syzkaller login: [ 31.604967] BUG: Bad rss-counter state mm:000000007408e668 type:MM_FILEPAGES val:33 [ 31.606063] BUG: Bad rss-counter state mm:000000007408e668 type:MM_ANONPAGES val:22 [ 31.656541] ================================================================== [ 31.657798] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.658962] Read of size 8 at addr ffff888016625c20 by task sshd/220 [ 31.659738] [ 31.659971] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.660855] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.661857] Call Trace: [ 31.662179] [ 31.662486] dump_stack_lvl+0x91/0xf0 [ 31.662977] print_report+0xcc/0x620 [ 31.663484] ? __virt_addr_valid+0x102/0x340 [ 31.664055] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.664684] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.665316] kasan_report+0xbe/0xf0 [ 31.665805] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.666446] vma_interval_tree_remove+0xc75/0xec0 [ 31.667044] vma_prepare+0xc54/0x11a0 [ 31.667545] __split_vma+0x5af/0x950 [ 31.668049] ? __pfx___split_vma+0x10/0x10 [ 31.668598] ? find_held_lock+0x2c/0x110 [ 31.669133] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.669718] ? lock_is_held_type+0x9f/0x120 [ 31.670264] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.670883] ? mtree_range_walk+0x632/0x900 [ 31.671465] ? mas_walk+0x5c7/0x7c0 [ 31.671961] do_vmi_munmap+0x1f1/0x2b0 [ 31.672492] mmap_region+0x1f9/0x2660 [ 31.672973] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.673508] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.674218] ? __pfx_lock_acquire+0x10/0x10 [ 31.674757] ? __pfx_mmap_region+0x10/0x10 [ 31.675294] ? security_mmap_addr+0x7d/0xa0 [ 31.675867] ? get_unmapped_area+0x1f5/0x3f0 [ 31.676449] do_mmap+0x854/0xf00 [ 31.676891] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.677402] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.677968] ksys_mmap_pgoff+0x3af/0x500 [ 31.678490] do_syscall_64+0x3f/0x90 [ 31.678970] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.679643] RIP: 0033:0x7fc09d955d82 [ 31.680119] 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 [ 31.682297] RSP: 002b:00007fffbe9fe268 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.683212] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc09d955d82 [ 31.684085] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc09cd8f000 [ 31.684952] RBP: 00007fc09cd8f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.685811] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559ffc278b20 [ 31.686686] R13: 00007fffbe9fe280 R14: 00007fffbe9fe2b0 R15: 00007fffbe9fe610 [ 31.687569] [ 31.687890] [ 31.688111] Allocated by task 213: [ 31.688550] kasan_save_stack+0x22/0x50 [ 31.689061] kasan_set_track+0x25/0x30 [ 31.689578] __kasan_slab_alloc+0x59/0x70 [ 31.690101] kmem_cache_alloc+0x16b/0x370 [ 31.690634] vm_area_dup+0x20/0x160 [ 31.691091] __split_vma+0x170/0x950 [ 31.691594] split_vma+0xc6/0x110 [ 31.692055] mprotect_fixup+0x8d2/0xb30 [ 31.692570] do_mprotect_pkey+0x87e/0xd40 [ 31.693093] __x64_sys_mprotect+0x78/0xc0 [ 31.693635] do_syscall_64+0x3f/0x90 [ 31.694114] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.694774] [ 31.694990] Freed by task 213: [ 31.695396] kasan_save_stack+0x22/0x50 [ 31.695923] kasan_set_track+0x25/0x30 [ 31.696448] kasan_save_free_info+0x2b/0x50 [ 31.696987] __kasan_slab_free+0x10a/0x190 [ 31.697542] kmem_cache_free+0x10d/0x4d0 [ 31.698053] rcu_core+0x8c8/0x2860 [ 31.698527] __do_softirq+0x1b7/0x7d4 [ 31.699005] [ 31.699220] Last potentially related work creation: [ 31.699822] kasan_save_stack+0x22/0x50 [ 31.700339] __kasan_record_aux_stack+0x8e/0xa0 [ 31.700908] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.701659] remove_vma+0x139/0x170 [ 31.702289] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.702895] do_vmi_munmap+0x1f1/0x2b0 [ 31.703392] __vm_munmap+0x138/0x3a0 [ 31.703897] __x64_sys_munmap+0x59/0x80 [ 31.704415] do_syscall_64+0x3f/0x90 [ 31.704902] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.705571] [ 31.705792] The buggy address belongs to the object at ffff888016625bc8 [ 31.705792] which belongs to the cache vm_area_struct of size 168 [ 31.707297] The buggy address is located 88 bytes inside of [ 31.707297] freed 168-byte region [ffff888016625bc8, ffff888016625c70) [ 31.708749] [ 31.708971] The buggy address belongs to the physical page: [ 31.709648] page:00000000714a73f1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16625 [ 31.710764] memcg:ffff888019c0ec01 [ 31.711195] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.711884] page_type: 0xffffffff() [ 31.712358] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.713277] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019c0ec01 [ 31.714187] page dumped because: kasan: bad access detected [ 31.714864] [ 31.715082] Memory state around the buggy address: [ 31.715670] ffff888016625b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.716586] ffff888016625b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.717446] >ffff888016625c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.718289] ^ [ 31.718822] ffff888016625c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.719714] ffff888016625d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.720591] ================================================================== [ 31.721665] Disabling lock debugging due to kernel taint [ 33.634253] BUG: Bad rss-counter state mm:00000000afb65676 type:MM_FILEPAGES val:33 [ 33.635533] BUG: Bad rss-counter state mm:00000000afb65676 type:MM_ANONPAGES val:22 [ 34.103309] BUG: Bad rss-counter state mm:00000000d2b17175 type:MM_FILEPAGES val:33 [ 34.104508] BUG: Bad rss-counter state mm:00000000d2b17175 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56734' (ECDSA) to the list of known hosts. 2023/06/21 00:54:36 fuzzer started 2023/06/21 00:54:37 dialing manager at localhost:36067 2023/06/21 00:54:37 checking machine... 2023/06/21 00:54:37 checking revisions... [ 34.815934] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:54:37 testing simple program... [ 34.856701] cgroup: Unknown subsys name 'net' [ 34.896447] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:54:36 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888015c2f868 RCX=0000000000000001 RDX=0000000000000000 RSI=ffffffff818080db RDI=ffff888015c2f874 RBP=0000000000000000 RSP=ffff888015c2f780 R8 =0000000000000001 R9 =ffff888015c2f7e0 R10=0000000000038001 R11=0000000000021eef R12=ffff888015c2f868 R13=0000000000000000 R14=ffff888016afb680 R15=ffff88800e9e1720 RIP=ffffffff813ad4ee RFL=00000213 [----A-C] 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 00007fce58325900 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=00007fce577af940 CR3=00000000094d6000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=a0ca79bef93f2e2e00000000000ae988 XMM05=eb5d9602efecd40e0000000000133b70 XMM06=4fda316b135da52b0000000000132960 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000002 RBX=0000000000000001 RCX=ffffffff861297ae RDX=0000000000000008 RSI=ffff88800f697f20 RDI=ffff88806cf09a78 RBP=ffff88806cf09ad0 RSP=ffff88806cf09a00 R8 =ffffffff861297b2 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=000000000001e471 R12=ffff88806cf09ad8 R13=ffff88806cf09ac0 R14=ffff88800f697f28 R15=ffff88806cf09a78 RIP=ffffffff811303f0 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 00007ff7bb763900 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=00007ff7bb732008 CR3=000000000fc0c000 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