syzkaller login: [ 35.167991] BUG: Bad rss-counter state mm:000000002c6d8356 type:MM_FILEPAGES val:33 [ 35.168993] BUG: Bad rss-counter state mm:000000002c6d8356 type:MM_ANONPAGES val:22 [ 35.333040] ================================================================== [ 35.333932] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.334882] Read of size 8 at addr ffff88800dbc1228 by task sshd/218 [ 35.335668] [ 35.335882] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.336888] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.337874] Call Trace: [ 35.338193] [ 35.338482] dump_stack_lvl+0x91/0xf0 [ 35.338993] print_report+0xcc/0x620 [ 35.339489] ? __virt_addr_valid+0x102/0x340 [ 35.340070] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.340694] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.341321] kasan_report+0xbe/0xf0 [ 35.341801] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.342418] vma_interval_tree_remove+0xc75/0xec0 [ 35.343025] vma_prepare+0xc54/0x11a0 [ 35.343509] __split_vma+0x5af/0x950 [ 35.343998] ? __pfx___split_vma+0x10/0x10 [ 35.344523] ? find_held_lock+0x2c/0x110 [ 35.345047] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.345605] ? lock_is_held_type+0x9f/0x120 [ 35.346144] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.346747] ? mtree_range_walk+0x632/0x900 [ 35.347298] ? mas_walk+0x5c7/0x7c0 [ 35.347770] do_vmi_munmap+0x1f1/0x2b0 [ 35.348280] mmap_region+0x1f9/0x2660 [ 35.348759] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.349273] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.349987] ? __pfx_lock_acquire+0x10/0x10 [ 35.350517] ? __pfx_mmap_region+0x10/0x10 [ 35.351050] ? security_mmap_addr+0x7d/0xa0 [ 35.351577] ? get_unmapped_area+0x1f5/0x3f0 [ 35.352141] do_mmap+0x854/0xf00 [ 35.352583] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.353083] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.353651] ksys_mmap_pgoff+0x3af/0x500 [ 35.354166] do_syscall_64+0x3f/0x90 [ 35.354638] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.355285] RIP: 0033:0x7ff0a5da2d82 [ 35.355736] 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 [ 35.357888] RSP: 002b:00007ffd2f1e7598 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.358785] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff0a5da2d82 [ 35.359632] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff0a51dc000 [ 35.360480] RBP: 00007ff0a51dc000 R08: 0000000000000009 R09: 0000000000001000 [ 35.361316] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b61b22aec0 [ 35.362153] R13: 00007ffd2f1e75b0 R14: 00007ffd2f1e75e0 R15: 00007ffd2f1e7940 [ 35.362999] [ 35.363291] [ 35.363512] Allocated by task 211: [ 35.363955] kasan_save_stack+0x22/0x50 [ 35.364457] kasan_set_track+0x25/0x30 [ 35.364950] __kasan_slab_alloc+0x59/0x70 [ 35.365476] kmem_cache_alloc+0x16b/0x370 [ 35.365993] vm_area_dup+0x20/0x160 [ 35.366443] __split_vma+0x170/0x950 [ 35.366913] split_vma+0xc6/0x110 [ 35.367350] mprotect_fixup+0x8d2/0xb30 [ 35.367851] do_mprotect_pkey+0x87e/0xd40 [ 35.368377] __x64_sys_mprotect+0x78/0xc0 [ 35.368902] do_syscall_64+0x3f/0x90 [ 35.369383] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.370025] [ 35.370240] Freed by task 202: [ 35.370630] kasan_save_stack+0x22/0x50 [ 35.371130] kasan_set_track+0x25/0x30 [ 35.371626] kasan_save_free_info+0x2b/0x50 [ 35.372174] __kasan_slab_free+0x10a/0x190 [ 35.372712] kmem_cache_free+0x10d/0x4d0 [ 35.373226] rcu_core+0x8c8/0x2860 [ 35.373667] __do_softirq+0x1b7/0x7d4 [ 35.374144] [ 35.374361] Last potentially related work creation: [ 35.374940] kasan_save_stack+0x22/0x50 [ 35.375439] __kasan_record_aux_stack+0x8e/0xa0 [ 35.376024] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.376668] remove_vma+0x139/0x170 [ 35.377115] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.377670] do_vmi_munmap+0x1f1/0x2b0 [ 35.378150] __vm_munmap+0x138/0x3a0 [ 35.378612] __x64_sys_munmap+0x59/0x80 [ 35.379103] do_syscall_64+0x3f/0x90 [ 35.379585] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.380246] [ 