syzkaller login: [ 31.619125] BUG: Bad rss-counter state mm:000000006f6228f6 type:MM_FILEPAGES val:33 [ 31.620407] BUG: Bad rss-counter state mm:000000006f6228f6 type:MM_ANONPAGES val:22 [ 31.749620] ================================================================== [ 31.750305] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.750986] Read of size 8 at addr ffff888015bdb140 by task sshd/221 [ 31.751521] [ 31.751672] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.752267] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.752956] Call Trace: [ 31.753182] [ 31.753406] dump_stack_lvl+0x91/0xf0 [ 31.753979] print_report+0xcc/0x620 [ 31.754319] ? __virt_addr_valid+0x102/0x340 [ 31.754712] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.755154] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.755586] kasan_report+0xbe/0xf0 [ 31.755910] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.756375] vma_interval_tree_remove+0xc75/0xec0 [ 31.756798] vma_prepare+0xc54/0x11a0 [ 31.757139] __split_vma+0x5af/0x950 [ 31.757493] ? __pfx___split_vma+0x10/0x10 [ 31.757871] ? find_held_lock+0x2c/0x110 [ 31.758237] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.758624] ? lock_is_held_type+0x9f/0x120 [ 31.758991] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.759434] ? mtree_range_walk+0x632/0x900 [ 31.759812] ? mas_walk+0x5c7/0x7c0 [ 31.760144] do_vmi_munmap+0x1f1/0x2b0 [ 31.760504] mmap_region+0x1f9/0x2660 [ 31.760840] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.761202] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.761727] ? __pfx_lock_acquire+0x10/0x10 [ 31.762085] ? __pfx_mmap_region+0x10/0x10 [ 31.762444] ? security_mmap_addr+0x7d/0xa0 [ 31.762799] ? get_unmapped_area+0x1f5/0x3f0 [ 31.763161] do_mmap+0x854/0xf00 [ 31.763466] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.763832] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.764245] ksys_mmap_pgoff+0x3af/0x500 [ 31.764616] do_syscall_64+0x3f/0x90 [ 31.764957] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.765455] RIP: 0033:0x7fefe00ebd82 [ 31.765774] 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 [ 31.767243] RSP: 002b:00007ffc651973b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.767886] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fefe00ebd82 [ 31.768467] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fefdf525000 [ 31.769045] RBP: 00007fefdf525000 R08: 0000000000000009 R09: 0000000000001000 [ 31.769709] R10: 0000000000000812 R11: 0000000000000206 R12: 00005605c480bec0 [ 31.770295] R13: 00007ffc651973d0 R14: 00007ffc65197400 R15: 00007ffc65197760 [ 31.770881] [ 31.771083] [ 31.771231] Allocated by task 214: [ 31.771525] kasan_save_stack+0x22/0x50 [ 31.771881] kasan_set_track+0x25/0x30 [ 31.772225] __kasan_slab_alloc+0x59/0x70 [ 31.772597] kmem_cache_alloc+0x16b/0x370 [ 31.772960] vm_area_dup+0x20/0x160 [ 31.773308] __split_vma+0x170/0x950 [ 31.773657] split_vma+0xc6/0x110 [ 31.773966] mprotect_fixup+0x8d2/0xb30 [ 31.774302] do_mprotect_pkey+0x87e/0xd40 [ 31.774678] __x64_sys_mprotect+0x78/0xc0 [ 31.775036] do_syscall_64+0x3f/0x90 [ 31.775359] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.775803] [ 31.775966] Freed by task 214: [ 31.776257] kasan_save_stack+0x22/0x50 [ 31.776607] kasan_set_track+0x25/0x30 [ 31.776942] kasan_save_free_info+0x2b/0x50 [ 31.777349] __kasan_slab_free+0x10a/0x190 [ 31.777729] kmem_cache_free+0x10d/0x4d0 [ 31.778088] rcu_core+0x8c8/0x2860 [ 31.778401] __do_softirq+0x1b7/0x7d4 [ 31.778714] [ 31.778864] Last potentially related work creation: [ 31.779272] kasan_save_stack+0x22/0x50 [ 31.779613] __kasan_record_aux_stack+0x8e/0xa0 [ 31.780000] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.780446] remove_vma+0x139/0x170 [ 