syzkaller login: [ 49.159745] BUG: Bad rss-counter state mm:00000000969b0057 type:MM_FILEPAGES val:33 [ 49.161139] BUG: Bad rss-counter state mm:00000000969b0057 type:MM_ANONPAGES val:22 [ 49.316735] ================================================================== [ 49.317668] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 49.318620] Read of size 8 at addr ffff88800e16a140 by task sshd/220 [ 49.319400] [ 49.319620] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 49.320627] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 49.321658] Call Trace: [ 49.321985] <TASK> [ 49.322286] dump_stack_lvl+0x91/0xf0 [ 49.322786] print_report+0xcc/0x620 [ 49.323286] ? __virt_addr_valid+0x102/0x340 [ 49.323897] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.324538] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.325171] kasan_report+0xbe/0xf0 [ 49.325657] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.326301] vma_interval_tree_remove+0xc75/0xec0 [ 49.326907] vma_prepare+0xc54/0x11a0 [ 49.327393] __split_vma+0x5af/0x950 [ 49.327894] ? __pfx___split_vma+0x10/0x10 [ 49.328433] ? find_held_lock+0x2c/0x110 [ 49.328963] do_vmi_align_munmap+0x2ba/0x11f0 [ 49.329543] ? lock_is_held_type+0x9f/0x120 [ 49.330083] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 49.330694] ? mtree_range_walk+0x632/0x900 [ 49.331260] ? mas_walk+0x5c7/0x7c0 [ 49.331754] do_vmi_munmap+0x1f1/0x2b0 [ 49.332260] mmap_region+0x1f9/0x2660 [ 49.332748] ? vm_mmap_pgoff+0x15c/0x3a0 [ 49.333281] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 49.334008] ? __pfx_lock_acquire+0x10/0x10 [ 49.334547] ? __pfx_mmap_region+0x10/0x10 [ 49.335091] ? security_mmap_addr+0x7d/0xa0 [ 49.335628] ? get_unmapped_area+0x1f5/0x3f0 [ 49.336208] do_mmap+0x854/0xf00 [ 49.336656] vm_mmap_pgoff+0x1a6/0x3a0 [ 49.337161] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 49.337737] ksys_mmap_pgoff+0x3af/0x500 [ 49.338254] do_syscall_64+0x3f/0x90 [ 49.338735] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.339387] RIP: 0033:0x7fc849bb1d82 [ 49.339868] 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 [ 49.342029] RSP: 002b:00007fffbed00b88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 49.342947] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc849bb1d82 [ 49.343821] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc848feb000 [ 49.344681] RBP: 00007fc848feb000 R08: 0000000000000009 R09: 0000000000001000 [ 49.345544] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558444033ec0 [ 49.346411] R13: 00007fffbed00ba0 R14: 00007fffbed00bd0 R15: 00007fffbed00f30 [ 49.347278] </TASK> [ 49.347569] [ 49.347802] Allocated by task 213: [ 49.348237] kasan_save_stack+0x22/0x50 [ 49.348756] kasan_set_track+0x25/0x30 [ 49.349271] __kasan_slab_alloc+0x59/0x70 [ 49.349806] kmem_cache_alloc+0x16b/0x370 [ 49.350328] vm_area_dup+0x20/0x160 [ 49.350799] __split_vma+0x170/0x950 [ 49.351279] split_vma+0xc6/0x110 [ 49.351745] mprotect_fixup+0x8d2/0xb30 [ 49.352248] do_mprotect_pkey+0x87e/0xd40 [ 49.352785] __x64_sys_mprotect+0x78/0xc0 [ 49.353313] do_syscall_64+0x3f/0x90 [ 49.353789] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.354439] [ 49.354654] Freed by task 213: [ 49.355050] kasan_save_stack+0x22/0x50 [ 49.355556] kasan_set_track+0x25/0x30 [ 49.356070] kasan_save_free_info+0x2b/0x50 [ 49.356601] __kasan_slab_free+0x10a/0x190 [ 49.357142] kmem_cache_free+0x10d/0x4d0 [ 49.357658] rcu_core+0x8c8/0x2860 [ 49.358105] __do_softirq+0x1b7/0x7d4 [ 49.358587] [ 49.358807] Last potentially related work creation: [ 49.359407] kasan_save_stack+0x22/0x50 [ 49.359924] __kasan_record_aux_stack+0x8e/0xa0 [ 49.360506] __call_rcu_common.constprop.0+0x6a/0xb90 [ 49.361157] remove_vma+0x139/0x170 [ 49.361611] do_vmi_align_munmap+0xd4a/0x11f0 [ 49.362172] do_vmi_munmap+0x1f1/0x2b0 [ 49.362663] __vm_munmap+0x138/0x3a0 [ 49.363129] __x64_sys_munmap+0x59/0x80 [ 49.363630] do_syscall_64+0x3f/0x90 [ 49.364127] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.364778] [ 49.364995] Second to last