syzkaller login: [ 35.743082] BUG: Bad rss-counter state mm:0000000076b0cbd9 type:MM_FILEPAGES val:33 [ 35.744404] BUG: Bad rss-counter state mm:0000000076b0cbd9 type:MM_ANONPAGES val:22 [ 35.896737] ================================================================== [ 35.897640] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.898570] Read of size 8 at addr ffff88800f640798 by task sshd/220 [ 35.899528] [ 35.899747] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.900603] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.901597] Call Trace: [ 35.901918] [ 35.902204] dump_stack_lvl+0x91/0xf0 [ 35.902691] print_report+0xcc/0x620 [ 35.903173] ? __virt_addr_valid+0x102/0x340 [ 35.903739] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.904354] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.904966] kasan_report+0xbe/0xf0 [ 35.905441] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.906068] vma_interval_tree_remove+0xc75/0xec0 [ 35.906672] vma_prepare+0xc54/0x11a0 [ 35.907149] __split_vma+0x5af/0x950 [ 35.907627] ? __pfx___split_vma+0x10/0x10 [ 35.908155] ? find_held_lock+0x2c/0x110 [ 35.908673] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.909236] ? lock_is_held_type+0x9f/0x120 [ 35.909770] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.910377] ? mtree_range_walk+0x632/0x900 [ 35.910930] ? mas_walk+0x5c7/0x7c0 [ 35.911422] do_vmi_munmap+0x1f1/0x2b0 [ 35.911914] mmap_region+0x1f9/0x2660 [ 35.912397] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.912904] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.913613] ? __pfx_lock_acquire+0x10/0x10 [ 35.914143] ? __pfx_mmap_region+0x10/0x10 [ 35.914672] ? security_mmap_addr+0x7d/0xa0 [ 35.915200] ? get_unmapped_area+0x1f5/0x3f0 [ 35.915756] do_mmap+0x854/0xf00 [ 35.916194] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.916687] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.917247] ksys_mmap_pgoff+0x3af/0x500 [ 35.917752] do_syscall_64+0x3f/0x90 [ 35.918225] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.918870] RIP: 0033:0x7f8d5f18cd82 [ 35.919326] 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 [ 35.921478] RSP: 002b:00007ffcc8a53968 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.922385] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8d5f18cd82 [ 35.923234] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8d5e5c6000 [ 35.924087] RBP: 00007f8d5e5c6000 R08: 0000000000000009 R09: 0000000000001000 [ 35.924938] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557273018b20 [ 35.925782] R13: 00007ffcc8a53980 R14: 00007ffcc8a539b0 R15: 00007ffcc8a53d10 [ 35.926643] [ 35.926938] [ 35.927153] Allocated by task 213: [ 35.927587] kasan_save_stack+0x22/0x50 [ 35.928097] kasan_set_track+0x25/0x30 [ 35.928595] __kasan_slab_alloc+0x59/0x70 [ 35.929119] kmem_cache_alloc+0x16b/0x370 [ 35.929648] vm_area_dup+0x20/0x160 [ 35.930111] __split_vma+0x170/0x950 [ 35.930592] split_vma+0xc6/0x110 [ 35.931031] mprotect_fixup+0x8d2/0xb30 [ 35.931567] do_mprotect_pkey+0x87e/0xd40 [ 35.932093] __x64_sys_mprotect+0x78/0xc0 [ 35.932621] do_syscall_64+0x3f/0x90 [ 35.933098] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.933738] [ 35.933953] Freed by task 213: [ 35.934347] kasan_save_stack+0x22/0x50 [ 35.934854] kasan_set_track+0x25/0x30 [ 35.935350] kasan_save_free_info+0x2b/0x50 [ 35.935897] __kasan_slab_free+0x10a/0x190 [ 35.936438] kmem_cache_free+0x10d/0x4d0 [ 35.936947] rcu_core+0x8c8/0x2860 [ 35.937396] __do_softirq+0x1b7/0x7d4 [ 35.937869] [ 35.938084] Last potentially related work creation: [ 35.938673] kasan_save_stack+0x22/0x50 [ 35.939181] __kasan_record_aux_stack+0x8e/0xa0 [ 35.939774] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.940486] remove_vma+0x139/0x170 [ 35.940940] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.941513] do_vmi_munmap+0x1f1/0x2b0 [ 35.942002] __vm_munmap+0x138/0x3a0 [ 35.942471] __x64_sys_munmap+0x59/0x80 [ 35.942976] do_syscall_64+0x3f/0x90 [ 35.943454] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.944094] [ 35.944310] The buggy address belongs to the object at ffff88800f640740 [ 35.944310] which belongs to the cache vm_area_struct of size 168 [ 35.945783] The buggy address is located 88 bytes inside of [ 35.945783] freed 168-byte region [ffff88800f640740, ffff88800f6407e8) [ 35.947503] [ 35.947782] The buggy address belongs to the physical page: [ 35.948594] page:00000000c62588be refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf640 [ 35.949872] memcg:ffff8880162cd501 [ 35.950278] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.950912] page_type: 0xffffffff() [ 35.951342] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.952258] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880162cd501 [ 35.953144] page dumped because: kasan: bad access detected [ 35.953780] [ 35.953987] Memory state around the buggy address: [ 35.954532] ffff88800f640680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.955367] ffff88800f640700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 35.956235] >ffff88800f640780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 35.957264] ^ [ 35.957878] ffff88800f640800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 35.958913] ffff88800f640880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 35.959950] ================================================================== [ 35.961129] Disabling lock debugging due to kernel taint [ 38.534937] BUG: Bad rss-counter state mm:00000000f602a3df type:MM_FILEPAGES val:33 [ 38.535938] BUG: Bad rss-counter state mm:00000000f602a3df type:MM_ANONPAGES val:22 [ 38.984260] BUG: Bad rss-counter state mm:000000006f603e40 type:MM_FILEPAGES val:33 [ 38.985243] BUG: Bad rss-counter state mm:000000006f603e40 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56088' (ECDSA) to the list of known hosts. 2023/06/20 03:18:59 fuzzer started 2023/06/20 03:19:00 dialing manager at localhost:44161 2023/06/20 03:19:00 checking machine... 2023/06/20 03:19:00 checking revisions... [ 39.684744] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:19:00 testing simple program... [ 39.735273] cgroup: Unknown subsys name 'net' [ 39.783384] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:18:54 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007fcc59ff5880 CR3=0000000016362000 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=2039353a38313a3330203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a38313a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff813ad6d0 RCX=ffff888019c5f6f8 RDX=1ffff1100338bed6 RSI=ffff888019c5f6f0 RDI=ffffffff813ad6d0 RBP=ffff888019c5f6b0 RSP=ffff888019c5f628 R8 =0000000000000001 R9 =ffff888019c5f698 R10=0000000000038001 R11=0000000000003c0d R12=ffff888019c5f720 R13=0000000000000000 R14=ffff888016da51c0 R15=0000000000092cc0 RIP=ffffffff811fc7bf RFL=00000292 [--S-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 00007f012d582900 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=00007ffe348ce000 CR3=000000000d68a000 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