syzkaller login: [ 38.755325] BUG: Bad rss-counter state mm:000000005a07b18f type:MM_FILEPAGES val:33 [ 38.756867] BUG: Bad rss-counter state mm:000000005a07b18f type:MM_ANONPAGES val:22 [ 38.882235] ================================================================== [ 38.883192] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.883691] Read of size 8 at addr ffff88800e3f7310 by task sshd/219 [ 38.884099] [ 38.884218] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.884758] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.885279] Call Trace: [ 38.885453] [ 38.885607] dump_stack_lvl+0x91/0xf0 [ 38.885874] print_report+0xcc/0x620 [ 38.886141] ? __virt_addr_valid+0x102/0x340 [ 38.886437] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.886780] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.887120] kasan_report+0xbe/0xf0 [ 38.887378] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.887712] vma_interval_tree_remove+0xc75/0xec0 [ 38.888037] vma_prepare+0xc54/0x11a0 [ 38.888296] __split_vma+0x5af/0x950 [ 38.888551] ? __pfx___split_vma+0x10/0x10 [ 38.888836] ? find_held_lock+0x2c/0x110 [ 38.889117] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.889422] ? lock_is_held_type+0x9f/0x120 [ 38.889714] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.890040] ? mtree_range_walk+0x632/0x900 [ 38.890340] ? mas_walk+0x5c7/0x7c0 [ 38.890598] do_vmi_munmap+0x1f1/0x2b0 [ 38.890864] mmap_region+0x1f9/0x2660 [ 38.891131] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.891409] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.891793] ? __pfx_lock_acquire+0x10/0x10 [ 38.892084] ? __pfx_mmap_region+0x10/0x10 [ 38.892375] ? security_mmap_addr+0x7d/0xa0 [ 38.892665] ? get_unmapped_area+0x1f5/0x3f0 [ 38.892964] do_mmap+0x854/0xf00 [ 38.893204] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.893471] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.893776] ksys_mmap_pgoff+0x3af/0x500 [ 38.894051] do_syscall_64+0x3f/0x90 [ 38.894316] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.894667] RIP: 0033:0x7fd246be7d82 [ 38.894924] 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 [ 38.896072] RSP: 002b:00007fff4e20c8d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.896570] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd246be7d82 [ 38.897032] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd246021000 [ 38.897491] RBP: 00007fd246021000 R08: 0000000000000009 R09: 0000000000001000 [ 38.897948] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ee1a71bd90 [ 38.898409] R13: 00007fff4e20c8f0 R14: 00007fff4e20c920 R15: 00007fff4e20cc80 [ 38.898875] [ 38.899035] [ 38.899153] Allocated by task 212: [ 38.899383] kasan_save_stack+0x22/0x50 [ 38.899656] kasan_set_track+0x25/0x30 [ 38.899922] __kasan_slab_alloc+0x59/0x70 [ 38.900206] kmem_cache_alloc+0x16b/0x370 [ 38.900484] vm_area_dup+0x20/0x160 [ 38.900730] __split_vma+0x170/0x950 [ 38.900982] split_vma+0xc6/0x110 [ 38.901221] mprotect_fixup+0x8d2/0xb30 [ 38.901497] do_mprotect_pkey+0x87e/0xd40 [ 38.901780] __x64_sys_mprotect+0x78/0xc0 [ 38.902062] do_syscall_64+0x3f/0x90 [ 38.902320] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.902669] [ 38.902787] Freed by task 212: [ 38.903019] kasan_save_stack+0x22/0x50 [ 38.903310] kasan_set_track+0x25/0x30 [ 38.903614] kasan_save_free_info+0x2b/0x50 [ 38.903932] __kasan_slab_free+0x10a/0x190 [ 38.904263] kmem_cache_free+0x10d/0x4d0 [ 38.904577] rcu_core+0x8c8/0x2860 [ 38.904843] __do_softirq+0x1b7/0x7d4 [ 38.905127] [ 38.905258] Last potentially related work creation: [ 38.905603] kasan_save_stack+0x22/0x50 [ 38.905897] __kasan_record_aux_stack+0x8e/0xa0 [ 38.906236] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.906626] remove_vma+0x139/0x170 [ 38.906899] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.907248] do_vmi_munmap+0x1f1/0x2b0 [ 38.907537] __vm_munmap+0x138/0x3a0 [ 38.907815] __x64_sys_munmap+0x59/0x80 [ 38.908109] do_syscall_64+0x3f/0x90 [ 38.908390] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.908777] [ 38.908904] Second to last potentially related work creation: [ 38.909311] kasan_save_stack+0x22/0x50 [ 38.909611] __kasan_record_aux_stack+0x8e/0xa0 [ 38.909955] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.910340] remove_vma+0x139/0x170 [ 38.910604] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.910953] do_vmi_munmap+0x1f1/0x2b0 [ 38.911234] __vm_munmap+0x138/0x3a0 [ 38.911506] elf_map+0x26f/0x310 [ 38.911771] load_elf_binary+0xd82/0x5030 [ 38.912087] bprm_execve+0x803/0x1940 [ 38.912365] do_execveat_common+0x734/0x8e0 [ 38.912673] __x64_sys_execve+0x93/0xc0 [ 38.912963] do_syscall_64+0x3f/0x90 [ 38.913243] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.913621] [ 38.913743] The buggy address belongs to the object at ffff88800e3f72b8 [ 38.913743] which belongs to the cache vm_area_struct of size 168 [ 38.914628] The buggy address is located 88 bytes inside of [ 38.914628] freed 168-byte region [ffff88800e3f72b8, ffff88800e3f7360) [ 38.915491] [ 38.915623] The buggy address belongs to the physical page: [ 38.916006] page:000000001ab9eb75 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800e3f71d0 pfn:0xe3f7 [ 38.916735] memcg:ffff88800db82301 [ 38.917002] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.917388] page_type: 0xffffffff() [ 38.917647] raw: 0100000000000200 ffff8880087a0c80 ffffea0000597cc0 0000000000000006 [ 38.918201] raw: ffff88800e3f71d0 000000008011000b 00000001ffffffff ffff88800db82301 [ 38.918749] page dumped because: kasan: bad access detected [ 38.919149] [ 38.919272] Memory state around the buggy address: [ 38.919611] ffff88800e3f7200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.920119] ffff88800e3f7280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.920633] >ffff88800e3f7300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.921134] ^ [ 38.921408] ffff88800e3f7380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.921920] ffff88800e3f7400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 38.922424] ================================================================== [ 38.922995] Disabling lock debugging due to kernel taint [ 41.398455] BUG: Bad rss-counter state mm:00000000e2edf5ff type:MM_FILEPAGES val:33 [ 41.399714] BUG: Bad rss-counter state mm:00000000e2edf5ff type:MM_ANONPAGES val:22 [ 41.969229] BUG: Bad rss-counter state mm:00000000656b788d type:MM_FILEPAGES val:33 [ 41.970201] BUG: Bad rss-counter state mm:00000000656b788d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44253' (ECDSA) to the list of known hosts. 2023/06/20 13:33:49 fuzzer started 2023/06/20 13:33:50 dialing manager at localhost:36067 2023/06/20 13:33:50 checking machine... 2023/06/20 13:33:50 checking revisions... [ 42.696431] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:33:50 testing simple program... [ 42.753118] cgroup: Unknown subsys name 'net' [ 42.804646] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:33:49 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000053 RCX=0000000000000000 RDX=ffff888015c60000 RSI=ffff88800e998800 RDI=0000000000000010 RBP=ffff88800e998853 RSP=ffff888015c5f870 R8 =0000000000000006 R9 =ffff88800e998800 R10=ffff88800e998852 R11=0000000000000000 R12=ffff88800e998800 R13=0000000000000001 R14=ffff88800e998852 R15=ffff88801c75ec80 RIP=ffffffff814c0434 RFL=00000293 [--S-A-C] 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 00007f430a88b900 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=00007f4309c7eb70 CR3=0000000008c76000 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=00000000000000000000000000000000 XMM01=e1313eaa0d161480e94406ea91caddae XMM02=eff9b2d0a8fce9cb000000000011bcf8 XMM03=2c67c8bc2e329bc3000000000011be20 XMM04=896d5d7402f5579c00000000000ae988 XMM05=7618f079be96bfa600000000001347a8 XMM06=806171799158d9670000000000133280 XMM07=fb795ef6d65770560000000000122048 XMM08=2c67c8bc2e329bc3000000000011be20 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff11002b97e25 RSI=ffff888015cbf328 RDI=ffff888015cbf128 RBP=ffff8880084c6140 RSP=ffff888015cbf068 R8 =0000000000000001 R9 =ffff888015cbf118 R10=0000000000038001 R11=0000000000021eef R12=ffff888015cbf138 R13=ffff888015cbf120 R14=ffff888015cbf328 R15=ffff888015cbf0d8 RIP=ffffffff81131266 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 00007f3ccb9bb900 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=00007f3ccb974008 CR3=000000001a380000 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=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