syzkaller login: [ 40.750443] BUG: Bad rss-counter state mm:000000009003d499 type:MM_FILEPAGES val:33 [ 40.751640] BUG: Bad rss-counter state mm:000000009003d499 type:MM_ANONPAGES val:22 [ 40.795865] ================================================================== [ 40.796857] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.797797] Read of size 8 at addr ffff8880102a2058 by task sshd/220 [ 40.798556] [ 40.798777] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.799631] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.800625] Call Trace: [ 40.800946] [ 40.801234] dump_stack_lvl+0x91/0xf0 [ 40.801722] print_report+0xcc/0x620 [ 40.802210] ? __virt_addr_valid+0x102/0x340 [ 40.802769] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.803387] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.804014] kasan_report+0xbe/0xf0 [ 40.804488] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.805111] vma_interval_tree_remove+0xc75/0xec0 [ 40.805716] vma_prepare+0xc54/0x11a0 [ 40.806206] __split_vma+0x5af/0x950 [ 40.806697] ? __pfx___split_vma+0x10/0x10 [ 40.807245] ? find_held_lock+0x2c/0x110 [ 40.807810] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.808395] ? lock_is_held_type+0x9f/0x120 [ 40.808957] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.809586] ? mtree_range_walk+0x632/0x900 [ 40.810159] ? mas_walk+0x5c7/0x7c0 [ 40.810650] do_vmi_munmap+0x1f1/0x2b0 [ 40.811157] mmap_region+0x1f9/0x2660 [ 40.811657] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.812206] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.812946] ? __pfx_lock_acquire+0x10/0x10 [ 40.813500] ? __pfx_mmap_region+0x10/0x10 [ 40.814051] ? security_mmap_addr+0x7d/0xa0 [ 40.814603] ? get_unmapped_area+0x1f5/0x3f0 [ 40.815173] do_mmap+0x854/0xf00 [ 40.815625] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.816157] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.816746] ksys_mmap_pgoff+0x3af/0x500 [ 40.817275] do_syscall_64+0x3f/0x90 [ 40.817771] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.818447] RIP: 0033:0x7fd8711e2d82 [ 40.818924] 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 [ 40.821137] RSP: 002b:00007ffcdc16b648 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.822081] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd8711e2d82 [ 40.822958] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd87061c000 [ 40.823849] RBP: 00007fd87061c000 R08: 0000000000000009 R09: 0000000000001000 [ 40.824730] R10: 0000000000000812 R11: 0000000000000206 R12: 00005557f94dcf70 [ 40.825619] R13: 00007ffcdc16b660 R14: 00007ffcdc16b690 R15: 00007ffcdc16b9f0 [ 40.826511] [ 40.826817] [ 40.827038] Allocated by task 213: [ 40.827482] kasan_save_stack+0x22/0x50 [ 40.828023] kasan_set_track+0x25/0x30 [ 40.828531] __kasan_slab_alloc+0x59/0x70 [ 40.829082] kmem_cache_alloc+0x16b/0x370 [ 40.829621] vm_area_dup+0x20/0x160 [ 40.830095] __split_vma+0x170/0x950 [ 40.830581] split_vma+0xc6/0x110 [ 40.831043] mprotect_fixup+0x8d2/0xb30 [ 40.831562] do_mprotect_pkey+0x87e/0xd40 [ 40.832111] __x64_sys_mprotect+0x78/0xc0 [ 40.832655] do_syscall_64+0x3f/0x90 [ 40.833153] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.833821] [ 40.834042] Freed by task 213: [ 40.834450] kasan_save_stack+0x22/0x50 [ 40.834975] kasan_set_track+0x25/0x30 [ 40.835485] kasan_save_free_info+0x2b/0x50 [ 40.836049] __kasan_slab_free+0x10a/0x190 [ 40.836607] kmem_cache_free+0x10d/0x4d0 [ 40.837139] rcu_core+0x8c8/0x2860 [ 40.837606] __do_softirq+0x1b7/0x7d4 [ 40.838103] [ 40.838325] Last potentially related work creation: [ 40.838934] kasan_save_stack+0x22/0x50 [ 40.839459] __kasan_record_aux_stack+0x8e/0xa0 [ 40.840073] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.840743] remove_vma+0x139/0x170 [ 40.841211] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.841791] do_vmi_munmap+0x1f1/0x2b0 [ 40.842295] __vm_munmap+0x138/0x3a0 [ 40.842779] __x64_sys_munmap+0x59/0x80 [ 40.843294] do_syscall_64+0x3f/0x90 [ 40.843801] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.844466] [ 40.844690] Second to last potentially related work creation: [ 40.845409] kasan_save_stack+0x22/0x50 [ 40.845934] __kasan_record_aux_stack+0x8e/0xa0 [ 