syzkaller login: [ 51.679462] BUG: Bad rss-counter state mm:00000000f36441a1 type:MM_FILEPAGES val:33 [ 51.680882] BUG: Bad rss-counter state mm:00000000f36441a1 type:MM_ANONPAGES val:22 [ 51.855714] ================================================================== [ 51.856624] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 51.857573] Read of size 8 at addr ffff88800e42f140 by task sshd/221 [ 51.858556] [ 51.858789] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 51.859669] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 51.860656] Call Trace: [ 51.860984] [ 51.861272] dump_stack_lvl+0x91/0xf0 [ 51.861810] print_report+0xcc/0x620 [ 51.862315] ? __virt_addr_valid+0x102/0x340 [ 51.862888] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.863518] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.864144] kasan_report+0xbe/0xf0 [ 51.864657] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.865330] vma_interval_tree_remove+0xc75/0xec0 [ 51.866002] vma_prepare+0xc54/0x11a0 [ 51.866525] __split_vma+0x5af/0x950 [ 51.867038] ? __pfx___split_vma+0x10/0x10 [ 51.867614] ? find_held_lock+0x2c/0x110 [ 51.868178] do_vmi_align_munmap+0x2ba/0x11f0 [ 51.868800] ? lock_is_held_type+0x9f/0x120 [ 51.869387] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 51.870073] ? mtree_range_walk+0x632/0x900 [ 51.870679] ? mas_walk+0x5c7/0x7c0 [ 51.871195] do_vmi_munmap+0x1f1/0x2b0 [ 51.871732] mmap_region+0x1f9/0x2660 [ 51.872248] ? vm_mmap_pgoff+0x15c/0x3a0 [ 51.872812] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 51.873615] ? __pfx_lock_acquire+0x10/0x10 [ 51.874197] ? __pfx_mmap_region+0x10/0x10 [ 51.874775] ? security_mmap_addr+0x7d/0xa0 [ 51.875354] ? get_unmapped_area+0x1f5/0x3f0 [ 51.875949] do_mmap+0x854/0xf00 [ 51.876418] vm_mmap_pgoff+0x1a6/0x3a0 [ 51.876957] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 51.877586] ksys_mmap_pgoff+0x3af/0x500 [ 51.878139] do_syscall_64+0x3f/0x90 [ 51.878655] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.879344] RIP: 0033:0x7f8d01980d82 [ 51.879838] 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 [ 51.882554] RSP: 002b:00007ffcfd05aef8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 51.883742] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8d01980d82 [ 51.884846] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8d00dba000 [ 51.885959] RBP: 00007f8d00dba000 R08: 0000000000000009 R09: 0000000000001000 [ 51.887084] R10: 0000000000000812 R11: 0000000000000206 R12: 000055806f995f70 [ 51.888198] R13: 00007ffcfd05af10 R14: 00007ffcfd05af40 R15: 00007ffcfd05b2a0 [ 51.889322] [ 51.889701] [ 51.889985] Allocated by task 214: [ 51.890536] kasan_save_stack+0x22/0x50 [ 51.891177] kasan_set_track+0x25/0x30 [ 51.891808] __kasan_slab_alloc+0x59/0x70 [ 51.892479] kmem_cache_alloc+0x16b/0x370 [ 51.893143] vm_area_dup+0x20/0x160 [ 51.893816] __split_vma+0x170/0x950 [ 51.894422] split_vma+0xc6/0x110 [ 51.894963] mprotect_fixup+0x8d2/0xb30 [ 51.895576] do_mprotect_pkey+0x87e/0xd40 [ 51.896218] __x64_sys_mprotect+0x78/0xc0 [ 51.896861] do_syscall_64+0x3f/0x90 [ 51.897466] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.898259] [ 51.898497] Freed by task 214: [ 51.898887] kasan_save_stack+0x22/0x50 [ 51.899390] kasan_set_track+0x25/0x30 [ 51.899945] kasan_save_free_info+0x2b/0x50 [ 51.900494] __kasan_slab_free+0x10a/0x190 [ 51.901031] kmem_cache_free+0x10d/0x4d0 [ 51.901541] rcu_core+0x8c8/0x2860 [ 51.902001] __do_softirq+0x1b7/0x7d4 [ 51.902478] [ 51.902694] Last potentially related work creation: [ 51.903287] kasan_save_stack+0x22/0x50 [ 51.903799] __kasan_record_aux_stack+0x8e/0xa0 [ 51.904375] __call_rcu_common.constprop.0+0x6a/0xb90 [ 51.905023] remove_vma+0x139/0x170 [ 