syzkaller login: [ 30.687401] BUG: Bad rss-counter state mm:000000002523874e type:MM_FILEPAGES val:33 [ 30.688781] BUG: Bad rss-counter state mm:000000002523874e type:MM_ANONPAGES val:22 [ 30.841838] ================================================================== [ 30.842947] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.844078] Read of size 8 at addr ffff888019d3a798 by task sshd/220 [ 30.845112] [ 30.845388] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.846431] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.847621] Call Trace: [ 30.847993] [ 30.848332] dump_stack_lvl+0x91/0xf0 [ 30.848915] print_report+0xcc/0x620 [ 30.849523] ? __virt_addr_valid+0x102/0x340 [ 30.850141] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.850793] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.851447] kasan_report+0xbe/0xf0 [ 30.851949] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.852607] vma_interval_tree_remove+0xc75/0xec0 [ 30.853245] vma_prepare+0xc54/0x11a0 [ 30.853764] __split_vma+0x5af/0x950 [ 30.854264] ? __pfx___split_vma+0x10/0x10 [ 30.854826] ? find_held_lock+0x2c/0x110 [ 30.855376] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.855968] ? lock_is_held_type+0x9f/0x120 [ 30.856543] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.857193] ? mtree_range_walk+0x632/0x900 [ 30.857781] ? mas_walk+0x5c7/0x7c0 [ 30.858286] do_vmi_munmap+0x1f1/0x2b0 [ 30.858806] mmap_region+0x1f9/0x2660 [ 30.859315] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.859857] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.860610] ? __pfx_lock_acquire+0x10/0x10 [ 30.861170] ? __pfx_mmap_region+0x10/0x10 [ 30.861750] ? security_mmap_addr+0x7d/0xa0 [ 30.862309] ? get_unmapped_area+0x1f5/0x3f0 [ 30.862888] do_mmap+0x854/0xf00 [ 30.863350] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.863885] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.864510] ksys_mmap_pgoff+0x3af/0x500 [ 30.865047] do_syscall_64+0x3f/0x90 [ 30.865569] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.866263] RIP: 0033:0x7f36ad88fd82 [ 30.866749] 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 [ 30.869033] RSP: 002b:00007ffe30b9c958 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.870024] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f36ad88fd82 [ 30.870930] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f36accc9000 [ 30.871842] RBP: 00007f36accc9000 R08: 0000000000000009 R09: 0000000000001000 [ 30.872751] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556d876afec0 [ 30.873663] R13: 00007ffe30b9c970 R14: 00007ffe30b9c9a0 R15: 00007ffe30b9cd00 [ 30.874578] [ 30.874895] [ 30.875125] Allocated by task 213: [ 30.875588] kasan_save_stack+0x22/0x50 [ 30.876131] kasan_set_track+0x25/0x30 [ 30.876670] __kasan_slab_alloc+0x59/0x70 [ 30.877247] kmem_cache_alloc+0x16b/0x370 [ 30.877816] vm_area_dup+0x20/0x160 [ 30.878308] __split_vma+0x170/0x950 [ 30.878807] split_vma+0xc6/0x110 [ 30.879286] mprotect_fixup+0x8d2/0xb30 [ 30.879820] do_mprotect_pkey+0x87e/0xd40 [ 30.880381] __x64_sys_mprotect+0x78/0xc0 [ 30.880938] do_syscall_64+0x3f/0x90 [ 30.881455] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.882154] [ 30.882381] Freed by task 213: [ 30.882807] kasan_save_stack+0x22/0x50 [ 30.883350] kasan_set_track+0x25/0x30 [ 30.883887] kasan_save_free_info+0x2b/0x50 [ 30.884459] __kasan_slab_free+0x10a/0x190 [ 30.885026] kmem_cache_free+0x10d/0x4d0 [ 30.885619] rcu_core+0x8c8/0x2860 [ 30.886086] __do_softirq+0x1b7/0x7d4 [ 30.886605] [ 30.886835] Last potentially related work creation: [ 30.887468] kasan_save_stack+0x22/0x50 [ 30.888021] __kasan_record_aux_stack+0x8e/0xa0 [ 30.888650] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.889364] remove_vma+0x139/0x170 [ 30.889860] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.890476] do_vmi_munmap+0x1f1/0x2b0 [ 30.891022] __vm_munmap+0x138/0x3a0 [ 30.891529] __x64_sys_munmap+0x59/0x80 [ 30.892074] do_syscall_64+0x3f/0x90 [ 30.892627] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.893312] [ 30.893548] The buggy address belongs to the object at ffff888019d3a740 [ 30.893548] which belongs to the cache vm_area_struct of size 168 [ 30.895106] The buggy address is located 88 bytes inside of [ 30.895106] freed 168-byte region [ffff888019d3a740, ffff888019d3a7e8) [ 30.896579] [ 30.896806] The buggy address belongs to the physical page: [ 30.897527] page:00000000e1fc72b9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19d3a [ 30.898683] memcg:ffff8880164ab901 [ 30.899135] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.899817] page_type: 0xffffffff() [ 30.900291] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.901262] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880164ab901 [ 30.902221] page dumped because: kasan: bad access detected [ 30.902910] [ 30.903138] Memory state around the buggy address: [ 30.903751] ffff888019d3a680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.904656] ffff888019d3a700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.905566] >ffff888019d3a780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.906471] ^ [ 30.906992] ffff888019d3a800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.907890] ffff888019d3a880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.908789] ================================================================== [ 30.909807] Disabling lock debugging due to kernel taint [ 33.039267] BUG: Bad rss-counter state mm:000000003954fdcb type:MM_FILEPAGES val:33 [ 33.040480] BUG: Bad rss-counter state mm:000000003954fdcb type:MM_ANONPAGES val:22 [ 33.558233] BUG: Bad rss-counter state mm:000000009be76ad4 type:MM_FILEPAGES val:33 [ 33.559395] BUG: Bad rss-counter state mm:000000009be76ad4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29544' (ECDSA) to the list of known hosts. 2023/06/20 17:31:29 fuzzer started 2023/06/20 17:31:29 dialing manager at localhost:36067 2023/06/20 17:31:29 checking machine... 2023/06/20 17:31:29 checking revisions... [ 34.217338] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:31:29 testing simple program... [ 34.264847] cgroup: Unknown subsys name 'net' [ 34.301130] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:31:29 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=00007ffcb932b508 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=00007fae55673510000055cc68916790 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=0000000000000000 RCX=ffffffff8113b59b RDX=ffff888015de0000 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff888016f6ff58 RSP=ffff888016f6fed0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000007 R13=00007fb05efd2044 R14=00007fb05efd2044 R15=ffff888008459280 RIP=ffffffff814c027c 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fb05e47e900 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=00007fb05efd2044 CR3=0000000016b76000 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=000000000000000000000000000000ff XMM02=5dc082ff9a02d86e41d4eb995100101c XMM03=0947df15991540fe1034d4ace4f8b08c XMM04=896359c1c640ccd0e737a082f663e011 XMM05=00000000000000000000000000ff00ff XMM06=09475915991540d01034a082e463b011 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000