syzkaller login: [ 56.095746] BUG: Bad rss-counter state mm:00000000dafa6fce type:MM_FILEPAGES val:33 [ 56.096462] BUG: Bad rss-counter state mm:00000000dafa6fce type:MM_ANONPAGES val:22 [ 56.270273] ================================================================== [ 56.271173] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 56.272115] Read of size 8 at addr ffff8880164a3ed8 by task sshd/220 [ 56.272898] [ 56.273234] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 56.274263] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 56.275324] Call Trace: [ 56.275734] [ 56.276070] dump_stack_lvl+0x91/0xf0 [ 56.276690] print_report+0xcc/0x620 [ 56.277294] ? __virt_addr_valid+0x102/0x340 [ 56.277980] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.278741] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.279492] kasan_report+0xbe/0xf0 [ 56.280073] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.280874] vma_interval_tree_remove+0xc75/0xec0 [ 56.281673] vma_prepare+0xc54/0x11a0 [ 56.282274] __split_vma+0x5af/0x950 [ 56.282874] ? __pfx___split_vma+0x10/0x10 [ 56.283540] ? find_held_lock+0x2c/0x110 [ 56.284200] do_vmi_align_munmap+0x2ba/0x11f0 [ 56.284931] ? lock_is_held_type+0x9f/0x120 [ 56.285650] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 56.286227] ? mtree_range_walk+0x632/0x900 [ 56.286587] ? mas_walk+0x5c7/0x7c0 [ 56.286892] do_vmi_munmap+0x1f1/0x2b0 [ 56.287216] mmap_region+0x1f9/0x2660 [ 56.287540] ? vm_mmap_pgoff+0x15c/0x3a0 [ 56.287876] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 56.288345] ? __pfx_lock_acquire+0x10/0x10 [ 56.288703] ? __pfx_mmap_region+0x10/0x10 [ 56.289053] ? security_mmap_addr+0x7d/0xa0 [ 56.289411] ? get_unmapped_area+0x1f5/0x3f0 [ 56.289835] do_mmap+0x854/0xf00 [ 56.290184] vm_mmap_pgoff+0x1a6/0x3a0 [ 56.290580] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 56.291033] ksys_mmap_pgoff+0x3af/0x500 [ 56.291437] do_syscall_64+0x3f/0x90 [ 56.291826] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.292362] RIP: 0033:0x7febf7019d82 [ 56.292736] 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 [ 56.294187] RSP: 002b:00007ffd1c9211d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 56.294780] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007febf7019d82 [ 56.295340] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007febf6453000 [ 56.295895] RBP: 00007febf6453000 R08: 0000000000000009 R09: 0000000000001000 [ 56.296447] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dc6a1abec0 [ 56.297007] R13: 00007ffd1c9211f0 R14: 00007ffd1c921220 R15: 00007ffd1c921580 [ 56.297591] [ 56.297784] [ 56.297924] Allocated by task 213: [ 56.298201] kasan_save_stack+0x22/0x50 [ 56.298533] kasan_set_track+0x25/0x30 [ 56.298854] __kasan_slab_alloc+0x59/0x70 [ 56.299192] kmem_cache_alloc+0x16b/0x370 [ 56.299533] vm_area_dup+0x20/0x160 [ 56.299824] __split_vma+0x170/0x950 [ 56.300124] split_vma+0xc6/0x110 [ 56.300410] mprotect_fixup+0x8d2/0xb30 [ 56.300744] do_mprotect_pkey+0x87e/0xd40 [ 56.301090] __x64_sys_mprotect+0x78/0xc0 [ 56.301427] do_syscall_64+0x3f/0x90 [ 56.301737] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.302153] [ 56.302290] Freed by task 213: [ 56.302550] kasan_save_stack+0x22/0x50 [ 56.302870] kasan_set_track+0x25/0x30 [ 56.303187] kasan_save_free_info+0x2b/0x50 [ 56.303538] __kasan_slab_free+0x10a/0x190 [ 56.303887] kmem_cache_free+0x10d/0x4d0 [ 56.304219] rcu_core+0x8c8/0x2860 [ 56.304512] __do_softirq+0x1b7/0x7d4 [ 56.304833] [ 56.304971] Last potentially related work creation: [ 56.305357] kasan_save_stack+0x22/0x50 [ 56.305692] __kasan_record_aux_stack+0x8e/0xa0 [ 56.306067] __call_rcu_common.constprop.0+0x6a/0xb90 [ 56.306482] remove_vma+0x139/0x170 [ 56.306787] do_vmi_align_munmap+0xd4a/0x11f0 [ 56.307152] do_vmi_munmap+0x1f1/0x2b0 [ 56.307471] __vm_munmap+0x138/0x3a0 [ 