syzkaller login: [ 48.124614] BUG: Bad rss-counter state mm:0000000048128d19 type:MM_FILEPAGES val:33 [ 48.125993] BUG: Bad rss-counter state mm:0000000048128d19 type:MM_ANONPAGES val:22 [ 48.279729] ================================================================== [ 48.280683] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 48.281619] Read of size 8 at addr ffff888016adb3f8 by task sshd/226 [ 48.282385] [ 48.282609] CPU: 1 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 48.283482] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 48.284482] Call Trace: [ 48.284807] [ 48.285088] dump_stack_lvl+0x91/0xf0 [ 48.285579] print_report+0xcc/0x620 [ 48.286063] ? __virt_addr_valid+0x102/0x340 [ 48.286614] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.287231] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.287843] kasan_report+0xbe/0xf0 [ 48.288319] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.288963] vma_interval_tree_remove+0xc75/0xec0 [ 48.289561] vma_prepare+0xc54/0x11a0 [ 48.290048] __split_vma+0x5af/0x950 [ 48.290518] ? __pfx___split_vma+0x10/0x10 [ 48.291046] ? find_held_lock+0x2c/0x110 [ 48.291574] do_vmi_align_munmap+0x2ba/0x11f0 [ 48.292141] ? lock_is_held_type+0x9f/0x120 [ 48.292682] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 48.293283] ? mtree_range_walk+0x632/0x900 [ 48.293840] ? mas_walk+0x5c7/0x7c0 [ 48.294317] do_vmi_munmap+0x1f1/0x2b0 [ 48.294804] mmap_region+0x1f9/0x2660 [ 48.295294] ? vm_mmap_pgoff+0x15c/0x3a0 [ 48.295814] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 48.296541] ? __pfx_lock_acquire+0x10/0x10 [ 48.297077] ? __pfx_mmap_region+0x10/0x10 [ 48.297620] ? security_mmap_addr+0x7d/0xa0 [ 48.298165] ? get_unmapped_area+0x1f5/0x3f0 [ 48.298708] do_mmap+0x854/0xf00 [ 48.299146] vm_mmap_pgoff+0x1a6/0x3a0 [ 48.299650] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 48.300209] ksys_mmap_pgoff+0x3af/0x500 [ 48.300728] do_syscall_64+0x3f/0x90 [ 48.301199] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.301844] RIP: 0033:0x7f87a6d3fd82 [ 48.302294] 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 [ 48.304440] RSP: 002b:00007ffcbeb39498 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 48.305343] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f87a6d3fd82 [ 48.306199] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f87a6179000 [ 48.307061] RBP: 00007f87a6179000 R08: 0000000000000009 R09: 0000000000001000 [ 48.307925] R10: 0000000000000812 R11: 0000000000000206 R12: 00005568fff9fec0 [ 48.308796] R13: 00007ffcbeb394b0 R14: 00007ffcbeb394e0 R15: 00007ffcbeb39840 [ 48.309649] [ 48.309943] [ 48.310160] Allocated by task 219: [ 48.310591] kasan_save_stack+0x22/0x50 [ 48.311103] kasan_set_track+0x25/0x30 [ 48.311597] __kasan_slab_alloc+0x59/0x70 [ 48.312126] kmem_cache_alloc+0x16b/0x370 [ 48.312659] vm_area_dup+0x20/0x160 [ 48.313111] __split_vma+0x170/0x950 [ 48.313578] split_vma+0xc6/0x110 [ 48.314019] mprotect_fixup+0x8d2/0xb30 [ 48.314529] do_mprotect_pkey+0x87e/0xd40 [ 48.315054] __x64_sys_mprotect+0x78/0xc0 [ 48.315574] do_syscall_64+0x3f/0x90 [ 48.316045] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.316702] [ 48.316915] Freed by task 219: [ 48.317309] kasan_save_stack+0x22/0x50 [ 48.317821] kasan_set_track+0x25/0x30 [ 48.318308] kasan_save_free_info+0x2b/0x50 [ 48.318841] __kasan_slab_free+0x10a/0x190 [ 48.319365] kmem_cache_free+0x10d/0x4d0 [ 48.319874] rcu_core+0x8c8/0x2860 [ 48.320313] __do_softirq+0x1b7/0x7d4 [ 48.320807] [ 48.321020] Last potentially related work creation: [ 48.321605] kasan_save_stack+0x22/0x50 [ 48.322113] __kasan_record_aux_stack+0x8e/0xa0 [ 48.322683] __call_rcu_common.constprop.0+0x6a/0xb90 [ 48.323323] remove_vma+0x139/0x170 [ 48.323770] do_vmi_align_munmap+0xd4a/0x11f0 [ 48.324322] do_vmi_munmap+0x1f1/0x2b0 [ 