potentially related work creation: [ 49.365685] kasan_save_stack+0x22/0x50 [ 49.366193] __kasan_record_aux_stack+0x8e/0xa0 [ 49.366775] __call_rcu_common.constprop.0+0x6a/0xb90 [ 49.367426] remove_vma+0x139/0x170 [ 49.367887] do_vmi_align_munmap+0xd4a/0x11f0 [ 49.368455] do_vmi_munmap+0x1f1/0x2b0 [ 49.368948] mmap_region+0x1f9/0x2660 [ 49.369433] do_mmap+0x854/0xf00 [ 49.369869] vm_mmap_pgoff+0x1a6/0x3a0 [ 49.370364] ksys_mmap_pgoff+0x3af/0x500 [ 49.370866] do_syscall_64+0x3f/0x90 [ 49.371346] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.371994] [ 49.372209] The buggy address belongs to the object at ffff88800e16a0e8 [ 49.372209] which belongs to the cache vm_area_struct of size 168 [ 49.373672] The buggy address is located 88 bytes inside of [ 49.373672] freed 168-byte region [ffff88800e16a0e8, ffff88800e16a190) [ 49.375083] [ 49.375306] The buggy address belongs to the physical page: [ 49.375984] page:0000000018c095c4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe16a [ 49.377079] memcg:ffff88800dbd2f01 [ 49.377509] flags: 0x100000000000200(slab|node=0|zone=1) [ 49.378161] page_type: 0xffffffff() [ 49.378610] raw: 0100000000000200 ffff88800879fc80 ffffea0000380080 dead000000000004 [ 49.379540] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dbd2f01 [ 49.380462] page dumped because: kasan: bad access detected [ 49.381126] [ 49.381346] Memory state around the buggy address: [ 49.381932] ffff88800e16a000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 49.382801] ffff88800e16a080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 49.383678] >ffff88800e16a100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 49.384530] ^ [ 49.385177] ffff88800e16a180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 49.386045] ffff88800e16a200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 49.386910] ================================================================== [ 49.388226] Disabling lock debugging due to kernel taint [ 51.252755] BUG: Bad rss-counter state mm:000000007bc226b9 type:MM_FILEPAGES val:33 [ 51.254087] BUG: Bad rss-counter state mm:000000007bc226b9 type:MM_ANONPAGES val:22 [ 51.791866] BUG: Bad rss-counter state mm:000000005b73cd72 type:MM_FILEPAGES val:33 [ 51.793143] BUG: Bad rss-counter state mm:000000005b73cd72 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62720' (ECDSA) to the list of known hosts. 2023/06/20 05:46:10 fuzzer started 2023/06/20 05:46:11 dialing manager at localhost:44161 2023/06/20 05:46:11 checking machine... 2023/06/20 05:46:11 checking revisions... [ 52.491316] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:46:11 testing simple program... [ 52.543105] cgroup: Unknown subsys name 'net' [ 52.581179] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:45:53 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888013fbf2e0 RCX=ffffffff86137501 RDX=1ffff110027f7e5e RSI=ffffffff8180c585 RDI=ffff888013fbf2f0 RBP=ffff888013fbf2b0 RSP=ffff888013fbf1f8 R8 =ffffffff8613751e R9 =ffff888013fbf258 R10=0000000000038001 R11=0000000000020d8a R12=ffff888013fbf2e0 R13=0000000000000000 R14=ffff888016c43680 R15=0000000000092cc0 RIP=ffffffff813ad446 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 00007f28d6542900 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=00007f28d5a63000 CR3=000000000682c000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=94f54c2f7a70c7ff00000000000ae988 XMM05=19137247e720d1390000000000135e38 XMM06=beed88bd6e2993600000000000134bd8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff812d869a RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff110027f6e87 RSP=ffff888013fb7428 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff8560b640 R13=ffffffff814c84f5 R14=ffffffff85652a88 R15=ffff88801834b130 RIP=ffffffff812d86a2 RFL=00000247 [---Z-PC] 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 00007fb10143d900 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=00007ffeb1611000 CR3=000000000f1ca000 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