syzkaller login: [ 100.303627] BUG: Bad rss-counter state mm:0000000071bfe030 type:MM_FILEPAGES val:33 [ 100.304236] BUG: Bad rss-counter state mm:0000000071bfe030 type:MM_ANONPAGES val:22 [ 100.493617] ================================================================== [ 100.494208] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 100.494804] Read of size 8 at addr ffff88800c736c20 by task sshd/223 [ 100.495285] [ 100.495428] CPU: 0 PID: 223 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 100.496076] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 100.500714] Call Trace: [ 100.500924] [ 100.501107] dump_stack_lvl+0x91/0xf0 [ 100.501423] print_report+0xcc/0x620 [ 100.501737] ? __virt_addr_valid+0x102/0x340 [ 100.502093] ? vma_interval_tree_remove+0xc75/0xec0 [ 100.502488] ? vma_interval_tree_remove+0xc75/0xec0 [ 100.502884] kasan_report+0xbe/0xf0 [ 100.503192] ? vma_interval_tree_remove+0xc75/0xec0 [ 100.503587] vma_interval_tree_remove+0xc75/0xec0 [ 100.503979] vma_prepare+0xc54/0x11a0 [ 100.504287] __split_vma+0x5af/0x950 [ 100.504629] ? __pfx___split_vma+0x10/0x10 [ 100.504973] ? find_held_lock+0x2c/0x110 [ 100.505308] do_vmi_align_munmap+0x2ba/0x11f0 [ 100.505669] ? lock_is_held_type+0x9f/0x120 [ 100.506014] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 100.506401] ? mtree_range_walk+0x632/0x900 [ 100.506758] ? mas_walk+0x5c7/0x7c0 [ 100.507064] do_vmi_munmap+0x1f1/0x2b0 [ 100.507380] mmap_region+0x1f9/0x2660 [ 100.507692] ? vm_mmap_pgoff+0x15c/0x3a0 [ 100.508023] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 100.508476] ? __pfx_lock_acquire+0x10/0x10 [ 100.508865] ? __pfx_mmap_region+0x10/0x10 [ 100.509212] ? security_mmap_addr+0x7d/0xa0 [ 100.509553] ? get_unmapped_area+0x1f5/0x3f0 [ 100.509904] do_mmap+0x854/0xf00 [ 100.510188] vm_mmap_pgoff+0x1a6/0x3a0 [ 100.510508] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 100.510869] ksys_mmap_pgoff+0x3af/0x500 [ 100.511194] do_syscall_64+0x3f/0x90 [ 100.511503] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 100.511920] RIP: 0033:0x7f79d3222d82 [ 100.512215] 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 [ 100.513565] RSP: 002b:00007fffd5e3d358 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 100.514138] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f79d3222d82 [ 100.514673] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f79d265c000 [ 100.515206] RBP: 00007f79d265c000 R08: 0000000000000009 R09: 0000000000001000 [ 100.515745] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557753479f60 [ 100.516284] R13: 00007fffd5e3d370 R14: 00007fffd5e3d3a0 R15: 00007fffd5e3d700 [ 100.516843] [ 100.517020] [ 100.517151] Allocated by task 214: [ 100.517398] kasan_save_stack+0x22/0x50 [ 100.517702] kasan_set_track+0x25/0x30 [ 100.517992] __kasan_slab_alloc+0x59/0x70 [ 100.518305] kmem_cache_alloc+0x16b/0x370 [ 100.518612] vm_area_dup+0x20/0x160 [ 100.518879] __split_vma+0x170/0x950 [ 100.519147] split_vma+0xc6/0x110 [ 100.519402] mprotect_fixup+0x8d2/0xb30 [ 100.519699] do_mprotect_pkey+0x87e/0xd40 [ 100.519999] __x64_sys_mprotect+0x78/0xc0 [ 100.520306] do_syscall_64+0x3f/0x90 [ 100.520631] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 100.521044] [ 100.521183] Freed by task 19: [ 100.521426] kasan_save_stack+0x22/0x50 [ 100.521771] kasan_set_track+0x25/0x30 [ 100.522086] kasan_save_free_info+0x2b/0x50 [ 100.522424] __kasan_slab_free+0x10a/0x190 [ 100.522767] kmem_cache_free+0x10d/0x4d0 [ 100.523092] rcu_core+0x8c8/0x2860 [ 100.523376] __do_softirq+0x1b7/0x7d4 [ 100.523680] [ 100.523819] Last potentially related work creation: [ 100.524188] kasan_save_stack+0x22/0x50 [ 100.524534] __kasan_record_aux_stack+0x8e/0xa0 [ 100.524907] __call_rcu_common.constprop.0+0x6a/0xb90 [ 100.525317] remove_vma+0x139/0x170 [ 100.525606] do_vmi_align_munmap+0xd4a/0x11f0 [ 100.525961] do_vmi_munmap+0x1f1/0x2b0 [ 100.526271] __vm_munmap+0x138/0x3a0 [ 100.526572] __x64_sys_munmap+0x59/0x80 [ 100.526891] do_syscall_64+0x3f/0x90 [ 100.527194] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 100.527601] [ 100.527741] The buggy address belongs to the object at ffff88800c736bc8 [ 100.527741] which belongs to the cache vm_area_struct of size 168 [ 100.528691] The buggy address is located 88 bytes inside of [ 100.528691] freed 168-byte region [ffff88800c736bc8, ffff88800c736c70) [ 100.529579] [ 100.529719] The buggy address belongs to the physical page: [ 100.530135] page:00000000227cbfb4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc736 [ 100.530816] memcg:ffff888009805601 [ 100.531087] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 100.531529] page_type: 0xffffffff() [ 100.531820] raw: 0100000000000200 ffff88800879fc80 ffffea000031a000 0000000000000005 [ 100.532403] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009805601 [ 100.533005] page dumped because: kasan: bad access detected [ 100.533422] [ 100.533561] Memory state around the buggy address: [ 100.533928] ffff88800c736b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 100.534470] ffff88800c736b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 100.535036] >ffff88800c736c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 100.535572] ^ [ 100.535907] ffff88800c736c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 100.536445] ffff88800c736d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 100.537020] ================================================================== [ 100.538035] Disabling lock debugging due to kernel taint [ 102.680602] BUG: Bad rss-counter state mm:0000000049336273 type:MM_FILEPAGES val:33 [ 102.681353] BUG: Bad rss-counter state mm:0000000049336273 type:MM_ANONPAGES val:22 [ 104.568907] BUG: Bad rss-counter state mm:00000000cbc53212 type:MM_FILEPAGES val:33 [ 104.569518] BUG: Bad rss-counter state mm:00000000cbc53212 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44623' (ECDSA) to the list of known hosts. 2023/06/20 10:03:06 fuzzer started 2023/06/20 10:03:06 dialing manager at localhost:44161 2023/06/20 10:03:06 checking machine... 2023/06/20 10:03:06 checking revisions... [ 105.427096] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:03:06 testing simple program... [ 105.489353] cgroup: Unknown subsys name 'net' [ 105.549964] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:01:56 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007f70735695c0 CR3=000000000da9e000 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=bfb4e51651fe859f724d790c43236947 XMM02=ec2efd57dc4c00df000000000012f7f8 XMM03=a7e56cade9ca988e000000000012f8c8 XMM04=9f9f9fd0fd7cd24f00000000000ae988 XMM05=1790d0af6686a2b300000000001443f0 XMM06=e4cb8bb95a7664b60000000000143318 XMM07=139997807ff5a4420000000000134f40 XMM08=e1353cc91df538a700000000001344f8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0f6f6e8 RBX=0000000000000001 RCX=0000000000000000 RDX=dffffc0000000000 RSI=ffffffff8114320f RDI=0000000000000006 RBP=000000000fc6e208 RSP=ffff88801a006fe8 R8 =0000000000000006 R9 =0000000000000000 R10=0000000000000800 R11=ffff88800eba3e1c R12=0000000000000000 R13=0000000000000800 R14=ffff88801a007e70 R15=ffff88801a0071f8 RIP=ffffffff81143228 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 00007f9d77d1c900 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=00007f9d77cb9008 CR3=000000001a140000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000