syzkaller login: [ 30.547363] BUG: Bad rss-counter state mm:00000000e0cd7dce type:MM_FILEPAGES val:33 [ 30.548566] BUG: Bad rss-counter state mm:00000000e0cd7dce type:MM_ANONPAGES val:22 [ 30.604327] ================================================================== [ 30.605393] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.606488] Read of size 8 at addr ffff888016b813f8 by task sshd/221 [ 30.607479] [ 30.607739] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.608742] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.609820] Call Trace: [ 30.610148] <TASK> [ 30.610429] dump_stack_lvl+0x91/0xf0 [ 30.610917] print_report+0xcc/0x620 [ 30.611393] ? __virt_addr_valid+0x102/0x340 [ 30.611946] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.612551] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.613158] kasan_report+0xbe/0xf0 [ 30.613641] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.614264] vma_interval_tree_remove+0xc75/0xec0 [ 30.614854] vma_prepare+0xc54/0x11a0 [ 30.615327] __split_vma+0x5af/0x950 [ 30.615789] ? __pfx___split_vma+0x10/0x10 [ 30.616311] ? find_held_lock+0x2c/0x110 [ 30.616827] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.617389] ? lock_is_held_type+0x9f/0x120 [ 30.617923] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.618539] ? mtree_range_walk+0x632/0x900 [ 30.619088] ? mas_walk+0x5c7/0x7c0 [ 30.619558] do_vmi_munmap+0x1f1/0x2b0 [ 30.620050] mmap_region+0x1f9/0x2660 [ 30.620526] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.621030] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.621743] ? __pfx_lock_acquire+0x10/0x10 [ 30.622304] ? __pfx_mmap_region+0x10/0x10 [ 30.622846] ? security_mmap_addr+0x7d/0xa0 [ 30.623376] ? get_unmapped_area+0x1f5/0x3f0 [ 30.623928] do_mmap+0x854/0xf00 [ 30.624373] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.624874] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.625435] ksys_mmap_pgoff+0x3af/0x500 [ 30.625948] do_syscall_64+0x3f/0x90 [ 30.626449] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.627096] RIP: 0033:0x7f9523948d82 [ 30.627548] 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 [ 30.629695] RSP: 002b:00007ffdd9a04608 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.630602] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9523948d82 [ 30.631457] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9522d82000 [ 30.632287] RBP: 00007f9522d82000 R08: 0000000000000009 R09: 0000000000001000 [ 30.633132] R10: 0000000000000812 R11: 0000000000000206 R12: 00005611bd4bc980 [ 30.633973] R13: 00007ffdd9a04620 R14: 00007ffdd9a04650 R15: 00007ffdd9a049b0 [ 30.634835] </TASK> [ 30.635124] [ 30.635341] Allocated by task 214: [ 30.635766] kasan_save_stack+0x22/0x50 [ 30.636267] kasan_set_track+0x25/0x30 [ 30.636757] __kasan_slab_alloc+0x59/0x70 [ 30.637275] kmem_cache_alloc+0x16b/0x370 [ 30.637784] vm_area_dup+0x20/0x160 [ 30.638244] __split_vma+0x170/0x950 [ 30.638714] split_vma+0xc6/0x110 [ 30.639145] mprotect_fixup+0x8d2/0xb30 [ 30.639642] do_mprotect_pkey+0x87e/0xd40 [ 30.640167] __x64_sys_mprotect+0x78/0xc0 [ 30.640683] do_syscall_64+0x3f/0x90 [ 30.641151] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.641790] [ 30.642003] Freed by task 214: [ 30.642393] kasan_save_stack+0x22/0x50 [ 30.642905] kasan_set_track+0x25/0x30 [ 30.643389] kasan_save_free_info+0x2b/0x50 [ 30.643922] __kasan_slab_free+0x10a/0x190 [ 30.644455] kmem_cache_free+0x10d/0x4d0 [ 30.644955] rcu_core+0x8c8/0x2860 [ 30.645398] __do_softirq+0x1b7/0x7d4 [ 30.645868] [ 30.646082] Last potentially related work creation: [ 30.646678] kasan_save_stack+0x22/0x50 [ 30.647176] __kasan_record_aux_stack+0x8e/0xa0 [ 30.647741] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.648378] remove_vma+0x139/0x170 [ 30.648823] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.649373] do_vmi_munmap+0x1f1/0x2b0 [ 30.649858] __vm_munmap+0x138/0x3a0 [ 30.650335] __x64_sys_munmap+0x59/0x80 [ 30.650823] do_syscall_64+0x3f/0x90 [ 30.651297] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.651937] [ 30.652149] The buggy address belongs to the object at ffff888016b813a0 [ 30.652149] which belongs to the cache vm_area_struct of size 168 [ 30.653602] The buggy address is located 88 bytes inside of [ 30.653602] freed 168-byte region [ffff888016b813a0, ffff888016b81448) [ 30.655034] [ 30.655246] The buggy address belongs to the physical page: [ 30.655902] page:000000001a06a691 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16b81 [ 30.656991] memcg:ffff88800f7c2101 [ 30.657416] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.658058] page_type: 0xffffffff() [ 30.658513] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.659417] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f7c2101 [ 30.660309] page dumped because: kasan: bad access detected [ 30.660961] [ 30.661177] Memory state around the buggy address: [ 30.661748] ffff888016b81280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.662610] ffff888016b81300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.663459] >ffff888016b81380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.664306] ^ [ 30.665135] ffff888016b81400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.665987] ffff888016b81480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.666835] ================================================================== [ 30.667830] Disabling lock debugging due to kernel taint [ 32.589449] BUG: Bad rss-counter state mm:00000000d43e880b type:MM_FILEPAGES val:33 [ 32.590722] BUG: Bad rss-counter state mm:00000000d43e880b type:MM_ANONPAGES val:22 [ 33.014240] BUG: Bad rss-counter state mm:00000000c6591b86 type:MM_FILEPAGES val:33 [ 33.015491] BUG: Bad rss-counter state mm:00000000c6591b86 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2753' (ECDSA) to the list of known hosts. 2023/06/21 09:55:05 fuzzer started 2023/06/21 09:55:05 dialing manager at localhost:36067 2023/06/21 09:55:05 checking machine... 2023/06/21 09:55:05 checking revisions... [ 33.642231] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:55:05 testing simple program... [ 33.687040] cgroup: Unknown subsys name 'net' [ 33.740012] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:55:05 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f4bbd819000 CR3=000000000c862000 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=2a4a573089aaf18d6a4c46057477ea16 XMM02=2c67c8bc2e329bc3000000000011a5e0 XMM03=fb795ef6d65770560000000000121a80 XMM04=f768df20df83e8ba00000000000ae988 XMM05=59d5b690e0af863b0000000000131970 XMM06=00c3ffa147b8d85700000000001317f8 XMM07=e042d86d42eb936e0000000000121d00 XMM08=4089d33bb1ba53ab000000000011a640 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0a58c3f RBX=ffff88808df17670 RCX=0000000000000100 RDX=dffffc0000000000 RSI=ffffffff811430fc RDI=0000000000000006 RBP=ffff88800df17670 RSP=ffff88806cf09d80 R8 =0000000000000006 R9 =ffff88800df17670 R10=ffff88808df17670 R11=00000000000b6a61 R12=0000000000000000 R13=ffffea0000642b80 R14=ffffffff813782f8 R15=ffff88800dbc9a80 RIP=ffffffff81143115 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 00007f18dc17b900 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=00007ffccecd9000 CR3=000000000ebf0000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000