syzkaller login: [ 33.293998] BUG: Bad rss-counter state mm:00000000f542f194 type:MM_FILEPAGES val:33 [ 33.295225] BUG: Bad rss-counter state mm:00000000f542f194 type:MM_ANONPAGES val:22 [ 33.328280] ================================================================== [ 33.328967] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.329633] Read of size 8 at addr ffff88801653d310 by task sshd/221 [ 33.330093] [ 33.330252] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.330810] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.331533] Call Trace: [ 33.331740] [ 33.331988] dump_stack_lvl+0x91/0xf0 [ 33.332323] print_report+0xcc/0x620 [ 33.332631] ? __virt_addr_valid+0x102/0x340 [ 33.333050] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.333565] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.333919] kasan_report+0xbe/0xf0 [ 33.334199] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.334687] vma_interval_tree_remove+0xc75/0xec0 [ 33.335034] vma_prepare+0xc54/0x11a0 [ 33.335359] __split_vma+0x5af/0x950 [ 33.335716] ? __pfx___split_vma+0x10/0x10 [ 33.336033] ? find_held_lock+0x2c/0x110 [ 33.336414] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.336749] ? lock_is_held_type+0x9f/0x120 [ 33.337153] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.337506] ? mtree_range_walk+0x632/0x900 [ 33.337930] ? mas_walk+0x5c7/0x7c0 [ 33.338213] do_vmi_munmap+0x1f1/0x2b0 [ 33.338604] mmap_region+0x1f9/0x2660 [ 33.338904] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.339238] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.339699] ? __pfx_lock_acquire+0x10/0x10 [ 33.340117] ? __pfx_mmap_region+0x10/0x10 [ 33.340437] ? security_mmap_addr+0x7d/0xa0 [ 33.340750] ? get_unmapped_area+0x1f5/0x3f0 [ 33.341078] do_mmap+0x854/0xf00 [ 33.341388] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.341752] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.342098] ksys_mmap_pgoff+0x3af/0x500 [ 33.342397] do_syscall_64+0x3f/0x90 [ 33.342674] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.343057] RIP: 0033:0x7fa534ec9d82 [ 33.343322] 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 [ 33.344569] RSP: 002b:00007ffde9f34e88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.345102] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa534ec9d82 [ 33.345606] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa534303000 [ 33.346099] RBP: 00007fa534303000 R08: 0000000000000009 R09: 0000000000001000 [ 33.346610] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bca38caec0 [ 33.347124] R13: 00007ffde9f34ea0 R14: 00007ffde9f34ed0 R15: 00007ffde9f35230 [ 33.347638] [ 33.347807] [ 33.347930] Allocated by task 214: [ 33.348183] kasan_save_stack+0x22/0x50 [ 33.348478] kasan_set_track+0x25/0x30 [ 33.348773] __kasan_slab_alloc+0x59/0x70 [ 33.349079] kmem_cache_alloc+0x16b/0x370 [ 33.349379] vm_area_dup+0x20/0x160 [ 33.349642] __split_vma+0x170/0x950 [ 33.349914] split_vma+0xc6/0x110 [ 33.350172] mprotect_fixup+0x8d2/0xb30 [ 33.350458] do_mprotect_pkey+0x87e/0xd40 [ 33.350765] __x64_sys_mprotect+0x78/0xc0 [ 33.351085] do_syscall_64+0x3f/0x90 [ 33.351363] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.351741] [ 33.351862] Freed by task 214: [ 33.352087] kasan_save_stack+0x22/0x50 [ 33.352375] kasan_set_track+0x25/0x30 [ 33.352671] kasan_save_free_info+0x2b/0x50 [ 33.352978] __kasan_slab_free+0x10a/0x190 [ 33.353288] kmem_cache_free+0x10d/0x4d0 [ 33.353590] rcu_core+0x8c8/0x2860 [ 33.353851] __do_softirq+0x1b7/0x7d4 [ 33.354126] [ 33.354248] Last potentially related work creation: [ 33.354596] kasan_save_stack+0x22/0x50 [ 33.354898] __kasan_record_aux_stack+0x8e/0xa0 [ 33.355240] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.355605] remove_vma+0x139/0x170 [ 33.355872] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.356200] do_vmi_munmap+0x1f1/0x2b0 [ 33.356487] __vm_munmap+0x138/0x3a0 [ 33.356761] __x64_sys_munmap+0x59/0x80 [ 33.357056] do_syscall_64+0x3f/0x90 [ 33.357333] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.357708] [ 33.357838] The buggy address belongs to the object at ffff88801653d2b8 [ 33.357838] which belongs to the cache vm_area_struct of size 168 [ 33.358710] The buggy address is located 88 bytes inside of [ 33.358710] freed 168-byte region [ffff88801653d2b8, ffff88801653d360) [ 33.359559] [ 33.359687] The buggy address belongs to the physical page: [ 33.360088] page:000000009cc2254a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1653d [ 33.360749] memcg:ffff88800d67c401 [ 33.361001] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.361385] page_type: 0xffffffff() [ 33.361660] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.362192] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d67c401 [ 33.362729] page dumped because: kasan: bad access detected [ 33.363129] [ 33.363254] Memory state around the buggy address: [ 33.363600] ffff88801653d200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 33.364108] ffff88801653d280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 33.364618] >ffff88801653d300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 33.365128] ^ [ 33.365404] ffff88801653d380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 33.365920] ffff88801653d400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 33.366420] ================================================================== [ 33.367018] Disabling lock debugging due to kernel taint [ 35.357786] BUG: Bad rss-counter state mm:000000006a24569d type:MM_FILEPAGES val:33 [ 35.358866] BUG: Bad rss-counter state mm:000000006a24569d type:MM_ANONPAGES val:22 [ 35.888505] BUG: Bad rss-counter state mm:000000001abc45e4 type:MM_FILEPAGES val:33 [ 35.889515] BUG: Bad rss-counter state mm:000000001abc45e4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52011' (ECDSA) to the list of known hosts. 2023/06/20 06:29:36 fuzzer started 2023/06/20 06:29:36 dialing manager at localhost:44161 2023/06/20 06:29:36 checking machine... 2023/06/20 06:29:36 checking revisions... [ 36.506554] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:29:36 testing simple program... [ 36.546653] cgroup: Unknown subsys name 'net' [ 36.599244] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:29:34 Registers: info registers vcpu 0 RAX=fffffbfff0ba77db RBX=ffff88806ce3a2c0 RCX=ffffffff81377f7f RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=fffffbfff0ba77da RSP=ffff88806ce09e50 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=1ffff1100d9c7479 R12=0000000000000000 R13=ffff88806ce09ee8 R14=0000000000000200 R15=ffff88806ce3a360 RIP=ffffffff8180efaf 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f132fa16900 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=00007f133056a044 CR3=000000000f38a000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=000000000000000000000000000000ff XMM05=000000000000000000000000000000ff XMM06=6c1e6e69585a257419321e012e302e00 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007fee781a2c10 CR3=000000000c66a000 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=3261469e103da6b6fa4168ede3dd1424 XMM02=000000000011e418ec2efd57dc4c00df XMM03=0000000000125120e27b147493c9617a XMM04=2ceab8d15582e1d400000000000ae988 XMM05=e4cb8bb95a7664b60000000000134c70 XMM06=60e4d5ab0313753e0000000000133ad8 XMM07=e042d86d42eb936e00000000001253a0 XMM08=e27b147493c9617a000000000011e478 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000