syzkaller login: [ 35.922784] BUG: Bad rss-counter state mm:00000000b9bb3418 type:MM_FILEPAGES val:33 [ 35.923974] BUG: Bad rss-counter state mm:00000000b9bb3418 type:MM_ANONPAGES val:22 [ 35.963161] ================================================================== [ 35.964083] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.965053] Read of size 8 at addr ffff888017d98d08 by task sshd/219 [ 35.965831] [ 35.966047] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.967053] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.968041] Call Trace: [ 35.968359] [ 35.968671] dump_stack_lvl+0x91/0xf0 [ 35.969168] print_report+0xcc/0x620 [ 35.969653] ? __virt_addr_valid+0x102/0x340 [ 35.970206] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.970820] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.971443] kasan_report+0xbe/0xf0 [ 35.971923] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.972543] vma_interval_tree_remove+0xc75/0xec0 [ 35.973166] vma_prepare+0xc54/0x11a0 [ 35.973651] __split_vma+0x5af/0x950 [ 35.974126] ? __pfx___split_vma+0x10/0x10 [ 35.974661] ? find_held_lock+0x2c/0x110 [ 35.975186] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.975755] ? lock_is_held_type+0x9f/0x120 [ 35.976295] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.976928] ? mtree_range_walk+0x632/0x900 [ 35.977483] ? mas_walk+0x5c7/0x7c0 [ 35.977951] do_vmi_munmap+0x1f1/0x2b0 [ 35.978443] mmap_region+0x1f9/0x2660 [ 35.978925] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.979435] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.980146] ? __pfx_lock_acquire+0x10/0x10 [ 35.980684] ? __pfx_mmap_region+0x10/0x10 [ 35.981227] ? security_mmap_addr+0x7d/0xa0 [ 35.981764] ? get_unmapped_area+0x1f5/0x3f0 [ 35.982315] do_mmap+0x854/0xf00 [ 35.982754] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.983245] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.983809] ksys_mmap_pgoff+0x3af/0x500 [ 35.984313] do_syscall_64+0x3f/0x90 [ 35.984797] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.985445] RIP: 0033:0x7f8c1818fd82 [ 35.985903] 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 [ 35.988009] RSP: 002b:00007fffcfa23ae8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.988925] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8c1818fd82 [ 35.989770] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8c175c9000 [ 35.990620] RBP: 00007f8c175c9000 R08: 0000000000000009 R09: 0000000000001000 [ 35.991471] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562eb25efec0 [ 35.992319] R13: 00007fffcfa23b00 R14: 00007fffcfa23b30 R15: 00007fffcfa23e90 [ 35.993177] [ 35.993470] [ 35.993687] Allocated by task 212: [ 35.994118] kasan_save_stack+0x22/0x50 [ 35.994621] kasan_set_track+0x25/0x30 [ 35.995114] __kasan_slab_alloc+0x59/0x70 [ 35.995637] kmem_cache_alloc+0x16b/0x370 [ 35.996148] vm_area_dup+0x20/0x160 [ 35.996604] __split_vma+0x170/0x950 [ 35.997085] split_vma+0xc6/0x110 [ 35.997526] mprotect_fixup+0x8d2/0xb30 [ 35.998029] do_mprotect_pkey+0x87e/0xd40 [ 35.998548] __x64_sys_mprotect+0x78/0xc0 [ 35.999072] do_syscall_64+0x3f/0x90 [ 35.999548] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.000189] [ 36.000405] Freed by task 212: [ 36.000810] kasan_save_stack+0x22/0x50 [ 36.001313] kasan_set_track+0x25/0x30 [ 36.001833] kasan_save_free_info+0x2b/0x50 [ 36.002365] __kasan_slab_free+0x10a/0x190 [ 36.002892] kmem_cache_free+0x10d/0x4d0 [ 36.003402] rcu_core+0x8c8/0x2860 [ 36.003848] __do_softirq+0x1b7/0x7d4 [ 36.004396] [ 36.004616] Last potentially related work creation: [ 36.005229] kasan_save_stack+0x22/0x50 [ 36.005735] __kasan_record_aux_stack+0x8e/0xa0 [ 36.006318] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.006966] remove_vma+0x139/0x170 [ 36.007412] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.007971] do_vmi_munmap+0x1f1/0x2b0 [ 36.008456] __vm_munmap+0x138/0x3a0 [ 36.008928] __x64_sys_munmap+0x59/0x80 [ 36.009421] do_syscall_64+0x3f/0x90 [ 36.009891] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.010531] [ 36.010746] The buggy address belongs to the object at ffff888017d98cb0 [ 36.010746] which belongs to the cache vm_area_struct of size 168 [ 36.012206] The buggy address is located 88 bytes inside of [ 36.012206] freed 168-byte region [ffff888017d98cb0, ffff888017d98d58) [ 36.013603] [ 36.013817] The buggy address belongs to the physical page: [ 36.014462] page:000000008d20acd4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17d98 [ 36.015537] memcg:ffff88801a79ce01 [ 36.015961] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.016599] page_type: 0xffffffff() [ 36.017052] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.017960] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a79ce01 [ 36.018869] page dumped because: kasan: bad access detected [ 36.019538] [ 36.019751] Memory state around the buggy address: [ 36.020331] ffff888017d98c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 36.021194] ffff888017d98c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 36.022037] >ffff888017d98d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 36.022879] ^ [ 36.023314] ffff888017d98d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 36.024167] ffff888017d98e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 36.025013] ================================================================== [ 36.025999] Disabling lock debugging due to kernel taint [ 38.555641] BUG: Bad rss-counter state mm:000000001ba33e49 type:MM_FILEPAGES val:33 [ 38.556596] BUG: Bad rss-counter state mm:000000001ba33e49 type:MM_ANONPAGES val:22 [ 39.025542] BUG: Bad rss-counter state mm:000000000c6ce1cf type:MM_FILEPAGES val:33 [ 39.026731] BUG: Bad rss-counter state mm:000000000c6ce1cf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7903' (ECDSA) to the list of known hosts. 2023/06/19 18:54:22 fuzzer started 2023/06/19 18:54:22 dialing manager at localhost:44161 2023/06/19 18:54:22 checking machine... 2023/06/19 18:54:22 checking revisions... [ 39.662211] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:54:22 testing simple program... [ 39.709382] cgroup: Unknown subsys name 'net' [ 39.762847] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:54:16 Registers: info registers vcpu 0 RAX=0000001708689d1c RBX=0000000000000000 RCX=00000000000006e0 RDX=0000000000000017 RSI=ffff88806ce28140 RDI=000000000005406e RBP=ffff88806ce28140 RSP=ffff88806ce09ee0 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000f0873 R11=0000000000000001 R12=000000000005406e R13=0000000000000000 R14=0000000000000000 R15=ffff88806ce2b940 RIP=ffffffff811062a5 RFL=00000016 [----AP-] 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 00007f52200dd900 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=00007f52206950b0 CR3=0000000019d86000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff8450d49f RCX=ffffffff864bb001 RDX=1ffff1100d9e1359 RSI=0000000000000000 RDI=ffffffff8450d49f RBP=ffffffff8450d49f RSP=ffff88806cf09a20 R8 =ffffffff864bb032 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=00000000000b6cb2 R12=0000000000000001 R13=0000000000000000 R14=ffff888008d751c0 R15=ffff88800de5d080 RIP=ffffffff811fc772 RFL=00000287 [--S--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 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=00007fa2e34e10d0 CR3=000000000c600000 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=c9add83f36d573bc004baf8f8a456915 XMM02=0000000000120130ec2efd57dc4c00df XMM03=00000000001248d05c1a7ba94b7ec066 XMM04=766c41cd9517b5df00000000000ae988 XMM05=dfcdbad4f1609c370000000000134450 XMM06=2906d2be191ed15000000000001332b8 XMM07=e042d86d42eb936e0000000000124b50 XMM08=5c1a7ba94b7ec0660000000000120190 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000