syzkaller login: [ 31.327534] BUG: Bad rss-counter state mm:00000000ac262be4 type:MM_FILEPAGES val:33 [ 31.328271] BUG: Bad rss-counter state mm:00000000ac262be4 type:MM_ANONPAGES val:22 [ 31.519579] ================================================================== [ 31.520189] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.520796] Read of size 8 at addr ffff88800e10e3f8 by task sshd/222 [ 31.521287] [ 31.521429] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.521981] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.522613] Call Trace: [ 31.522847] [ 31.523030] dump_stack_lvl+0x91/0xf0 [ 31.523353] print_report+0xcc/0x620 [ 31.523673] ? __virt_addr_valid+0x102/0x340 [ 31.524219] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.524651] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.525052] kasan_report+0xbe/0xf0 [ 31.525360] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.525762] vma_interval_tree_remove+0xc75/0xec0 [ 31.526151] vma_prepare+0xc54/0x11a0 [ 31.526465] __split_vma+0x5af/0x950 [ 31.526805] ? __pfx___split_vma+0x10/0x10 [ 31.527144] ? find_held_lock+0x2c/0x110 [ 31.527486] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.527856] ? lock_is_held_type+0x9f/0x120 [ 31.528212] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.528602] ? mtree_range_walk+0x632/0x900 [ 31.528967] ? mas_walk+0x5c7/0x7c0 [ 31.529277] do_vmi_munmap+0x1f1/0x2b0 [ 31.529626] mmap_region+0x1f9/0x2660 [ 31.529935] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.530266] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.530791] ? __pfx_lock_acquire+0x10/0x10 [ 31.531138] ? __pfx_mmap_region+0x10/0x10 [ 31.531480] ? security_mmap_addr+0x7d/0xa0 [ 31.531826] ? get_unmapped_area+0x1f5/0x3f0 [ 31.532184] do_mmap+0x854/0xf00 [ 31.532469] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.532793] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.533152] ksys_mmap_pgoff+0x3af/0x500 [ 31.533480] do_syscall_64+0x3f/0x90 [ 31.533800] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.534223] RIP: 0033:0x7f0d3c346d82 [ 31.534519] 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 [ 31.535916] RSP: 002b:00007ffc4d395d98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.536499] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0d3c346d82 [ 31.537040] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0d3b780000 [ 31.537585] RBP: 00007f0d3b780000 R08: 0000000000000009 R09: 0000000000001000 [ 31.538125] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b214b5cec0 [ 31.538728] R13: 00007ffc4d395db0 R14: 00007ffc4d395de0 R15: 00007ffc4d396140 [ 31.539279] [ 31.539469] [ 31.539613] Allocated by task 213: [ 31.539888] kasan_save_stack+0x22/0x50 [ 31.540217] kasan_set_track+0x25/0x30 [ 31.540540] __kasan_slab_alloc+0x59/0x70 [ 31.540877] kmem_cache_alloc+0x16b/0x370 [ 31.541210] vm_area_dup+0x20/0x160 [ 31.541503] __split_vma+0x170/0x950 [ 31.541811] split_vma+0xc6/0x110 [ 31.542098] mprotect_fixup+0x8d2/0xb30 [ 31.542421] do_mprotect_pkey+0x87e/0xd40 [ 31.542786] __x64_sys_mprotect+0x78/0xc0 [ 31.543120] do_syscall_64+0x3f/0x90 [ 31.543428] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.543851] [ 31.543990] Freed by task 210: [ 31.544246] kasan_save_stack+0x22/0x50 [ 31.544570] kasan_set_track+0x25/0x30 [ 31.544889] kasan_save_free_info+0x2b/0x50 [ 31.545237] __kasan_slab_free+0x10a/0x190 [ 31.545583] kmem_cache_free+0x10d/0x4d0 [ 31.545912] rcu_core+0x8c8/0x2860 [ 31.546199] __do_softirq+0x1b7/0x7d4 [ 31.546511] [ 31.546689] Last potentially related work creation: [ 31.547065] kasan_save_stack+0x22/0x50 [ 31.547394] __kasan_record_aux_stack+0x8e/0xa0 [ 31.547764] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.548178] remove_vma+0x139/0x170 [ 31.548468] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.548835] do_vmi_munmap+0x1f1/0x2b0 [ 31.549149] __vm_munmap+0x138/0x3a0 [ 31.549450] __x64_sys_munmap+0x59/0x80 [ 31.549776] do_syscall_64+0x3f/0x90 [ 31.550083] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.550499] [ 