syzkaller login: [ 65.296234] BUG: Bad rss-counter state mm:0000000033f85fd2 type:MM_FILEPAGES val:33 [ 65.296882] BUG: Bad rss-counter state mm:0000000033f85fd2 type:MM_ANONPAGES val:22 [ 65.469953] ================================================================== [ 65.470840] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 65.471921] Read of size 8 at addr ffff88801b0515c8 by task sshd/227 [ 65.472691] [ 65.472917] CPU: 1 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 65.473812] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 65.474867] Call Trace: [ 65.475196] [ 65.475495] dump_stack_lvl+0x91/0xf0 [ 65.476004] print_report+0xcc/0x620 [ 65.476496] ? __virt_addr_valid+0x102/0x340 [ 65.477115] ? vma_interval_tree_remove+0xc75/0xec0 [ 65.477784] ? vma_interval_tree_remove+0xc75/0xec0 [ 65.478423] kasan_report+0xbe/0xf0 [ 65.478925] ? vma_interval_tree_remove+0xc75/0xec0 [ 65.479591] vma_interval_tree_remove+0xc75/0xec0 [ 65.480245] vma_prepare+0xc54/0x11a0 [ 65.480747] __split_vma+0x5af/0x950 [ 65.481268] ? __pfx___split_vma+0x10/0x10 [ 65.481819] ? find_held_lock+0x2c/0x110 [ 65.482396] do_vmi_align_munmap+0x2ba/0x11f0 [ 65.483001] ? lock_is_held_type+0x9f/0x120 [ 65.483560] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 65.484177] ? mtree_range_walk+0x632/0x900 [ 65.484749] ? mas_walk+0x5c7/0x7c0 [ 65.485240] do_vmi_munmap+0x1f1/0x2b0 [ 65.485742] mmap_region+0x1f9/0x2660 [ 65.486239] ? vm_mmap_pgoff+0x15c/0x3a0 [ 65.486753] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 65.487482] ? __pfx_lock_acquire+0x10/0x10 [ 65.488032] ? __pfx_mmap_region+0x10/0x10 [ 65.488565] ? security_mmap_addr+0x7d/0xa0 [ 65.489143] ? get_unmapped_area+0x1f5/0x3f0 [ 65.489701] do_mmap+0x854/0xf00 [ 65.490155] vm_mmap_pgoff+0x1a6/0x3a0 [ 65.490642] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 65.491220] ksys_mmap_pgoff+0x3af/0x500 [ 65.491728] do_syscall_64+0x3f/0x90 [ 65.492209] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 65.492843] RIP: 0033:0x7f3aaf7b7d82 [ 65.493357] 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 [ 65.495579] RSP: 002b:00007ffd0f0b8388 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 65.496514] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3aaf7b7d82 [ 65.497433] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3aaebf1000 [ 65.498329] RBP: 00007f3aaebf1000 R08: 0000000000000009 R09: 0000000000001000 [ 65.499225] R10: 0000000000000812 R11: 0000000000000206 R12: 000055abb038ab20 [ 65.500104] R13: 00007ffd0f0b83a0 R14: 00007ffd0f0b83d0 R15: 00007ffd0f0b8730 [ 65.500998] [ 65.501298] [ 65.501520] Allocated by task 220: [ 65.501965] kasan_save_stack+0x22/0x50 [ 65.502502] kasan_set_track+0x25/0x30 [ 65.503041] __kasan_slab_alloc+0x59/0x70 [ 65.503605] kmem_cache_alloc+0x16b/0x370 [ 65.504157] vm_area_dup+0x20/0x160 [ 65.504647] __split_vma+0x170/0x950 [ 65.505154] split_vma+0xc6/0x110 [ 65.505618] mprotect_fixup+0x8d2/0xb30 [ 65.506166] do_mprotect_pkey+0x87e/0xd40 [ 65.506713] __x64_sys_mprotect+0x78/0xc0 [ 65.507270] do_syscall_64+0x3f/0x90 [ 65.507765] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 65.508457] [ 65.508675] Freed by task 220: [ 65.509089] kasan_save_stack+0x22/0x50 [ 65.509596] kasan_set_track+0x25/0x30 [ 65.510129] kasan_save_free_info+0x2b/0x50 [ 65.510712] __kasan_slab_free+0x10a/0x190 [ 65.511273] kmem_cache_free+0x10d/0x4d0 [ 65.511808] rcu_core+0x8c8/0x2860 [ 65.512290] __do_softirq+0x1b7/0x7d4 [ 65.512904] [ 65.513144] Last potentially related work creation: [ 65.513760] kasan_save_stack+0x22/0x50 [ 65.514267] __kasan_record_aux_stack+0x8e/0xa0 [ 65.514872] __call_rcu_common.constprop.0+0x6a/0xb90 [ 65.515568] remove_vma+0x139/0x170 [ 65.516022] do_vmi_align_munmap+0xd4a/0x11f0 [ 65.516601] do_vmi_munmap+0x1f1/0x2b0 [ 65.517145] __vm_munmap+0x138/0x3a0 [ 65.517662] __x64_sys_munmap+0x59/0x80 [ 65.518156] do_syscall_64+0x3f/0x90 [ 65.518640] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 65.519282] [ 65.519493] The buggy address belongs to the object at ffff88801b051570 [ 65.519493] which belongs to the cache vm_area_struct of size 168 [ 65.521057] The buggy address is located 88 bytes inside of [ 65.521057] freed 168-byte region [ffff88801b051570, ffff88801b051618) [ 65.522520] [ 65.522742] The buggy address belongs to the physical page: [ 65.523441] page:000000008cf52cfa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1b051 [ 65.524591] memcg:ffff888013b52201 [ 65.525051] flags: 0x100000000000200(slab|node=0|zone=1) [ 65.525733] page_type: 0xffffffff() [ 65.526228] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 65.527142] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013b52201 [ 65.528111] page dumped because: kasan: bad access detected [ 65.528834] [ 65.529074] Memory state around the buggy address: [ 65.529689] ffff88801b051480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 65.530621] ffff88801b051500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 65.531524] >ffff88801b051580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 65.532425] ^ [ 65.533124] ffff88801b051600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 65.534016] ffff88801b051680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 65.534869] ================================================================== [ 65.535912] Disabling lock debugging due to kernel taint [ 67.544021] BUG: Bad rss-counter state mm:0000000009bdda5f type:MM_FILEPAGES val:33 [ 67.545182] BUG: Bad rss-counter state mm:0000000009bdda5f type:MM_ANONPAGES val:22 [ 67.997058] BUG: Bad rss-counter state mm:00000000ea29cdbc type:MM_FILEPAGES val:33 [ 67.998655] BUG: Bad rss-counter state mm:00000000ea29cdbc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12014' (ECDSA) to the list of known hosts. 2023/06/19 18:41:18 fuzzer started 2023/06/19 18:41:19 dialing manager at localhost:44161 2023/06/19 18:41:19 checking machine... 2023/06/19 18:41:19 checking revisions... [ 68.744209] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:41:19 testing simple program... [ 68.786307] cgroup: Unknown subsys name 'net' [ 68.842375] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:41:14 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff8153425b RDX=ffff88800e65b680 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff8171b253 RSP=ffff88800ca57e58 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000000 R13=00007f86c536f3ec R14=0000000000000200 R15=0000000000000040 RIP=ffffffff8180fd28 RFL=00000056 [---ZAP-] 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 00007f86c4bfd900 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=00007f86c536f3ec CR3=000000000fe3a000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 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=ffff888008c58400 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=00007fbfd6aab460 CR3=000000000e6d6000 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=2038313a31343a3831203931206e754a XMM01=73732878696e755f6d6170203a5d3633 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3633325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038313a31343a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000