48.324819] __vm_munmap+0x138/0x3a0 [ 48.325286] __x64_sys_munmap+0x59/0x80 [ 48.325792] do_syscall_64+0x3f/0x90 [ 48.326270] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.326909] [ 48.327124] The buggy address belongs to the object at ffff888016adb3a0 [ 48.327124] which belongs to the cache vm_area_struct of size 168 [ 48.328603] The buggy address is located 88 bytes inside of [ 48.328603] freed 168-byte region [ffff888016adb3a0, ffff888016adb448) [ 48.330011] [ 48.330231] The buggy address belongs to the physical page: [ 48.330887] page:00000000a16d633a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16adb [ 48.331974] memcg:ffff8880143f7101 [ 48.332399] flags: 0x100000000000200(slab|node=0|zone=1) [ 48.333065] page_type: 0xffffffff() [ 48.333514] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 48.334427] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880143f7101 [ 48.335324] page dumped because: kasan: bad access detected [ 48.335993] [ 48.336208] Memory state around the buggy address: [ 48.336792] ffff888016adb280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 48.337641] ffff888016adb300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 48.338491] >ffff888016adb380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 48.339339] ^ [ 48.340187] ffff888016adb400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 48.341057] ffff888016adb480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 48.341911] ================================================================== [ 48.343070] Disabling lock debugging due to kernel taint [ 50.598892] BUG: Bad rss-counter state mm:00000000d3c26c36 type:MM_FILEPAGES val:33 [ 50.600527] BUG: Bad rss-counter state mm:00000000d3c26c36 type:MM_ANONPAGES val:22 [ 51.024236] BUG: Bad rss-counter state mm:0000000081fd17bf type:MM_FILEPAGES val:33 [ 51.025612] BUG: Bad rss-counter state mm:0000000081fd17bf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65472' (ECDSA) to the list of known hosts. 2023/06/20 06:54:40 fuzzer started 2023/06/20 06:54:40 dialing manager at localhost:44161 2023/06/20 06:54:40 checking machine... 2023/06/20 06:54:40 checking revisions... [ 51.774509] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:54:41 testing simple program... [ 51.830105] cgroup: Unknown subsys name 'net' [ 51.874773] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:54:31 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000020 RDX=00000000ffffffff RSI=0000000000000dc0 RDI=ffff888008441500 RBP=ffff888018defca0 RSP=ffff888018defc80 R8 =ffffffff81f05e04 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000020 R13=0000000000000dc0 R14=0000000000000001 R15=ffff888015bb3000 RIP=ffffffff8180ac93 RFL=00000256 [---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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f5eb09b4900 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=00007f5eb0f69650 CR3=000000000ea88000 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=2030343a34353a3630203032206e754a XMM01=657463656e6e6f63736944203a5d3533 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3533325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a34353a3630203032 XMM08=3d656e696c646d632022656369767265 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=0000000000000001 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=00007fe8ed126260 CR3=000000000d90e000 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=d0d44f37d8119689d14c06fbebfc5ecd XMM02=ec2efd57dc4c00df000000000011d150 XMM03=70a764edc150d29b000000000011d220 XMM04=ee974f3c675381e400000000000ae988 XMM05=6860aeb314f8829d0000000000133410 XMM06=13e856d8d71426c80000000000133298 XMM07=e042d86d42eb936e0000000000123de0 XMM08=70a764edc150d29b000000000011d220 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000