syzkaller login: [ 31.701164] BUG: Bad rss-counter state mm:00000000c40898da type:MM_FILEPAGES val:33 [ 31.702484] BUG: Bad rss-counter state mm:00000000c40898da type:MM_ANONPAGES val:22 [ 31.740382] ================================================================== [ 31.741350] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.742290] Read of size 8 at addr ffff8880168f5140 by task sshd/220 [ 31.743054] [ 31.743275] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.744167] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.745146] Call Trace: [ 31.745471] [ 31.745755] dump_stack_lvl+0x91/0xf0 [ 31.746248] print_report+0xcc/0x620 [ 31.746739] ? __virt_addr_valid+0x102/0x340 [ 31.747295] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.747915] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.748541] kasan_report+0xbe/0xf0 [ 31.749015] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.749637] vma_interval_tree_remove+0xc75/0xec0 [ 31.750240] vma_prepare+0xc54/0x11a0 [ 31.750723] __split_vma+0x5af/0x950 [ 31.751201] ? __pfx___split_vma+0x10/0x10 [ 31.751751] ? find_held_lock+0x2c/0x110 [ 31.752293] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.752863] ? lock_is_held_type+0x9f/0x120 [ 31.753405] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.754023] ? mtree_range_walk+0x632/0x900 [ 31.754583] ? mas_walk+0x5c7/0x7c0 [ 31.755068] do_vmi_munmap+0x1f1/0x2b0 [ 31.755565] mmap_region+0x1f9/0x2660 [ 31.756068] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.756587] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.757317] ? __pfx_lock_acquire+0x10/0x10 [ 31.757858] ? __pfx_mmap_region+0x10/0x10 [ 31.758389] ? security_mmap_addr+0x7d/0xa0 [ 31.758927] ? get_unmapped_area+0x1f5/0x3f0 [ 31.759493] do_mmap+0x854/0xf00 [ 31.759941] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.760457] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.761022] ksys_mmap_pgoff+0x3af/0x500 [ 31.761542] do_syscall_64+0x3f/0x90 [ 31.762027] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.762685] RIP: 0033:0x7f9aa9102d82 [ 31.763149] 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 [ 31.765360] RSP: 002b:00007ffdf60d6d68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.766304] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9aa9102d82 [ 31.767192] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9aa853c000 [ 31.768094] RBP: 00007f9aa853c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.769078] R10: 0000000000000812 R11: 0000000000000206 R12: 000055daa963dec0 [ 31.769968] R13: 00007ffdf60d6d80 R14: 00007ffdf60d6db0 R15: 00007ffdf60d7110 [ 31.770885] [ 31.771194] [ 31.771415] Allocated by task 213: [ 31.771847] kasan_save_stack+0x22/0x50 [ 31.772382] kasan_set_track+0x25/0x30 [ 31.772888] __kasan_slab_alloc+0x59/0x70 [ 31.773425] kmem_cache_alloc+0x16b/0x370 [ 31.773944] vm_area_dup+0x20/0x160 [ 31.774400] __split_vma+0x170/0x950 [ 31.774886] split_vma+0xc6/0x110 [ 31.775356] mprotect_fixup+0x8d2/0xb30 [ 31.775881] do_mprotect_pkey+0x87e/0xd40 [ 31.776433] __x64_sys_mprotect+0x78/0xc0 [ 31.776978] do_syscall_64+0x3f/0x90 [ 31.777483] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.778128] [ 31.778342] Freed by task 203: [ 31.778734] kasan_save_stack+0x22/0x50 [ 31.779240] kasan_set_track+0x25/0x30 [ 31.779735] kasan_save_free_info+0x2b/0x50 [ 31.780272] __kasan_slab_free+0x10a/0x190 [ 31.780802] kmem_cache_free+0x10d/0x4d0 [ 31.781311] rcu_core+0x8c8/0x2860 [ 31.781753] __do_softirq+0x1b7/0x7d4 [ 31.782251] [ 31.782495] Last potentially related work creation: [ 31.783080] kasan_save_stack+0x22/0x50 [ 31.783594] __kasan_record_aux_stack+0x8e/0xa0 [ 31.784206] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.784853] remove_vma+0x139/0x170 [ 