56.307776] __x64_sys_munmap+0x59/0x80 [ 56.308095] do_syscall_64+0x3f/0x90 [ 56.308399] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.308830] [ 56.308971] The buggy address belongs to the object at ffff8880164a3e80 [ 56.308971] which belongs to the cache vm_area_struct of size 168 [ 56.309954] The buggy address is located 88 bytes inside of [ 56.309954] freed 168-byte region [ffff8880164a3e80, ffff8880164a3f28) [ 56.310876] [ 56.311015] The buggy address belongs to the physical page: [ 56.311449] page:000000001f5c7ea9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x164a3 [ 56.312171] memcg:ffff888019c89f01 [ 56.312448] flags: 0x100000000000200(slab|node=0|zone=1) [ 56.312877] page_type: 0xffffffff() [ 56.313188] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 56.313797] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019c89f01 [ 56.314387] page dumped because: kasan: bad access detected [ 56.314817] [ 56.314956] Memory state around the buggy address: [ 56.315326] ffff8880164a3d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 56.315884] ffff8880164a3e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 56.316435] >ffff8880164a3e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 56.316991] ^ [ 56.317471] ffff8880164a3f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 56.318031] ffff8880164a3f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 56.318588] ================================================================== [ 56.319275] Disabling lock debugging due to kernel taint [ 58.333329] BUG: Bad rss-counter state mm:000000003e90446b type:MM_FILEPAGES val:33 [ 58.334492] BUG: Bad rss-counter state mm:000000003e90446b type:MM_ANONPAGES val:22 [ 58.746494] BUG: Bad rss-counter state mm:00000000ced27d0a type:MM_FILEPAGES val:33 [ 58.747571] BUG: Bad rss-counter state mm:00000000ced27d0a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59738' (ECDSA) to the list of known hosts. 2023/06/20 06:05:48 fuzzer started 2023/06/20 06:05:48 dialing manager at localhost:44161 2023/06/20 06:05:48 checking machine... 2023/06/20 06:05:48 checking revisions... [ 59.445147] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:05:48 testing simple program... [ 59.480088] cgroup: Unknown subsys name 'net' [ 59.512353] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:05:22 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888009496e20 RCX=0000000000000001 RDX=1ffff11001292dc5 RSI=ffffffff81741198 RDI=ffff888009496e28 RBP=000000000000000a RSP=ffff888009496d38 R8 =0000000000000001 R9 =ffff888009496d98 R10=0000000000038001 R11=000000000001e456 R12=ffff888009496e20 R13=0000000000000000 R14=ffff88801a053680 R15=ffff888009497278 RIP=ffffffff813ad46e RFL=00000216 [----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 00007fbdbb942900 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=00007fbdbb921020 CR3=000000000f614000 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=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 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff8180995c RDX=0000000000008099 RSI=0000000000008099 RDI=ffffffff86507e24 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =0000000000000000 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020dae R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff8113077a RFL=00000213 [----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=00007f80749d8670 CR3=000000000d708000 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=79f3210319344db70e43fc862cedbae2 XMM02=2c67c8bc2e329bc30000000000128f28 XMM03=fb795ef6d6577056000000000012d6c8 XMM04=82c3302b258663d500000000000ae988 XMM05=e4cb8bb95a7664b6000000000013d108 XMM06=b1b45a61c106eacd000000000013bf70 XMM07=e042d86d42eb936e000000000012d948 XMM08=04ba5f6cdd3984430000000000128f88 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000