syzkaller login: [ 31.718907] BUG: Bad rss-counter state mm:000000008d851f92 type:MM_FILEPAGES val:33 [ 31.719996] BUG: Bad rss-counter state mm:000000008d851f92 type:MM_ANONPAGES val:22 [ 31.898990] ================================================================== [ 31.900076] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.901234] Read of size 8 at addr ffff88800e106228 by task sshd/222 [ 31.902227] [ 31.902441] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.903295] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.904302] Call Trace: [ 31.904630] [ 31.904919] dump_stack_lvl+0x91/0xf0 [ 31.905402] print_report+0xcc/0x620 [ 31.905861] ? __virt_addr_valid+0x102/0x340 [ 31.906402] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.907018] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.907609] kasan_report+0xbe/0xf0 [ 31.908069] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.908669] vma_interval_tree_remove+0xc75/0xec0 [ 31.909252] vma_prepare+0xc54/0x11a0 [ 31.909726] __split_vma+0x5af/0x950 [ 31.910206] ? __pfx___split_vma+0x10/0x10 [ 31.910737] ? find_held_lock+0x2c/0x110 [ 31.911265] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.911842] ? lock_is_held_type+0x9f/0x120 [ 31.912388] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.912988] ? mtree_range_walk+0x632/0x900 [ 31.913565] ? mas_walk+0x5c7/0x7c0 [ 31.914055] do_vmi_munmap+0x1f1/0x2b0 [ 31.914568] mmap_region+0x1f9/0x2660 [ 31.915073] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.915591] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.916327] ? __pfx_lock_acquire+0x10/0x10 [ 31.916860] ? __pfx_mmap_region+0x10/0x10 [ 31.917405] ? security_mmap_addr+0x7d/0xa0 [ 31.917959] ? get_unmapped_area+0x1f5/0x3f0 [ 31.918520] do_mmap+0x854/0xf00 [ 31.918977] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.919484] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.920050] ksys_mmap_pgoff+0x3af/0x500 [ 31.920569] do_syscall_64+0x3f/0x90 [ 31.921050] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.921715] RIP: 0033:0x7ff7df515d82 [ 31.922176] 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 [ 31.924323] RSP: 002b:00007ffce2f27938 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.925270] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff7df515d82 [ 31.926097] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff7de94f000 [ 31.926898] RBP: 00007ff7de94f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.927701] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563acb1e6ec0 [ 31.928495] R13: 00007ffce2f27950 R14: 00007ffce2f27980 R15: 00007ffce2f27ce0 [ 31.929314] [ 31.929594] [ 31.929802] Allocated by task 212: [ 31.930204] kasan_save_stack+0x22/0x50 [ 31.930697] kasan_set_track+0x25/0x30 [ 31.931192] __kasan_slab_alloc+0x59/0x70 [ 31.931735] kmem_cache_alloc+0x16b/0x370 [ 31.932254] vm_area_dup+0x20/0x160 [ 31.932737] __split_vma+0x170/0x950 [ 31.933239] split_vma+0xc6/0x110 [ 31.933685] mprotect_fixup+0x8d2/0xb30 [ 31.934188] do_mprotect_pkey+0x87e/0xd40 [ 31.934713] __x64_sys_mprotect+0x78/0xc0 [ 31.935239] do_syscall_64+0x3f/0x90 [ 31.935732] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.936386] [ 31.936606] Freed by task 19: [ 31.936985] kasan_save_stack+0x22/0x50 [ 31.937502] kasan_set_track+0x25/0x30 [ 31.937994] kasan_save_free_info+0x2b/0x50 [ 31.938539] __kasan_slab_free+0x10a/0x190 [ 31.939073] kmem_cache_free+0x10d/0x4d0 [ 31.939582] rcu_core+0x8c8/0x2860 [ 31.940031] __do_softirq+0x1b7/0x7d4 [ 31.940524] [ 31.940740] Last potentially related work creation: [ 31.941330] kasan_save_stack+0x22/0x50 [ 31.941838] __kasan_record_aux_stack+0x8e/0xa0 [ 31.942413] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.943054] remove_vma+0x139/0x170 [ 31.943506] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.944066] do_vmi_munmap+0x1f1/0x2b0 [ 31.944560] __vm_munmap+0x138/0x3a0 [ 31.945030] __x64_sys_munmap+0x59/0x80 [ 31.945556] do_syscall_64+0x3f/0x90 [ 31.946031] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.946678] [ 31.946892] Second