syzkaller login: [ 33.531712] BUG: Bad rss-counter state mm:00000000c541f3ed type:MM_FILEPAGES val:33 [ 33.532686] BUG: Bad rss-counter state mm:00000000c541f3ed type:MM_ANONPAGES val:22 [ 33.655336] ================================================================== [ 33.656057] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.656701] Read of size 8 at addr ffff88801a14f310 by task sshd/220 [ 33.657255] [ 33.657403] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.658077] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.658804] Call Trace: [ 33.659036] [ 33.659232] dump_stack_lvl+0x91/0xf0 [ 33.659792] print_report+0xcc/0x620 [ 33.660152] ? __virt_addr_valid+0x102/0x340 [ 33.660580] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.661032] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.661425] kasan_report+0xbe/0xf0 [ 33.661799] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.662252] vma_interval_tree_remove+0xc75/0xec0 [ 33.662680] vma_prepare+0xc54/0x11a0 [ 33.663033] __split_vma+0x5af/0x950 [ 33.663350] ? __pfx___split_vma+0x10/0x10 [ 33.663721] ? find_held_lock+0x2c/0x110 [ 33.664104] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.664482] ? lock_is_held_type+0x9f/0x120 [ 33.664870] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.665275] ? mtree_range_walk+0x632/0x900 [ 33.665842] ? mas_walk+0x5c7/0x7c0 [ 33.666233] do_vmi_munmap+0x1f1/0x2b0 [ 33.666613] mmap_region+0x1f9/0x2660 [ 33.666933] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.667270] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.667741] ? __pfx_lock_acquire+0x10/0x10 [ 33.668133] ? __pfx_mmap_region+0x10/0x10 [ 33.668485] ? security_mmap_addr+0x7d/0xa0 [ 33.668847] ? get_unmapped_area+0x1f5/0x3f0 [ 33.669209] do_mmap+0x854/0xf00 [ 33.669493] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.669887] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.670309] ksys_mmap_pgoff+0x3af/0x500 [ 33.670639] do_syscall_64+0x3f/0x90 [ 33.670966] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.671407] RIP: 0033:0x7f242a5d0d82 [ 33.671747] 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 [ 33.673143] RSP: 002b:00007fffcb2843a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.673745] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f242a5d0d82 [ 33.674282] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2429a0a000 [ 33.674861] RBP: 00007f2429a0a000 R08: 0000000000000009 R09: 0000000000001000 [ 33.675425] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560f65d85ec0 [ 33.675954] R13: 00007fffcb2843c0 R14: 00007fffcb2843f0 R15: 00007fffcb284750 [ 33.676514] [ 33.676698] [ 33.676832] Allocated by task 213: [ 33.677105] kasan_save_stack+0x22/0x50 [ 33.677429] kasan_set_track+0x25/0x30 [ 33.677782] __kasan_slab_alloc+0x59/0x70 [ 33.678130] kmem_cache_alloc+0x16b/0x370 [ 33.678462] vm_area_dup+0x20/0x160 [ 33.678750] __split_vma+0x170/0x950 [ 33.679044] split_vma+0xc6/0x110 [ 33.679343] mprotect_fixup+0x8d2/0xb30 [ 33.679682] do_mprotect_pkey+0x87e/0xd40 [ 33.680026] __x64_sys_mprotect+0x78/0xc0 [ 33.680402] do_syscall_64+0x3f/0x90 [ 33.680730] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.681178] [ 33.681332] Freed by task 213: [ 33.681627] kasan_save_stack+0x22/0x50 [ 33.681970] kasan_set_track+0x25/0x30 [ 33.682320] kasan_save_free_info+0x2b/0x50 [ 33.682696] __kasan_slab_free+0x10a/0x190 [ 33.683069] kmem_cache_free+0x10d/0x4d0 [ 33.683421] rcu_core+0x8c8/0x2860 [ 33.683747] __do_softirq+0x1b7/0x7d4 [ 33.684128] [ 33.684288] Last potentially related work creation: [ 33.684695] kasan_save_stack+0x22/0x50 [ 33.685065] __kasan_record_aux_stack+0x8e/0xa0 [ 33.685471] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.685953] remove_vma+0x139/0x170 [ 33.686266] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.686644] do_vmi_munmap+0x1f1/0x2b0 [ 33.687009] __vm_munmap+0x138/0x3a0 [ 33.687367] __x64_sys_munmap+0x59/0x80 [ 33.687753] do_syscall_64+0x3f/0x90 [ 33.688155] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.688589] [ 33.688735] The buggy address belongs to the object at ffff88801a14f2b8 [ 33.688735] which belongs to the cache vm_area_struct of size 168 [ 33.689799] The buggy address is located 88 bytes inside of [ 33.689799] freed 168-byte region [ffff88801a14f2b8, ffff88801a14f360) [ 33.690710] [ 33.690856] The buggy address belongs to the physical page: [ 33.691304] page:0000000026099c88 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a14f [ 33.692119] memcg:ffff888019e85201 [ 33.692403] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 33.692884] page_type: 0xffffffff() [ 33.693208] raw: 0100000000000200 ffff88800879fc80 ffffea0000252d00 000000000000000b [ 33.693894] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019e85201 [ 33.694520] page dumped because: kasan: bad access detected [ 33.694971] [ 33.695127] Memory state around the buggy address: [ 33.695539] ffff88801a14f200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 33.696138] ffff88801a14f280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 33.696753] >ffff88801a14f300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 33.697343] ^ [ 33.697752] ffff88801a14f380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.698350] ffff88801a14f400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 33.698967] ================================================================== [ 33.699733] Disabling lock debugging due to kernel taint [ 35.279374] BUG: Bad rss-counter state mm:00000000a6c210ab type:MM_FILEPAGES val:33 [ 35.280497] BUG: Bad rss-counter state mm:00000000a6c210ab type:MM_ANONPAGES val:22 [ 35.662650] BUG: Bad rss-counter state mm:0000000066376473 type:MM_FILEPAGES val:33 [ 35.663329] BUG: Bad rss-counter state mm:0000000066376473 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27149' (ECDSA) to the list of known hosts. 2023/06/20 09:00:00 fuzzer started 2023/06/20 09:00:00 dialing manager at localhost:44161 2023/06/20 09:00:00 checking machine... 2023/06/20 09:00:00 checking revisions... [ 36.226727] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:00:00 testing simple program... [ 36.266989] cgroup: Unknown subsys name 'net' [ 36.300571] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:59:58 Registers: info registers vcpu 0 RAX=ffffffff84531da7 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff110011aff3a RSI=ffffffff84531da7 RDI=ffff888008d7fa40 RBP=ffff888008d7fa10 RSP=ffff888008d7f970 R8 =0000000000000001 R9 =ffff888008d7f9b8 R10=0000000000038001 R11=000000000000fdc6 R12=ffff888008d7fa40 R13=0000000000000000 R14=ffff888008d70000 R15=ffff88801c9db1b0 RIP=ffffffff813ad420 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 0000000000000000 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=00007f1690a8c650 CR3=000000001837a000 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=00000000000000000000000000000000 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000004390009 RBX=ffff88800ebe8540 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff84531da7 RDI=ffffffff81371082 RBP=0000000000000200 RSP=ffff88806cf09dc0 R8 =00000000db160721 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff81845c80 R13=ffffea0000643e00 R14=ffffffff813782a8 R15=ffff888019e46800 RIP=ffffffff84532a40 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 00007f83cda87900 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=00007f83cced2470 CR3=0000000010284000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=c05397fcf07766cc00000000000ae988 XMM05=2dd5d8fca98bd8c900000000001350e0 XMM06=4fda316b135da52b0000000000134180 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000