syzkaller login: [ 30.521333] BUG: Bad rss-counter state mm:00000000b0f0e0c2 type:MM_FILEPAGES val:33 [ 30.522627] BUG: Bad rss-counter state mm:00000000b0f0e0c2 type:MM_ANONPAGES val:22 [ 30.677452] ================================================================== [ 30.678667] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.679769] Read of size 8 at addr ffff88800e23dd08 by task sshd/221 [ 30.680854] [ 30.681104] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.681911] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.682840] Call Trace: [ 30.683146] [ 30.683417] dump_stack_lvl+0x91/0xf0 [ 30.683891] print_report+0xcc/0x620 [ 30.684347] ? __virt_addr_valid+0x102/0x340 [ 30.684861] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.685439] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.686020] kasan_report+0xbe/0xf0 [ 30.686475] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.687059] vma_interval_tree_remove+0xc75/0xec0 [ 30.687644] vma_prepare+0xc54/0x11a0 [ 30.688101] __split_vma+0x5af/0x950 [ 30.688650] ? __pfx___split_vma+0x10/0x10 [ 30.689275] ? find_held_lock+0x2c/0x110 [ 30.689884] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.690544] ? lock_is_held_type+0x9f/0x120 [ 30.691178] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.691922] ? mtree_range_walk+0x632/0x900 [ 30.692579] ? mas_walk+0x5c7/0x7c0 [ 30.693142] do_vmi_munmap+0x1f1/0x2b0 [ 30.693722] mmap_region+0x1f9/0x2660 [ 30.694285] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.694877] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.695722] ? __pfx_lock_acquire+0x10/0x10 [ 30.696345] ? __pfx_mmap_region+0x10/0x10 [ 30.696964] ? security_mmap_addr+0x7d/0xa0 [ 30.697582] ? get_unmapped_area+0x1f5/0x3f0 [ 30.698229] do_mmap+0x854/0xf00 [ 30.698741] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.699319] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.699986] ksys_mmap_pgoff+0x3af/0x500 [ 30.700579] do_syscall_64+0x3f/0x90 [ 30.701143] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.701900] RIP: 0033:0x7f5d22433d82 [ 30.702441] 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 [ 30.704944] RSP: 002b:00007ffc0b43cfb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.705967] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5d22433d82 [ 30.706928] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5d2186d000 [ 30.707880] RBP: 00007f5d2186d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.708825] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c1a025ab20 [ 30.709772] R13: 00007ffc0b43cfd0 R14: 00007ffc0b43d000 R15: 00007ffc0b43d360 [ 30.710749] [ 30.711079] [ 30.711318] Allocated by task 214: [ 30.711818] kasan_save_stack+0x22/0x50 [ 30.712400] kasan_set_track+0x25/0x30 [ 30.712971] __kasan_slab_alloc+0x59/0x70 [ 30.713573] kmem_cache_alloc+0x16b/0x370 [ 30.714176] vm_area_dup+0x20/0x160 [ 30.714708] __split_vma+0x170/0x950 [ 30.715244] split_vma+0xc6/0x110 [ 30.715760] mprotect_fixup+0x8d2/0xb30 [ 30.716306] do_mprotect_pkey+0x87e/0xd40 [ 30.716804] __x64_sys_mprotect+0x78/0xc0 [ 30.717299] do_syscall_64+0x3f/0x90 [ 30.717751] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.718365] [ 30.718572] Freed by task 214: [ 30.718942] kasan_save_stack+0x22/0x50 [ 30.719423] kasan_set_track+0x25/0x30 [ 30.719906] kasan_save_free_info+0x2b/0x50 [ 30.720410] __kasan_slab_free+0x10a/0x190 [ 30.720919] kmem_cache_free+0x10d/0x4d0 [ 30.721515] rcu_core+0x8c8/0x2860 [ 30.721975] __do_softirq+0x1b7/0x7d4 [ 30.722469] [ 30.722680] Last potentially related work creation: [ 30.723279] kasan_save_stack+0x22/0x50 [ 30.723790] __kasan_record_aux_stack+0x8e/0xa0 [ 30.724390] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.725141] remove_vma+0x139/0x170 [ 30.725663] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.726295] do_vmi_munmap+0x1f1/0x2b0 [ 30.726837] __vm_munmap+0x138/0x3a0 [ 30.727374] __x64_sys_munmap+0x59/0x80 [ 30.727957] do_syscall_64+0x3f/0x90 [ 30.728493] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.729201] [ 30.729440] Second to last potentially related work creation: [ 30.730199] kasan_save_stack+0x22/0x50 [ 30.730753] __kasan_record_aux_stack+0x8e/0xa0 [ 30.731408] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.732185] remove_vma+0x139/0x170 [ 