.863961] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:26:34 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff8542a6c0 RCX=ffff88806ce09ab8 RDX=ffff88806ce09a98 RSI=ffffffff8542a6c0 RDI=ffffffff85407d60 RBP=ffff88806ce09a98 RSP=ffff88806ce099b0 R8 =ffffffff864b115c R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b523e R12=ffffffff85407d60 R13=ffff88806ce02000 R14=ffffffff85407d68 R15=ffff88806ce09a98 RIP=ffffffff8450808e RFL=00000286 [--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 0000000000000000 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=00007ffe3091b838 CR3=0000000005482000 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=00007febc5d665100000559c0eb48790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888015f6d1c0 RSI=ffffffff81668e1c RDI=ffffea0000766340 RBP=ffffea0000766340 RSP=ffff888018cc7d18 R8 =0000000000000007 R9 =0000000000002000 R10=0000000000000000 R11=0000000000000000 R12=ffff88800e2cb658 R13=ffff88800845d340 R14=ffff88800845d830 R15=800000001d98d067 RIP=ffffffff816647d4 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f26a5f62900 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=00007ffd566c8d7c CR3=000000001b808000 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=6f24c6fec25a3d189861db334cf939e1 XMM05=00000000000000000000000000000000 XMM06=6f246563635a3d18736172204c73393d XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000