syzkaller login: [ 31.679933] BUG: Bad rss-counter state mm:000000000c15b201 type:MM_FILEPAGES val:33 [ 31.681336] BUG: Bad rss-counter state mm:000000000c15b201 type:MM_ANONPAGES val:22 [ 31.840736] ================================================================== [ 31.841829] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.842937] Read of size 8 at addr ffff8880145aedf0 by task sshd/219 [ 31.844004] [ 31.844268] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.845151] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.846129] Call Trace: [ 31.846444] [ 31.846725] dump_stack_lvl+0x91/0xf0 [ 31.847214] print_report+0xcc/0x620 [ 31.847703] ? __virt_addr_valid+0x102/0x340 [ 31.848254] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.848866] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.849482] kasan_report+0xbe/0xf0 [ 31.849997] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.850638] vma_interval_tree_remove+0xc75/0xec0 [ 31.851264] vma_prepare+0xc54/0x11a0 [ 31.851760] __split_vma+0x5af/0x950 [ 31.852247] ? __pfx___split_vma+0x10/0x10 [ 31.852796] ? find_held_lock+0x2c/0x110 [ 31.853340] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.853952] ? lock_is_held_type+0x9f/0x120 [ 31.854508] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.855150] ? mtree_range_walk+0x632/0x900 [ 31.855716] ? mas_walk+0x5c7/0x7c0 [ 31.856201] do_vmi_munmap+0x1f1/0x2b0 [ 31.856710] mmap_region+0x1f9/0x2660 [ 31.857212] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.857755] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.858486] ? __pfx_lock_acquire+0x10/0x10 [ 31.859038] ? __pfx_mmap_region+0x10/0x10 [ 31.859577] ? security_mmap_addr+0x7d/0xa0 [ 31.860119] ? get_unmapped_area+0x1f5/0x3f0 [ 31.860682] do_mmap+0x854/0xf00 [ 31.861137] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.861642] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.862233] ksys_mmap_pgoff+0x3af/0x500 [ 31.862754] do_syscall_64+0x3f/0x90 [ 31.863256] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.863925] RIP: 0033:0x7f998f5efd82 [ 31.864396] 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 [ 31.866612] RSP: 002b:00007ffe9d667cf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.867553] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f998f5efd82 [ 31.868426] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f998ea29000 [ 31.869303] RBP: 00007f998ea29000 R08: 0000000000000009 R09: 0000000000001000 [ 31.870177] R10: 0000000000000812 R11: 0000000000000206 R12: 000056418b471f70 [ 31.871050] R13: 00007ffe9d667d10 R14: 00007ffe9d667d40 R15: 00007ffe9d6680a0 [ 31.871938] [ 31.872234] [ 31.872457] Allocated by task 212: [ 31.872905] kasan_save_stack+0x22/0x50 [ 31.873422] kasan_set_track+0x25/0x30 [ 31.873949] __kasan_slab_alloc+0x59/0x70 [ 31.874491] kmem_cache_alloc+0x16b/0x370 [ 31.875023] vm_area_dup+0x20/0x160 [ 31.875487] __split_vma+0x170/0x950 [ 31.875972] split_vma+0xc6/0x110 [ 31.876428] mprotect_fixup+0x8d2/0xb30 [ 31.876951] do_mprotect_pkey+0x87e/0xd40 [ 31.877485] __x64_sys_mprotect+0x78/0xc0 [ 31.878030] do_syscall_64+0x3f/0x90 [ 31.878519] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.879191] [ 31.879409] Freed by task 212: [ 31.879812] kasan_save_stack+0x22/0x50 [ 31.880321] kasan_set_track+0x25/0x30 [ 31.880825] kasan_save_free_info+0x2b/0x50 [ 31.881375] __kasan_slab_free+0x10a/0x190 [ 31.881933] kmem_cache_free+0x10d/0x4d0 [ 31.882458] rcu_core+0x8c8/0x2860 [ 31.882918] __do_softirq+0x1b7/0x7d4 [ 31.883407] [ 31.883626] Last potentially related work creation: [ 31.884230] kasan_save_stack+0x22/0x50 [ 31.884765] __kasan_record_aux_stack+0x8e/0xa0 [ 31.885356] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.886038] remove_vma+0x139/0x170 [ 31.886503] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.887085] do_vmi_munmap+0x1f1/0x2b0 [ 31.887592] __vm_munmap+0x138/0x3a0 [ 31.888072] __x64_sys_munmap+0x59/0x80 [ 31.888580] do_syscall_64+0x3f/0x90 [ 31.889071] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.889744] [ 31.889964] The buggy address belongs to the object at ffff8880145aed98 [ 31.889964] which belongs to the cache vm_area_struct of size 168 [ 31.891489] The buggy address is located 88 bytes inside of [ 31.891489] freed 168-byte region [ffff8880145aed98, ffff8880145aee40) [ 31.892944] [ 31.893168] The buggy address belongs to the physical page: [ 31.893872] page:00000000aea9148c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x145ae [ 31.894993] memcg:ffff8880144ca701 [ 31.895432] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.896100] page_type: 0xffffffff() [ 31.896573] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.897527] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880144ca701 [ 31.898467] page dumped because: kasan: bad access detected [ 31.899152] [ 31.899371] Memory state around the buggy address: [ 31.899968] ffff8880145aec80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.900857] ffff8880145aed00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.901738] >ffff8880145aed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.902615] ^ [ 31.903449] ffff8880145aee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.904337] ffff8880145aee80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.905226] ================================================================== [ 31.906185] Disabling lock debugging due to kernel taint [ 33.701572] BUG: Bad rss-counter state mm:00000000c017e8a8 type:MM_FILEPAGES val:33 [ 33.702352] BUG: Bad rss-counter state mm:00000000c017e8a8 type:MM_ANONPAGES val:22 [ 34.245945] BUG: Bad rss-counter state mm:0000000076523fd6 type:MM_FILEPAGES val:33 [ 34.247127] BUG: Bad rss-counter state mm:0000000076523fd6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18700' (ECDSA) to the list of known hosts. 2023/06/20 13:15:30 fuzzer started 2023/06/20 13:15:30 dialing manager at localhost:36067 2023/06/20 13:15:30 checking machine... 2023/06/20 13:15:30 checking revisions... [ 34.855742] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:15:30 testing simple program... [ 34.901347] cgroup: Unknown subsys name 'net' [ 34.940743] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:15:30 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888008d9f978 RCX=0000000000000001 RDX=1ffff110011b3f3a RSI=ffff888008d9fcf0 RDI=ffffffff81809add RBP=ffff888008d9f9d0 RSP=ffff888008d9f960 R8 =0000000000000001 R9 =ffff888008d9f9b8 R10=0000000000038001 R11=0000000000020db7 R12=ffff888008d9fa40 R13=0000000000000000 R14=ffff888008d90000 R15=ffff88801a22bb30 RIP=ffffffff811303b2 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 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=00007f11bea5c618 CR3=000000000e56c000 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=ffff888008c04400 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=00007ff80d53db20 CR3=000000000c484000 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=412e03f49de3f1850145dd89aa02dbd1 XMM02=000000000011bcd0ec2efd57dc4c00df XMM03=00000000001225d084dcce8643633bb9 XMM04=bc30d16ced500dfe00000000000ae988 XMM05=dfcdbad4f1609c3700000000001323b0 XMM06=6fd31721bafaecfe0000000000131218 XMM07=e042d86d42eb936e0000000000122850 XMM08=84dcce8643633bb9000000000011bd30 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000