to last potentially related work creation: [ 31.947570] kasan_save_stack+0x22/0x50 [ 31.948075] __kasan_record_aux_stack+0x8e/0xa0 [ 31.948648] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.949297] remove_vma+0x139/0x170 [ 31.949758] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.950314] do_vmi_munmap+0x1f1/0x2b0 [ 31.950810] mmap_region+0x1f9/0x2660 [ 31.951287] do_mmap+0x854/0xf00 [ 31.951718] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.952207] ksys_mmap_pgoff+0x3af/0x500 [ 31.952708] do_syscall_64+0x3f/0x90 [ 31.953186] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.953848] [ 31.954067] The buggy address belongs to the object at ffff88800e1061d0 [ 31.954067] which belongs to the cache vm_area_struct of size 168 [ 31.955538] The buggy address is located 88 bytes inside of [ 31.955538] freed 168-byte region [ffff88800e1061d0, ffff88800e106278) [ 31.956930] [ 31.957150] The buggy address belongs to the physical page: [ 31.957815] page:00000000052e5471 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe106 [ 31.958888] memcg:ffff88800da05001 [ 31.959309] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.960012] page_type: 0xffffffff() [ 31.960458] raw: 0100000000000200 ffff88800879fc80 ffffea00003a9b00 dead000000000005 [ 31.961378] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800da05001 [ 31.962316] page dumped because: kasan: bad access detected [ 31.962981] [ 31.963197] Memory state around the buggy address: [ 31.963802] ffff88800e106100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.964677] ffff88800e106180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.965568] >ffff88800e106200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.966430] ^ [ 31.966985] ffff88800e106280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.967848] ffff88800e106300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.968725] ================================================================== [ 31.969713] Disabling lock debugging due to kernel taint [ 34.027528] BUG: Bad rss-counter state mm:00000000c7470f76 type:MM_FILEPAGES val:33 [ 34.028703] BUG: Bad rss-counter state mm:00000000c7470f76 type:MM_ANONPAGES val:22 [ 34.522049] BUG: Bad rss-counter state mm:00000000ac206483 type:MM_FILEPAGES val:33 [ 34.523170] BUG: Bad rss-counter state mm:00000000ac206483 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39210' (ECDSA) to the list of known hosts. 2023/06/20 01:18:04 fuzzer started 2023/06/20 01:18:04 dialing manager at localhost:44161 2023/06/20 01:18:04 checking machine... 2023/06/20 01:18:04 checking revisions... [ 35.292582] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:18:04 testing simple program... [ 35.342095] cgroup: Unknown subsys name 'net' [ 35.383092] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:18:03 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007fea5ca162fd RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=00007fea5ca162fd RSP=ffff88800d857590 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88800d857698 R13=0000000000000000 R14=ffff888016c01b40 R15=ffff88800ebefe40 RIP=ffffffff811fc7e8 RFL=00000286 [--S--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 00007fea5c14c900 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=00007ffc47416f98 CR3=00000000093c2000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=9ba338cbbacdb1d900000000000ae988 XMM05=1319e678c5640f8a0000000000135ef0 XMM06=94aac670ef06ff650000000000135e58 XMM07=58f17c1affdc82d600000000001255d8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff81378270 RDX=1ffff1100357a5ba RSI=0000000000000000 RDI=ffff88800844f780 RBP=dead000000000122 RSP=ffff88806cf09e30 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=dead000000000100 R13=ffff88801abd2d90 R14=ffff88801abd2d10 R15=dffffc0000000000 RIP=ffffffff81845e46 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 00007f86b26d5900 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=00007ffe63bf1000 CR3=000000000cada000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000