syzkaller login: [ 38.021498] BUG: Bad rss-counter state mm:000000005cd915ba type:MM_FILEPAGES val:33 [ 38.022594] BUG: Bad rss-counter state mm:000000005cd915ba type:MM_ANONPAGES val:22 [ 38.164207] ================================================================== [ 38.165191] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.166248] Read of size 8 at addr ffff88801a2a16b0 by task sshd/220 [ 38.167090] [ 38.167419] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.168374] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.169494] Call Trace: [ 38.169848] <TASK> [ 38.170168] dump_stack_lvl+0x91/0xf0 [ 38.170718] print_report+0xcc/0x620 [ 38.171261] ? __virt_addr_valid+0x102/0x340 [ 38.171871] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.172544] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.173221] kasan_report+0xbe/0xf0 [ 38.173768] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.174465] vma_interval_tree_remove+0xc75/0xec0 [ 38.175148] vma_prepare+0xc54/0x11a0 [ 38.175702] __split_vma+0x5af/0x950 [ 38.176242] ? __pfx___split_vma+0x10/0x10 [ 38.176845] ? find_held_lock+0x2c/0x110 [ 38.177453] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.178097] ? lock_is_held_type+0x9f/0x120 [ 38.178702] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.179390] ? mtree_range_walk+0x632/0x900 [ 38.180011] ? mas_walk+0x5c7/0x7c0 [ 38.180546] do_vmi_munmap+0x1f1/0x2b0 [ 38.181104] mmap_region+0x1f9/0x2660 [ 38.181668] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.182250] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.183064] ? __pfx_lock_acquire+0x10/0x10 [ 38.183675] ? __pfx_mmap_region+0x10/0x10 [ 38.184283] ? security_mmap_addr+0x7d/0xa0 [ 38.184891] ? get_unmapped_area+0x1f5/0x3f0 [ 38.185550] do_mmap+0x854/0xf00 [ 38.186049] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.186613] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.187253] ksys_mmap_pgoff+0x3af/0x500 [ 38.187832] do_syscall_64+0x3f/0x90 [ 38.188377] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.189113] RIP: 0033:0x7f21ed623d82 [ 38.189639] 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 [ 38.192099] RSP: 002b:00007ffed45a1a48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.193141] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f21ed623d82 [ 38.194134] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f21eca5d000 [ 38.195149] RBP: 00007f21eca5d000 R08: 0000000000000009 R09: 0000000000001000 [ 38.196239] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a602f34980 [ 38.197199] R13: 00007ffed45a1a60 R14: 00007ffed45a1a90 R15: 00007ffed45a1df0 [ 38.198182] </TASK> [ 38.198515] [ 38.198761] Allocated by task 213: [ 38.199254] kasan_save_stack+0x22/0x50 [ 38.199828] kasan_set_track+0x25/0x30 [ 38.200388] __kasan_slab_alloc+0x59/0x70 [ 38.200978] kmem_cache_alloc+0x16b/0x370 [ 38.201569] vm_area_dup+0x20/0x160 [ 38.202092] __split_vma+0x170/0x950 [ 38.202622] split_vma+0xc6/0x110 [ 38.203124] mprotect_fixup+0x8d2/0xb30 [ 38.203703] do_mprotect_pkey+0x87e/0xd40 [ 38.204300] __x64_sys_mprotect+0x78/0xc0 [ 38.204896] do_syscall_64+0x3f/0x90 [ 38.205443] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.206169] [ 38.206413] Freed by task 203: [ 38.206860] kasan_save_stack+0x22/0x50 [ 38.207435] kasan_set_track+0x25/0x30 [ 38.208003] kasan_save_free_info+0x2b/0x50 [ 38.208608] __kasan_slab_free+0x10a/0x190 [ 38.209219] kmem_cache_free+0x10d/0x4d0 [ 38.209830] rcu_core+0x8c8/0x2860 [ 38.210343] __do_softirq+0x1b7/0x7d4 [ 38.210889] [ 38.211137] Last potentially related work creation: [ 38.211807] kasan_save_stack+0x22/0x50 [ 38.212385] __kasan_record_aux_stack+0x8e/0xa0 [ 38.213042] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.213797] remove_vma+0x139/0x170 [ 38.214329] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.214980] do_vmi_munmap+0x1f1/0x2b0 [ 