syzkaller login: [ 31.228011] BUG: Bad rss-counter state mm:00000000ac8c5813 type:MM_FILEPAGES val:33 [ 31.229196] BUG: Bad rss-counter state mm:00000000ac8c5813 type:MM_ANONPAGES val:22 [ 31.388576] ================================================================== [ 31.389476] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.390424] Read of size 8 at addr ffff888018ef4228 by task sshd/220 [ 31.391200] [ 31.391416] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.392379] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.393351] Call Trace: [ 31.393669] [ 31.393948] dump_stack_lvl+0x91/0xf0 [ 31.394449] print_report+0xcc/0x620 [ 31.394946] ? __virt_addr_valid+0x102/0x340 [ 31.395493] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.396104] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.396710] kasan_report+0xbe/0xf0 [ 31.397182] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.397797] vma_interval_tree_remove+0xc75/0xec0 [ 31.398403] vma_prepare+0xc54/0x11a0 [ 31.398905] __split_vma+0x5af/0x950 [ 31.399378] ? __pfx___split_vma+0x10/0x10 [ 31.399907] ? find_held_lock+0x2c/0x110 [ 31.400423] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.400983] ? lock_is_held_type+0x9f/0x120 [ 31.401529] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.402132] ? mtree_range_walk+0x632/0x900 [ 31.402693] ? mas_walk+0x5c7/0x7c0 [ 31.403169] do_vmi_munmap+0x1f1/0x2b0 [ 31.403653] mmap_region+0x1f9/0x2660 [ 31.404133] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.404638] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.405349] ? __pfx_lock_acquire+0x10/0x10 [ 31.405881] ? __pfx_mmap_region+0x10/0x10 [ 31.406407] ? security_mmap_addr+0x7d/0xa0 [ 31.406962] ? get_unmapped_area+0x1f5/0x3f0 [ 31.407505] do_mmap+0x854/0xf00 [ 31.407944] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.408440] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.408996] ksys_mmap_pgoff+0x3af/0x500 [ 31.409499] do_syscall_64+0x3f/0x90 [ 31.409981] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.410626] RIP: 0033:0x7fd33c59ad82 [ 31.411083] 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 [ 31.413185] RSP: 002b:00007ffc7096dbd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.414089] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd33c59ad82 [ 31.414939] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd33b9d4000 [ 31.415781] RBP: 00007fd33b9d4000 R08: 0000000000000009 R09: 0000000000001000 [ 31.416620] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d270e16ec0 [ 31.417467] R13: 00007ffc7096dbf0 R14: 00007ffc7096dc20 R15: 00007ffc7096df80 [ 31.418327] [ 31.418637] [ 31.418850] Allocated by task 213: [ 31.419279] kasan_save_stack+0x22/0x50 [ 31.419784] kasan_set_track+0x25/0x30 [ 31.420274] __kasan_slab_alloc+0x59/0x70 [ 31.420793] kmem_cache_alloc+0x16b/0x370 [ 31.421301] vm_area_dup+0x20/0x160 [ 31.421751] __split_vma+0x170/0x950 [ 31.422210] split_vma+0xc6/0x110 [ 31.422655] mprotect_fixup+0x8d2/0xb30 [ 31.423150] do_mprotect_pkey+0x87e/0xd40 [ 31.423669] __x64_sys_mprotect+0x78/0xc0 [ 31.424183] do_syscall_64+0x3f/0x90 [ 31.424658] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.425299] [ 31.425514] Freed by task 213: [ 31.425903] kasan_save_stack+0x22/0x50 [ 31.426402] kasan_set_track+0x25/0x30 [ 31.426913] kasan_save_free_info+0x2b/0x50 [ 31.427442] __kasan_slab_free+0x10a/0x190 [ 31.427971] kmem_cache_free+0x10d/0x4d0 [ 31.428475] rcu_core+0x8c8/0x2860 [ 31.428917] __do_softirq+0x1b7/0x7d4 [ 31.429392] [ 31.429608] Last potentially related work creation: [ 31.430186] kasan_save_stack+0x22/0x50 [ 31.430710] __kasan_record_aux_stack+0x8e/0xa0 [ 31.431284] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.431923] remove_vma+0x139/0x170 [ 31.432372] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.432928] do_vmi_munmap+0x1f1/0x2b0 [ 31.433414] __vm_munmap+0x138/0x3a0 [ 31.433880] __x64_sys_munmap+0x59/0x80 [ 31.434372] do_syscall_64+0x3f/0x90 [ 31.434862] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.435499] [ 31.435712] The buggy address belongs to the object at ffff888018ef41d0 [ 31.435712] which belongs to the cache vm_area_struct of size 168 [ 31.437175] The buggy address is located 88 bytes inside of [ 31.437175] freed 168-byte region [ffff888018ef41d0, ffff888018ef4278) [ 31.438592] [ 31.438805] The buggy address belongs to the physical page: [ 31.439459] page:00000000dd41eb98 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18ef4 [ 31.440544] memcg:ffff888018ef5001 [ 31.440969] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.441618] page_type: 0xffffffff() [ 31.442079] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.443004] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018ef5001 [ 31.443904] page dumped because: kasan: bad access detected [ 31.444565] [ 31.444783] Memory state around the buggy address: [ 31.445359] ffff888018ef4100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.446219] ffff888018ef4180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.447096] >ffff888018ef4200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.447950] ^ [ 31.448499] ffff888018ef4280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.449355] ffff888018ef4300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.450209] ================================================================== [ 31.451568] Disabling lock debugging due to kernel taint [ 33.794517] BUG: Bad rss-counter state mm:0000000082c74799 type:MM_FILEPAGES val:33 [ 33.795359] BUG: Bad rss-counter state mm:0000000082c74799 type:MM_ANONPAGES val:22 [ 34.297169] BUG: Bad rss-counter state mm:0000000044db41c2 type:MM_FILEPAGES val:33 [ 34.298162] BUG: Bad rss-counter state mm:0000000044db41c2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42157' (ECDSA) to the list of known hosts. 2023/06/21 07:14:25 fuzzer started 2023/06/21 07:14:25 dialing manager at localhost:36067 2023/06/21 07:14:25 checking machine... 2023/06/21 07:14:25 checking revisions... [ 34.973221] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:14:25 testing simple program... [ 35.017487] cgroup: Unknown subsys name 'net' [ 35.053708] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:14:25 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=00007f4f673b6000 CR3=000000000c562000 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=347efa83e259b3954b49c3363eff50df XMM02=2c67c8bc2e329bc3000000000011a978 XMM03=fb795ef6d65770560000000000121b40 XMM04=439a83666392742f00000000000ae988 XMM05=19e9129bd510f23500000000001319a8 XMM06=80197287898fa0110000000000130810 XMM07=e042d86d42eb936e0000000000121dc0 XMM08=77a94e757d945725000000000011a9d8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888009a6f148 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff888018d2f500 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000a1c00000a1c R12=0000000000000000 R13=0000000000000029 R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff83ab1908 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 00007f99b6358900 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=00007fffeb75cff8 CR3=000000000e25c000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000