40.846529] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.847202] remove_vma+0x139/0x170 [ 40.847666] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.848264] do_vmi_munmap+0x1f1/0x2b0 [ 40.848750] mmap_region+0x1f9/0x2660 [ 40.849248] do_mmap+0x854/0xf00 [ 40.849683] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.850172] ksys_mmap_pgoff+0x3af/0x500 [ 40.850673] do_syscall_64+0x3f/0x90 [ 40.851146] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.851796] [ 40.852011] The buggy address belongs to the object at ffff8880102a2000 [ 40.852011] which belongs to the cache vm_area_struct of size 168 [ 40.853494] The buggy address is located 88 bytes inside of [ 40.853494] freed 168-byte region [ffff8880102a2000, ffff8880102a20a8) [ 40.854989] [ 40.855206] The buggy address belongs to the physical page: [ 40.855882] page:00000000d3eee09e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102a2 [ 40.856977] memcg:ffff88800bf5b101 [ 40.857399] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.858036] page_type: 0xffffffff() [ 40.858494] raw: 0100000000000200 ffff88800879fc80 ffffea0000407c00 dead000000000004 [ 40.859409] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800bf5b101 [ 40.860329] page dumped because: kasan: bad access detected [ 40.861035] [ 40.861249] Memory state around the buggy address: [ 40.861816] ffff8880102a1f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 40.862627] ffff8880102a1f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 40.863471] >ffff8880102a2000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.864488] ^ [ 40.865257] ffff8880102a2080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 40.866063] ffff8880102a2100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.866862] ================================================================== [ 40.867880] Disabling lock debugging due to kernel taint [ 42.882718] BUG: Bad rss-counter state mm:00000000884a1a6d type:MM_FILEPAGES val:33 [ 42.883770] BUG: Bad rss-counter state mm:00000000884a1a6d type:MM_ANONPAGES val:22 [ 43.321252] BUG: Bad rss-counter state mm:00000000be790842 type:MM_FILEPAGES val:33 [ 43.321986] BUG: Bad rss-counter state mm:00000000be790842 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41978' (ECDSA) to the list of known hosts. 2023/06/19 21:59:24 fuzzer started 2023/06/19 21:59:24 dialing manager at localhost:44161 2023/06/19 21:59:24 checking machine... 2023/06/19 21:59:24 checking revisions... [ 43.902780] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:59:24 testing simple program... [ 43.958319] cgroup: Unknown subsys name 'net' [ 43.999204] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:59:22 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff88800e41d300 RCX=0000000000000000 RDX=ffffffff81ef13be RSI=ffff88800e41d300 RDI=ffff888000000000 RBP=ffff8880094dfdb0 RSP=ffff8880094dfd70 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff8880087b03c0 R13=ffff8880087b03c0 R14=ffffffff81ef13be R15=ffff88800e9bc680 RIP=ffffffff8180c7e5 RFL=00000246 [---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 00007fd12a942900 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=00007ffcf7b99000 CR3=000000000c590000 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=00ff0000000000000000000000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff1100206a51d RBX=ffff8880103528b8 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff8880103528e8 RBP=ffff88800c5b9398 RSP=ffff88806cf09dd8 R8 =0000000000000001 R9 =ffffed100d9e13af R10=0000000000000003 R11=0000000000000000 R12=dffffc0000000000 R13=ffff88800c5b9000 R14=ffffffff813782a8 R15=ffff88800c5b9000 RIP=ffffffff8184636c 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 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=00007f3aac0e4de0 CR3=000000000e764000 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=2564dc0db823cb8d2e435686f9b68c09 XMM02=ec2efd57dc4c00df000000000011d628 XMM03=4b3c821e6db8516b000000000011d6f8 XMM04=06061a7441436efc00000000000ae988 XMM05=19e9129bd510f2350000000000134c90 XMM06=4fda316b135da52b0000000000134b18 XMM07=e042d86d42eb936e0000000000124310 XMM08=4b3c821e6db8516b000000000011d6f8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000