syzkaller login: [ 31.830666] BUG: Bad rss-counter state mm:00000000bcc42216 type:MM_FILEPAGES val:33 [ 31.831653] BUG: Bad rss-counter state mm:00000000bcc42216 type:MM_ANONPAGES val:22 [ 31.991290] ================================================================== [ 31.992166] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.993093] Read of size 8 at addr ffff88800ec9ded8 by task sshd/218 [ 31.993857] [ 31.994072] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.995066] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.996024] Call Trace: [ 31.996338] [ 31.996616] dump_stack_lvl+0x91/0xf0 [ 31.997123] print_report+0xcc/0x620 [ 31.997603] ? __virt_addr_valid+0x102/0x340 [ 31.998149] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.998760] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.999367] kasan_report+0xbe/0xf0 [ 31.999835] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.000441] vma_interval_tree_remove+0xc75/0xec0 [ 32.001036] vma_prepare+0xc54/0x11a0 [ 32.001505] __split_vma+0x5af/0x950 [ 32.001969] ? __pfx___split_vma+0x10/0x10 [ 32.002490] ? find_held_lock+0x2c/0x110 [ 32.003004] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.003561] ? lock_is_held_type+0x9f/0x120 [ 32.004090] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.004683] ? mtree_range_walk+0x632/0x900 [ 32.005243] ? mas_walk+0x5c7/0x7c0 [ 32.005705] do_vmi_munmap+0x1f1/0x2b0 [ 32.006179] mmap_region+0x1f9/0x2660 [ 32.006649] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.007142] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.007841] ? __pfx_lock_acquire+0x10/0x10 [ 32.008356] ? __pfx_mmap_region+0x10/0x10 [ 32.008871] ? security_mmap_addr+0x7d/0xa0 [ 32.009388] ? get_unmapped_area+0x1f5/0x3f0 [ 32.009919] do_mmap+0x854/0xf00 [ 32.010347] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.010824] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.011370] ksys_mmap_pgoff+0x3af/0x500 [ 32.011862] do_syscall_64+0x3f/0x90 [ 32.012326] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.012956] RIP: 0033:0x7f5b219ecd82 [ 32.013421] 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 [ 32.015462] RSP: 002b:00007ffdd810d028 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.016339] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5b219ecd82 [ 32.017168] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5b20e26000 [ 32.017989] RBP: 00007f5b20e26000 R08: 0000000000000009 R09: 0000000000001000 [ 32.018804] R10: 0000000000000812 R11: 0000000000000206 R12: 000056071ae59980 [ 32.019626] R13: 00007ffdd810d040 R14: 00007ffdd810d070 R15: 00007ffdd810d3d0 [ 32.020461] [ 32.020743] [ 32.020952] Allocated by task 211: [ 32.021374] kasan_save_stack+0x22/0x50 [ 32.021866] kasan_set_track+0x25/0x30 [ 32.022344] __kasan_slab_alloc+0x59/0x70 [ 32.022851] kmem_cache_alloc+0x16b/0x370 [ 32.023351] vm_area_dup+0x20/0x160 [ 32.023790] __split_vma+0x170/0x950 [ 32.024244] split_vma+0xc6/0x110 [ 32.024670] mprotect_fixup+0x8d2/0xb30 [ 32.025170] do_mprotect_pkey+0x87e/0xd40 [ 32.025681] __x64_sys_mprotect+0x78/0xc0 [ 32.026193] do_syscall_64+0x3f/0x90 [ 32.026650] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.027278] [ 32.027490] Freed by task 211: [ 32.027873] kasan_save_stack+0x22/0x50 [ 32.028385] kasan_set_track+0x25/0x30 [ 32.028887] kasan_save_free_info+0x2b/0x50 [ 32.029432] __kasan_slab_free+0x10a/0x190 [ 32.029968] kmem_cache_free+0x10d/0x4d0 [ 32.030472] rcu_core+0x8c8/0x2860 [ 32.030913] __do_softirq+0x1b7/0x7d4 [ 32.031382] [ 32.031597] Last potentially related work creation: [ 32.032180] kasan_save_stack+0x22/0x50 [ 32.032685] __kasan_record_aux_stack+0x8e/0xa0 [ 32.033272] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.033921] remove_vma+0x139/0x170 [ 32.034375] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.034932] do_vmi_munmap+0x1f1/0x2b0 [ 32.035424] __vm_munmap+0x138/0x3a0 [ 32.035892] __x64_sys_munmap+0x59/0x80 [ 32.036459] do_syscall_64+0x3f/0x90 [ 32.036931] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.037576] [ 32.037800] The buggy address belongs to the object at ffff88800ec9de80 [ 32.037800] which belongs to the cache vm_area_struct of size 168 [ 32.039277] The buggy address is located 88 bytes inside of [ 32.039277] freed 168-byte region [ffff88800ec9de80, ffff88800ec9df28) [ 32.040696] [ 32.040913] The buggy address belongs to the physical page: [ 32.041593] page:000000005d6d3951 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xec9d [ 32.042695] memcg:ffff88801658eb01 [ 32.043129] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.043791] page_type: 0xffffffff() [ 32.044240] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.045158] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801658eb01 [ 32.046063] page dumped because: kasan: bad access detected [ 32.046729] [ 32.046944] Memory state around the buggy address: [ 32.047518] ffff88800ec9dd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.048381] ffff88800ec9de00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 32.049254] >ffff88800ec9de80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.050110] ^ [ 32.050834] ffff88800ec9df00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 32.051696] ffff88800ec9df80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.052544] ================================================================== [ 32.053576] Disabling lock debugging due to kernel taint [ 33.981016] BUG: Bad rss-counter state mm:00000000754e48e9 type:MM_FILEPAGES val:33 [ 33.982021] BUG: Bad rss-counter state mm:00000000754e48e9 type:MM_ANONPAGES val:22 [ 34.494892] BUG: Bad rss-counter state mm:0000000078db3346 type:MM_FILEPAGES val:33 [ 34.496058] BUG: Bad rss-counter state mm:0000000078db3346 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60559' (ECDSA) to the list of known hosts. 2023/06/20 07:45:48 fuzzer started 2023/06/20 07:45:48 dialing manager at localhost:44161 2023/06/20 07:45:48 checking machine... 2023/06/20 07:45:48 checking revisions... [ 35.151418] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:45:48 testing simple program... [ 35.193406] cgroup: Unknown subsys name 'net' [ 35.231715] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:45:46 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=000000000000004e RCX=0000000000000000 RDX=ffff8880166c51c0 RSI=ffffffff8184ceb6 RDI=0000000000000007 RBP=ffff888009a5cc4e RSP=ffff888016487870 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=00676f6c2d766564 R12=ffff888009a5cc00 R13=0000000000000001 R14=ffffea0000269700 R15=ffffea0000269700 RIP=ffffffff814c07e4 RFL=00000293 [--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 00007fcf4d516700 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=00007ffd92b888c8 CR3=000000000e1c2000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a34353937332074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343539 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000007 RBX=ffff88800f617dc0 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff818c8718 RDI=ffff88800c21a37f RBP=ffff888008f92000 RSP=ffff88800f617d30 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffff88800f617d30 R11=00000000000b6996 R12=ffff88800c21a2f0 R13=ffff88800f617dc4 R14=ffffffff84d2fa00 R15=0000000000000004 RIP=ffffffff818c874a 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 00007fedc58d7900 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=00007fedc5e8c650 CR3=000000000fcf4000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000