31.550750] Second to last potentially related work creation: [ 31.551186] kasan_save_stack+0x22/0x50 [ 31.551509] __kasan_record_aux_stack+0x8e/0xa0 [ 31.551887] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.552301] remove_vma+0x139/0x170 [ 31.552593] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.552955] do_vmi_munmap+0x1f1/0x2b0 [ 31.553268] mmap_region+0x1f9/0x2660 [ 31.553582] do_mmap+0x854/0xf00 [ 31.553859] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.554175] ksys_mmap_pgoff+0x3af/0x500 [ 31.554498] do_syscall_64+0x3f/0x90 [ 31.554823] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.555246] [ 31.555386] The buggy address belongs to the object at ffff88800e10e3a0 [ 31.555386] which belongs to the cache vm_area_struct of size 168 [ 31.556321] The buggy address is located 88 bytes inside of [ 31.556321] freed 168-byte region [ffff88800e10e3a0, ffff88800e10e448) [ 31.557217] [ 31.557360] The buggy address belongs to the physical page: [ 31.557788] page:00000000beca9c07 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe10e [ 31.558482] memcg:ffff88800ca29501 [ 31.558785] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.559200] page_type: 0xffffffff() [ 31.559489] raw: 0100000000000200 ffff8880087a0c80 ffffea0000326f80 dead000000000002 [ 31.560085] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ca29501 [ 31.560666] page dumped because: kasan: bad access detected [ 31.561091] [ 31.561233] Memory state around the buggy address: [ 31.561608] ffff88800e10e280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.562152] ffff88800e10e300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.562728] >ffff88800e10e380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.563273] ^ [ 31.563813] ffff88800e10e400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.564362] ffff88800e10e480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.564906] ================================================================== [ 31.565547] Disabling lock debugging due to kernel taint [ 34.207179] BUG: Bad rss-counter state mm:00000000c01dd54d type:MM_FILEPAGES val:33 [ 34.207807] BUG: Bad rss-counter state mm:00000000c01dd54d type:MM_ANONPAGES val:22 [ 34.924816] BUG: Bad rss-counter state mm:0000000062af7861 type:MM_FILEPAGES val:33 [ 34.931125] BUG: Bad rss-counter state mm:0000000062af7861 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14758' (ECDSA) to the list of known hosts. 2023/06/21 09:58:12 fuzzer started 2023/06/21 09:58:12 dialing manager at localhost:36067 2023/06/21 09:58:12 checking machine... 2023/06/21 09:58:12 checking revisions... [ 35.836392] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:58:13 testing simple program... [ 35.892260] cgroup: Unknown subsys name 'net' [ 35.974892] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:58:12 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000046 [---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 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=00007f281174f5a0 CR3=000000000976e000 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=c59ed55d08ddf1a5e04de17e25d5c341 XMM02=ec2efd57dc4c00df000000000011d2c8 XMM03=fe41fa59c746e4e0000000000011d398 XMM04=4e5ee8d6fdacc1fe00000000000ae988 XMM05=78ca09f4ba6ef6010000000000133a88 XMM06=4fda316b135da52b0000000000132b90 XMM07=e042d86d42eb936e0000000000121cb8 XMM08=fe41fa59c746e4e0000000000011d398 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=1ffff11001f80f56 RCX=000000000000000c RDX=00007fffe8d59000 RSI=ffff88806cf38c64 RDI=00007fffe8d50000 RBP=ffffed100d9e718c RSP=ffff88800fc07ab0 R8 =ffff88806cf38c58 R9 =ffffed1002007564 R10=ffff88801003ab27 R11=0000000000000000 R12=00007fffe8d59000 R13=ffffed100d9e718a R14=ffff88806cf38c64 R15=0000000000000001 RIP=ffffffff81145d1c 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f815db1d900 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=00007fffe8d59198 CR3=0000000016d78000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000