syzkaller login: [ 30.193248] BUG: Bad rss-counter state mm:000000004014046a type:MM_FILEPAGES val:33 [ 30.194466] BUG: Bad rss-counter state mm:000000004014046a type:MM_ANONPAGES val:22 [ 30.299403] ================================================================== [ 30.300504] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.301630] Read of size 8 at addr ffff888017a593f8 by task sshd/220 [ 30.302646] [ 30.302820] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.303328] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.303909] Call Trace: [ 30.304128] [ 30.304306] dump_stack_lvl+0x91/0xf0 [ 30.304595] print_report+0xcc/0x620 [ 30.304885] ? __virt_addr_valid+0x102/0x340 [ 30.305214] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.305589] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.305959] kasan_report+0xbe/0xf0 [ 30.306233] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.306611] vma_interval_tree_remove+0xc75/0xec0 [ 30.306977] vma_prepare+0xc54/0x11a0 [ 30.307261] __split_vma+0x5af/0x950 [ 30.307541] ? __pfx___split_vma+0x10/0x10 [ 30.307871] ? find_held_lock+0x2c/0x110 [ 30.308207] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.308567] ? lock_is_held_type+0x9f/0x120 [ 30.308916] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.309309] ? mtree_range_walk+0x632/0x900 [ 30.309652] ? mas_walk+0x5c7/0x7c0 [ 30.309952] do_vmi_munmap+0x1f1/0x2b0 [ 30.310261] mmap_region+0x1f9/0x2660 [ 30.310562] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.310889] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.311349] ? __pfx_lock_acquire+0x10/0x10 [ 30.311691] ? __pfx_mmap_region+0x10/0x10 [ 30.312021] ? security_mmap_addr+0x7d/0xa0 [ 30.312368] ? get_unmapped_area+0x1f5/0x3f0 [ 30.312714] do_mmap+0x854/0xf00 [ 30.312986] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.313294] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.313642] ksys_mmap_pgoff+0x3af/0x500 [ 30.313961] do_syscall_64+0x3f/0x90 [ 30.314261] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.314668] RIP: 0033:0x7f107a5f9d82 [ 30.314959] 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 [ 30.316335] RSP: 002b:00007ffde4b1f278 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.316913] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f107a5f9d82 [ 30.317454] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1079a33000 [ 30.317997] RBP: 00007f1079a33000 R08: 0000000000000009 R09: 0000000000001000 [ 30.318534] R10: 0000000000000812 R11: 0000000000000206 R12: 000055aa8f0a1ec0 [ 30.319074] R13: 00007ffde4b1f290 R14: 00007ffde4b1f2c0 R15: 00007ffde4b1f620 [ 30.319623] [ 30.319811] [ 30.319946] Allocated by task 213: [ 30.320219] kasan_save_stack+0x22/0x50 [ 30.320550] kasan_set_track+0x25/0x30 [ 30.320864] __kasan_slab_alloc+0x59/0x70 [ 30.321198] kmem_cache_alloc+0x16b/0x370 [ 30.321523] vm_area_dup+0x20/0x160 [ 30.321815] __split_vma+0x170/0x950 [ 30.322112] split_vma+0xc6/0x110 [ 30.322389] mprotect_fixup+0x8d2/0xb30 [ 30.322711] do_mprotect_pkey+0x87e/0xd40 [ 30.323046] __x64_sys_mprotect+0x78/0xc0 [ 30.323370] do_syscall_64+0x3f/0x90 [ 30.323662] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.324064] [ 30.324200] Freed by task 213: [ 30.324455] kasan_save_stack+0x22/0x50 [ 30.324776] kasan_set_track+0x25/0x30 [ 30.325085] kasan_save_free_info+0x2b/0x50 [ 30.325422] __kasan_slab_free+0x10a/0x190 [ 30.325757] kmem_cache_free+0x10d/0x4d0 [ 30.326083] rcu_core+0x8c8/0x2860 [ 30.326361] __do_softirq+0x1b7/0x7d4 [ 30.326658] [ 30.326794] Last potentially related work creation: [ 30.327161] kasan_save_stack+0x22/0x50 [ 30.327478] __kasan_record_aux_stack+0x8e/0xa0 [ 30.327844] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.328264] remove_vma+0x139/0x170 [ 30.328554] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.328903] do_vmi_munmap+0x1f1/0x2b0 [ 30.329214] __vm_munmap+0x138/0x3a0 [ 30.329512] __x64_sys_munmap+0x59/0x80 [ 30.329823] do_syscall_64+0x3f/0x90 [ 30.330124] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.330527] [ 30.330665] The buggy address belongs to the object at ffff888017a593a0 [ 30.330665] which belongs to the cache vm_area_struct of size 168 [ 30.331613] The buggy address is located 88 bytes inside of [ 30.331613] freed 168-byte region [ffff888017a593a0, ffff888017a59448) [ 30.332513] [ 30.332647] The buggy address belongs to the physical page: [ 30.333075] page:00000000d6f17797 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17a59 [ 30.333769] memcg:ffff88800ed1e601 [ 30.334039] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.334447] page_type: 0xffffffff() [ 30.334729] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.335313] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed1e601 [ 30.335892] page dumped because: kasan: bad access detected [ 30.336328] [ 30.336458] Memory state around the buggy address: [ 30.336831] ffff888017a59280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.337398] ffff888017a59300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.337950] >ffff888017a59380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.338499] ^ [ 30.339036] ffff888017a59400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.339580] ffff888017a59480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.340122] ================================================================== [ 30.340778] Disabling lock debugging due to kernel taint [ 32.116919] BUG: Bad rss-counter state mm:00000000636a13ff type:MM_FILEPAGES val:33 [ 32.118276] BUG: Bad rss-counter state mm:00000000636a13ff type:MM_ANONPAGES val:22 [ 32.603173] BUG: Bad rss-counter state mm:0000000008766906 type:MM_FILEPAGES val:33 [ 32.604296] BUG: Bad rss-counter state mm:0000000008766906 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14431' (ECDSA) to the list of known hosts. 2023/06/20 03:48:14 fuzzer started 2023/06/20 03:48:14 dialing manager at localhost:44161 2023/06/20 03:48:14 checking machine... 2023/06/20 03:48:14 checking revisions... [ 33.330950] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:48:14 testing simple program... [ 33.392568] cgroup: Unknown subsys name 'net' [ 33.432262] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:48:13 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff11002b19e85 RCX=ffffffff812d8ec3 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000000 RSP=ffff8880158cf410 R8 =0000000000000000 R9 =0000000000000000 R10=000000000000000b R11=0000093f0000093f R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8180fd28 RFL=00000256 [---ZAP-] 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 00007f293e826900 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=00007f293eddd618 CR3=000000000eb9e000 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=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=00007fec2a1d9820 CR3=000000000f386000 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=eb0209fc823909b2e24a997cd742d9b6 XMM02=2c67c8bc2e329bc300000000001233e8 XMM03=fb795ef6d65770560000000000126b00 XMM04=e8ca4446eb59cac000000000000ae988 XMM05=19e9129bd510f2350000000000135ea8 XMM06=3627beaa46ce74130000000000134d10 XMM07=e042d86d42eb936e0000000000126d80 XMM08=9220457d39121c7e0000000000123448 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000