syzkaller login: [ 31.195144] BUG: Bad rss-counter state mm:000000001590bb00 type:MM_FILEPAGES val:33 [ 31.196312] BUG: Bad rss-counter state mm:000000001590bb00 type:MM_ANONPAGES val:22 [ 31.263801] ================================================================== [ 31.264719] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.265618] Read of size 8 at addr ffff8880177024e0 by task sshd/220 [ 31.266514] [ 31.266723] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.267533] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.268440] Call Trace: [ 31.268747] [ 31.269018] dump_stack_lvl+0x91/0xf0 [ 31.269497] print_report+0xcc/0x620 [ 31.269964] ? __virt_addr_valid+0x102/0x340 [ 31.270492] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.271074] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.271649] kasan_report+0xbe/0xf0 [ 31.272098] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.272681] vma_interval_tree_remove+0xc75/0xec0 [ 31.273252] vma_prepare+0xc54/0x11a0 [ 31.273986] __split_vma+0x5af/0x950 [ 31.274616] ? __pfx___split_vma+0x10/0x10 [ 31.275303] ? find_held_lock+0x2c/0x110 [ 31.275958] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.276691] ? lock_is_held_type+0x9f/0x120 [ 31.277417] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.278194] ? mtree_range_walk+0x632/0x900 [ 31.278911] ? mas_walk+0x5c7/0x7c0 [ 31.279519] do_vmi_munmap+0x1f1/0x2b0 [ 31.280159] mmap_region+0x1f9/0x2660 [ 31.280772] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.281441] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.282354] ? __pfx_lock_acquire+0x10/0x10 [ 31.283044] ? __pfx_mmap_region+0x10/0x10 [ 31.283712] ? security_mmap_addr+0x7d/0xa0 [ 31.284395] ? get_unmapped_area+0x1f5/0x3f0 [ 31.285097] do_mmap+0x854/0xf00 [ 31.285667] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.286294] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.287011] ksys_mmap_pgoff+0x3af/0x500 [ 31.287660] do_syscall_64+0x3f/0x90 [ 31.288284] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.289122] RIP: 0033:0x7f1508537d82 [ 31.289722] 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 [ 31.292125] RSP: 002b:00007ffdc8ae5898 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.293077] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1508537d82 [ 31.293987] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1507971000 [ 31.294890] RBP: 00007f1507971000 R08: 0000000000000009 R09: 0000000000001000 [ 31.295786] R10: 0000000000000812 R11: 0000000000000206 R12: 00005558f1246ec0 [ 31.296697] R13: 00007ffdc8ae58b0 R14: 00007ffdc8ae58e0 R15: 00007ffdc8ae5c40 [ 31.297602] [ 31.297909] [ 31.298137] Allocated by task 213: [ 31.298591] kasan_save_stack+0x22/0x50 [ 31.299125] kasan_set_track+0x25/0x30 [ 31.299634] __kasan_slab_alloc+0x59/0x70 [ 31.300200] kmem_cache_alloc+0x16b/0x370 [ 31.300750] vm_area_dup+0x20/0x160 [ 31.301229] __split_vma+0x170/0x950 [ 31.301739] split_vma+0xc6/0x110 [ 31.302198] mprotect_fixup+0x8d2/0xb30 [ 31.302731] do_mprotect_pkey+0x87e/0xd40 [ 31.303283] __x64_sys_mprotect+0x78/0xc0 [ 31.303848] do_syscall_64+0x3f/0x90 [ 31.304362] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.305049] [ 31.305274] Freed by task 213: [ 31.305694] kasan_save_stack+0x22/0x50 [ 31.306236] kasan_set_track+0x25/0x30 [ 31.306763] kasan_save_free_info+0x2b/0x50 [ 31.307326] __kasan_slab_free+0x10a/0x190 [ 31.307944] kmem_cache_free+0x10d/0x4d0 [ 31.308478] rcu_core+0x8c8/0x2860 [ 31.308944] __do_softirq+0x1b7/0x7d4 [ 31.309464] [ 31.309697] Last potentially related work creation: [ 31.310318] kasan_save_stack+0x22/0x50 [ 31.310849] __kasan_record_aux_stack+0x8e/0xa0 [ 31.311452] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.312125] remove_vma+0x139/0x170 [ 31.312605] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.313199] do_vmi_munmap+0x1f1/0x2b0 [ 31.313718] __vm_munmap+0x138/0x3a0 [ 31.314200] __x64_sys_munmap+0x59/0x80 [ 31.314725] do_syscall_64+0x3f/0x90 [ 31.315223] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.315901] [ 31.316124] The buggy address belongs to the object at ffff888017702488 [ 31.316124] which belongs to the cache vm_area_struct of size 168 [ 31.317702] The buggy address is located 88 bytes inside of [ 31.317702] freed 168-byte region [ffff888017702488, ffff888017702530) [ 31.319240] [ 31.319485] The buggy address belongs to the physical page: [ 31.320177] page:00000000449c52ef refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17702 [ 31.321328] memcg:ffff888017766601 [ 31.321793] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.322479] page_type: 0xffffffff() [ 31.322946] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.324003] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017766601 [ 31.325119] page dumped because: kasan: bad access detected [ 31.325974] [ 31.326242] Memory state around the buggy address: [ 31.326954] ffff888017702380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.328007] ffff888017702400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.329059] >ffff888017702480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.330120] ^ [ 31.331047] ffff888017702500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.332107] ffff888017702580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.332987] ================================================================== [ 31.334003] Disabling lock debugging due to kernel taint [ 33.251750] BUG: Bad rss-counter state mm:000000008fc2cfb7 type:MM_FILEPAGES val:33 [ 33.252737] BUG: Bad rss-counter state mm:000000008fc2cfb7 type:MM_ANONPAGES val:22 [ 33.743052] BUG: Bad rss-counter state mm:0000000017ec3768 type:MM_FILEPAGES val:33 [ 33.744432] BUG: Bad rss-counter state mm:0000000017ec3768 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54726' (ECDSA) to the list of known hosts. 2023/06/21 04:31:03 fuzzer started 2023/06/21 04:31:03 dialing manager at localhost:36067 2023/06/21 04:31:03 checking machine... 2023/06/21 04:31:03 checking revisions... [ 34.452266] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:31:04 testing simple program... [ 34.500384] cgroup: Unknown subsys name 'net' [ 34.565643] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:31:03 Registers: info registers vcpu 0 RAX=0000000000000005 RBX=ffff88800c9d5800 RCX=0000000000000000 RDX=ffff8880166c7b40 RSI=0000000000000016 RDI=000000000000001f RBP=0000000000000014 RSP=ffff8880166c7ad0 R8 =0000000000000004 R9 =0000000000000014 R10=0000000000000014 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff88800c9d5804 R14=000000000000001f R15=ffff888014583a00 RIP=ffffffff81f2bfa4 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 00007f9c7d368900 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=00007f9c7d91f618 CR3=00000000164e2000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=ffff888008c04400 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=00007f151ce923a0 CR3=000000000cab4000 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=a4501406140e23bae644399e14d84d54 XMM02=000000000011c058ec2efd57dc4c00df XMM03=00000000001229b016de18315cd2c4e5 XMM04=06d0df8757d926ee00000000000ae988 XMM05=945bb1c5929b03030000000000132d20 XMM06=4fda316b135da52b0000000000132718 XMM07=e042d86d42eb936e0000000000122c30 XMM08=16de18315cd2c4e5000000000011c0b8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000