38.215541] __vm_munmap+0x138/0x3a0 [ 38.216074] __x64_sys_munmap+0x59/0x80 [ 38.216646] do_syscall_64+0x3f/0x90 [ 38.217193] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.217939] [ 38.218190] The buggy address belongs to the object at ffff88801a2a1658 [ 38.218190] which belongs to the cache vm_area_struct of size 168 [ 38.219904] The buggy address is located 88 bytes inside of [ 38.219904] freed 168-byte region [ffff88801a2a1658, ffff88801a2a1700) [ 38.221559] [ 38.221811] The buggy address belongs to the physical page: [ 38.222562] page:00000000a1a77be6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a2a1 [ 38.223819] memcg:ffff888019e70401 [ 38.224307] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.225047] page_type: 0xffffffff() [ 38.225574] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 38.226628] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019e70401 [ 38.227677] page dumped because: kasan: bad access detected [ 38.228436] [ 38.228671] Memory state around the buggy address: [ 38.229261] ffff88801a2a1580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.230131] ffff88801a2a1600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 38.230993] >ffff88801a2a1680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.231849] ^ [ 38.232439] ffff88801a2a1700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 38.233305] ffff88801a2a1780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.234172] ================================================================== [ 38.235155] Disabling lock debugging due to kernel taint [ 39.926269] BUG: Bad rss-counter state mm:00000000f9147eb5 type:MM_FILEPAGES val:33 [ 39.926987] BUG: Bad rss-counter state mm:00000000f9147eb5 type:MM_ANONPAGES val:22 [ 40.376072] BUG: Bad rss-counter state mm:0000000059289440 type:MM_FILEPAGES val:33 [ 40.377301] BUG: Bad rss-counter state mm:0000000059289440 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11160' (ECDSA) to the list of known hosts. 2023/06/20 05:22:38 fuzzer started 2023/06/20 05:22:39 dialing manager at localhost:44161 2023/06/20 05:22:39 checking machine... 2023/06/20 05:22:39 checking revisions... [ 41.059356] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:22:39 testing simple program... [ 41.098697] cgroup: Unknown subsys name 'net' [ 41.152473] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:22:31 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880103776e0 RCX=ffffffff860d68f6 RDX=1ffff1100206eeb6 RSI=0000000000000000 RDI=ffff8880103775b0 RBP=ffff888010377600 RSP=ffff888010377538 R8 =ffffffff860d68fa R9 =ffff8880103775e8 R10=0000000000038001 R11=0000000000010b7e R12=ffff888010377608 R13=ffff8880103775f0 R14=ffff8880103776e0 R15=ffff8880103775a8 RIP=ffffffff81131c83 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 00007fe72976c900 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=00007fe728b80ae0 CR3=0000000008ed4000 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=555e4adb35431c866944bf9c6caa95ab XMM02=ec2efd57dc4c00df000000000011d0b8 XMM03=5af2b049f974582d000000000011d188 XMM04=8223043665f86ff900000000000ae988 XMM05=f2b3254a69b61b700000000000135258 XMM06=4fda316b135da52b0000000000134048 XMM07=fb795ef6d657705600000000001245c8 XMM08=2c67c8bc2e329bc3000000000011d128 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=ffff888015e89b40 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffff88800d421640 RSP=ffff88800fdd7b30 R8 =0000000000000006 R9 =000000000000231c R10=0000000000000024 R11=0000000000000000 R12=0000000000000024 R13=0000000000000000 R14=ffff88800fdd7d90 R15=0000000000000024 RIP=ffffffff8180fd24 RFL=00000256 [---ZAP-] 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 00007fdd04860900 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=00007fffc2f43000 CR3=000000000ee02000 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