syzkaller login: [ 30.571918] BUG: Bad rss-counter state mm:00000000f0a43f8c type:MM_FILEPAGES val:33 [ 30.572929] BUG: Bad rss-counter state mm:00000000f0a43f8c type:MM_ANONPAGES val:22 [ 30.734968] ================================================================== [ 30.735834] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.736725] Read of size 8 at addr ffff88800f001b38 by task sshd/221 [ 30.737616] [ 30.737829] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.738651] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.739709] Call Trace: [ 30.740190] [ 30.740625] dump_stack_lvl+0x91/0xf0 [ 30.741338] print_report+0xcc/0x620 [ 30.742051] ? __virt_addr_valid+0x102/0x340 [ 30.742846] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.743733] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.744649] kasan_report+0xbe/0xf0 [ 30.745274] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.746025] vma_interval_tree_remove+0xc75/0xec0 [ 30.746752] vma_prepare+0xc54/0x11a0 [ 30.747342] __split_vma+0x5af/0x950 [ 30.747916] ? __pfx___split_vma+0x10/0x10 [ 30.748563] ? find_held_lock+0x2c/0x110 [ 30.749197] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.749876] ? lock_is_held_type+0x9f/0x120 [ 30.750539] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.751282] ? mtree_range_walk+0x632/0x900 [ 30.751943] ? mas_walk+0x5c7/0x7c0 [ 30.752555] do_vmi_munmap+0x1f1/0x2b0 [ 30.753146] mmap_region+0x1f9/0x2660 [ 30.753718] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.754340] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.755203] ? __pfx_lock_acquire+0x10/0x10 [ 30.755849] ? __pfx_mmap_region+0x10/0x10 [ 30.756511] ? security_mmap_addr+0x7d/0xa0 [ 30.757165] ? get_unmapped_area+0x1f5/0x3f0 [ 30.757839] do_mmap+0x854/0xf00 [ 30.758373] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.758976] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.759647] ksys_mmap_pgoff+0x3af/0x500 [ 30.760258] do_syscall_64+0x3f/0x90 [ 30.760845] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.761611] RIP: 0033:0x7f3bf6828d82 [ 30.762166] 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 [ 30.764476] RSP: 002b:00007ffe0efe6778 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.765404] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3bf6828d82 [ 30.766281] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3bf5c62000 [ 30.767145] RBP: 00007f3bf5c62000 R08: 0000000000000009 R09: 0000000000001000 [ 30.768009] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f4475f8d90 [ 30.768866] R13: 00007ffe0efe6790 R14: 00007ffe0efe67c0 R15: 00007ffe0efe6b20 [ 30.769745] [ 30.770034] [ 30.770247] Allocated by task 214: [ 30.770681] kasan_save_stack+0x22/0x50 [ 30.771197] kasan_set_track+0x25/0x30 [ 30.771698] __kasan_slab_alloc+0x59/0x70 [ 30.772238] kmem_cache_alloc+0x16b/0x370 [ 30.772773] vm_area_dup+0x20/0x160 [ 30.773227] __split_vma+0x170/0x950 [ 30.773700] split_vma+0xc6/0x110 [ 30.774147] mprotect_fixup+0x8d2/0xb30 [ 30.774656] do_mprotect_pkey+0x87e/0xd40 [ 30.775189] __x64_sys_mprotect+0x78/0xc0 [ 30.775717] do_syscall_64+0x3f/0x90 [ 30.776206] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.776860] [ 30.777073] Freed by task 13: [ 30.777455] kasan_save_stack+0x22/0x50 [ 30.777959] kasan_set_track+0x25/0x30 [ 30.778532] kasan_save_free_info+0x2b/0x50 [ 30.779059] __kasan_slab_free+0x10a/0x190 [ 30.779595] kmem_cache_free+0x10d/0x4d0 [ 30.780107] rcu_core+0x8c8/0x2860 [ 30.780643] __do_softirq+0x1b7/0x7d4 [ 30.781128] [ 30.781345] Last potentially related work creation: [ 30.781936] kasan_save_stack+0x22/0x50 [ 30.782436] __kasan_record_aux_stack+0x8e/0xa0 [ 30.783020] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.783667] remove_vma+0x139/0x170 [ 30.784136] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.784700] do_vmi_munmap+0x1f1/0x2b0 [ 30.785199] __vm_munmap+0x138/0x3a0 [ 30.785662] __x64_sys_munmap+0x59/0x80 [ 30.786161] do_syscall_64+0x3f/0x90 [ 30.786633] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.787282] [ 30.787501] The buggy address belongs to the object at ffff88800f001ae0 [ 30.787501] which belongs to the cache vm_area_struct of size 168 [ 30.789026] The buggy address is located 88 bytes inside of [ 30.789026] freed 168-byte region [ffff88800f001ae0, ffff88800f001b88) [ 30.790450] [ 30.790668] The buggy address belongs to the physical page: [ 30.791324] page:0000000027f5cbd8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf001 [ 30.792444] memcg:ffff88801957b201 [ 30.792877] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.793526] page_type: 0xffffffff() [ 30.793979] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.794909] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801957b201 [ 30.795829] page dumped because: kasan: bad access detected [ 30.796494] [ 30.796710] Memory state around the buggy address: [ 30.797313] ffff88800f001a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.798168] ffff88800f001a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 30.799029] >ffff88800f001b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.799896] ^ [ 30.800542] ffff88800f001b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.801415] ffff88800f001c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.802267] ================================================================== [ 30.803218] Disabling lock debugging due to kernel taint [ 32.709236] BUG: Bad rss-counter state mm:000000002bf01f9c type:MM_FILEPAGES val:33 [ 32.710410] BUG: Bad rss-counter state mm:000000002bf01f9c type:MM_ANONPAGES val:22 [ 33.107137] BUG: Bad rss-counter state mm:000000003bebcd22 type:MM_FILEPAGES val:33 [ 33.108091] BUG: Bad rss-counter state mm:000000003bebcd22 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56047' (ECDSA) to the list of known hosts. 2023/06/21 04:18:36 fuzzer started 2023/06/21 04:18:37 dialing manager at localhost:36067 2023/06/21 04:18:37 checking machine... 2023/06/21 04:18:37 checking revisions... [ 33.815029] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:18:37 testing simple program... [ 33.858219] cgroup: Unknown subsys name 'net' [ 33.913180] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:18:36 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=00007f97ef897f20 CR3=000000000c638000 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=ada9aba5e1c2848c0c4fe106f36a2ad4 XMM02=2c67c8bc2e329bc3000000000011b5f8 XMM03=fb795ef6d657705600000000001223d8 XMM04=a5f6a063d438c4f600000000000ae988 XMM05=e4cb8bb95a7664b60000000000132248 XMM06=f9e9082d9e5793dc00000000001310b0 XMM07=e042d86d42eb936e0000000000122658 XMM08=3f98a8a66e63d8d5000000000011b658 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888016d9eb00 RCX=0000000000000000 RDX=1ffff11002db3d60 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000001 RSP=ffff88806cf09da0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000548 R13=ffffffff87b6a200 R14=ffff88800db80f00 R15=ffff88806cf361e0 RIP=ffffffff81827b70 RFL=00000046 [---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 00007f204cd22900 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=00007f204d2d9618 CR3=000000001a00e000 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=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