syzkaller login: [ 31.542882] BUG: Bad rss-counter state mm:000000009a4b9b20 type:MM_FILEPAGES val:33 [ 31.544149] BUG: Bad rss-counter state mm:000000009a4b9b20 type:MM_ANONPAGES val:22 [ 31.690048] ================================================================== [ 31.690968] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.691915] Read of size 8 at addr ffff88800f03f798 by task sshd/220 [ 31.692702] [ 31.692920] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.693949] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.694937] Call Trace: [ 31.695291] [ 31.695602] dump_stack_lvl+0x91/0xf0 [ 31.696110] print_report+0xcc/0x620 [ 31.696609] ? __virt_addr_valid+0x102/0x340 [ 31.697165] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.697784] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.698405] kasan_report+0xbe/0xf0 [ 31.698882] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.699506] vma_interval_tree_remove+0xc75/0xec0 [ 31.700118] vma_prepare+0xc54/0x11a0 [ 31.700601] __split_vma+0x5af/0x950 [ 31.701081] ? __pfx___split_vma+0x10/0x10 [ 31.701614] ? find_held_lock+0x2c/0x110 [ 31.702150] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.702720] ? lock_is_held_type+0x9f/0x120 [ 31.703264] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.703884] ? mtree_range_walk+0x632/0x900 [ 31.704456] ? mas_walk+0x5c7/0x7c0 [ 31.704939] do_vmi_munmap+0x1f1/0x2b0 [ 31.705433] mmap_region+0x1f9/0x2660 [ 31.705938] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.706454] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.707205] ? __pfx_lock_acquire+0x10/0x10 [ 31.707766] ? __pfx_mmap_region+0x10/0x10 [ 31.708327] ? security_mmap_addr+0x7d/0xa0 [ 31.708893] ? get_unmapped_area+0x1f5/0x3f0 [ 31.709487] do_mmap+0x854/0xf00 [ 31.709955] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.710474] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.711060] ksys_mmap_pgoff+0x3af/0x500 [ 31.711595] do_syscall_64+0x3f/0x90 [ 31.712097] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.712784] RIP: 0033:0x7f5fdf5e3d82 [ 31.713263] 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 [ 31.715490] RSP: 002b:00007fff9e7aa478 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.716462] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5fdf5e3d82 [ 31.717353] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5fdea1d000 [ 31.718246] RBP: 00007f5fdea1d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.719136] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d5e97b2d90 [ 31.720031] R13: 00007fff9e7aa490 R14: 00007fff9e7aa4c0 R15: 00007fff9e7aa820 [ 31.720952] [ 31.721255] [ 31.721478] Allocated by task 213: [ 31.721928] kasan_save_stack+0x22/0x50 [ 31.722454] kasan_set_track+0x25/0x30 [ 31.722983] __kasan_slab_alloc+0x59/0x70 [ 31.723528] kmem_cache_alloc+0x16b/0x370 [ 31.724069] vm_area_dup+0x20/0x160 [ 31.724550] __split_vma+0x170/0x950 [ 31.725036] split_vma+0xc6/0x110 [ 31.725498] mprotect_fixup+0x8d2/0xb30 [ 31.726030] do_mprotect_pkey+0x87e/0xd40 [ 31.726572] __x64_sys_mprotect+0x78/0xc0 [ 31.727124] do_syscall_64+0x3f/0x90 [ 31.727612] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.728306] [ 31.728530] Freed by task 213: [ 31.728933] kasan_save_stack+0x22/0x50 [ 31.729465] kasan_set_track+0x25/0x30 [ 31.729989] kasan_save_free_info+0x2b/0x50 [ 31.730544] __kasan_slab_free+0x10a/0x190 [ 31.731104] kmem_cache_free+0x10d/0x4d0 [ 31.731644] rcu_core+0x8c8/0x2860 [ 31.732107] __do_softirq+0x1b7/0x7d4 [ 31.732614] [ 31.732837] Last potentially related work creation: [ 31.733451] kasan_save_stack+0x22/0x50 [ 31.733977] __kasan_record_aux_stack+0x8e/0xa0 [ 31.734663] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.735346] remove_vma+0x139/0x170 [ 