30.732650] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.733218] do_vmi_munmap+0x1f1/0x2b0 [ 30.733719] __vm_munmap+0x138/0x3a0 [ 30.734207] elf_map+0x26f/0x310 [ 30.734653] load_elf_binary+0xd82/0x5030 [ 30.735209] bprm_execve+0x803/0x1940 [ 30.735702] do_execveat_common+0x734/0x8e0 [ 30.736251] __x64_sys_execve+0x93/0xc0 [ 30.736768] do_syscall_64+0x3f/0x90 [ 30.737266] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.737918] [ 30.738139] The buggy address belongs to the object at ffff88800e23dcb0 [ 30.738139] which belongs to the cache vm_area_struct of size 168 [ 30.739664] The buggy address is located 88 bytes inside of [ 30.739664] freed 168-byte region [ffff88800e23dcb0, ffff88800e23dd58) [ 30.741096] [ 30.741315] The buggy address belongs to the physical page: [ 30.741994] page:000000002d63fe74 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe23d [ 30.743124] memcg:ffff888009900701 [ 30.743576] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.744252] page_type: 0xffffffff() [ 30.744726] raw: 0100000000000200 ffff8880087a0c80 ffffea00004ef580 dead000000000002 [ 30.745688] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009900701 [ 30.746624] page dumped because: kasan: bad access detected [ 30.747294] [ 30.747520] Memory state around the buggy address: [ 30.748111] ffff88800e23dc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.748976] ffff88800e23dc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.749842] >ffff88800e23dd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.750712] ^ [ 30.751166] ffff88800e23dd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.752054] ffff88800e23de00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.752924] ================================================================== [ 30.753878] Disabling lock debugging due to kernel taint [ 32.873730] BUG: Bad rss-counter state mm:0000000044159c95 type:MM_FILEPAGES val:33 [ 32.874953] BUG: Bad rss-counter state mm:0000000044159c95 type:MM_ANONPAGES val:22 [ 33.242637] BUG: Bad rss-counter state mm:00000000e83f4c4a type:MM_FILEPAGES val:33 [ 33.243634] BUG: Bad rss-counter state mm:00000000e83f4c4a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33751' (ECDSA) to the list of known hosts. 2023/06/20 17:15:22 fuzzer started 2023/06/20 17:15:22 dialing manager at localhost:36067 2023/06/20 17:15:22 checking machine... 2023/06/20 17:15:22 checking revisions... [ 33.966312] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:15:22 testing simple program... [ 34.021662] cgroup: Unknown subsys name 'net' [ 34.059982] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:15:22 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888016463680 RSI=000000000000001e RDI=ffff88800eb16280 RBP=dffffc0000000000 RSP=ffff8880165df8b8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0030733a745f6c65 R12=000000000000001e R13=ffff88800eb16280 R14=ffff88800893f308 R15=1ffff11002cbbf1d RIP=ffffffff814c0864 RFL=00000282 [--S----] 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 00007f2d5d586900 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=00007f2d5c996bd0 CR3=000000000d7ac000 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=0a2cf5033f9049b7e34c801393808f0e XMM02=ec2efd57dc4c00df000000000011cc30 XMM03=baefb90df7416194000000000011cd00 XMM04=b9dd4c4d9e104f6d00000000000ae988 XMM05=9ef735ea9bf5fd4a0000000000133a78 XMM06=59d5b690e0af863b0000000000132910 XMM07=fb795ef6d65770560000000000121440 XMM08=2c67c8bc2e329bc3000000000011cca0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000452 RCX=00000000000000e1 RDX=00007ffe1b9f3150 RSI=0000000000000452 RDI=0000000000000008 RBP=00007ffe1b9f3150 RSP=00007ffe1b9f3010 R8 =00007ffe1b9f3024 R9 =00007ffe1b9f2ee0 R10=00007f94418e6a57 R11=0000000000000000 R12=00007ffe1b9f3150 R13=0000000000000008 R14=0000000000000000 R15=0000000000000000 RIP=00007f94418d09e2 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f9440d96900 00000000 00000000 GS =0000 0000000000000000 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=00007f944134d618 CR3=000000000eab8000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=8661ce15fbac710beb9a600448b18a02 XMM04=bbfa00269461b9cfaf94b767ed7f437d XMM05=0000ff00000000000000000000000000 XMM06=866100159461710baf946004487f4302 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000