syzkaller login: [ 39.302476] BUG: Bad rss-counter state mm:00000000e9073645 type:MM_FILEPAGES val:33 [ 39.303502] BUG: Bad rss-counter state mm:00000000e9073645 type:MM_ANONPAGES val:22 [ 39.474794] ================================================================== [ 39.475870] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.476830] Read of size 8 at addr ffff8880168b6c20 by task sshd/222 [ 39.477690] [ 39.477908] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.478748] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.479711] Call Trace: [ 39.480025] [ 39.480301] dump_stack_lvl+0x91/0xf0 [ 39.480773] print_report+0xcc/0x620 [ 39.481236] ? __virt_addr_valid+0x102/0x340 [ 39.481780] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.482372] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.482981] kasan_report+0xbe/0xf0 [ 39.483444] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.484059] vma_interval_tree_remove+0xc75/0xec0 [ 39.484641] vma_prepare+0xc54/0x11a0 [ 39.485107] __split_vma+0x5af/0x950 [ 39.485564] ? __pfx___split_vma+0x10/0x10 [ 39.486085] ? find_held_lock+0x2c/0x110 [ 39.486591] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.487139] ? avc_lookup+0xc8/0x1d0 [ 39.487633] ? lock_is_held_type+0x9f/0x120 [ 39.488161] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.488755] ? mtree_range_walk+0x632/0x900 [ 39.489302] ? mas_walk+0x5c7/0x7c0 [ 39.489767] do_vmi_munmap+0x1f1/0x2b0 [ 39.490252] mmap_region+0x1f9/0x2660 [ 39.490724] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.491226] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.491927] ? __pfx_lock_acquire+0x10/0x10 [ 39.492447] ? __pfx_mmap_region+0x10/0x10 [ 39.492967] ? security_mmap_addr+0x7d/0xa0 [ 39.493484] ? get_unmapped_area+0x1f5/0x3f0 [ 39.494021] do_mmap+0x854/0xf00 [ 39.494452] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.494938] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.495504] ksys_mmap_pgoff+0x3af/0x500 [ 39.496001] do_syscall_64+0x3f/0x90 [ 39.496471] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.497096] RIP: 0033:0x7f1938729d82 [ 39.497539] 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 [ 39.499595] RSP: 002b:00007ffdc8d11588 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.500473] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1938729d82 [ 39.501290] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1937b63000 [ 39.502106] RBP: 00007f1937b63000 R08: 0000000000000009 R09: 0000000000001000 [ 39.502920] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558f27228ec0 [ 39.503745] R13: 00007ffdc8d115a0 R14: 00007ffdc8d115d0 R15: 00007ffdc8d11930 [ 39.504567] [ 39.504852] [ 39.505059] Allocated by task 215: [ 39.505471] kasan_save_stack+0x22/0x50 [ 39.505960] kasan_set_track+0x25/0x30 [ 39.506437] __kasan_slab_alloc+0x59/0x70 [ 39.506940] kmem_cache_alloc+0x16b/0x370 [ 39.507441] vm_area_dup+0x20/0x160 [ 39.507907] __split_vma+0x170/0x950 [ 39.508363] split_vma+0xc6/0x110 [ 39.508790] mprotect_fixup+0x8d2/0xb30 [ 39.509279] do_mprotect_pkey+0x87e/0xd40 [ 39.509784] __x64_sys_mprotect+0x78/0xc0 [ 39.510295] do_syscall_64+0x3f/0x90 [ 39.510760] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.511386] [ 39.511602] Freed by task 215: [ 39.511980] kasan_save_stack+0x22/0x50 [ 39.512473] kasan_set_track+0x25/0x30 [ 39.512955] kasan_save_free_info+0x2b/0x50 [ 39.513473] __kasan_slab_free+0x10a/0x190 [ 39.513988] kmem_cache_free+0x10d/0x4d0 [ 39.514483] rcu_core+0x8c8/0x2860 [ 39.514913] __do_softirq+0x1b7/0x7d4 [ 39.515376] [ 39.515598] Last potentially related work creation: [ 39.516170] kasan_save_stack+0x22/0x50 [ 39.516661] __kasan_record_aux_stack+0x8e/0xa0 [ 39.517215] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.517839] remove_vma+0x139/0x170 [ 39.518276] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.518817] do_vmi_munmap+0x1f1/0x2b0 [ 39.519288] __vm_munmap+0x138/0x3a0 [ 39.519757] __x64_sys_munmap+0x59/0x80 [ 39.520240] do_syscall_64+0x3f/0x90 [ 39.520700] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.521322] [ 39.521531] The buggy address belongs to the object at ffff8880168b6bc8 [ 39.521531] which belongs to the cache vm_area_struct of size 168 [ 39.522959] The buggy address is located 88 bytes inside of [ 39.522959] freed 168-byte region [ffff8880168b6bc8, ffff8880168b6c70) [ 39.524324] [ 39.524531] The buggy address belongs to the physical page: [ 39.525179] page:00000000c62d74ed refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x168b6 [ 39.526246] memcg:ffff8880183cc101 [ 39.526658] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.527284] page_type: 0xffffffff() [ 39.527731] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 39.528636] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880183cc101 [ 39.529522] page dumped because: kasan: bad access detected [ 39.530166] [ 39.530379] Memory state around the buggy address: [ 39.530941] ffff8880168b6b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.531782] ffff8880168b6b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 39.532618] >ffff8880168b6c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 39.533457] ^ [ 39.533968] ffff8880168b6c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 39.534802] ffff8880168b6d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 39.535633] ================================================================== [ 39.536571] Disabling lock debugging due to kernel taint [ 42.206101] BUG: Bad rss-counter state mm:000000005de63088 type:MM_FILEPAGES val:33 [ 42.207115] BUG: Bad rss-counter state mm:000000005de63088 type:MM_ANONPAGES val:22 [ 42.674603] BUG: Bad rss-counter state mm:00000000f40d1e1d type:MM_FILEPAGES val:33 [ 42.675618] BUG: Bad rss-counter state mm:00000000f40d1e1d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2911' (ECDSA) to the list of known hosts. 2023/06/20 07:23:00 fuzzer started 2023/06/20 07:23:00 dialing manager at localhost:44161 2023/06/20 07:23:00 checking machine... 2023/06/20 07:23:00 checking revisions... [ 43.399921] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:23:00 testing simple program... [ 43.454515] cgroup: Unknown subsys name 'net' [ 43.501669] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:22:50 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=00007ffb9391f000 CR3=000000000e1e2000 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=2039353a32323a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a32323a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff846000aa RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff11002d64f15 RSI=ffffffff846000aa RDI=ffff888016b27918 RBP=ffff888016b278e8 RSP=ffff888016b27848 R8 =0000000000000001 R9 =ffff888016b27890 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff888016b27918 R13=0000000000000000 R14=ffff888008fe51c0 R15=ffff88800e635130 RIP=ffffffff813ad424 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 00007fd3e91bd900 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=00007ffd6396e000 CR3=0000000016a00000 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=6720646572637465733a4d41503d706f 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