35.380461] Second to last potentially related work creation: [ 35.381138] kasan_save_stack+0x22/0x50 [ 35.381640] __kasan_record_aux_stack+0x8e/0xa0 [ 35.382206] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.382842] remove_vma+0x139/0x170 [ 35.383290] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.383841] do_vmi_munmap+0x1f1/0x2b0 [ 35.384338] __vm_munmap+0x138/0x3a0 [ 35.384801] elf_map+0x26f/0x310 [ 35.385245] load_elf_binary+0xd82/0x5030 [ 35.385766] bprm_execve+0x803/0x1940 [ 35.386233] do_execveat_common+0x734/0x8e0 [ 35.386756] __x64_sys_execve+0x93/0xc0 [ 35.387244] do_syscall_64+0x3f/0x90 [ 35.387717] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.388359] [ 35.388578] The buggy address belongs to the object at ffff88800dbc11d0 [ 35.388578] which belongs to the cache vm_area_struct of size 168 [ 35.390019] The buggy address is located 88 bytes inside of [ 35.390019] freed 168-byte region [ffff88800dbc11d0, ffff88800dbc1278) [ 35.391390] [ 35.391600] The buggy address belongs to the physical page: [ 35.392265] page:000000007bfb6853 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdbc1 [ 35.393325] memcg:ffff88800dfba401 [ 35.393741] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.394370] page_type: 0xffffffff() [ 35.394817] raw: 0100000000000200 ffff8880087a0c80 ffffea0000405380 dead000000000008 [ 35.395713] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dfba401 [ 35.396606] page dumped because: kasan: bad access detected [ 35.397252] [ 35.397466] Memory state around the buggy address: [ 35.398037] ffff88800dbc1100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.398872] ffff88800dbc1180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 35.399707] >ffff88800dbc1200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 35.400561] ^ [ 35.401106] ffff88800dbc1280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 35.401942] ffff88800dbc1300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 35.402771] ================================================================== [ 35.403716] Disabling lock debugging due to kernel taint [ 36.860559] BUG: Bad rss-counter state mm:00000000c1fa29bf type:MM_FILEPAGES val:33 [ 36.861131] BUG: Bad rss-counter state mm:00000000c1fa29bf type:MM_ANONPAGES val:22 [ 37.196928] BUG: Bad rss-counter state mm:00000000a5621185 type:MM_FILEPAGES val:33 [ 37.197459] BUG: Bad rss-counter state mm:00000000a5621185 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50911' (ECDSA) to the list of known hosts. 2023/06/20 12:54:57 fuzzer started 2023/06/20 12:54:57 dialing manager at localhost:36067 2023/06/20 12:54:57 checking machine... 2023/06/20 12:54:57 checking revisions... [ 37.817665] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:54:57 testing simple program... [ 37.868290] cgroup: Unknown subsys name 'net' [ 37.909258] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:54:57 Registers: info registers vcpu 0 RAX=00000000ffffffff RBX=0000000000000002 RCX=0000000000000003 RDX=1ffffd4000081046 RSI=ffffea0000408100 RDI=ffffea0000408230 RBP=ffffea0000408200 RSP=ffff88801773f778 R8 =0000000000000000 R9 =ffff88807ffdc690 R10=ffffea0000408030 R11=0000000000010200 R12=0000000000000003 R13=ffffea0000408100 R14=ffffea0000408000 R15=ffff88807ffdc500 RIP=ffffffff81789ced RFL=00000046 [---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 00007f4146b6c900 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=00007ffe7c5fc000 CR3=000000000ed70000 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=00007fac6fe473c0 CR3=000000000c920000 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=b8d6e0bda92570b5c643ee4b6aadd4d4 XMM02=2c67c8bc2e329bc3000000000011b778 XMM03=fb795ef6d657705600000000001219a0 XMM04=b9dab67b79a3f93600000000000ae988 XMM05=751b9502027dc0b90000000000132c58 XMM06=9f2026070ccb968e0000000000131e30 XMM07=e042d86d42eb936e0000000000121c20 XMM08=e15831c68d3e91b1000000000011b7d8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000