syzkaller login: [ 30.947130] BUG: Bad rss-counter state mm:000000007d7851e1 type:MM_FILEPAGES val:33 [ 30.948584] BUG: Bad rss-counter state mm:000000007d7851e1 type:MM_ANONPAGES val:22 [ 31.101601] ================================================================== [ 31.102516] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.103457] Read of size 8 at addr ffff88800dfcf3f8 by task sshd/220 [ 31.104226] [ 31.104514] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.105417] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.106396] Call Trace: [ 31.106719] [ 31.107000] dump_stack_lvl+0x91/0xf0 [ 31.107485] print_report+0xcc/0x620 [ 31.107959] ? __virt_addr_valid+0x102/0x340 [ 31.108504] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.109122] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.109726] kasan_report+0xbe/0xf0 [ 31.110204] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.110826] vma_interval_tree_remove+0xc75/0xec0 [ 31.111440] vma_prepare+0xc54/0x11a0 [ 31.111920] __split_vma+0x5af/0x950 [ 31.112394] ? __pfx___split_vma+0x10/0x10 [ 31.112955] ? find_held_lock+0x2c/0x110 [ 31.113486] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.114045] ? lock_is_held_type+0x9f/0x120 [ 31.114593] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.115208] ? mtree_range_walk+0x632/0x900 [ 31.115758] ? mas_walk+0x5c7/0x7c0 [ 31.116239] do_vmi_munmap+0x1f1/0x2b0 [ 31.116729] mmap_region+0x1f9/0x2660 [ 31.117241] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.117751] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.118468] ? __pfx_lock_acquire+0x10/0x10 [ 31.118997] ? __pfx_mmap_region+0x10/0x10 [ 31.119540] ? security_mmap_addr+0x7d/0xa0 [ 31.120076] ? get_unmapped_area+0x1f5/0x3f0 [ 31.120641] do_mmap+0x854/0xf00 [ 31.121101] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.121593] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.122159] ksys_mmap_pgoff+0x3af/0x500 [ 31.122671] do_syscall_64+0x3f/0x90 [ 31.123143] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.123802] RIP: 0033:0x7fec057ced82 [ 31.124255] 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 [ 31.126391] RSP: 002b:00007ffface73078 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.127295] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fec057ced82 [ 31.128139] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fec04c08000 [ 31.129004] RBP: 00007fec04c08000 R08: 0000000000000009 R09: 0000000000001000 [ 31.129853] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cd5eb67ec0 [ 31.130689] R13: 00007ffface73090 R14: 00007ffface730c0 R15: 00007ffface73420 [ 31.131542] [ 31.131834] [ 31.132060] Allocated by task 213: [ 31.132495] kasan_save_stack+0x22/0x50 [ 31.133018] kasan_set_track+0x25/0x30 [ 31.133517] __kasan_slab_alloc+0x59/0x70 [ 31.134047] kmem_cache_alloc+0x16b/0x370 [ 31.134559] vm_area_dup+0x20/0x160 [ 31.135010] __split_vma+0x170/0x950 [ 31.135474] split_vma+0xc6/0x110 [ 31.135923] mprotect_fixup+0x8d2/0xb30 [ 31.136436] do_mprotect_pkey+0x87e/0xd40 [ 31.136969] __x64_sys_mprotect+0x78/0xc0 [ 31.137491] do_syscall_64+0x3f/0x90 [ 31.137971] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.138608] [ 31.138830] Freed by task 213: [ 31.139226] kasan_save_stack+0x22/0x50 [ 31.139730] kasan_set_track+0x25/0x30 [ 31.140228] kasan_save_free_info+0x2b/0x50 [ 31.140773] __kasan_slab_free+0x10a/0x190 [ 31.141308] kmem_cache_free+0x10d/0x4d0 [ 31.141821] rcu_core+0x8c8/0x2860 [ 31.142264] __do_softirq+0x1b7/0x7d4 [ 31.142753] [ 31.142973] Last potentially related work creation: [ 31.143555] kasan_save_stack+0x22/0x50 [ 31.144069] __kasan_record_aux_stack+0x8e/0xa0 [ 