syzkaller login: [ 35.642062] BUG: Bad rss-counter state mm:00000000e1b29995 type:MM_FILEPAGES val:33 [ 35.642682] BUG: Bad rss-counter state mm:00000000e1b29995 type:MM_ANONPAGES val:22 [ 35.743284] ================================================================== [ 35.743980] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.744684] Read of size 8 at addr ffff88801a1cadf0 by task sshd/221 [ 35.745260] [ 35.745434] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.746102] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.746937] Call Trace: [ 35.747222] [ 35.747453] dump_stack_lvl+0x91/0xf0 [ 35.747833] print_report+0xcc/0x620 [ 35.748195] ? __virt_addr_valid+0x102/0x340 [ 35.748616] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.749095] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.749441] kasan_report+0xbe/0xf0 [ 35.749703] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.750010] vma_interval_tree_remove+0xc75/0xec0 [ 35.750306] vma_prepare+0xc54/0x11a0 [ 35.750559] __split_vma+0x5af/0x950 [ 35.750795] ? __pfx___split_vma+0x10/0x10 [ 35.751056] ? find_held_lock+0x2c/0x110 [ 35.751320] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.751607] ? lock_is_held_type+0x9f/0x120 [ 35.751874] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.752172] ? mtree_range_walk+0x632/0x900 [ 35.752463] ? mas_walk+0x5c7/0x7c0 [ 35.752702] do_vmi_munmap+0x1f1/0x2b0 [ 35.752945] mmap_region+0x1f9/0x2660 [ 35.753193] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.753462] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.753840] ? __pfx_lock_acquire+0x10/0x10 [ 35.754105] ? __pfx_mmap_region+0x10/0x10 [ 35.754368] ? security_mmap_addr+0x7d/0xa0 [ 35.754648] ? get_unmapped_area+0x1f5/0x3f0 [ 35.754921] do_mmap+0x854/0xf00 [ 35.755138] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.755382] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.755671] ksys_mmap_pgoff+0x3af/0x500 [ 35.755921] do_syscall_64+0x3f/0x90 [ 35.756160] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.756490] RIP: 0033:0x7fd9dc5cbd82 [ 35.756717] 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 [ 35.757805] RSP: 002b:00007ffeec601ef8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.758248] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd9dc5cbd82 [ 35.758681] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd9dba05000 [ 35.759097] RBP: 00007fd9dba05000 R08: 0000000000000009 R09: 0000000000001000 [ 35.759518] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563e74852b20 [ 35.759933] R13: 00007ffeec601f10 R14: 00007ffeec601f40 R15: 00007ffeec6022a0 [ 35.760353] [ 35.760506] [ 35.760629] Allocated by task 214: [ 35.760841] kasan_save_stack+0x22/0x50 [ 35.761108] kasan_set_track+0x25/0x30 [ 35.761354] __kasan_slab_alloc+0x59/0x70 [ 35.761652] kmem_cache_alloc+0x16b/0x370 [ 35.761909] vm_area_dup+0x20/0x160 [ 35.762135] __split_vma+0x170/0x950 [ 35.762366] split_vma+0xc6/0x110 [ 35.762626] mprotect_fixup+0x8d2/0xb30 [ 35.762877] do_mprotect_pkey+0x87e/0xd40 [ 35.763135] __x64_sys_mprotect+0x78/0xc0 [ 35.763402] do_syscall_64+0x3f/0x90 [ 35.763656] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.763975] [ 35.764083] Freed by task 13: [ 35.764273] kasan_save_stack+0x22/0x50 [ 35.764533] kasan_set_track+0x25/0x30 [ 35.764779] kasan_save_free_info+0x2b/0x50 [ 35.765051] __kasan_slab_free+0x10a/0x190 [ 35.765367] kmem_cache_free+0x10d/0x4d0 [ 35.765678] rcu_core+0x8c8/0x2860 [ 35.765944] __do_softirq+0x1b7/0x7d4 [ 35.766220] [ 35.766349] Last potentially related work creation: [ 35.766728] kasan_save_stack+0x22/0x50 [ 35.767022] __kasan_record_aux_stack+0x8e/0xa0 [ 35.767366] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.767760] remove_vma+0x139/0x170 [ 35.768029] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.768356] do_vmi_munmap+0x1f1/0x2b0 [ 35.768651] __vm_munmap+0x138/0x3a0 [ 35.768921] __x64_sys_munmap+0x59/0x80 [ 35.769227] do_syscall_64+0x3f/0x90 [ 35.769517] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.769864] [ 35.769978] The buggy address belongs to the object at ffff88801a1cad98 [ 35.769978] which belongs to the cache vm_area_struct of size 168 [ 35.770889] The buggy address is located 88 bytes inside of [ 35.770889] freed 168-byte region [ffff88801a1cad98, ffff88801a1cae40) [ 35.771735] [ 35.771863] The buggy address belongs to the physical page: [ 35.772252] page:0000000074754d54 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a1ca [ 35.772899] memcg:ffff888016bfda01 [ 35.773158] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.773543] page_type: 0xffffffff() [ 35.773807] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 35.774351] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016bfda01 [ 35.774912] page dumped because: kasan: bad access detected [ 35.775298] [ 35.775436] Memory state around the buggy address: [ 35.775778] ffff88801a1cac80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 35.776273] ffff88801a1cad00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 35.776783] >ffff88801a1cad80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 35.777292] ^ [ 35.777776] ffff88801a1cae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 35.778280] ffff88801a1cae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.778817] ================================================================== [ 35.779396] Disabling lock debugging due to kernel taint [ 37.195549] BUG: Bad rss-counter state mm:000000000ccb31b3 type:MM_FILEPAGES val:33 [ 37.196140] BUG: Bad rss-counter state mm:000000000ccb31b3 type:MM_ANONPAGES val:22 [ 37.545553] BUG: Bad rss-counter state mm:000000003ecd4c23 type:MM_FILEPAGES val:33 [ 37.546724] BUG: Bad rss-counter state mm:000000003ecd4c23 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22506' (ECDSA) to the list of known hosts. 2023/06/21 00:08:30 fuzzer started 2023/06/21 00:08:34 dialing manager at localhost:36067 2023/06/21 00:08:34 checking machine... 2023/06/21 00:08:34 checking revisions... [ 41.520378] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:08:34 testing simple program... [ 41.581318] cgroup: Unknown subsys name 'net' [ 41.634725] cgroup: Unknown subsys name 'rlimit' executing program executing program VM DIAGNOSIS: 00:08:30 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=0000000000000001 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=00007ffe65689b08 CR3=0000000005482000 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=00007f9ed277b510000055a9c87bd790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=0000000000002800 RSI=0000000000000012 RDI=ffff88801a01f108 RBP=ffff8880084c6140 RSP=ffff88801a01f098 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000002800 R14=ffff88801a01f108 R15=0000000000000000 RIP=ffffffff813ad5f0 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 00007ff5f890f900 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=00007ff5f88ac008 CR3=0000000009d4a000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000