syzkaller login: [ 46.948024] BUG: Bad rss-counter state mm:0000000069fe94bd type:MM_FILEPAGES val:33 [ 46.949107] BUG: Bad rss-counter state mm:0000000069fe94bd type:MM_ANONPAGES val:22 [ 47.073956] ================================================================== [ 47.074734] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 47.075545] Read of size 8 at addr ffff88800e86c968 by task sshd/223 [ 47.076232] [ 47.076422] CPU: 1 PID: 223 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 47.077203] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 47.078086] Call Trace: [ 47.078431] [ 47.078749] dump_stack_lvl+0x91/0xf0 [ 47.079184] print_report+0xcc/0x620 [ 47.079618] ? __virt_addr_valid+0x102/0x340 [ 47.080118] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.080665] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.081210] kasan_report+0xbe/0xf0 [ 47.081633] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.082177] vma_interval_tree_remove+0xc75/0xec0 [ 47.082712] vma_prepare+0xc54/0x11a0 [ 47.083150] __split_vma+0x5af/0x950 [ 47.083577] ? __pfx___split_vma+0x10/0x10 [ 47.084052] ? find_held_lock+0x2c/0x110 [ 47.084512] do_vmi_align_munmap+0x2ba/0x11f0 [ 47.085014] ? lock_is_held_type+0x9f/0x120 [ 47.085498] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 47.086040] ? mtree_range_walk+0x632/0x900 [ 47.086536] ? mas_walk+0x5c7/0x7c0 [ 47.086959] do_vmi_munmap+0x1f1/0x2b0 [ 47.087402] mmap_region+0x1f9/0x2660 [ 47.087831] ? vm_mmap_pgoff+0x15c/0x3a0 [ 47.088314] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 47.088924] ? __pfx_lock_acquire+0x10/0x10 [ 47.089390] ? __pfx_mmap_region+0x10/0x10 [ 47.089842] ? security_mmap_addr+0x7d/0xa0 [ 47.090295] ? get_unmapped_area+0x1f5/0x3f0 [ 47.090769] do_mmap+0x854/0xf00 [ 47.091140] vm_mmap_pgoff+0x1a6/0x3a0 [ 47.091561] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 47.092054] ksys_mmap_pgoff+0x3af/0x500 [ 47.092485] do_syscall_64+0x3f/0x90 [ 47.092896] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.093447] RIP: 0033:0x7f76f1f26d82 [ 47.093844] 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 [ 47.095692] RSP: 002b:00007ffdada66808 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 47.096466] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f76f1f26d82 [ 47.097207] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f76f1360000 [ 47.097950] RBP: 00007f76f1360000 R08: 0000000000000009 R09: 0000000000001000 [ 47.098690] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ce745b0ec0 [ 47.099418] R13: 00007ffdada66820 R14: 00007ffdada66850 R15: 00007ffdada66bb0 [ 47.100377] [ 47.100765] [ 47.101047] Allocated by task 214: [ 47.101636] kasan_save_stack+0x22/0x50 [ 47.102318] kasan_set_track+0x25/0x30 [ 47.102971] __kasan_slab_alloc+0x59/0x70 [ 47.103685] kmem_cache_alloc+0x16b/0x370 [ 47.104430] vm_area_dup+0x20/0x160 [ 47.105039] __split_vma+0x170/0x950 [ 47.105671] split_vma+0xc6/0x110 [ 47.106265] mprotect_fixup+0x8d2/0xb30 [ 47.106930] do_mprotect_pkey+0x87e/0xd40 [ 47.107639] __x64_sys_mprotect+0x78/0xc0 [ 47.108353] do_syscall_64+0x3f/0x90 [ 47.108938] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.109753] [ 47.110020] Freed by task 211: [ 47.110534] kasan_save_stack+0x22/0x50 [ 47.111146] kasan_set_track+0x25/0x30 [ 47.111784] kasan_save_free_info+0x2b/0x50 [ 47.112490] __kasan_slab_free+0x10a/0x190 [ 47.113058] kmem_cache_free+0x10d/0x4d0 [ 47.113613] rcu_core+0x8c8/0x2860 [ 47.114094] __do_softirq+0x1b7/0x7d4 [ 47.114615] [ 47.114847] Last potentially related work creation: [ 47.115486] kasan_save_stack+0x22/0x50 [ 47.116031] __kasan_record_aux_stack+0x8e/0xa0 [ 47.116665] __call_rcu_common.constprop.0+0x6a/0xb90 [ 47.117360] remove_vma+0x139/0x170 [ 47.117854] do_vmi_align_munmap+0xd4a/0x11f0 [ 47.118487] do_vmi_munmap+0x1f1/0x2b0 [ 47.119034] __vm_munmap+0x138/0x3a0 [ 47.119591] __x64_sys_munmap+0x59/0x80 [ 47.120150] do_syscall_64+0x3f/0x90 [ 47.120700] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.121446] [ 47.121684] Second to last potentially related work creation: [ 47.122451] kasan_save_stack+0x22/0x50 [ 47.123012] __kasan_record_aux_stack+0x8e/0xa0 [ 47.123670] __call_rcu_common.constprop.0+0x6a/0xb90 [ 47.124418] remove_vma+0x139/0x170 [ 47.124923] do_vmi_align_munmap+0xd4a/0x11f0 [ 47.125562] do_vmi_munmap+0x1f1/0x2b0 [ 47.126096] mmap_region+0x1f9/0x2660 [ 47.126644] do_mmap+0x854/0xf00 [ 47.127110] vm_mmap_pgoff+0x1a6/0x3a0 [ 47.127678] ksys_mmap_pgoff+0x3af/0x500 [ 47.128253] do_syscall_64+0x3f/0x90 [ 47.128793] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.129528] [ 47.129761] The buggy address belongs to the object at ffff88800e86c910 [ 47.129761] which belongs to the cache vm_area_struct of size 168 [ 47.131432] The buggy address is located 88 bytes inside of [ 47.131432] freed 168-byte region [ffff88800e86c910, ffff88800e86c9b8) [ 47.133048] [ 47.133309] The buggy address belongs to the physical page: [ 47.134048] page:0000000066526b64 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe86c [ 47.135291] memcg:ffff888014430f01 [ 47.135761] flags: 0x100000000000200(slab|node=0|zone=1) [ 47.136515] page_type: 0xffffffff() [ 47.137005] raw: 0100000000000200 ffff88800879fc80 ffffea0000325f80 dead000000000002 [ 47.138048] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014430f01 [ 47.139065] page dumped because: kasan: bad access detected [ 47.139808] [ 47.140062] Memory state around the buggy address: [ 47.140735] ffff88800e86c800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 47.141685] ffff88800e86c880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 47.142650] >ffff88800e86c900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 47.143629] ^ [ 47.144533] ffff88800e86c980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 47.145495] ffff88800e86ca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 47.146453] ================================================================== [ 47.148002] Disabling lock debugging due to kernel taint [ 49.603354] BUG: Bad rss-counter state mm:0000000052db1000 type:MM_FILEPAGES val:33 [ 49.604782] BUG: Bad rss-counter state mm:0000000052db1000 type:MM_ANONPAGES val:22 [ 50.077667] BUG: Bad rss-counter state mm:00000000a51f49a9 type:MM_FILEPAGES val:33 [ 50.079503] BUG: Bad rss-counter state mm:00000000a51f49a9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14074' (ECDSA) to the list of known hosts. 2023/06/19 13:52:11 fuzzer started 2023/06/19 13:52:12 dialing manager at localhost:44161 2023/06/19 13:52:12 checking machine... 2023/06/19 13:52:12 checking revisions... [ 50.865043] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:52:12 testing simple program... [ 50.920274] cgroup: Unknown subsys name 'net' [ 50.975174] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:51:56 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=000000000000000f RCX=1ffffffff0ba7a02 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff81839a7d RBP=ffff8880087b6500 RSP=ffff8880174cfc58 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff888014769880 R13=0000000000000000 R14=ffff8880174cfcd0 R15=0000000000000000 RIP=ffffffff81839c2b RFL=00000286 [--S--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 00007f30a453c900 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=00007ffdcb303000 CR3=000000000c4fc000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f05acee9590 CR3=0000000008dba000 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=6fd1b27c8716a48e72468edfd977c666 XMM02=ec2efd57dc4c00df0000000000120050 XMM03=ecfeddadfab190890000000000120120 XMM04=6a6792678486865400000000000ae988 XMM05=59d5b690e0af863b00000000001356b8 XMM06=5bedb426a6a2fa2f0000000000134520 XMM07=e042d86d42eb936e0000000000124ae0 XMM08=ecfeddadfab190890000000000120120 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000