syzkaller login: [ 34.607386] BUG: Bad rss-counter state mm:000000003022f496 type:MM_FILEPAGES val:33 [ 34.608387] BUG: Bad rss-counter state mm:000000003022f496 type:MM_ANONPAGES val:22 [ 34.709027] ================================================================== [ 34.709738] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.710459] Read of size 8 at addr ffff888015e91a50 by task sshd/222 [ 34.711046] [ 34.711215] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.711883] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.712749] Call Trace: [ 34.712993] [ 34.713215] dump_stack_lvl+0x91/0xf0 [ 34.713585] print_report+0xcc/0x620 [ 34.713962] ? __virt_addr_valid+0x102/0x340 [ 34.714379] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.714875] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.715342] kasan_report+0xbe/0xf0 [ 34.715707] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.716063] vma_interval_tree_remove+0xc75/0xec0 [ 34.716390] vma_prepare+0xc54/0x11a0 [ 34.716654] __split_vma+0x5af/0x950 [ 34.716911] ? __pfx___split_vma+0x10/0x10 [ 34.717197] ? find_held_lock+0x2c/0x110 [ 34.717483] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.717804] ? lock_is_held_type+0x9f/0x120 [ 34.718122] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.718487] ? mtree_range_walk+0x632/0x900 [ 34.718816] ? mas_walk+0x5c7/0x7c0 [ 34.719097] do_vmi_munmap+0x1f1/0x2b0 [ 34.719385] mmap_region+0x1f9/0x2660 [ 34.719663] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.719965] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.720402] ? __pfx_lock_acquire+0x10/0x10 [ 34.720721] ? __pfx_mmap_region+0x10/0x10 [ 34.721033] ? security_mmap_addr+0x7d/0xa0 [ 34.721350] ? get_unmapped_area+0x1f5/0x3f0 [ 34.721674] do_mmap+0x854/0xf00 [ 34.721942] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.722233] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.722558] ksys_mmap_pgoff+0x3af/0x500 [ 34.722863] do_syscall_64+0x3f/0x90 [ 34.723143] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.723537] RIP: 0033:0x7f3158f03d82 [ 34.723804] 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 [ 34.725077] RSP: 002b:00007fff45083cb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.725615] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3158f03d82 [ 34.726124] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f315833d000 [ 34.726642] RBP: 00007f315833d000 R08: 0000000000000009 R09: 0000000000001000 [ 34.727136] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564bad993ec0 [ 34.727644] R13: 00007fff45083cd0 R14: 00007fff45083d00 R15: 00007fff45084060 [ 34.728156] [ 34.728325] [ 34.728448] Allocated by task 215: [ 34.728707] kasan_save_stack+0x22/0x50 [ 34.729004] kasan_set_track+0x25/0x30 [ 34.729297] __kasan_slab_alloc+0x59/0x70 [ 34.729601] kmem_cache_alloc+0x16b/0x370 [ 34.729903] vm_area_dup+0x20/0x160 [ 34.730171] __split_vma+0x170/0x950 [ 34.730448] split_vma+0xc6/0x110 [ 34.730703] mprotect_fixup+0x8d2/0xb30 [ 34.731000] do_mprotect_pkey+0x87e/0xd40 [ 34.731301] __x64_sys_mprotect+0x78/0xc0 [ 34.731612] do_syscall_64+0x3f/0x90 [ 34.731885] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.732254] [ 34.732378] Freed by task 13: [ 34.732606] kasan_save_stack+0x22/0x50 [ 34.732901] kasan_set_track+0x25/0x30 [ 34.733191] kasan_save_free_info+0x2b/0x50 [ 34.733509] __kasan_slab_free+0x10a/0x190 [ 34.733836] kmem_cache_free+0x10d/0x4d0 [ 34.734139] rcu_core+0x8c8/0x2860 [ 34.734402] __do_softirq+0x1b7/0x7d4 [ 34.734673] [ 34.734802] Last potentially related work creation: [ 34.735142] kasan_save_stack+0x22/0x50 [ 34.735432] __kasan_record_aux_stack+0x8e/0xa0 [ 34.735766] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.736145] remove_vma+0x139/0x170 [ 34.736407] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.736730] do_vmi_munmap+0x1f1/0x2b0 [ 34.737015] __vm_munmap+0x138/0x3a0 [ 34.737295] __x64_sys_munmap+0x59/0x80 [ 34.737580] do_syscall_64+0x3f/0x90 [ 34.737856] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.738230] [ 34.738357] The buggy address belongs to the object at ffff888015e919f8 [ 34.738357] which belongs to the cache vm_area_struct of size 168 [ 34.739234] The buggy address is located 88 bytes inside of [ 34.739234] freed 168-byte region [ffff888015e919f8, ffff888015e91aa0) [ 34.740060] [ 34.740185] The buggy address belongs to the physical page: [ 34.740572] page:00000000facf162f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15e91 [ 34.741219] memcg:ffff888016ca5401 [ 34.741463] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.741860] page_type: 0xffffffff() [ 34.742122] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.742655] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016ca5401 [ 34.743188] page dumped because: kasan: bad access detected [ 34.743577] [ 34.743703] Memory state around the buggy address: [ 34.744037] ffff888015e91900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.744550] ffff888015e91980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 34.745065] >ffff888015e91a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.745572] ^ [ 34.745999] ffff888015e91a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 34.746516] ffff888015e91b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.747019] ================================================================== [ 34.747587] Disabling lock debugging due to kernel taint [ 36.457380] BUG: Bad rss-counter state mm:000000007dbdf591 type:MM_FILEPAGES val:33 [ 36.458239] BUG: Bad rss-counter state mm:000000007dbdf591 type:MM_ANONPAGES val:22 [ 36.883334] BUG: Bad rss-counter state mm:0000000001a5e458 type:MM_FILEPAGES val:33 [ 36.884108] BUG: Bad rss-counter state mm:0000000001a5e458 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56705' (ECDSA) to the list of known hosts. 2023/06/20 02:50:59 fuzzer started 2023/06/20 02:51:00 dialing manager at localhost:44161 2023/06/20 02:51:00 checking machine... 2023/06/20 02:51:00 checking revisions... [ 37.597506] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:51:00 testing simple program... [ 37.649605] cgroup: Unknown subsys name 'net' [ 37.688194] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:50:55 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=ffff88806ce09e38 RSI=ffff88806ce09e10 RDI=ffff88806ce09aa8 RBP=ffff88806ce02000 RSP=ffff88806ce09a68 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020dae R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09e10 R15=ffff88806ce09a98 RIP=ffffffff81130930 RFL=00000296 [--S-AP-] 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=00007ff534cf5890 CR3=0000000009ca6000 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=30353a3230203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3133325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363130 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf39500 RCX=00000008955aa1fd RDX=1ffff1100d9e4fdd RSI=0000000000000004 RDI=ffffffff852c5908 RBP=ffff88806cf27ee8 RSP=ffff88806cf09d40 R8 =ffff88806cf39f40 R9 =ffffed100d9e13a3 R10=0000000000000003 R11=ffff88806cf09ff8 R12=000000003d175400 R13=0000000000000001 R14=ffff88806cf39f08 R15=ffff888016859b40 RIP=ffffffff812360f7 RFL=00000046 [---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 00007f3ff1249900 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=00007f3ff1228020 CR3=000000000ec96000 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