syzkaller login: [ 31.153616] BUG: Bad rss-counter state mm:00000000ac6c21c4 type:MM_FILEPAGES val:33 [ 31.154833] BUG: Bad rss-counter state mm:00000000ac6c21c4 type:MM_ANONPAGES val:22 [ 31.193344] ================================================================== [ 31.194295] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.195300] Read of size 8 at addr ffff88800dd35228 by task sshd/219 [ 31.196056] [ 31.196291] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.197143] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.198129] Call Trace: [ 31.198449] <TASK> [ 31.198733] dump_stack_lvl+0x91/0xf0 [ 31.199228] print_report+0xcc/0x620 [ 31.199711] ? __virt_addr_valid+0x102/0x340 [ 31.200292] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.200904] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.201522] kasan_report+0xbe/0xf0 [ 31.201999] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.202614] vma_interval_tree_remove+0xc75/0xec0 [ 31.203217] vma_prepare+0xc54/0x11a0 [ 31.203694] __split_vma+0x5af/0x950 [ 31.204179] ? __pfx___split_vma+0x10/0x10 [ 31.204712] ? find_held_lock+0x2c/0x110 [ 31.205236] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.205799] ? lock_is_held_type+0x9f/0x120 [ 31.206336] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.206941] ? mtree_range_walk+0x632/0x900 [ 31.207494] ? mas_walk+0x5c7/0x7c0 [ 31.207974] do_vmi_munmap+0x1f1/0x2b0 [ 31.208480] mmap_region+0x1f9/0x2660 [ 31.208964] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.209475] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.210194] ? __pfx_lock_acquire+0x10/0x10 [ 31.210722] ? __pfx_mmap_region+0x10/0x10 [ 31.211250] ? security_mmap_addr+0x7d/0xa0 [ 31.211779] ? get_unmapped_area+0x1f5/0x3f0 [ 31.212356] do_mmap+0x854/0xf00 [ 31.212800] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.213306] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.213886] ksys_mmap_pgoff+0x3af/0x500 [ 31.214395] do_syscall_64+0x3f/0x90 [ 31.214878] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.215523] RIP: 0033:0x7faea5026d82 [ 31.215996] 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 [ 31.218126] RSP: 002b:00007ffe87f2b388 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.219018] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faea5026d82 [ 31.219860] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faea4460000 [ 31.220710] RBP: 00007faea4460000 R08: 0000000000000009 R09: 0000000000001000 [ 31.221557] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559a69e75f70 [ 31.222409] R13: 00007ffe87f2b3a0 R14: 00007ffe87f2b3d0 R15: 00007ffe87f2b730 [ 31.223255] </TASK> [ 31.223548] [ 31.223764] Allocated by task 212: [ 31.224204] kasan_save_stack+0x22/0x50 [ 31.224709] kasan_set_track+0x25/0x30 [ 31.225205] __kasan_slab_alloc+0x59/0x70 [ 31.225728] kmem_cache_alloc+0x16b/0x370 [ 31.226245] vm_area_dup+0x20/0x160 [ 31.226704] __split_vma+0x170/0x950 [ 31.227173] split_vma+0xc6/0x110 [ 31.227609] mprotect_fixup+0x8d2/0xb30 [ 31.228117] do_mprotect_pkey+0x87e/0xd40 [ 31.228649] __x64_sys_mprotect+0x78/0xc0 [ 31.229170] do_syscall_64+0x3f/0x90 [ 31.229642] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.230287] [ 31.230503] Freed by task 212: [ 31.230895] kasan_save_stack+0x22/0x50 [ 31.231402] kasan_set_track+0x25/0x30 [ 31.231900] kasan_save_free_info+0x2b/0x50 [ 31.232442] __kasan_slab_free+0x10a/0x190 [ 31.232997] kmem_cache_free+0x10d/0x4d0 [ 31.233515] rcu_core+0x8c8/0x2860 [ 31.233975] __do_softirq+0x1b7/0x7d4 [ 31.234449] [ 31.234668] Last potentially related work creation: [ 31.235255] kasan_save_stack+0x22/0x50 [ 31.235760] __kasan_record_aux_stack+0x8e/0xa0 [ 31.236357] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.237002] remove_vma+0x139/0x170 [ 31.237455] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.238010] do_vmi_munmap+0x1f1/0x2b0 [ 31.238496] __vm_munmap+0x138/0x3a0 [ 31.238968] __x64_sys_munmap+0x59/0x80 [ 31.239460] do_syscall_64+0x3f/0x90 [ 31.239937] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.240589] [ 