syzkaller login: [ 30.673202] BUG: Bad rss-counter state mm:00000000538b61bd type:MM_FILEPAGES val:33 [ 30.674687] BUG: Bad rss-counter state mm:00000000538b61bd type:MM_ANONPAGES val:22 [ 30.839650] ================================================================== [ 30.840593] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.841517] Read of size 8 at addr ffff88800b3b5a50 by task sshd/219 [ 30.842281] [ 30.842497] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.843492] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.844452] Call Trace: [ 30.844765] <TASK> [ 30.845048] dump_stack_lvl+0x91/0xf0 [ 30.845541] print_report+0xcc/0x620 [ 30.846024] ? __virt_addr_valid+0x102/0x340 [ 30.846569] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.847184] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.847792] kasan_report+0xbe/0xf0 [ 30.848269] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.848882] vma_interval_tree_remove+0xc75/0xec0 [ 30.849482] vma_prepare+0xc54/0x11a0 [ 30.849958] __split_vma+0x5af/0x950 [ 30.850431] ? __pfx___split_vma+0x10/0x10 [ 30.850958] ? find_held_lock+0x2c/0x110 [ 30.851505] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.852067] ? lock_is_held_type+0x9f/0x120 [ 30.852604] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.853212] ? mtree_range_walk+0x632/0x900 [ 30.853759] ? mas_walk+0x5c7/0x7c0 [ 30.854233] do_vmi_munmap+0x1f1/0x2b0 [ 30.854721] mmap_region+0x1f9/0x2660 [ 30.855210] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.855720] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.856429] ? __pfx_lock_acquire+0x10/0x10 [ 30.856961] ? __pfx_mmap_region+0x10/0x10 [ 30.857490] ? security_mmap_addr+0x7d/0xa0 [ 30.858018] ? get_unmapped_area+0x1f5/0x3f0 [ 30.858566] do_mmap+0x854/0xf00 [ 30.859002] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.859500] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.860055] ksys_mmap_pgoff+0x3af/0x500 [ 30.860558] do_syscall_64+0x3f/0x90 [ 30.861034] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.861680] RIP: 0033:0x7f6ef7b75d82 [ 30.862134] 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 [ 30.864269] RSP: 002b:00007ffcdeba0508 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.865171] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6ef7b75d82 [ 30.866023] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6ef6faf000 [ 30.866863] RBP: 00007f6ef6faf000 R08: 0000000000000009 R09: 0000000000001000 [ 30.867716] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558f6804bec0 [ 30.868575] R13: 00007ffcdeba0520 R14: 00007ffcdeba0550 R15: 00007ffcdeba08b0 [ 30.869435] </TASK> [ 30.869731] [ 30.869943] Allocated by task 212: [ 30.870376] kasan_save_stack+0x22/0x50 [ 30.870883] kasan_set_track+0x25/0x30 [ 30.871392] __kasan_slab_alloc+0x59/0x70 [ 30.871922] kmem_cache_alloc+0x16b/0x370 [ 30.872447] vm_area_dup+0x20/0x160 [ 30.872910] __split_vma+0x170/0x950 [ 30.873382] split_vma+0xc6/0x110 [ 30.873820] mprotect_fixup+0x8d2/0xb30 [ 30.874328] do_mprotect_pkey+0x87e/0xd40 [ 30.874852] __x64_sys_mprotect+0x78/0xc0 [ 30.875404] do_syscall_64+0x3f/0x90 [ 30.875888] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.876528] [ 30.876740] Freed by task 212: [ 30.877134] kasan_save_stack+0x22/0x50 [ 30.877632] kasan_set_track+0x25/0x30 [ 30.878125] kasan_save_free_info+0x2b/0x50 [ 30.878654] __kasan_slab_free+0x10a/0x190 [ 30.879192] kmem_cache_free+0x10d/0x4d0 [ 30.879697] rcu_core+0x8c8/0x2860 [ 30.880142] __do_softirq+0x1b7/0x7d4 [ 30.880619] [ 30.880844] Last potentially related work creation: [ 30.881430] kasan_save_stack+0x22/0x50 [ 30.881931] __kasan_record_aux_stack+0x8e/0xa0 [ 30.882497] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.883219] remove_vma+0x139/0x170 [ 30.883739] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.884418] do_vmi_munmap+0x1f1/0x2b0 [ 30.884974] __vm_munmap+0x138/0x3a0 [ 30.885507] __x64_sys_munmap+0x59/0x80 [ 30.886074] do_syscall_64+0x3f/0x90 [ 30.886624] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.887382] [ 30.887626] The buggy address belongs to the object at ffff88800b3b59f8 [ 30.887626] which belongs to the cache vm_area_struct of size 168 [ 30.889324] The buggy address is located 88 bytes inside of [ 30.889324] freed 168-byte region [ffff88800b3b59f8, ffff88800b3b5aa0) [ 30.890941] [ 30.891198] The buggy address belongs to the physical page: [ 30.891935] page:000000003ff52ce2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xb3b5 [ 30.893021] memcg:ffff88801a3eac01 [ 30.893448] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.894085] page_type: 0xffffffff() [ 30.894531] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.895463] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a3eac01 [ 30.896364] page dumped because: kasan: bad access detected [ 30.897016] [ 30.897232] Memory state around the buggy address: [ 30.897811] ffff88800b3b5900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.898660] ffff88800b3b5980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.899513] >ffff88800b3b5a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.900360] ^ [ 30.901059] ffff88800b3b5a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.901903] ffff88800b3b5b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.902743] ================================================================== [ 30.903659] Disabling lock debugging due to kernel taint [ 33.009810] BUG: Bad rss-counter state mm:000000007b71370a type:MM_FILEPAGES val:33 [ 33.010952] BUG: Bad rss-counter state mm:000000007b71370a type:MM_ANONPAGES val:22 [ 33.464310] BUG: Bad rss-counter state mm:00000000e9adc822 type:MM_FILEPAGES val:33 [ 33.465537] BUG: Bad rss-counter state mm:00000000e9adc822 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31853' (ECDSA) to the list of known hosts. 2023/06/21 04:59:50 fuzzer started 2023/06/21 04:59:50 dialing manager at localhost:36067 2023/06/21 04:59:50 checking machine... 2023/06/21 04:59:50 checking revisions... [ 34.114954] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:59:51 testing simple program... [ 34.162018] cgroup: Unknown subsys name 'net' [ 34.214248] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:59:50 Registers: info registers vcpu 0 RAX=fffffbfff0ba7a6b RBX=0000000000000000 RCX=ffffffff812d86ea RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=fffffbfff0ba7a6a RSP=ffff88800fc77430 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff8560b640 R13=ffffffff814c8575 R14=ffffffff85652d08 R15=0000000000000000 RIP=ffffffff8180f12f 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 00007fe07b687900 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=00007fe07bc3e618 CR3=0000000016b5a000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f05b8b1e200 CR3=0000000014492000 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=0a604ee61c4fa393104f79832431ba5b XMM02=2c67c8bc2e329bc3000000000011a010 XMM03=fb795ef6d65770560000000000121140 XMM04=5baa6f8ef559dec300000000000ae988 XMM05=dfcdbad4f1609c3700000000001312f0 XMM06=806171799158d9670000000000131178 XMM07=e042d86d42eb936e00000000001213c0 XMM08=519c5688addf29e5000000000011a070 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000