31.144642] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.145297] remove_vma+0x139/0x170 [ 31.145750] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.146311] do_vmi_munmap+0x1f1/0x2b0 [ 31.146799] __vm_munmap+0x138/0x3a0 [ 31.147271] __x64_sys_munmap+0x59/0x80 [ 31.147766] do_syscall_64+0x3f/0x90 [ 31.148245] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.148887] [ 31.149108] The buggy address belongs to the object at ffff88800dfcf3a0 [ 31.149108] which belongs to the cache vm_area_struct of size 168 [ 31.150577] The buggy address is located 88 bytes inside of [ 31.150577] freed 168-byte region [ffff88800dfcf3a0, ffff88800dfcf448) [ 31.151965] [ 31.152182] The buggy address belongs to the physical page: [ 31.152845] page:000000006e29113a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdfcf [ 31.153951] memcg:ffff88800d369701 [ 31.154375] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.155070] page_type: 0xffffffff() [ 31.155516] raw: 0100000000000200 ffff8880087a0c80 ffffea0000365980 dead000000000005 [ 31.156437] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d369701 [ 31.157348] page dumped because: kasan: bad access detected [ 31.158010] [ 31.158224] Memory state around the buggy address: [ 31.158811] ffff88800dfcf280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.159666] ffff88800dfcf300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.160512] >ffff88800dfcf380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.161385] ^ [ 31.162225] ffff88800dfcf400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.163075] ffff88800dfcf480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.163927] ================================================================== [ 31.164930] Disabling lock debugging due to kernel taint [ 33.514152] BUG: Bad rss-counter state mm:0000000075806751 type:MM_FILEPAGES val:33 [ 33.515317] BUG: Bad rss-counter state mm:0000000075806751 type:MM_ANONPAGES val:22 [ 33.904017] BUG: Bad rss-counter state mm:000000003ef94476 type:MM_FILEPAGES val:33 [ 33.905075] BUG: Bad rss-counter state mm:000000003ef94476 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46530' (ECDSA) to the list of known hosts. 2023/06/21 03:11:59 fuzzer started 2023/06/21 03:11:59 dialing manager at localhost:36067 2023/06/21 03:11:59 checking machine... 2023/06/21 03:11:59 checking revisions... [ 34.626366] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:11:59 testing simple program... [ 34.680919] cgroup: Unknown subsys name 'net' [ 34.724765] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:11:58 Registers: info registers vcpu 0 RAX=0e3bede41f0f3a0d RBX=00007ffd0774dc50 RCX=38f69de5ad1fc5af RDX=f80c3930ba95783c RSI=35da5ecb104962c8 RDI=00007ffd0774dc50 RBP=0800000000000000 RSP=00007ffd0774dc28 R8 =08f5dd3412a3b74a R9 =e6e566dd209e06bf R10=dfdbf81e10f511cc R11=00007ffd0774e0d0 R12=00000000000000e5 R13=00007ffd0774e0f0 R14=000000000000001e R15=0000000000000000 RIP=00007f8470e72999 RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f847037f900 00000000 00000000 GS =0000 0000000000000000 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=00007f846f77bb50 CR3=000000000f160000 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=4b2f843699f53aa2764c1eed011a8883 XMM02=eff9b2d0a8fce9cb000000000011a190 XMM03=2c67c8bc2e329bc3000000000011a2b8 XMM04=86bcf175419511e000000000000ae988 XMM05=99f10713cbff9ece0000000000132008 XMM06=4fda316b135da52b0000000000130a88 XMM07=fb795ef6d65770560000000000120d00 XMM08=2c67c8bc2e329bc3000000000011a2b8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f28be940618 CR3=000000001cda0000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000