syzkaller login: [ 30.901868] BUG: Bad rss-counter state mm:00000000d7150b68 type:MM_FILEPAGES val:33 [ 30.903749] BUG: Bad rss-counter state mm:00000000d7150b68 type:MM_ANONPAGES val:22 [ 31.070155] ================================================================== [ 31.071068] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.072007] Read of size 8 at addr ffff88800de6fb38 by task sshd/220 [ 31.072773] [ 31.072997] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.073975] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.074965] Call Trace: [ 31.075293] [ 31.075574] dump_stack_lvl+0x91/0xf0 [ 31.076066] print_report+0xcc/0x620 [ 31.076544] ? __virt_addr_valid+0x102/0x340 [ 31.077104] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.077721] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.078368] kasan_report+0xbe/0xf0 [ 31.078850] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.079477] vma_interval_tree_remove+0xc75/0xec0 [ 31.080080] vma_prepare+0xc54/0x11a0 [ 31.080562] __split_vma+0x5af/0x950 [ 31.081044] ? __pfx___split_vma+0x10/0x10 [ 31.081579] ? find_held_lock+0x2c/0x110 [ 31.082096] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.082674] ? lock_is_held_type+0x9f/0x120 [ 31.083222] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.083836] ? mtree_range_walk+0x632/0x900 [ 31.084405] ? mas_walk+0x5c7/0x7c0 [ 31.084885] do_vmi_munmap+0x1f1/0x2b0 [ 31.085385] mmap_region+0x1f9/0x2660 [ 31.085869] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.086390] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.087100] ? __pfx_lock_acquire+0x10/0x10 [ 31.087629] ? __pfx_mmap_region+0x10/0x10 [ 31.088159] ? security_mmap_addr+0x7d/0xa0 [ 31.088685] ? get_unmapped_area+0x1f5/0x3f0 [ 31.089238] do_mmap+0x854/0xf00 [ 31.089675] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.090168] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.090731] ksys_mmap_pgoff+0x3af/0x500 [ 31.091233] do_syscall_64+0x3f/0x90 [ 31.091710] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.092351] RIP: 0033:0x7fc68aac4d82 [ 31.092806] 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 [ 31.094959] RSP: 002b:00007ffd48964888 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.095875] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc68aac4d82 [ 31.096740] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc689efe000 [ 31.097598] RBP: 00007fc689efe000 R08: 0000000000000009 R09: 0000000000001000 [ 31.098462] R10: 0000000000000812 R11: 0000000000000206 R12: 00005571fb836d90 [ 31.099332] R13: 00007ffd489648a0 R14: 00007ffd489648d0 R15: 00007ffd48964c30 [ 31.100199] [ 31.100491] [ 31.100710] Allocated by task 213: [ 31.101133] kasan_save_stack+0x22/0x50 [ 31.101642] kasan_set_track+0x25/0x30 [ 31.102146] __kasan_slab_alloc+0x59/0x70 [ 31.102682] kmem_cache_alloc+0x16b/0x370 [ 31.103209] vm_area_dup+0x20/0x160 [ 31.103672] __split_vma+0x170/0x950 [ 31.104137] split_vma+0xc6/0x110 [ 31.104572] mprotect_fixup+0x8d2/0xb30 [ 31.105081] do_mprotect_pkey+0x87e/0xd40 [ 31.105613] __x64_sys_mprotect+0x78/0xc0 [ 31.106133] do_syscall_64+0x3f/0x90 [ 31.106623] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.107262] [ 31.107477] Freed by task 203: [ 31.107873] kasan_save_stack+0x22/0x50 [ 31.108376] kasan_set_track+0x25/0x30 [ 31.108867] kasan_save_free_info+0x2b/0x50 [ 31.109407] __kasan_slab_free+0x10a/0x190 [ 31.109934] kmem_cache_free+0x10d/0x4d0 [ 31.110449] rcu_core+0x8c8/0x2860 [ 31.110892] __do_softirq+0x1b7/0x7d4 [ 31.111367] [ 31.111582] Last potentially related work creation: [ 31.112168] kasan_save_stack+0x22/0x50 [ 31.112669] __kasan_record_aux_stack+0x8e/0xa0 [ 31.113250] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.113886] remove_vma+0x139/0x170 [ 31.114348] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.114903] do_vmi_munmap+0x1f1/0x2b0 [ 31.115382] __vm_munmap+0x138/0x3a0 [ 