syzkaller login: [ 56.165564] BUG: Bad rss-counter state mm:00000000ec433f3c type:MM_FILEPAGES val:33 [ 56.166624] BUG: Bad rss-counter state mm:00000000ec433f3c type:MM_ANONPAGES val:22 [ 56.351182] ================================================================== [ 56.352275] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 56.353293] Read of size 8 at addr ffff88800cd8ac20 by task sshd/221 [ 56.354222] [ 56.354451] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 56.355335] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 56.356352] Call Trace: [ 56.356680] [ 56.356971] dump_stack_lvl+0x91/0xf0 [ 56.357484] print_report+0xcc/0x620 [ 56.357968] ? __virt_addr_valid+0x102/0x340 [ 56.358517] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.359139] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.359748] kasan_report+0xbe/0xf0 [ 56.360256] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.360877] vma_interval_tree_remove+0xc75/0xec0 [ 56.361481] vma_prepare+0xc54/0x11a0 [ 56.361965] __split_vma+0x5af/0x950 [ 56.362433] ? __pfx___split_vma+0x10/0x10 [ 56.362960] ? find_held_lock+0x2c/0x110 [ 56.363483] do_vmi_align_munmap+0x2ba/0x11f0 [ 56.364061] ? lock_is_held_type+0x9f/0x120 [ 56.364610] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 56.365237] ? mtree_range_walk+0x632/0x900 [ 56.365817] ? mas_walk+0x5c7/0x7c0 [ 56.366287] do_vmi_munmap+0x1f1/0x2b0 [ 56.366778] mmap_region+0x1f9/0x2660 [ 56.367257] ? vm_mmap_pgoff+0x15c/0x3a0 [ 56.367791] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 56.368512] ? __pfx_lock_acquire+0x10/0x10 [ 56.369056] ? __pfx_mmap_region+0x10/0x10 [ 56.369587] ? security_mmap_addr+0x7d/0xa0 [ 56.370130] ? get_unmapped_area+0x1f5/0x3f0 [ 56.370675] do_mmap+0x854/0xf00 [ 56.371116] vm_mmap_pgoff+0x1a6/0x3a0 [ 56.371614] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 56.372204] ksys_mmap_pgoff+0x3af/0x500 [ 56.372714] do_syscall_64+0x3f/0x90 [ 56.373191] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.373877] RIP: 0033:0x7f3bd8759d82 [ 56.374363] 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 [ 56.376579] RSP: 002b:00007ffc496178c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 56.377495] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3bd8759d82 [ 56.378365] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3bd7b93000 [ 56.379231] RBP: 00007f3bd7b93000 R08: 0000000000000009 R09: 0000000000001000 [ 56.380085] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558c92888b20 [ 56.380926] R13: 00007ffc496178e0 R14: 00007ffc49617910 R15: 00007ffc49617c70 [ 56.381779] [ 56.382073] [ 56.382293] Allocated by task 212: [ 56.382720] kasan_save_stack+0x22/0x50 [ 56.383225] kasan_set_track+0x25/0x30 [ 56.383717] __kasan_slab_alloc+0x59/0x70 [ 56.384278] kmem_cache_alloc+0x16b/0x370 [ 56.384820] vm_area_dup+0x20/0x160 [ 56.385273] __split_vma+0x170/0x950 [ 56.385740] split_vma+0xc6/0x110 [ 56.386201] mprotect_fixup+0x8d2/0xb30 [ 56.386725] do_mprotect_pkey+0x87e/0xd40 [ 56.387244] __x64_sys_mprotect+0x78/0xc0 [ 56.387764] do_syscall_64+0x3f/0x90 [ 56.388250] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.388896] [ 56.389113] Freed by task 13: [ 56.389501] kasan_save_stack+0x22/0x50 [ 56.390009] kasan_set_track+0x25/0x30 [ 56.390500] kasan_save_free_info+0x2b/0x50 [ 56.391031] __kasan_slab_free+0x10a/0x190 [ 56.391567] kmem_cache_free+0x10d/0x4d0 [ 56.392083] rcu_core+0x8c8/0x2860 [ 56.392528] __do_softirq+0x1b7/0x7d4 [ 56.393000] [ 56.393215] Last potentially related work creation: [ 56.393800] kasan_save_stack+0x22/0x50 [ 56.394303] __kasan_record_aux_stack+0x8e/0xa0 [ 56.394878] __call_rcu_common.constprop.0+0x6a/0xb90 [ 56.395519] remove_vma+0x139/0x170 [ 56.395983] do_vmi_align_munmap+0xd4a/0x11f0 [ 56.396539] do_vmi_munmap+0x1f1/0x2b0 [ 56.397022] __vm_munmap+0x138/0x3a0 [ 56.397486] __x64_sys_munmap+0x59/0x80 [ 56.397980] do_syscall_64+0x3f/0x90 [ 56.398451] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.399090] [ 56.399309] The buggy address belongs to the object at ffff88800cd8abc8 [ 56.399309] which belongs to the cache vm_area_struct of size 168 [ 56.400783] The buggy address is located 88 bytes inside of [ 56.400783] freed 168-byte region [ffff88800cd8abc8, ffff88800cd8ac70) [ 56.402178] [ 56.402396] The buggy address belongs to the physical page: [ 56.403055] page:0000000052afd61d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcd8a [ 56.404166] memcg:ffff88800ee9cf01 [ 56.404590] flags: 0x100000000000200(slab|node=0|zone=1) [ 56.405235] page_type: 0xffffffff() [ 56.405681] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 56.406607] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee9cf01 [ 56.407511] page dumped because: kasan: bad access detected [ 56.408192] [ 56.408407] Memory state around the buggy address: [ 56.408986] ffff88800cd8ab00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 56.409846] ffff88800cd8ab80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 56.410711] >ffff88800cd8ac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 56.411573] ^ [ 56.412126] ffff88800cd8ac80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 56.412984] ffff88800cd8ad00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 56.413847] ================================================================== [ 56.415079] Disabling lock debugging due to kernel taint [ 58.602860] BUG: Bad rss-counter state mm:00000000953253e0 type:MM_FILEPAGES val:33 [ 58.604041] BUG: Bad rss-counter state mm:00000000953253e0 type:MM_ANONPAGES val:22 [ 59.019135] BUG: Bad rss-counter state mm:000000004c2fdc6b type:MM_FILEPAGES val:33 [ 59.020667] BUG: Bad rss-counter state mm:000000004c2fdc6b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3053' (ECDSA) to the list of known hosts. 2023/06/20 02:17:19 fuzzer started 2023/06/20 02:17:19 dialing manager at localhost:44161 2023/06/20 02:17:19 checking machine... 2023/06/20 02:17:19 checking revisions... [ 59.748779] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:17:19 testing simple program... [ 59.807956] cgroup: Unknown subsys name 'net' [ 59.848592] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:16:53 Registers: info registers vcpu 0 RAX=ffffffff81ef14ec RBX=ffffffff85e5cb04 RCX=ffffffff81ef1437 RDX=0000000000000000 RSI=ffffffff861c7664 RDI=ffffffff85e5cae4 RBP=ffffffff85e5cafc RSP=ffff888015d07820 R8 =ffffffff861c7664 R9 =ffff888015d07918 R10=0000000000038001 R11=0000000000038dc4 R12=ffffffff85e5cb00 R13=ffffffff85e5cae4 R14=ffffffff85e5caf8 R15=dffffc0000000000 RIP=ffffffff8112fc9f RFL=00000297 [--S-APC] 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 00007f50cf587900 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=00007f50cfb3f0b0 CR3=0000000019f9a000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=0000000000000001 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=00007f633ed3a010 CR3=000000000cbce000 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=2a66b5fa08b4779703437550ffb97763 XMM02=2c67c8bc2e329bc30000000000120140 XMM03=fb795ef6d65770560000000000124610 XMM04=c16594c3accf004800000000000ae988 XMM05=19e9129bd510f2350000000000134468 XMM06=7a51400f78452d6a00000000001332d0 XMM07=e042d86d42eb936e0000000000124890 XMM08=474a416d88d5012800000000001201a0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000