31.735823] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.736426] do_vmi_munmap+0x1f1/0x2b0 [ 31.736942] __vm_munmap+0x138/0x3a0 [ 31.737432] __x64_sys_munmap+0x59/0x80 [ 31.737957] do_syscall_64+0x3f/0x90 [ 31.738459] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.739142] [ 31.739366] The buggy address belongs to the object at ffff88800f03f740 [ 31.739366] which belongs to the cache vm_area_struct of size 168 [ 31.740944] The buggy address is located 88 bytes inside of [ 31.740944] freed 168-byte region [ffff88800f03f740, ffff88800f03f7e8) [ 31.742450] [ 31.742677] The buggy address belongs to the physical page: [ 31.743375] page:000000008f353ecd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf03f [ 31.744527] memcg:ffff88800fc7b001 [ 31.744977] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.745657] page_type: 0xffffffff() [ 31.746132] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.747110] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fc7b001 [ 31.748072] page dumped because: kasan: bad access detected [ 31.748786] [ 31.749011] Memory state around the buggy address: [ 31.749620] ffff88800f03f680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.750526] ffff88800f03f700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.751421] >ffff88800f03f780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.752320] ^ [ 31.752843] ffff88800f03f800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.753745] ffff88800f03f880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.754646] ================================================================== [ 31.755610] Disabling lock debugging due to kernel taint [ 33.961460] BUG: Bad rss-counter state mm:00000000ad8d8580 type:MM_FILEPAGES val:33 [ 33.962441] BUG: Bad rss-counter state mm:00000000ad8d8580 type:MM_ANONPAGES val:22 [ 34.468534] BUG: Bad rss-counter state mm:0000000011066dbf type:MM_FILEPAGES val:33 [ 34.469536] BUG: Bad rss-counter state mm:0000000011066dbf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52928' (ECDSA) to the list of known hosts. 2023/06/19 17:37:50 fuzzer started 2023/06/19 17:37:50 dialing manager at localhost:44161 2023/06/19 17:37:50 checking machine... 2023/06/19 17:37:50 checking revisions... [ 35.197243] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:37:50 testing simple program... [ 35.254789] cgroup: Unknown subsys name 'net' [ 35.293438] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:37:49 Registers: info registers vcpu 0 RAX=fffffffffe4b9978 RBX=ffffffff8604d2d0 RCX=ffffffff84506c7e RDX=0000000000000000 RSI=ffffffff864b0222 RDI=ffffffff8604d2b8 RBP=ffffffff8604d2b8 RSP=ffff88806ce09998 R8 =ffffffff864b0222 R9 =ffff88806ce09a90 R10=0000000000038001 R11=00000000000b4fb9 R12=ffffffff8604d2e8 R13=ffffffff8604d2b8 R14=ffffffff8604d2b8 R15=dffffc0000000000 RIP=ffffffff8112fc93 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 00007fc58e649900 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=00007fc58da98020 CR3=000000000b848000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=381af082b0d17e3100000000000ae988 XMM05=255d9d58938267d30000000000135658 XMM06=19e9129bd510f23500000000001344f0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=ffff8880172dfe20 RCX=0000000000000000 RDX=ffff8880173f0000 RSI=ffffffff8449f9ad RDI=0000000000000007 RBP=ffff88801711e41c RSP=ffff8880172dfd88 R8 =0000000000000007 R9 =0000000000001000 R10=ffff88801711e41e R11=0000000000000000 R12=ffff88801711e400 R13=ffffed1002e5bfcb R14=ffff88801711e41c R15=ffff8880172dfe59 RIP=ffffffff814c07eb 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fae1c55d900 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=00007fae1c52c008 CR3=000000001a2ac000 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