31.115846] __x64_sys_munmap+0x59/0x80 [ 31.116345] do_syscall_64+0x3f/0x90 [ 31.116826] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.117471] [ 31.117687] The buggy address belongs to the object at ffff88800de6fae0 [ 31.117687] which belongs to the cache vm_area_struct of size 168 [ 31.119288] The buggy address is located 88 bytes inside of [ 31.119288] freed 168-byte region [ffff88800de6fae0, ffff88800de6fb88) [ 31.120771] [ 31.120993] The buggy address belongs to the physical page: [ 31.121647] page:00000000169b78ff refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde6f [ 31.122740] memcg:ffff88800edaba01 [ 31.123175] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.123822] page_type: 0xffffffff() [ 31.124278] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.125188] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800edaba01 [ 31.126092] page dumped because: kasan: bad access detected [ 31.126773] [ 31.126992] Memory state around the buggy address: [ 31.127575] ffff88800de6fa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.128443] ffff88800de6fa80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.129304] >ffff88800de6fb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.130167] ^ [ 31.130792] ffff88800de6fb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.131643] ffff88800de6fc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.132487] ================================================================== [ 31.133454] Disabling lock debugging due to kernel taint [ 33.953149] BUG: Bad rss-counter state mm:0000000071a6a161 type:MM_FILEPAGES val:33 [ 33.954459] BUG: Bad rss-counter state mm:0000000071a6a161 type:MM_ANONPAGES val:22 [ 34.507999] BUG: Bad rss-counter state mm:00000000faf91a97 type:MM_FILEPAGES val:33 [ 34.509174] BUG: Bad rss-counter state mm:00000000faf91a97 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36015' (ECDSA) to the list of known hosts. 2023/06/21 04:58:11 fuzzer started 2023/06/21 04:58:11 dialing manager at localhost:36067 2023/06/21 04:58:11 checking machine... 2023/06/21 04:58:11 checking revisions... [ 35.179272] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:58:11 testing simple program... [ 35.230579] cgroup: Unknown subsys name 'net' [ 35.267772] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:58:10 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0005fe9c9d49e9df RCX=00000000000bcd5f RDX=00000000ffffffff RSI=ffffffffffffffff RDI=0000561855740360 RBP=0000561855740360 RSP=00007fff6605b490 R8 =0000000064928362 R9 =00007fff66198080 R10=00007fff66198080 R11=000000000000e1a6 R12=0000000000000057 R13=ffffffffffffffff R14=0000000000000000 R15=0000000000000000 RIP=00007f326c2194a2 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f326b6a0900 00000000 00000000 GS =0000 0000000000000000 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=00007f326aae6430 CR3=000000000ca44000 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=7e8a42789393c4b7000000000011a298 XMM01=21f908dd42991c906347eb524661d386 XMM02=2c67c8bc2e329bc3000000000011a570 XMM03=fb795ef6d657705600000000001219d8 XMM04=a2bfbe003f82eff600000000000ae988 XMM05=19e9129bd510f23500000000001317a8 XMM06=8d68aec7f94855750000000000130610 XMM07=e042d86d42eb936e0000000000121c58 XMM08=eee93d1ca726edab000000000011a5d0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff110032c05d7 RBX=ffff88800d689658 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff888019602eb8 RBP=ffff88801925e8d0 RSP=ffff888008e37c98 R8 =0000000000000001 R9 =ffffed10011c6f87 R10=0000000000000003 R11=0000000000000128 R12=dffffc0000000000 R13=ffff88801923a840 R14=ffffffff818d9c06 R15=ffff888019601d00 RIP=ffffffff818464cd RFL=00000046 [---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 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=00007fff3a844000 CR3=000000000f46a000 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