syzkaller login: [ 30.615695] BUG: Bad rss-counter state mm:0000000016e95437 type:MM_FILEPAGES val:33 [ 30.617069] BUG: Bad rss-counter state mm:0000000016e95437 type:MM_ANONPAGES val:22 [ 30.767734] ================================================================== [ 30.768990] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.770435] Read of size 8 at addr ffff88801a332798 by task sshd/219 [ 30.771499] [ 30.771797] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.773013] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.774138] Call Trace: [ 30.774512] [ 30.774843] dump_stack_lvl+0x91/0xf0 [ 30.775405] print_report+0xcc/0x620 [ 30.775970] ? __virt_addr_valid+0x102/0x340 [ 30.776610] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.777329] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.778065] kasan_report+0xbe/0xf0 [ 30.778633] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.779366] vma_interval_tree_remove+0xc75/0xec0 [ 30.780084] vma_prepare+0xc54/0x11a0 [ 30.780685] __split_vma+0x5af/0x950 [ 30.781252] ? __pfx___split_vma+0x10/0x10 [ 30.781885] ? find_held_lock+0x2c/0x110 [ 30.782508] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.783173] ? lock_is_held_type+0x9f/0x120 [ 30.783813] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.784542] ? mtree_range_walk+0x632/0x900 [ 30.785210] ? mas_walk+0x5c7/0x7c0 [ 30.785781] do_vmi_munmap+0x1f1/0x2b0 [ 30.786368] mmap_region+0x1f9/0x2660 [ 30.786940] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.787548] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.788389] ? __pfx_lock_acquire+0x10/0x10 [ 30.789046] ? __pfx_mmap_region+0x10/0x10 [ 30.789682] ? security_mmap_addr+0x7d/0xa0 [ 30.790354] ? get_unmapped_area+0x1f5/0x3f0 [ 30.791035] do_mmap+0x854/0xf00 [ 30.791556] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.792144] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.792831] ksys_mmap_pgoff+0x3af/0x500 [ 30.793444] do_syscall_64+0x3f/0x90 [ 30.794010] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.794771] RIP: 0033:0x7f0ac14abd82 [ 30.795306] 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 [ 30.797847] RSP: 002b:00007ffeae104ce8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.798918] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0ac14abd82 [ 30.799923] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0ac08e5000 [ 30.800933] RBP: 00007f0ac08e5000 R08: 0000000000000009 R09: 0000000000001000 [ 30.801936] R10: 0000000000000812 R11: 0000000000000206 R12: 00005592f7ed8ec0 [ 30.802931] R13: 00007ffeae104d00 R14: 00007ffeae104d30 R15: 00007ffeae105090 [ 30.803935] [ 30.804279] [ 30.804535] Allocated by task 212: [ 30.805045] kasan_save_stack+0x22/0x50 [ 30.805634] kasan_set_track+0x25/0x30 [ 30.806241] __kasan_slab_alloc+0x59/0x70 [ 30.806875] kmem_cache_alloc+0x16b/0x370 [ 30.807487] vm_area_dup+0x20/0x160 [ 30.808020] __split_vma+0x170/0x950 [ 30.808585] split_vma+0xc6/0x110 [ 30.809102] mprotect_fixup+0x8d2/0xb30 [ 30.809695] do_mprotect_pkey+0x87e/0xd40 [ 30.810309] __x64_sys_mprotect+0x78/0xc0 [ 30.810921] do_syscall_64+0x3f/0x90 [ 30.811560] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.812317] [ 30.812583] Freed by task 19: [ 30.813032] kasan_save_stack+0x22/0x50 [ 30.813618] kasan_set_track+0x25/0x30 [ 30.814200] kasan_save_free_info+0x2b/0x50 [ 30.814823] __kasan_slab_free+0x10a/0x190 [ 30.815440] kmem_cache_free+0x10d/0x4d0 [ 30.816035] rcu_core+0x8c8/0x2860 [ 30.816579] __do_softirq+0x1b7/0x7d4 [ 30.817142] [ 30.817394] Last potentially related work creation: [ 30.818080] kasan_save_stack+0x22/0x50 [ 30.818677] __kasan_record_aux_stack+0x8e/0xa0 [ 30.819349] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.820096] remove_vma+0x139/0x170 [ 30.820625] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.821269] do_vmi_munmap+0x1f1/0x2b0 [ 