syzkaller login: [ 38.719816] BUG: Bad rss-counter state mm:000000006a353201 type:MM_FILEPAGES val:33 [ 38.720838] BUG: Bad rss-counter state mm:000000006a353201 type:MM_ANONPAGES val:22 [ 38.865042] ================================================================== [ 38.866098] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.867146] Read of size 8 at addr ffff88800e920ed8 by task sshd/218 [ 38.868253] [ 38.868481] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.869473] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.870385] Call Trace: [ 38.870695] [ 38.870979] dump_stack_lvl+0x91/0xf0 [ 38.871443] print_report+0xcc/0x620 [ 38.871921] ? __virt_addr_valid+0x102/0x340 [ 38.872438] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.873022] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.873605] kasan_report+0xbe/0xf0 [ 38.874052] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.874643] vma_interval_tree_remove+0xc75/0xec0 [ 38.875211] vma_prepare+0xc54/0x11a0 [ 38.875695] __split_vma+0x5af/0x950 [ 38.876143] ? __pfx___split_vma+0x10/0x10 [ 38.876648] ? find_held_lock+0x2c/0x110 [ 38.877139] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.877670] ? lock_is_held_type+0x9f/0x120 [ 38.878182] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.878753] ? mtree_range_walk+0x632/0x900 [ 38.879278] ? mas_walk+0x5c7/0x7c0 [ 38.879748] do_vmi_munmap+0x1f1/0x2b0 [ 38.880212] mmap_region+0x1f9/0x2660 [ 38.880664] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.881148] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.881819] ? __pfx_lock_acquire+0x10/0x10 [ 38.882319] ? __pfx_mmap_region+0x10/0x10 [ 38.882817] ? security_mmap_addr+0x7d/0xa0 [ 38.883318] ? get_unmapped_area+0x1f5/0x3f0 [ 38.883853] do_mmap+0x854/0xf00 [ 38.884267] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.884738] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.885275] ksys_mmap_pgoff+0x3af/0x500 [ 38.885754] do_syscall_64+0x3f/0x90 [ 38.886210] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.886825] RIP: 0033:0x7fa66e181d82 [ 38.887276] 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 [ 38.889370] RSP: 002b:00007ffd7ca24108 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.890257] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa66e181d82 [ 38.891078] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa66d5bb000 [ 38.891925] RBP: 00007fa66d5bb000 R08: 0000000000000009 R09: 0000000000001000 [ 38.892746] R10: 0000000000000812 R11: 0000000000000206 R12: 00005630b1c13ec0 [ 38.893571] R13: 00007ffd7ca24120 R14: 00007ffd7ca24150 R15: 00007ffd7ca244b0 [ 38.894406] [ 38.894694] [ 38.894905] Allocated by task 211: [ 38.895321] kasan_save_stack+0x22/0x50 [ 38.895826] kasan_set_track+0x25/0x30 [ 38.896310] __kasan_slab_alloc+0x59/0x70 [ 38.896830] kmem_cache_alloc+0x16b/0x370 [ 38.897338] vm_area_dup+0x20/0x160 [ 38.897787] __split_vma+0x170/0x950 [ 38.898248] split_vma+0xc6/0x110 [ 38.898679] mprotect_fixup+0x8d2/0xb30 [ 38.899168] do_mprotect_pkey+0x87e/0xd40 [ 38.899698] __x64_sys_mprotect+0x78/0xc0 [ 38.900209] do_syscall_64+0x3f/0x90 [ 38.900688] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.901314] [ 38.901532] Freed by task 13: [ 38.901912] kasan_save_stack+0x22/0x50 [ 38.902399] kasan_set_track+0x25/0x30 [ 38.902885] kasan_save_free_info+0x2b/0x50 [ 38.903408] __kasan_slab_free+0x10a/0x190 [ 38.903951] kmem_cache_free+0x10d/0x4d0 [ 38.904453] rcu_core+0x8c8/0x2860 [ 38.904889] __do_softirq+0x1b7/0x7d4 [ 38.905365] [ 38.905581] Last potentially related work creation: [ 38.906154] kasan_save_stack+0x22/0x50 [ 38.906651] __kasan_record_aux_stack+0x8e/0xa0 [ 38.907211] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.907861] remove_vma+0x139/0x170 [ 38.908310] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.908923] do_vmi_munmap+0x1f1/0x2b0 [ 38.909400] __vm_munmap+0x138/0x3a0 [ 38.909862] __x64_sys_munmap+0x59/0x80 [ 38.910353] do_syscall_64+0x3f/0x90 [ 38.910825] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.911456] [ 38.911685] The buggy address belongs to the object at ffff88800e920e80 [ 38.911685] which belongs to the cache vm_area_struct of size 168 [ 38.913129] The buggy address is located 88 bytes inside of [ 38.913129] freed 168-byte region [ffff88800e920e80, ffff88800e920f28) [ 38.914512] [ 38.914726] The buggy address belongs to the physical page: [ 38.915369] page:000000009ce345a6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe920 [ 38.916452] memcg:ffff88800ddfa301 [ 38.916872] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.917563] page_type: 0xffffffff() [ 38.918003] raw: 0100000000000200 ffff8880087a0c80 ffffea00003936c0 dead000000000005 [ 38.918903] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ddfa301 [ 38.919816] page dumped because: kasan: bad access detected [ 38.920457] [ 38.920672] Memory state around the buggy address: [ 38.921243] ffff88800e920d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.922090] ffff88800e920e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 38.922929] >ffff88800e920e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.923793] ^ [ 38.924488] ffff88800e920f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 38.925305] ffff88800e920f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.926125] ================================================================== [ 38.927065] Disabling lock debugging due to kernel taint [ 41.764527] BUG: Bad rss-counter state mm:00000000ca1a12f5 type:MM_FILEPAGES val:33 [ 41.766000] BUG: Bad rss-counter state mm:00000000ca1a12f5 type:MM_ANONPAGES val:22 [ 42.184678] BUG: Bad rss-counter state mm:00000000fc892ccc type:MM_FILEPAGES val:33 [ 42.185706] BUG: Bad rss-counter state mm:00000000fc892ccc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40425' (ECDSA) to the list of known hosts. 2023/06/21 00:01:45 fuzzer started 2023/06/21 00:01:46 dialing manager at localhost:36067 2023/06/21 00:01:46 checking machine... 2023/06/21 00:01:46 checking revisions... [ 43.023851] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:01:46 testing simple program... [ 43.074506] cgroup: Unknown subsys name 'net' [ 43.124063] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:01:45 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=000000000000000c RCX=0000000000000000 RDX=ffff888015e39b40 RSI=ffffffff8217bb8b RDI=ffffffff85d3d350 RBP=00007fff1cdac10c RSP=ffff88801a00fc88 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff88801a00fe10 R13=000000000000000c R14=ffff88801a00fe10 R15=00007fff1cdac10c RIP=ffffffff814c089b 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 00007f2ac9b60900 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=00007fff1cdad000 CR3=000000001bef6000 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=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 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=00007fe5b8b70020 CR3=0000000016bda000 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=2035343a31303a3030203132206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035343a31303a3030203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000