syzkaller login: [ 30.900634] BUG: Bad rss-counter state mm:0000000015198802 type:MM_FILEPAGES val:33 [ 30.901646] BUG: Bad rss-counter state mm:0000000015198802 type:MM_ANONPAGES val:22 [ 31.064595] ================================================================== [ 31.065530] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.066507] Read of size 8 at addr ffff88800c724058 by task sshd/220 [ 31.067316] [ 31.067646] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.068743] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.069798] Call Trace: [ 31.070155] [ 31.070479] dump_stack_lvl+0x91/0xf0 [ 31.070995] print_report+0xcc/0x620 [ 31.071512] ? __virt_addr_valid+0x102/0x340 [ 31.072075] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.072750] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.073401] kasan_report+0xbe/0xf0 [ 31.073903] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.074562] vma_interval_tree_remove+0xc75/0xec0 [ 31.075203] vma_prepare+0xc54/0x11a0 [ 31.075714] __split_vma+0x5af/0x950 [ 31.076209] ? __pfx___split_vma+0x10/0x10 [ 31.076773] ? find_held_lock+0x2c/0x110 [ 31.077317] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.077908] ? lock_is_held_type+0x9f/0x120 [ 31.078485] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.079133] ? mtree_range_walk+0x632/0x900 [ 31.079725] ? mas_walk+0x5c7/0x7c0 [ 31.080231] do_vmi_munmap+0x1f1/0x2b0 [ 31.080753] mmap_region+0x1f9/0x2660 [ 31.081255] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.081802] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.082558] ? __pfx_lock_acquire+0x10/0x10 [ 31.083129] ? __pfx_mmap_region+0x10/0x10 [ 31.083684] ? security_mmap_addr+0x7d/0xa0 [ 31.084227] ? get_unmapped_area+0x1f5/0x3f0 [ 31.084824] do_mmap+0x854/0xf00 [ 31.085285] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.085807] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.086391] ksys_mmap_pgoff+0x3af/0x500 [ 31.086927] do_syscall_64+0x3f/0x90 [ 31.087439] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.088101] RIP: 0033:0x7fa95ab40d82 [ 31.088595] 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 [ 31.090788] RSP: 002b:00007ffd794df448 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.091746] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa95ab40d82 [ 31.092626] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa959f7a000 [ 31.093519] RBP: 00007fa959f7a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.094401] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e1d9aa9f70 [ 31.095316] R13: 00007ffd794df460 R14: 00007ffd794df490 R15: 00007ffd794df7f0 [ 31.096209] [ 31.096525] [ 31.096743] Allocated by task 213: [ 31.097179] kasan_save_stack+0x22/0x50 [ 31.097714] kasan_set_track+0x25/0x30 [ 31.098221] __kasan_slab_alloc+0x59/0x70 [ 31.098784] kmem_cache_alloc+0x16b/0x370 [ 31.099358] vm_area_dup+0x20/0x160 [ 31.099867] __split_vma+0x170/0x950 [ 31.100386] split_vma+0xc6/0x110 [ 31.100892] mprotect_fixup+0x8d2/0xb30 [ 31.101451] do_mprotect_pkey+0x87e/0xd40 [ 31.102032] __x64_sys_mprotect+0x78/0xc0 [ 31.102621] do_syscall_64+0x3f/0x90 [ 31.103172] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.103913] [ 31.104152] Freed by task 210: [ 31.104609] kasan_save_stack+0x22/0x50 [ 31.105158] kasan_set_track+0x25/0x30 [ 31.105709] kasan_save_free_info+0x2b/0x50 [ 31.106308] __kasan_slab_free+0x10a/0x190 [ 31.106883] kmem_cache_free+0x10d/0x4d0 [ 31.107439] rcu_core+0x8c8/0x2860 [ 31.107897] __do_softirq+0x1b7/0x7d4 [ 31.108396] [ 31.108692] Last potentially related work creation: [ 31.109398] kasan_save_stack+0x22/0x50 [ 31.109919] __kasan_record_aux_stack+0x8e/0xa0 [ 31.110519] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.111204] remove_vma+0x139/0x170 [ 31.111682] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.112258] do_vmi_munmap+0x1f1/0x2b0 [ 31.112772] __vm_munmap+0x138/0x3a0 [ 31.113240] __x64_sys_munmap+0x59/0x80 [ 31.113755] do_syscall_64+0x3f/0x90 [ 31.114248] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.114921] [ 31.115145] Second to last potentially related work creation: [ 31.115855] kasan_save_stack+0x22/0x50 [ 31.116366] __kasan_record_aux_stack+0x8e/0xa0 [ 31.116971] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.117647] remove_vma+0x139/0x170 [ 31.118110] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.118702] do_vmi_munmap+0x1f1/0x2b0 [ 31.119223] mmap_region+0x1f9/0x2660 [ 31.119742] do_mmap+0x854/0xf00 [ 31.120181] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.120708] ksys_mmap_pgoff+0x3af/0x500 [ 31.121226] do_syscall_64+0x3f/0x90 [ 31.121721] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.122376] [ 31.122606] The buggy address belongs to the object at ffff88800c724000 [ 31.122606] which belongs to the cache vm_area_struct of size 168 [ 31.124128] The buggy address is located 88 bytes inside of [ 31.124128] freed 168-byte region [ffff88800c724000, ffff88800c7240a8) [ 31.125599] [ 31.125820] The buggy address belongs to the physical page: [ 31.126485] page:0000000035bf0daf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc724 [ 31.127628] memcg:ffff88800e821e01 [ 31.128060] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.128787] page_type: 0xffffffff() [ 31.129262] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.130191] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e821e01 [ 31.131143] page dumped because: kasan: bad access detected [ 31.131823] [ 31.132052] Memory state around the buggy address: [ 31.132684] ffff88800c723f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 31.133575] ffff88800c723f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.134467] >ffff88800c724000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.135343] ^ [ 31.136087] ffff88800c724080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 31.136974] ffff88800c724100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.137862] ================================================================== [ 31.138994] Disabling lock debugging due to kernel taint [ 33.397034] BUG: Bad rss-counter state mm:00000000452eb77c type:MM_FILEPAGES val:33 [ 33.397971] BUG: Bad rss-counter state mm:00000000452eb77c type:MM_ANONPAGES val:22 [ 33.884222] BUG: Bad rss-counter state mm:0000000051aa870d type:MM_FILEPAGES val:33 [ 33.885191] BUG: Bad rss-counter state mm:0000000051aa870d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13971' (ECDSA) to the list of known hosts. 2023/06/21 06:48:44 fuzzer started 2023/06/21 06:48:44 dialing manager at localhost:36067 2023/06/21 06:48:44 checking machine... 2023/06/21 06:48:44 checking revisions... [ 34.654203] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:48:44 testing simple program... [ 34.706756] cgroup: Unknown subsys name 'net' [ 34.761567] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:48:44 Registers: info registers vcpu 0 RAX=0000000000000004 RBX=ffff88800c4b0000 RCX=0000000000000100 RDX=000000000001c062 RSI=ffffffff8219168b RDI=0000000000000007 RBP=ffff88800c4b0180 RSP=ffff88806ce09748 R8 =0000000000000007 R9 =0000000000010000 R10=000000000001c062 R11=0000000000000000 R12=000000000001c062 R13=ffff88800c4b44c8 R14=0000000000000000 R15=ffff88800c4b0008 RIP=ffffffff8219168f 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 00007efcd432b900 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=00007efe5ca355d0 CR3=00000000174d0000 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=25252525252525252525252525252525 XMM01=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000000000a0 RBX=00000000000000a0 RCX=0000000000000000 RDX=00000000000101f6 RSI=ffffffff82191d98 RDI=0000000000000007 RBP=ffff88800c4b0000 RSP=ffff88800a1677d8 R8 =0000000000000007 R9 =0000000000010000 R10=00000000000101f6 R11=0000000000000128 R12=00000000000101f6 R13=ffffed1001896001 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff82191d9e RFL=00000093 [--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 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=00007ffefbf26d38 CR3=00000000174de000 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=2034343a38343a3630203132206e754a XMM01=6964206465766965636552203a5d3932 XMM02=6f63736964203a31313a383935323520 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033343a38343a3630203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000