30.821841] __vm_munmap+0x138/0x3a0 [ 30.822386] __x64_sys_munmap+0x59/0x80 [ 30.822965] do_syscall_64+0x3f/0x90 [ 30.823523] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.824276] [ 30.824544] The buggy address belongs to the object at ffff88801a332740 [ 30.824544] which belongs to the cache vm_area_struct of size 168 [ 30.826264] The buggy address is located 88 bytes inside of [ 30.826264] freed 168-byte region [ffff88801a332740, ffff88801a3327e8) [ 30.827904] [ 30.828156] The buggy address belongs to the physical page: [ 30.828937] page:0000000028a53c98 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a332 [ 30.830227] memcg:ffff888009a22f01 [ 30.830729] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.831494] page_type: 0xffffffff() [ 30.832018] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.833104] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009a22f01 [ 30.834179] page dumped because: kasan: bad access detected [ 30.834958] [ 30.835208] Memory state around the buggy address: [ 30.835892] ffff88801a332680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.836911] ffff88801a332700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.837911] >ffff88801a332780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.838914] ^ [ 30.839488] ffff88801a332800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.840495] ffff88801a332880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.841501] ================================================================== [ 30.842781] Disabling lock debugging due to kernel taint [ 32.720908] BUG: Bad rss-counter state mm:00000000a07513ae type:MM_FILEPAGES val:33 [ 32.721660] BUG: Bad rss-counter state mm:00000000a07513ae type:MM_ANONPAGES val:22 [ 33.202585] BUG: Bad rss-counter state mm:000000009f3a4976 type:MM_FILEPAGES val:33 [ 33.204319] BUG: Bad rss-counter state mm:000000009f3a4976 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8656' (ECDSA) to the list of known hosts. 2023/06/20 22:21:11 fuzzer started 2023/06/20 22:21:11 dialing manager at localhost:36067 2023/06/20 22:21:11 checking machine... 2023/06/20 22:21:11 checking revisions... [ 33.916178] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:21:11 testing simple program... [ 33.971548] cgroup: Unknown subsys name 'net' [ 34.014351] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:21:11 Registers: info registers vcpu 0 RAX=0000000080010004 RBX=ffff88800f408000 RCX=0000000000000000 RDX=000000000001c062 RSI=ffffffff8219168b RDI=0000000000000007 RBP=ffff88800f408180 RSP=ffff88806ce09de8 R8 =0000000000000007 R9 =0000000000010000 R10=000000000001c062 R11=ffff88806ce09ff8 R12=000000000001c062 R13=ffff88800f40c4c8 R14=0000000000000000 R15=ffff88800f408008 RIP=ffffffff8219168f 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 00007f92c526d900 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=00007f92c58250b0 CR3=000000000f392000 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=0000000000000050 RBX=ffff88800f408000 RCX=0000000000000000 RDX=00000000000101f7 RSI=ffffffff8219168b RDI=0000000000000007 RBP=00000000000003e7 RSP=ffff88800fc7f7d8 R8 =0000000000000007 R9 =0000000000010000 R10=00000000000101f7 R11=0000000000000128 R12=00000000000101f7 R13=ffffed1001e81001 R14=ffffffff85a23960 R15=dffffc0000000000 RIP=ffffffff8219168f RFL=00000093 [--S-A-C] 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=00007fe1a542fef0 CR3=000000000d87c000 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=209125966b6b95ab714cf7236c5bbe0d XMM02=000000000011a048ec2efd57dc4c00df XMM03=0000000000120ed03cb97e19b4a34f42 XMM04=7996f41749a12c5600000000000ae988 XMM05=71c2328ab4991ed600000000001314b8 XMM06=c291bd5c70af25b90000000000130c28 XMM07=e042d86d42eb936e0000000000121150 XMM08=3cb97e19b4a34f42000000000011a0a8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000