syzkaller login: [ 31.400950] BUG: Bad rss-counter state mm:0000000064a77b75 type:MM_FILEPAGES val:33 [ 31.402465] BUG: Bad rss-counter state mm:0000000064a77b75 type:MM_ANONPAGES val:22 [ 31.579859] ================================================================== [ 31.580999] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.582054] Read of size 8 at addr ffff8880167ef140 by task sshd/219 [ 31.583025] [ 31.583246] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.584113] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.585114] Call Trace: [ 31.585435] [ 31.585726] dump_stack_lvl+0x91/0xf0 [ 31.586219] print_report+0xcc/0x620 [ 31.586714] ? __virt_addr_valid+0x102/0x340 [ 31.587266] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.587881] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.588498] kasan_report+0xbe/0xf0 [ 31.588987] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.589606] vma_interval_tree_remove+0xc75/0xec0 [ 31.590210] vma_prepare+0xc54/0x11a0 [ 31.590691] __split_vma+0x5af/0x950 [ 31.591163] ? __pfx___split_vma+0x10/0x10 [ 31.591689] ? find_held_lock+0x2c/0x110 [ 31.592204] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.592775] ? lock_is_held_type+0x9f/0x120 [ 31.593337] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.593939] ? mtree_range_walk+0x632/0x900 [ 31.594490] ? mas_walk+0x5c7/0x7c0 [ 31.594963] do_vmi_munmap+0x1f1/0x2b0 [ 31.595455] mmap_region+0x1f9/0x2660 [ 31.595934] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.596445] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.597155] ? __pfx_lock_acquire+0x10/0x10 [ 31.597688] ? __pfx_mmap_region+0x10/0x10 [ 31.598217] ? security_mmap_addr+0x7d/0xa0 [ 31.598749] ? get_unmapped_area+0x1f5/0x3f0 [ 31.599298] do_mmap+0x854/0xf00 [ 31.599739] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.600228] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.600784] ksys_mmap_pgoff+0x3af/0x500 [ 31.601305] do_syscall_64+0x3f/0x90 [ 31.601782] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.602435] RIP: 0033:0x7fdb95e32d82 [ 31.602894] 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 [ 31.605039] RSP: 002b:00007ffe3a0e76b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.605949] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdb95e32d82 [ 31.606785] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdb9526c000 [ 31.607636] RBP: 00007fdb9526c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.608477] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ee1327bd90 [ 31.609334] R13: 00007ffe3a0e76d0 R14: 00007ffe3a0e7700 R15: 00007ffe3a0e7a60 [ 31.610215] [ 31.610503] [ 31.610721] Allocated by task 212: [ 31.611144] kasan_save_stack+0x22/0x50 [ 31.611651] kasan_set_track+0x25/0x30 [ 31.612152] __kasan_slab_alloc+0x59/0x70 [ 31.612680] kmem_cache_alloc+0x16b/0x370 [ 31.613218] vm_area_dup+0x20/0x160 [ 31.613670] __split_vma+0x170/0x950 [ 31.614132] split_vma+0xc6/0x110 [ 31.614570] mprotect_fixup+0x8d2/0xb30 [ 31.615074] do_mprotect_pkey+0x87e/0xd40 [ 31.615597] __x64_sys_mprotect+0x78/0xc0 [ 31.616113] do_syscall_64+0x3f/0x90 [ 31.616587] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.617249] [ 31.617462] Freed by task 212: [ 31.617855] kasan_save_stack+0x22/0x50 [ 31.618360] kasan_set_track+0x25/0x30 [ 31.618861] kasan_save_free_info+0x2b/0x50 [ 31.619384] __kasan_slab_free+0x10a/0x190 [ 31.619911] kmem_cache_free+0x10d/0x4d0 [ 31.620416] rcu_core+0x8c8/0x2860 [ 31.620873] __do_softirq+0x1b7/0x7d4 [ 31.621356] [ 31.621573] Last potentially related work creation: [ 31.622160] kasan_save_stack+0x22/0x50 [ 31.622652] __kasan_record_aux_stack+0x8e/0xa0 [ 31.623221] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.623857] remove_vma+0x139/0x170 [ 31.624379] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.624960] do_vmi_munmap+0x1f1/0x2b0 [ 31.625444] __vm_munmap+0x138/0x3a0 [ 31.625911] __x64_sys_munmap+0x59/0x80 [ 31.626405] do_syscall_64+0x3f/0x90 [ 31.626873] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.627512] [ 31.627727] The buggy address belongs to the object at ffff8880167ef0e8 [ 31.627727] which belongs to the cache vm_area_struct of size 168 [ 31.629187] The buggy address is located 88 bytes inside of [ 31.629187] freed 168-byte region [ffff8880167ef0e8, ffff8880167ef190) [ 31.630580] [ 31.630792] The buggy address belongs to the physical page: [ 31.631443] page:000000007aba4ec9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x167ef [ 31.632528] memcg:ffff888016a9ab01 [ 31.632964] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.633617] page_type: 0xffffffff() [ 31.634072] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.635027] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016a9ab01 [ 31.636124] page dumped because: kasan: bad access detected [ 31.636935] [ 31.637197] Memory state around the buggy address: [ 31.637893] ffff8880167ef000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.638932] ffff8880167ef080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.639968] >ffff8880167ef100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.641026] ^ [ 31.641801] ffff8880167ef180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.642830] ffff8880167ef200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.643851] ================================================================== [ 31.645108] Disabling lock debugging due to kernel taint [ 33.740262] BUG: Bad rss-counter state mm:00000000c1e80872 type:MM_FILEPAGES val:33 [ 33.741750] BUG: Bad rss-counter state mm:00000000c1e80872 type:MM_ANONPAGES val:22 [ 34.149760] BUG: Bad rss-counter state mm:00000000e8a7bca4 type:MM_FILEPAGES val:33 [ 34.151029] BUG: Bad rss-counter state mm:00000000e8a7bca4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42525' (ECDSA) to the list of known hosts. 2023/06/20 11:41:29 fuzzer started 2023/06/20 11:41:29 dialing manager at localhost:36067 2023/06/20 11:41:29 checking machine... 2023/06/20 11:41:29 checking revisions... [ 34.896932] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:41:29 testing simple program... [ 34.941355] cgroup: Unknown subsys name 'net' [ 34.992505] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:41:28 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff88800ee44780 RCX=ffff88801014fec8 RDX=000000000000011a RSI=00007f8af40307c0 RDI=ffff88800ee44780 RBP=000000000000011a RSP=ffff88801014fd60 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=dffffc0000000000 R13=00007f8af40307c0 R14=1ffff11002029fb2 R15=ffff88801014fec8 RIP=ffffffff814c086b 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 00007f8afecee700 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=00007f53666ef5d0 CR3=000000000f1b4000 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=2038323a31343a3131203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038323a31343a3131203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff864bbb54 RDX=1ffff1100d9e1352 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806cf09a92 RSP=ffff88806cf099e0 R8 =ffffffff864bbb58 R9 =ffff88806cf09a90 R10=0000000000038001 R11=00000000000b6a61 R12=ffff8880165bff58 R13=ffff88806cf09a98 R14=ffff8880165bff58 R15=ffff88806cf09a50 RIP=ffffffff81131b9c RFL=00000212 [----A--] 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 00007fe3c1d66900 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=00007fffada0f000 CR3=000000000ee12000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000