31.240805] Second to last potentially related work creation: [ 31.241491] kasan_save_stack+0x22/0x50 [ 31.241998] __kasan_record_aux_stack+0x8e/0xa0 [ 31.242570] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.243209] remove_vma+0x139/0x170 [ 31.243662] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.244247] do_vmi_munmap+0x1f1/0x2b0 [ 31.244739] mmap_region+0x1f9/0x2660 [ 31.245217] do_mmap+0x854/0xf00 [ 31.245654] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.246139] ksys_mmap_pgoff+0x3af/0x500 [ 31.246647] do_syscall_64+0x3f/0x90 [ 31.247118] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.247769] [ 31.247987] The buggy address belongs to the object at ffff88800dd351d0 [ 31.247987] which belongs to the cache vm_area_struct of size 168 [ 31.249469] The buggy address is located 88 bytes inside of [ 31.249469] freed 168-byte region [ffff88800dd351d0, ffff88800dd35278) [ 31.250867] [ 31.251083] The buggy address belongs to the physical page: [ 31.251745] page:0000000008242020 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd35 [ 31.252834] memcg:ffff88800e014d01 [ 31.253261] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.253903] page_type: 0xffffffff() [ 31.254360] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.255284] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e014d01 [ 31.256223] page dumped because: kasan: bad access detected [ 31.256888] [ 31.257106] Memory state around the buggy address: [ 31.257698] ffff88800dd35100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.258570] ffff88800dd35180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.259429] >ffff88800dd35200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.260298] ^ [ 31.260862] ffff88800dd35280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.261723] ffff88800dd35300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.262565] ================================================================== [ 31.263602] Disabling lock debugging due to kernel taint [ 33.510546] BUG: Bad rss-counter state mm:000000007267027c type:MM_FILEPAGES val:33 [ 33.511354] BUG: Bad rss-counter state mm:000000007267027c type:MM_ANONPAGES val:22 [ 33.939814] BUG: Bad rss-counter state mm:000000004eac2228 type:MM_FILEPAGES val:33 [ 33.940581] BUG: Bad rss-counter state mm:000000004eac2228 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55971' (ECDSA) to the list of known hosts. 2023/06/21 05:34:06 fuzzer started 2023/06/21 05:34:06 dialing manager at localhost:36067 2023/06/21 05:34:06 checking machine... 2023/06/21 05:34:06 checking revisions... [ 34.727246] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:34:07 testing simple program... [ 34.768880] cgroup: Unknown subsys name 'net' [ 34.826388] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:34:06 Registers: info registers vcpu 0 RAX=ffffffff818080db RBX=ffff88800ee17a80 RCX=0000000000000001 RDX=1ffff11001dc2f5b RSI=ffff88800ee17cd0 RDI=ffffffff818080db RBP=ffff88800ee17ad8 RSP=ffff88800ee17a68 R8 =0000000000000001 R9 =ffff88800ee17ac0 R10=0000000000038001 R11=0000000000021eef R12=ffff88800ee17b48 R13=0000000000000000 R14=ffff88800fa0d1c0 R15=ffff88800e4a24c0 RIP=ffffffff811303b8 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 00007f6c37e91900 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=00007f6c38448618 CR3=000000000e8bc000 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=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 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=0000000000000001 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=00007f017e683b80 CR3=000000000b98a000 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=16ecf6b156a0189c2c40336a461ceb8d XMM02=000000000011a188eff9b2d0a8fce9cb XMM03=000000000011a2582c67c8bc2e329bc3 XMM04=c945f9b7dcfdd4da00000000000ae988 XMM05=4a2f2ee5a935cf590000000000132d68 XMM06=806171799158d9670000000000132090 XMM07=e042d86d42eb936e0000000000121358 XMM08=20e65fd5fb7fe03e000000000011a258 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000