syzkaller login: [ 23.768203] BUG: Bad rss-counter state mm:000000009d75077c type:MM_FILEPAGES val:33 [ 23.768808] BUG: Bad rss-counter state mm:000000009d75077c type:MM_ANONPAGES val:22 [ 23.882272] ================================================================== [ 23.883430] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.884625] Read of size 8 at addr ffff88800eaa8968 by task sshd/220 [ 23.885241] [ 23.885417] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.886138] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.886905] Call Trace: [ 23.887150] [ 23.887372] dump_stack_lvl+0x91/0xf0 [ 23.887747] print_report+0xcc/0x620 [ 23.888141] ? __virt_addr_valid+0x102/0x340 [ 23.888565] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.889034] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.889523] kasan_report+0xbe/0xf0 [ 23.889893] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.890391] vma_interval_tree_remove+0xc75/0xec0 [ 23.890857] vma_prepare+0xc54/0x11a0 [ 23.891234] __split_vma+0x5af/0x950 [ 23.891603] ? __pfx___split_vma+0x10/0x10 [ 23.892043] ? find_held_lock+0x2c/0x110 [ 23.892456] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.892896] ? lock_is_held_type+0x9f/0x120 [ 23.893348] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.893823] ? mtree_range_walk+0x632/0x900 [ 23.894260] ? mas_walk+0x5c7/0x7c0 [ 23.894650] do_vmi_munmap+0x1f1/0x2b0 [ 23.895032] mmap_region+0x1f9/0x2660 [ 23.895422] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.895850] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.896381] ? __pfx_lock_acquire+0x10/0x10 [ 23.896693] ? __pfx_mmap_region+0x10/0x10 [ 23.896998] ? security_mmap_addr+0x7d/0xa0 [ 23.897309] ? get_unmapped_area+0x1f5/0x3f0 [ 23.897648] do_mmap+0x854/0xf00 [ 23.897912] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.898210] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.898546] ksys_mmap_pgoff+0x3af/0x500 [ 23.898841] do_syscall_64+0x3f/0x90 [ 23.899127] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.899496] RIP: 0033:0x7f88a1fe0d82 [ 23.899753] 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 [ 23.901002] RSP: 002b:00007ffcd0609f98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.901495] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f88a1fe0d82 [ 23.902013] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f88a141a000 [ 23.902534] RBP: 00007f88a141a000 R08: 0000000000000009 R09: 0000000000001000 [ 23.903011] R10: 0000000000000812 R11: 0000000000000206 R12: 00005589c2868f70 [ 23.903515] R13: 00007ffcd0609fb0 R14: 00007ffcd0609fe0 R15: 00007ffcd060a340 [ 23.904021] [ 23.904190] [ 23.904313] Allocated by task 213: [ 23.904555] kasan_save_stack+0x22/0x50 [ 23.904846] kasan_set_track+0x25/0x30 [ 23.905122] __kasan_slab_alloc+0x59/0x70 [ 23.905424] kmem_cache_alloc+0x16b/0x370 [ 23.905718] vm_area_dup+0x20/0x160 [ 23.905974] __split_vma+0x170/0x950 [ 23.906235] split_vma+0xc6/0x110 [ 23.906487] mprotect_fixup+0x8d2/0xb30 [ 23.906774] do_mprotect_pkey+0x87e/0xd40 [ 23.907068] __x64_sys_mprotect+0x78/0xc0 [ 23.907364] do_syscall_64+0x3f/0x90 [ 23.907633] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.908041] [ 23.908161] Freed by task 19: [ 23.908392] kasan_save_stack+0x22/0x50 [ 23.908695] kasan_set_track+0x25/0x30 [ 23.908992] kasan_save_free_info+0x2b/0x50 [ 23.909314] __kasan_slab_free+0x10a/0x190 [ 23.909629] kmem_cache_free+0x10d/0x4d0 [ 23.909929] rcu_core+0x8c8/0x2860 [ 23.910173] __do_softirq+0x1b7/0x7d4 [ 23.910439] [ 23.910557] Last potentially related work creation: [ 23.910871] kasan_save_stack+0x22/0x50 [ 23.911147] __kasan_record_aux_stack+0x8e/0xa0 [ 23.911458] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.911809] remove_vma+0x139/0x170 [ 23.912067] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.912370] do_vmi_munmap+0x1f1/0x2b0 [ 23.912636] __vm_munmap+0x138/0x3a0 [ 23.912893] __x64_sys_munmap+0x59/0x80 [ 23.913162] do_syscall_64+0x3f/0x90 [ 23.913425] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.913798] [ 23.913919] Second to last potentially related work creation: [ 23.914311] kasan_save_stack+0x22/0x50 [ 23.914623] __kasan_record_aux_stack+0x8e/0xa0 [ 23.914975] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.915322] remove_vma+0x139/0x170 [ 23.915567] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.915924] do_vmi_munmap+0x1f1/0x2b0 [ 23.916194] __vm_munmap+0x138/0x3a0 [ 23.916451] __x64_sys_munmap+0x59/0x80 [ 23.916720] do_syscall_64+0x3f/0x90 [ 23.916975] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.917329] [ 23.917446] The buggy address belongs to the object at ffff88800eaa8910 [ 23.917446] which belongs to the cache vm_area_struct of size 168 [ 23.918245] The buggy address is located 88 bytes inside of [ 23.918245] freed 168-byte region [ffff88800eaa8910, ffff88800eaa89b8) [ 23.919010] [ 23.919131] The buggy address belongs to the physical page: [ 23.919503] page:000000009d1549cc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeaa8 [ 23.920145] memcg:ffff888016ae2201 [ 23.920392] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.920774] page_type: 0xffffffff() [ 23.921038] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 23.921583] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016ae2201 [ 23.922120] page dumped because: kasan: bad access detected [ 23.922513] [ 23.922636] Memory state around the buggy address: [ 23.922983] ffff88800eaa8800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 23.923459] ffff88800eaa8880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 23.923966] >ffff88800eaa8900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.924454] ^ [ 23.924911] ffff88800eaa8980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 23.925396] ffff88800eaa8a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.925889] ================================================================== [ 23.926528] Disabling lock debugging due to kernel taint [ 25.764020] BUG: Bad rss-counter state mm:0000000066bf1e50 type:MM_FILEPAGES val:33 [ 25.765140] BUG: Bad rss-counter state mm:0000000066bf1e50 type:MM_ANONPAGES val:22 [ 26.140500] BUG: Bad rss-counter state mm:000000004c86112b type:MM_FILEPAGES val:33 [ 26.141888] BUG: Bad rss-counter state mm:000000004c86112b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4960' (ECDSA) to the list of known hosts. 2023/06/21 00:14:57 fuzzer started 2023/06/21 00:14:57 dialing manager at localhost:36067 2023/06/21 00:14:57 checking machine... 2023/06/21 00:14:57 checking revisions... [ 26.655363] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:14:57 testing simple program... [ 26.698511] cgroup: Unknown subsys name 'net' [ 26.747408] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:14:57 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000200 RCX=0000000000000000 RDX=0000000000000008 RSI=ffffffff81806252 RDI=0000000000000000 RBP=ffff88806ce3de20 RSP=ffff88800f19fa00 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000d000c R12=ffff88800844f780 R13=ffffea0000699fc0 R14=ffffea00006956c0 R15=0000000000000001 RIP=ffffffff818062e0 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 00007fe81f11e900 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=00007fffbfec5000 CR3=000000000f272000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007ffd5c814788 CR3=0000000016a30000 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=34313a3030203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343038 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000