syzkaller login: [ 30.752050] BUG: Bad rss-counter state mm:000000002de497af type:MM_FILEPAGES val:33 [ 30.753259] BUG: Bad rss-counter state mm:000000002de497af type:MM_ANONPAGES val:22 [ 30.789486] ================================================================== [ 30.790526] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.791713] Read of size 8 at addr ffff88801980da50 by task sshd/220 [ 30.792630] [ 30.792862] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.793905] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.795213] Call Trace: [ 30.795655] [ 30.795998] dump_stack_lvl+0x91/0xf0 [ 30.796593] print_report+0xcc/0x620 [ 30.797234] ? __virt_addr_valid+0x102/0x340 [ 30.797966] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.798789] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.799618] kasan_report+0xbe/0xf0 [ 30.800233] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.801193] vma_interval_tree_remove+0xc75/0xec0 [ 30.801963] vma_prepare+0xc54/0x11a0 [ 30.802589] __split_vma+0x5af/0x950 [ 30.803230] ? __pfx___split_vma+0x10/0x10 [ 30.803944] ? find_held_lock+0x2c/0x110 [ 30.804613] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.805347] ? lock_is_held_type+0x9f/0x120 [ 30.806064] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.806843] ? mtree_range_walk+0x632/0x900 [ 30.807563] ? mas_walk+0x5c7/0x7c0 [ 30.808206] do_vmi_munmap+0x1f1/0x2b0 [ 30.808838] mmap_region+0x1f9/0x2660 [ 30.809460] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.810132] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.811072] ? __pfx_lock_acquire+0x10/0x10 [ 30.811795] ? __pfx_mmap_region+0x10/0x10 [ 30.812508] ? security_mmap_addr+0x7d/0xa0 [ 30.813217] ? get_unmapped_area+0x1f5/0x3f0 [ 30.813946] do_mmap+0x854/0xf00 [ 30.814508] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.815160] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.815855] ksys_mmap_pgoff+0x3af/0x500 [ 30.816428] do_syscall_64+0x3f/0x90 [ 30.816959] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.817685] RIP: 0033:0x7fcc5f2c2d82 [ 30.818189] 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 [ 30.820563] RSP: 002b:00007ffcb99dd448 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.821565] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcc5f2c2d82 [ 30.822502] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcc5e6fc000 [ 30.823447] RBP: 00007fcc5e6fc000 R08: 0000000000000009 R09: 0000000000001000 [ 30.824402] R10: 0000000000000812 R11: 0000000000000206 R12: 000056281a930ec0 [ 30.825328] R13: 00007ffcb99dd460 R14: 00007ffcb99dd490 R15: 00007ffcb99dd7f0 [ 30.826265] [ 30.826587] [ 30.826825] Allocated by task 213: [ 30.827304] kasan_save_stack+0x22/0x50 [ 30.827877] kasan_set_track+0x25/0x30 [ 30.828412] __kasan_slab_alloc+0x59/0x70 [ 30.828985] kmem_cache_alloc+0x16b/0x370 [ 30.829551] vm_area_dup+0x20/0x160 [ 30.830046] __split_vma+0x170/0x950 [ 30.830551] split_vma+0xc6/0x110 [ 30.831021] mprotect_fixup+0x8d2/0xb30 [ 30.831565] do_mprotect_pkey+0x87e/0xd40 [ 30.832148] __x64_sys_mprotect+0x78/0xc0 [ 30.832714] do_syscall_64+0x3f/0x90 [ 30.833221] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.833916] [ 30.834150] Freed by task 213: [ 30.834569] kasan_save_stack+0x22/0x50 [ 30.835108] kasan_set_track+0x25/0x30 [ 30.835643] kasan_save_free_info+0x2b/0x50 [ 30.836219] __kasan_slab_free+0x10a/0x190 [ 30.836825] kmem_cache_free+0x10d/0x4d0 [ 30.837402] rcu_core+0x8c8/0x2860 [ 30.837911] __do_softirq+0x1b7/0x7d4 [ 30.838455] [ 30.838699] Last potentially related work creation: [ 30.839389] kasan_save_stack+0x22/0x50 [ 30.839982] __kasan_record_aux_stack+0x8e/0xa0 [ 30.840643] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.841376] remove_vma+0x139/0x170 [ 30.841869] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.842492] do_vmi_munmap+0x1f1/0x2b0 [ 30.843025] __vm_munmap+0x138/0x3a0 [ 30.843538] __x64_sys_munmap+0x59/0x80 [ 30.844106] do_syscall_64+0x3f/0x90 [ 30.844631] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.845411] [ 30.845646] The buggy address belongs to the object at ffff88801980d9f8 [ 30.845646] which belongs to the cache vm_area_struct of size 168 [ 30.847210] The buggy address is located 88 bytes inside of [ 30.847210] freed 168-byte region [ffff88801980d9f8, ffff88801980daa0) [ 30.848739] [ 30.848978] The buggy address belongs to the physical page: [ 30.849707] page:00000000ec532a08 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1980d [ 30.850920] memcg:ffff8880169ade01 [ 30.851393] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.852118] page_type: 0xffffffff() [ 30.852616] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.853634] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880169ade01 [ 30.854639] page dumped because: kasan: bad access detected [ 30.855383] [ 30.855636] Memory state around the buggy address: [ 30.856280] ffff88801980d900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.857233] ffff88801980d980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.858180] >ffff88801980da00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.859118] ^ [ 30.859910] ffff88801980da80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.860856] ffff88801980db00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.861811] ================================================================== [ 30.863078] Disabling lock debugging due to kernel taint [ 33.016169] BUG: Bad rss-counter state mm:00000000c9bc7bb3 type:MM_FILEPAGES val:33 [ 33.017160] BUG: Bad rss-counter state mm:00000000c9bc7bb3 type:MM_ANONPAGES val:22 [ 33.481657] BUG: Bad rss-counter state mm:00000000684d3e08 type:MM_FILEPAGES val:33 [ 33.482917] BUG: Bad rss-counter state mm:00000000684d3e08 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36817' (ECDSA) to the list of known hosts. 2023/06/20 19:06:28 fuzzer started 2023/06/20 19:06:28 dialing manager at localhost:36067 2023/06/20 19:06:28 checking machine... 2023/06/20 19:06:28 checking revisions... [ 34.074730] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:06:28 testing simple program... [ 34.121256] cgroup: Unknown subsys name 'net' [ 34.197429] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:06:28 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=ffffffff863b3c01 RDX=1ffff11002b17eec RSI=ffffffff8450cc7f RDI=ffff8880158bf7d0 RBP=ffff8880158bf7a0 RSP=ffff8880158bf6f8 R8 =ffffffff863b3c2a R9 =ffff8880158bf748 R10=0000000000038001 R11=000000000008aa85 R12=ffff8880158bf7d0 R13=0000000000000000 R14=ffff88800f600000 R15=0000000000082cc0 RIP=ffffffff813ad47f 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 00007f150e7ac900 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=00007ffd85996000 CR3=000000001686a000 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=6720646572637465733a4d41503d706f 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007fcc52e71000 CR3=000000000ea1a000 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=2038323a36303a3931203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038323a36303a3931203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000