syzkaller login: [ 37.567628] BUG: Bad rss-counter state mm:00000000beb80047 type:MM_FILEPAGES val:33 [ 37.568409] BUG: Bad rss-counter state mm:00000000beb80047 type:MM_ANONPAGES val:22 [ 37.715009] ================================================================== [ 37.716046] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.717105] Read of size 8 at addr ffff888019c4bd08 by task sshd/219 [ 37.717978] [ 37.718220] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.719197] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.720230] Call Trace: [ 37.720548] [ 37.720838] dump_stack_lvl+0x91/0xf0 [ 37.721329] print_report+0xcc/0x620 [ 37.721814] ? __virt_addr_valid+0x102/0x340 [ 37.722373] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.722999] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.723626] kasan_report+0xbe/0xf0 [ 37.724109] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.724736] vma_interval_tree_remove+0xc75/0xec0 [ 37.725354] vma_prepare+0xc54/0x11a0 [ 37.725843] __split_vma+0x5af/0x950 [ 37.726324] ? __pfx___split_vma+0x10/0x10 [ 37.726862] ? find_held_lock+0x2c/0x110 [ 37.727403] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.727986] ? lock_is_held_type+0x9f/0x120 [ 37.728528] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.729134] ? mtree_range_walk+0x632/0x900 [ 37.729686] ? mas_walk+0x5c7/0x7c0 [ 37.730167] do_vmi_munmap+0x1f1/0x2b0 [ 37.730668] mmap_region+0x1f9/0x2660 [ 37.731159] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.731688] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.732414] ? __pfx_lock_acquire+0x10/0x10 [ 37.732956] ? __pfx_mmap_region+0x10/0x10 [ 37.733491] ? security_mmap_addr+0x7d/0xa0 [ 37.734031] ? get_unmapped_area+0x1f5/0x3f0 [ 37.734586] do_mmap+0x854/0xf00 [ 37.735030] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.735536] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.736136] ksys_mmap_pgoff+0x3af/0x500 [ 37.736645] do_syscall_64+0x3f/0x90 [ 37.737126] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.737781] RIP: 0033:0x7fe60e9b1d82 [ 37.738247] 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 [ 37.740398] RSP: 002b:00007ffe0c81b878 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.741320] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe60e9b1d82 [ 37.742179] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe60ddeb000 [ 37.743041] RBP: 00007fe60ddeb000 R08: 0000000000000009 R09: 0000000000001000 [ 37.743910] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e75f4afd90 [ 37.744815] R13: 00007ffe0c81b890 R14: 00007ffe0c81b8c0 R15: 00007ffe0c81bc20 [ 37.745679] [ 37.745976] [ 37.746191] Allocated by task 212: [ 37.746629] kasan_save_stack+0x22/0x50 [ 37.747136] kasan_set_track+0x25/0x30 [ 37.747666] __kasan_slab_alloc+0x59/0x70 [ 37.748198] kmem_cache_alloc+0x16b/0x370 [ 37.748728] vm_area_dup+0x20/0x160 [ 37.749191] __split_vma+0x170/0x950 [ 37.749656] split_vma+0xc6/0x110 [ 37.750115] mprotect_fixup+0x8d2/0xb30 [ 37.750622] do_mprotect_pkey+0x87e/0xd40 [ 37.751214] __x64_sys_mprotect+0x78/0xc0 [ 37.751745] do_syscall_64+0x3f/0x90 [ 37.752217] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.752879] [ 37.753101] Freed by task 212: [ 37.753498] kasan_save_stack+0x22/0x50 [ 37.754001] kasan_set_track+0x25/0x30 [ 37.754504] kasan_save_free_info+0x2b/0x50 [ 37.755042] __kasan_slab_free+0x10a/0x190 [ 37.755602] kmem_cache_free+0x10d/0x4d0 [ 37.756128] rcu_core+0x8c8/0x2860 [ 37.756601] __do_softirq+0x1b7/0x7d4 [ 37.757103] [ 37.757327] Last potentially related work creation: [ 37.757950] kasan_save_stack+0x22/0x50 [ 37.758472] __kasan_record_aux_stack+0x8e/0xa0 [ 37.759080] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.759781] remove_vma+0x139/0x170 [ 37.760267] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.760846] do_vmi_munmap+0x1f1/0x2b0 [ 37.761362] __vm_munmap+0x138/0x3a0 [ 37.761857] __x64_sys_munmap+0x59/0x80 [ 37.762379] do_syscall_64+0x3f/0x90 [ 37.762882] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.763567] [ 37.763793] The buggy address belongs to the object at ffff888019c4bcb0 [ 37.763793] which belongs to the cache vm_area_struct of size 168 [ 37.765346] The buggy address is located 88 bytes inside of [ 37.765346] freed 168-byte region [ffff888019c4bcb0, ffff888019c4bd58) [ 37.766834] [ 37.767064] The buggy address belongs to the physical page: [ 37.767785] page:00000000bcc864ef refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19c4b [ 37.768936] memcg:ffff88800ea1b101 [ 37.769390] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.770066] page_type: 0xffffffff() [ 37.770548] raw: 0100000000000200 ffff88800879fc80 ffffea0000671380 dead000000000002 [ 37.771534] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea1b101 [ 37.772491] page dumped because: kasan: bad access detected [ 37.773195] [ 37.773423] Memory state around the buggy address: [ 37.774048] ffff888019c4bc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 37.774947] ffff888019c4bc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 37.775873] >ffff888019c4bd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 37.776791] ^ [ 37.777265] ffff888019c4bd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 37.778190] ffff888019c4be00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 37.779129] ================================================================== [ 37.780135] Disabling lock debugging due to kernel taint [ 39.932379] BUG: Bad rss-counter state mm:00000000ae7994bb type:MM_FILEPAGES val:33 [ 39.933794] BUG: Bad rss-counter state mm:00000000ae7994bb type:MM_ANONPAGES val:22 [ 40.418948] BUG: Bad rss-counter state mm:00000000ca76062b type:MM_FILEPAGES val:33 [ 40.419984] BUG: Bad rss-counter state mm:00000000ca76062b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4215' (ECDSA) to the list of known hosts. 2023/06/19 20:56:25 fuzzer started 2023/06/19 20:56:25 dialing manager at localhost:44161 2023/06/19 20:56:25 checking machine... 2023/06/19 20:56:25 checking revisions... [ 41.143414] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:56:26 testing simple program... [ 41.190365] cgroup: Unknown subsys name 'net' [ 41.249433] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:56:23 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff812d869a RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff110028c7f1b RSP=ffff88801463f8c8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000001 R12=ffff8880166f9e68 R13=ffffffff83c20850 R14=ffff88801463fa70 R15=0000000000000053 RIP=ffffffff812d86a2 RFL=00000247 [---Z-PC] 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 00007fe62e740900 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=00007fe62dc60000 CR3=0000000013e5e000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=6e5456fc8d36598b00000000000ae988 XMM05=d4394af9565a2b020000000000134e88 XMM06=7be15a6ab3f2f22600000000001338b8 XMM07=fb795ef6d65770560000000000124160 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff864bb02e RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806cf09ada RSP=ffff88806cf09a28 R8 =ffffffff864bb032 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b6cb2 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88800d5af888 R15=ffff88806cf09a98 RIP=ffffffff81131928 RFL=00000297 [--S-APC] 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 00007f4fd894d900 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=00007ffefcd79000 CR3=000000001a2e6000 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=563412feff00545000000000000080fe XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000