syzkaller login: [ 44.494211] BUG: Bad rss-counter state mm:00000000389c4d94 type:MM_FILEPAGES val:33 [ 44.495356] BUG: Bad rss-counter state mm:00000000389c4d94 type:MM_ANONPAGES val:22 [ 44.681895] ================================================================== [ 44.682878] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.683886] Read of size 8 at addr ffff888010094c20 by task sshd/227 [ 44.684857] [ 44.685094] CPU: 0 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.686020] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.687105] Call Trace: [ 44.687448] [ 44.687756] dump_stack_lvl+0x91/0xf0 [ 44.688283] print_report+0xcc/0x620 [ 44.688807] ? __virt_addr_valid+0x102/0x340 [ 44.689390] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.690049] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.690719] kasan_report+0xbe/0xf0 [ 44.691228] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.691897] vma_interval_tree_remove+0xc75/0xec0 [ 44.692546] vma_prepare+0xc54/0x11a0 [ 44.693063] __split_vma+0x5af/0x950 [ 44.693570] ? __pfx___split_vma+0x10/0x10 [ 44.694139] ? find_held_lock+0x2c/0x110 [ 44.694718] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.695322] ? lock_is_held_type+0x9f/0x120 [ 44.695898] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.696550] ? mtree_range_walk+0x632/0x900 [ 44.697140] ? mas_walk+0x5c7/0x7c0 [ 44.697656] do_vmi_munmap+0x1f1/0x2b0 [ 44.698189] mmap_region+0x1f9/0x2660 [ 44.698726] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.699278] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.700054] ? __pfx_lock_acquire+0x10/0x10 [ 44.700630] ? __pfx_mmap_region+0x10/0x10 [ 44.701211] ? security_mmap_addr+0x7d/0xa0 [ 44.701781] ? get_unmapped_area+0x1f5/0x3f0 [ 44.702398] do_mmap+0x854/0xf00 [ 44.702878] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.703415] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.704029] ksys_mmap_pgoff+0x3af/0x500 [ 44.704580] do_syscall_64+0x3f/0x90 [ 44.705100] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.705811] RIP: 0033:0x7f8e94e9bd82 [ 44.706309] 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 [ 44.708620] RSP: 002b:00007ffec3a85338 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.709599] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8e94e9bd82 [ 44.710623] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8e942d5000 [ 44.711560] RBP: 00007f8e942d5000 R08: 0000000000000009 R09: 0000000000001000 [ 44.712495] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563779245ec0 [ 44.713421] R13: 00007ffec3a85350 R14: 00007ffec3a85380 R15: 00007ffec3a856e0 [ 44.714394] [ 44.714718] [ 44.714959] Allocated by task 220: [ 44.715434] kasan_save_stack+0x22/0x50 [ 44.715999] kasan_set_track+0x25/0x30 [ 44.716548] __kasan_slab_alloc+0x59/0x70 [ 44.717138] kmem_cache_alloc+0x16b/0x370 [ 44.717706] vm_area_dup+0x20/0x160 [ 44.718209] __split_vma+0x170/0x950 [ 44.718721] split_vma+0xc6/0x110 [ 44.719210] mprotect_fixup+0x8d2/0xb30 [ 44.719763] do_mprotect_pkey+0x87e/0xd40 [ 44.720340] __x64_sys_mprotect+0x78/0xc0 [ 44.720917] do_syscall_64+0x3f/0x90 [ 44.721440] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.722147] [ 44.722396] Freed by task 220: [ 44.722830] kasan_save_stack+0x22/0x50 [ 44.723393] kasan_set_track+0x25/0x30 [ 44.723935] kasan_save_free_info+0x2b/0x50 [ 44.724529] __kasan_slab_free+0x10a/0x190 [ 44.725117] kmem_cache_free+0x10d/0x4d0 [ 44.725677] rcu_core+0x8c8/0x2860 [ 44.726174] __do_softirq+0x1b7/0x7d4 [ 44.726718] [ 44.726956] Last potentially related work creation: [ 44.727607] kasan_save_stack+0x22/0x50 [ 44.728166] __kasan_record_aux_stack+0x8e/0xa0 [ 44.728803] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.729522] remove_vma+0x139/0x170 [ 44.730022] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.730649] do_vmi_munmap+0x1f1/0x2b0 [ 44.731185] __vm_munmap+0x138/0x3a0 [ 44.731708] __x64_sys_munmap+0x59/0x80 [ 44.732263] do_syscall_64+0x3f/0x90 [ 44.732786] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.733493] [ 44.733733] The buggy address belongs to the object at ffff888010094bc8 [ 44.733733] which belongs to the cache vm_area_struct of size 168 [ 44.735391] The buggy address is located 88 bytes inside of [ 44.735391] freed 168-byte region [ffff888010094bc8, ffff888010094c70) [ 44.736956] [ 44.737196] The buggy address belongs to the physical page: [ 44.737922] page:000000007a731501 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10094 [ 44.739137] memcg:ffff888018763a01 [ 44.739611] flags: 0x100000000000200(slab|node=0|zone=1) [ 44.740326] page_type: 0xffffffff() [ 44.740824] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 44.741851] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018763a01 [ 44.742872] page dumped because: kasan: bad access detected [ 44.743600] [ 44.743837] Memory state around the buggy address: [ 44.744481] ffff888010094b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 44.745420] ffff888010094b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 44.746374] >ffff888010094c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 44.747328] ^ [ 44.747914] ffff888010094c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 44.748867] ffff888010094d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 44.749814] ================================================================== [ 44.751067] Disabling lock debugging due to kernel taint [ 47.295958] BUG: Bad rss-counter state mm:00000000178343ad type:MM_FILEPAGES val:33 [ 47.297137] BUG: Bad rss-counter state mm:00000000178343ad type:MM_ANONPAGES val:22 [ 47.727980] BUG: Bad rss-counter state mm:00000000da87bc9d type:MM_FILEPAGES val:33 [ 47.728983] BUG: Bad rss-counter state mm:00000000da87bc9d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57733' (ECDSA) to the list of known hosts. 2023/06/19 22:39:32 fuzzer started 2023/06/19 22:39:32 dialing manager at localhost:44161 2023/06/19 22:39:32 checking machine... 2023/06/19 22:39:32 checking revisions... [ 48.495119] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:39:32 testing simple program... [ 48.547423] cgroup: Unknown subsys name 'net' [ 48.598093] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:39:26 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000004 RCX=0000000000000000 RDX=1ffff11002b997c6 RSI=ffffffff81f1b457 RDI=ffff888015ccbe30 RBP=ffff88800c57e500 RSP=ffff88800c6a7cc8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000004 R11=0000000000000000 R12=ffff88800da2f840 R13=ffff88800c57e690 R14=ffff888015ccb680 R15=ffff888018ea9680 RIP=ffffffff81f1b477 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 00007f5163250900 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=00007f5163805650 CR3=000000000c5e6000 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=0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a XMM01=00000000000000000000000000000000 XMM02=ffffffffffffff00ffff000000000000 XMM03=7720656c62697461706d6f63206d6874 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00ffffffffffffffffffffffffffffff XMM08=00000000000000810000363532616873 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff81b3c663 RDX=ffff888015cbb680 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff88800b604d80 RSP=ffff888019e878a8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=ffff88801629fcd8 R14=ffff888018e09680 R15=ffff888019e879d8 RIP=ffffffff814c07e0 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 00007f3d74b19700 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=00007fcf10d761b0 CR3=000000000d4b8000 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=2031333a39333a3232203931206e754a XMM01=73732878696e755f6d6170203a5d3633 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3633325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a39333a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000