31.785299] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.785856] do_vmi_munmap+0x1f1/0x2b0 [ 31.786345] __vm_munmap+0x138/0x3a0 [ 31.786811] __x64_sys_munmap+0x59/0x80 [ 31.787304] do_syscall_64+0x3f/0x90 [ 31.787779] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.788430] [ 31.788646] The buggy address belongs to the object at ffff8880168f50e8 [ 31.788646] which belongs to the cache vm_area_struct of size 168 [ 31.790110] The buggy address is located 88 bytes inside of [ 31.790110] freed 168-byte region [ffff8880168f50e8, ffff8880168f5190) [ 31.791507] [ 31.791728] The buggy address belongs to the physical page: [ 31.792407] page:000000005abccf53 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x168f5 [ 31.793506] memcg:ffff88800e3ad501 [ 31.793931] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.794573] page_type: 0xffffffff() [ 31.795025] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.795940] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e3ad501 [ 31.796854] page dumped because: kasan: bad access detected [ 31.797519] [ 31.797734] Memory state around the buggy address: [ 31.798317] ffff8880168f5000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.799168] ffff8880168f5080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.800039] >ffff8880168f5100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.800893] ^ [ 31.801541] ffff8880168f5180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.802399] ffff8880168f5200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.803247] ================================================================== [ 31.804385] Disabling lock debugging due to kernel taint [ 34.488407] BUG: Bad rss-counter state mm:00000000176e9f95 type:MM_FILEPAGES val:33 [ 34.489659] BUG: Bad rss-counter state mm:00000000176e9f95 type:MM_ANONPAGES val:22 [ 34.942592] BUG: Bad rss-counter state mm:000000007446b026 type:MM_FILEPAGES val:33 [ 34.943661] BUG: Bad rss-counter state mm:000000007446b026 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45183' (ECDSA) to the list of known hosts. 2023/06/21 01:21:56 fuzzer started 2023/06/21 01:21:56 dialing manager at localhost:36067 2023/06/21 01:21:56 checking machine... 2023/06/21 01:21:56 checking revisions... [ 35.671173] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:21:57 testing simple program... [ 35.710359] cgroup: Unknown subsys name 'net' [ 35.759159] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:21:56 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffed1002866f99 RCX=0000000000000002 RDX=ffff88801421b680 RSI=ffffc90000685048 RDI=ffff888014337d78 RBP=ffffc90000685048 RSP=ffff888014337cc8 R8 =0000000000000004 R9 =000000007fff0000 R10=000000007fff0000 R11=0000000000000000 R12=ffff888014337e30 R13=dffffc0000000000 R14=ffff888014337e30 R15=ffffc90000685000 RIP=ffffffff815ab1ce RFL=00000246 [---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 00007f23d5c9c900 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=00007f23d51226e0 CR3=000000000c788000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=ea6bb8c44bb64f6400000000000ae988 XMM05=67100c31f11c807c0000000000132878 XMM06=19e9129bd510f23500000000001319e0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800f11f6a8 RCX=0000000000000001 RDX=1ffff11001e23ed6 RSI=ffff88800f11f678 RDI=ffff88800f11f6b0 RBP=ffff88800f11f678 RSP=ffff88800f11f5b0 R8 =0000000000000001 R9 =ffff88800f11f6e8 R10=0000000000038001 R11=0000000000006097 R12=0000000000000008 R13=ffff88800f11f6f0 R14=ffff88800f11f678 R15=ffff88800f11f6a8 RIP=ffffffff81130445 RFL=00000246 [---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 00007f3e20dc0900 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=00007ffe26786000 CR3=000000000951a000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000