syzkaller login: [ 31.771804] BUG: Bad rss-counter state mm:00000000c8979403 type:MM_FILEPAGES val:33 [ 31.773034] BUG: Bad rss-counter state mm:00000000c8979403 type:MM_ANONPAGES val:22 [ 31.815353] ================================================================== [ 31.816602] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.817846] Read of size 8 at addr ffff888019a57c20 by task sshd/220 [ 31.818784] [ 31.819045] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.820103] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.821284] Call Trace: [ 31.821676] <TASK> [ 31.822036] dump_stack_lvl+0x91/0xf0 [ 31.822622] print_report+0xcc/0x620 [ 31.823214] ? __virt_addr_valid+0x102/0x340 [ 31.823899] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.824647] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.825411] kasan_report+0xbe/0xf0 [ 31.826009] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.826769] vma_interval_tree_remove+0xc75/0xec0 [ 31.827491] vma_prepare+0xc54/0x11a0 [ 31.828134] __split_vma+0x5af/0x950 [ 31.828621] ? __pfx___split_vma+0x10/0x10 [ 31.828950] ? find_held_lock+0x2c/0x110 [ 31.829266] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.829606] ? lock_is_held_type+0x9f/0x120 [ 31.829951] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.830312] ? mtree_range_walk+0x632/0x900 [ 31.830649] ? mas_walk+0x5c7/0x7c0 [ 31.830932] do_vmi_munmap+0x1f1/0x2b0 [ 31.831228] mmap_region+0x1f9/0x2660 [ 31.831527] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.831857] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.832279] ? __pfx_lock_acquire+0x10/0x10 [ 31.832598] ? __pfx_mmap_region+0x10/0x10 [ 31.832923] ? security_mmap_addr+0x7d/0xa0 [ 31.833243] ? get_unmapped_area+0x1f5/0x3f0 [ 31.833559] do_mmap+0x854/0xf00 [ 31.833846] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.834148] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.834494] ksys_mmap_pgoff+0x3af/0x500 [ 31.834807] do_syscall_64+0x3f/0x90 [ 31.835088] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.835470] RIP: 0033:0x7f8d6abffd82 [ 31.835764] 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 [ 31.837068] RSP: 002b:00007ffc68a58508 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.837634] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8d6abffd82 [ 31.838179] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8d6a039000 [ 31.838708] RBP: 00007f8d6a039000 R08: 0000000000000009 R09: 0000000000001000 [ 31.839220] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fe5611eec0 [ 31.839757] R13: 00007ffc68a58520 R14: 00007ffc68a58550 R15: 00007ffc68a588b0 [ 31.840251] </TASK> [ 31.840427] [ 31.840553] Allocated by task 213: [ 31.840824] kasan_save_stack+0x22/0x50 [ 31.841127] kasan_set_track+0x25/0x30 [ 31.841423] __kasan_slab_alloc+0x59/0x70 [ 31.841752] kmem_cache_alloc+0x16b/0x370 [ 31.842062] vm_area_dup+0x20/0x160 [ 31.842330] __split_vma+0x170/0x950 [ 31.842603] split_vma+0xc6/0x110 [ 31.842868] mprotect_fixup+0x8d2/0xb30 [ 31.843164] do_mprotect_pkey+0x87e/0xd40 [ 31.843471] __x64_sys_mprotect+0x78/0xc0 [ 31.843799] do_syscall_64+0x3f/0x90 [ 31.844080] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.844460] [ 31.844593] Freed by task 213: [ 31.844836] kasan_save_stack+0x22/0x50 [ 31.845139] kasan_set_track+0x25/0x30 [ 31.845433] kasan_save_free_info+0x2b/0x50 [ 31.845768] __kasan_slab_free+0x10a/0x190 [ 31.846086] kmem_cache_free+0x10d/0x4d0 [ 31.846385] rcu_core+0x8c8/0x2860 [ 31.846656] __do_softirq+0x1b7/0x7d4 [ 31.846937] [ 31.847063] Last potentially related work creation: [ 31.847406] kasan_save_stack+0x22/0x50 [ 31.847737] __kasan_record_aux_stack+0x8e/0xa0 [ 31.848078] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.848469] remove_vma+0x139/0x170 [ 31.848749] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.849077] do_vmi_munmap+0x1f1/0x2b0 [ 31.849362] __vm_munmap+0x138/0x3a0 [ 31.849644] __x64_sys_munmap+0x59/0x80 [ 31.849951] do_syscall_64+0x3f/0x90 [ 31.850233] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.850613] [ 31.850747] The buggy address belongs to the object at ffff888019a57bc8 [ 31.850747] which belongs to the cache vm_area_struct of size 168 [ 31.851628] The buggy address is located 88 bytes inside of [ 31.851628] freed 168-byte region [ffff888019a57bc8, ffff888019a57c70) [ 31.852476] [ 31.852603] The buggy address belongs to the physical page: [ 31.852996] page:000000002a945f47 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19a57 [ 31.853635] memcg:ffff888016129301 [ 31.853903] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.854321] page_type: 0xffffffff() [ 31.854588] raw: 0100000000000200 ffff88800879fc80 ffffea00005a4100 dead000000000003 [ 31.855136] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016129301 [ 31.855689] page dumped because: kasan: bad access detected [ 31.856077] [ 31.856203] Memory state around the buggy address: [ 31.856541] ffff888019a57b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.857049] ffff888019a57b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.857548] >ffff888019a57c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.858067] ^ [ 31.858379] ffff888019a57c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.858883] ffff888019a57d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.859381] ================================================================== [ 31.860065] Disabling lock debugging due to kernel taint [ 34.089501] BUG: Bad rss-counter state mm:00000000a6fd2545 type:MM_FILEPAGES val:33 [ 34.090655] BUG: Bad rss-counter state mm:00000000a6fd2545 type:MM_ANONPAGES val:22 [ 34.564751] BUG: Bad rss-counter state mm:0000000095fe6ba3 type:MM_FILEPAGES val:33 [ 34.565896] BUG: Bad rss-counter state mm:0000000095fe6ba3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7958' (ECDSA) to the list of known hosts. 2023/06/20 01:38:25 fuzzer started 2023/06/20 01:38:25 dialing manager at localhost:44161 2023/06/20 01:38:25 checking machine... 2023/06/20 01:38:25 checking revisions... [ 35.150455] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:38:25 testing simple program... [ 35.181488] cgroup: Unknown subsys name 'net' [ 35.247847] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:38:23 Registers: info registers vcpu 0 RAX=00000000000b6996 RBX=0000000000000001 RCX=ffffffff846000a9 RDX=0000000000000002 RSI=ffffffff864b9d50 RDI=ffffffff86053a2c RBP=ffff88800ff67ad8 RSP=ffff88800ff67a00 R8 =ffffffff864b9d50 R9 =ffff88800ff67ac0 R10=0000000000038001 R11=00000000000b6996 R12=ffff88800ff67ae0 R13=ffff88800ff67ac8 R14=ffff88800ff67ac1 R15=ffff88800ff67a80 RIP=ffffffff8112fc12 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 00007f5c7751e900 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=00007f5c77ad3650 CR3=000000000d672000 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=0000000000000001 RBX=0000000000000001 RCX=ffffffff813c020a RDX=fffffbfff0ba77db RSI=0000000000000001 RDI=0000000000000000 RBP=00000007fd831f80 RSP=ffff88806cf09e40 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=ffff88806cf09ff8 R12=ffff88806cf2c250 R13=ffff88806cf2b940 R14=ffff88806cf2b9c0 R15=dffffc0000000000 RIP=ffffffff814c0328 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=00007f1b19f9c380 CR3=000000000c560000 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=890e7962912709b77e40fd6de7d0e894 XMM02=ec2efd57dc4c00df000000000011cd60 XMM03=b4d53e5c46a9129f000000000011ce30 XMM04=f4a253b5d2b53d3400000000000ae988 XMM05=3980a2e53d654c270000000000134c88 XMM06=4fda316b135da52b0000000000133d28 XMM07=e042d86d42eb936e00000000001245c8 XMM08=b4d53e5c46a9129f000000000011ce30 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000