syzkaller login: [ 30.332112] BUG: Bad rss-counter state mm:0000000065ed52cb type:MM_FILEPAGES val:33 [ 30.333315] BUG: Bad rss-counter state mm:0000000065ed52cb type:MM_ANONPAGES val:22 [ 30.491965] ================================================================== [ 30.492874] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.493809] Read of size 8 at addr ffff88801a09ab38 by task sshd/219 [ 30.494671] [ 30.494890] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.495768] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.496774] Call Trace: [ 30.497096] [ 30.497378] dump_stack_lvl+0x91/0xf0 [ 30.497872] print_report+0xcc/0x620 [ 30.498365] ? __virt_addr_valid+0x102/0x340 [ 30.498937] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.499568] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.500195] kasan_report+0xbe/0xf0 [ 30.500673] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.501290] vma_interval_tree_remove+0xc75/0xec0 [ 30.501888] vma_prepare+0xc54/0x11a0 [ 30.502371] __split_vma+0x5af/0x950 [ 30.502861] ? __pfx___split_vma+0x10/0x10 [ 30.503384] ? find_held_lock+0x2c/0x110 [ 30.503907] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.504469] ? lock_is_held_type+0x9f/0x120 [ 30.505008] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.505616] ? mtree_range_walk+0x632/0x900 [ 30.506164] ? mas_walk+0x5c7/0x7c0 [ 30.506656] do_vmi_munmap+0x1f1/0x2b0 [ 30.507145] mmap_region+0x1f9/0x2660 [ 30.507624] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.508131] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.508846] ? __pfx_lock_acquire+0x10/0x10 [ 30.509378] ? __pfx_mmap_region+0x10/0x10 [ 30.509904] ? security_mmap_addr+0x7d/0xa0 [ 30.510432] ? get_unmapped_area+0x1f5/0x3f0 [ 30.511007] do_mmap+0x854/0xf00 [ 30.511453] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.511950] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.512512] ksys_mmap_pgoff+0x3af/0x500 [ 30.513022] do_syscall_64+0x3f/0x90 [ 30.513500] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.514144] RIP: 0033:0x7fbb478cfd82 [ 30.514603] 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 [ 30.516722] RSP: 002b:00007fff7b6a79f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.517629] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbb478cfd82 [ 30.518473] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbb46d09000 [ 30.519330] RBP: 00007fbb46d09000 R08: 0000000000000009 R09: 0000000000001000 [ 30.520165] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564d23f80ec0 [ 30.521008] R13: 00007fff7b6a7a10 R14: 00007fff7b6a7a40 R15: 00007fff7b6a7da0 [ 30.521857] [ 30.522149] [ 30.522363] Allocated by task 212: [ 30.522814] kasan_save_stack+0x22/0x50 [ 30.523317] kasan_set_track+0x25/0x30 [ 30.523807] __kasan_slab_alloc+0x59/0x70 [ 30.524331] kmem_cache_alloc+0x16b/0x370 [ 30.524859] vm_area_dup+0x20/0x160 [ 30.525317] __split_vma+0x170/0x950 [ 30.525801] split_vma+0xc6/0x110 [ 30.526258] mprotect_fixup+0x8d2/0xb30 [ 30.526790] do_mprotect_pkey+0x87e/0xd40 [ 30.527319] __x64_sys_mprotect+0x78/0xc0 [ 30.527848] do_syscall_64+0x3f/0x90 [ 30.528325] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.528986] [ 30.529202] Freed by task 212: [ 30.529604] kasan_save_stack+0x22/0x50 [ 30.530107] kasan_set_track+0x25/0x30 [ 30.530611] kasan_save_free_info+0x2b/0x50 [ 30.531142] __kasan_slab_free+0x10a/0x190 [ 30.531674] kmem_cache_free+0x10d/0x4d0 [ 30.532190] rcu_core+0x8c8/0x2860 [ 30.532633] __do_softirq+0x1b7/0x7d4 [ 30.533108] [ 30.533321] Last potentially related work creation: [ 30.533902] kasan_save_stack+0x22/0x50 [ 30.534414] __kasan_record_aux_stack+0x8e/0xa0 [ 30.534999] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.535642] remove_vma+0x139/0x170 [ 30.536095] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.536647] do_vmi_munmap+0x1f1/0x2b0 [ 30.537132] __vm_munmap+0x138/0x3a0 [ 30.537595] __x64_sys_munmap+0x59/0x80 [ 30.538092] do_syscall_64+0x3f/0x90 [ 30.538583] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.539224] [ 30.539439] The buggy address belongs to the object at ffff88801a09aae0 [ 30.539439] which belongs to the cache vm_area_struct of size 168 [ 30.540887] The buggy address is located 88 bytes inside of [ 30.540887] freed 168-byte region [ffff88801a09aae0, ffff88801a09ab88) [ 30.542288] [ 30.542511] The buggy address belongs to the physical page: [ 30.543171] page:00000000ea9694e6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a09a [ 30.544270] memcg:ffff888018567001 [ 30.544698] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.545347] page_type: 0xffffffff() [ 30.545798] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.546732] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018567001 [ 30.547638] page dumped because: kasan: bad access detected [ 30.548301] [ 30.548516] Memory state around the buggy address: [ 30.549092] ffff88801a09aa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.549944] ffff88801a09aa80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 30.550805] >ffff88801a09ab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.551654] ^ [ 30.552265] ffff88801a09ab80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.553122] ffff88801a09ac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.553969] ================================================================== [ 30.554939] Disabling lock debugging due to kernel taint [ 32.724337] BUG: Bad rss-counter state mm:00000000e3c6ba6e type:MM_FILEPAGES val:33 [ 32.725629] BUG: Bad rss-counter state mm:00000000e3c6ba6e type:MM_ANONPAGES val:22 [ 33.197539] BUG: Bad rss-counter state mm:0000000094c51f31 type:MM_FILEPAGES val:33 [ 33.198822] BUG: Bad rss-counter state mm:0000000094c51f31 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24477' (ECDSA) to the list of known hosts. 2023/06/20 18:34:25 fuzzer started 2023/06/20 18:34:25 dialing manager at localhost:36067 2023/06/20 18:34:25 checking machine... 2023/06/20 18:34:25 checking revisions... [ 33.902559] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:34:25 testing simple program... [ 33.959647] cgroup: Unknown subsys name 'net' [ 34.002839] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:34:25 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801644a5f0 RCX=ffff88800844f780 RDX=ffffea0000591280 RSI=ffff88800e9ece40 RDI=ffff88800844f780 RBP=0000000000000000 RSP=ffff88800dc5f918 R8 =ffff88801644a720 R9 =0000000000000000 R10=ffffea00003a7b00 R11=00000000800d0008 R12=dffffc0000000000 R13=ffff88800dc5f958 R14=ffff88800844f780 R15=ffff88800e9ece40 RIP=ffffffff81810316 RFL=00000202 [-------] 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 00007f3a23bb2700 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=00007f5fe38b1400 CR3=000000000ff98000 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=2035323a34333a3831203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a34333a3831203032 XMM08=20303d64696720303d64697520612f6e XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=ffff8880103ef5e8 RDX=1ffff1100207deb4 RSI=ffffffff813ad720 RDI=ffff8880103ef610 RBP=ffff8880103ef5e0 RSP=ffff8880103ef538 R8 =0000000000000001 R9 =ffff8880103ef588 R10=0000000000038001 R11=0000000000003c0d R12=ffff8880103ef610 R13=0000000000000000 R14=ffff888016ef51c0 R15=00000000000000e8 RIP=ffffffff813ad47f RFL=00000282 [--S----] 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 00007f1f669b5900 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=00007fffe0dca000 CR3=000000000d60a000 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=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