51.905476] do_vmi_align_munmap+0xd4a/0x11f0 [ 51.906040] do_vmi_munmap+0x1f1/0x2b0 [ 51.906519] __vm_munmap+0x138/0x3a0 [ 51.906981] __x64_sys_munmap+0x59/0x80 [ 51.907474] do_syscall_64+0x3f/0x90 [ 51.907943] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.908585] [ 51.908797] The buggy address belongs to the object at ffff88800e42f0e8 [ 51.908797] which belongs to the cache vm_area_struct of size 168 [ 51.910288] The buggy address is located 88 bytes inside of [ 51.910288] freed 168-byte region [ffff88800e42f0e8, ffff88800e42f190) [ 51.911697] [ 51.911913] The buggy address belongs to the physical page: [ 51.912570] page:000000002b7b7239 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe42f [ 51.913660] memcg:ffff88800d42ac01 [ 51.914085] flags: 0x100000000000200(slab|node=0|zone=1) [ 51.914737] page_type: 0xffffffff() [ 51.915189] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 51.916107] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d42ac01 [ 51.917010] page dumped because: kasan: bad access detected [ 51.917685] [ 51.917900] Memory state around the buggy address: [ 51.918473] ffff88800e42f000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 51.919331] ffff88800e42f080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 51.920173] >ffff88800e42f100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 51.921018] ^ [ 51.921659] ffff88800e42f180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 51.922516] ffff88800e42f200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 51.923359] ================================================================== [ 51.924285] Disabling lock debugging due to kernel taint [ 53.852040] BUG: Bad rss-counter state mm:00000000a3f88779 type:MM_FILEPAGES val:33 [ 53.853289] BUG: Bad rss-counter state mm:00000000a3f88779 type:MM_ANONPAGES val:22 [ 54.363525] BUG: Bad rss-counter state mm:000000007cdf4214 type:MM_FILEPAGES val:33 [ 54.364524] BUG: Bad rss-counter state mm:000000007cdf4214 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50714' (ECDSA) to the list of known hosts. 2023/06/19 19:20:10 fuzzer started 2023/06/19 19:20:11 dialing manager at localhost:44161 2023/06/19 19:20:11 checking machine... 2023/06/19 19:20:11 checking revisions... [ 55.078680] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:20:11 testing simple program... [ 55.132994] cgroup: Unknown subsys name 'net' [ 55.183971] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:19:50 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff864bd3c2 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff864bd3c6 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b5420 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff81130ad6 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 0000000000000000 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=00007f41ee26f710 CR3=00000000147da000 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=2030313a30323a3931203931206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030313a30323a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=000000000000000e RDI=ffffffff849f03c0 RBP=ffffffff849f03c0 RSP=ffff88800d89fac0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=000000000000000e R13=ffff88800d89fb70 R14=ffff888015dcb680 R15=ffff88800d89fc58 RIP=ffffffff8122e3db 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 00007f259d83b900 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=00007f95cae39650 CR3=00000000145ae000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=e348f70619fc171500000000000ae988 XMM05=d11f0062a2d32cfb0000000000135e08 XMM06=c291bd5c70af25b90000000000134bf8 XMM07=fb795ef6d65770560000000000125170 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000