31.780765] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.781133] do_vmi_munmap+0x1f1/0x2b0 [ 31.781504] __vm_munmap+0x138/0x3a0 [ 31.781822] __x64_sys_munmap+0x59/0x80 [ 31.782164] do_syscall_64+0x3f/0x90 [ 31.782502] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.782936] [ 31.783095] The buggy address belongs to the object at ffff888015bdb0e8 [ 31.783095] which belongs to the cache vm_area_struct of size 168 [ 31.784093] The buggy address is located 88 bytes inside of [ 31.784093] freed 168-byte region [ffff888015bdb0e8, ffff888015bdb190) [ 31.785090] [ 31.785242] The buggy address belongs to the physical page: [ 31.785761] page:00000000276b6e6f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15bdb [ 31.786501] memcg:ffff88800f54e301 [ 31.786781] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.787232] page_type: 0xffffffff() [ 31.787558] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.788206] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f54e301 [ 31.788822] page dumped because: kasan: bad access detected [ 31.789299] [ 31.789454] Memory state around the buggy address: [ 31.789867] ffff888015bdb000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.790463] ffff888015bdb080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.791052] >ffff888015bdb100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.791646] ^ [ 31.792100] ffff888015bdb180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.792689] ffff888015bdb200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.793297] ================================================================== [ 31.794021] Disabling lock debugging due to kernel taint [ 33.769750] BUG: Bad rss-counter state mm:0000000019e3dc42 type:MM_FILEPAGES val:33 [ 33.770493] BUG: Bad rss-counter state mm:0000000019e3dc42 type:MM_ANONPAGES val:22 [ 34.170619] BUG: Bad rss-counter state mm:0000000055235104 type:MM_FILEPAGES val:33 [ 34.171452] BUG: Bad rss-counter state mm:0000000055235104 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63373' (ECDSA) to the list of known hosts. 2023/06/21 08:33:41 fuzzer started 2023/06/21 08:33:41 dialing manager at localhost:36067 2023/06/21 08:33:41 checking machine... 2023/06/21 08:33:41 checking revisions... [ 34.731371] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:33:41 testing simple program... [ 34.772583] cgroup: Unknown subsys name 'net' [ 34.818465] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:33:41 Registers: info registers vcpu 0 RAX=fffffbfff0fe83ec RBX=fffffbfff0fe83ed RCX=ffffffff81ec586e RDX=fffffbfff0fe83ed RSI=0000000000000008 RDI=ffffffff87f41f60 RBP=fffffbfff0fe83ec RSP=ffff888019c0fe88 R8 =0000000000000000 R9 =fffffbfff0fe83ec R10=ffffffff87f41f67 R11=00000000000b6a61 R12=000000006492b5e5 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8180f189 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 00007f8c8e820900 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=00007f8c8e7d401c CR3=0000000017d4c000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f 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=ffffffff846000aa RBX=0000000000000010 RCX=0000000000000001 RDX=0000000000092cc0 RSI=0000000000000011 RDI=ffff8880102873d0 RBP=dffffc0000000000 RSP=ffff8880102872c0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000011 R13=0000000000092cc0 R14=ffff888010287350 R15=0000000000092cc0 RIP=ffffffff813ad651 RFL=00000202 [-------] 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 00007f6d9c348900 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=00007f6d9b73ccb0 CR3=000000000c730000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=75180d11d399b9c600000000000ae988 XMM05=c14e387f57361f4f00000000001330a8 XMM06=5a9d233068761c4a0000000000131f60 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000