syzkaller login: [ 69.631924] BUG: Bad rss-counter state mm:000000003ff248ab type:MM_FILEPAGES val:33 [ 69.632940] BUG: Bad rss-counter state mm:000000003ff248ab type:MM_ANONPAGES val:22 [ 69.803904] ================================================================== [ 69.804910] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 69.805849] Read of size 8 at addr ffff888009adcd08 by task sshd/226 [ 69.806700] [ 69.806927] CPU: 0 PID: 226 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 69.807970] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 69.808940] Call Trace: [ 69.809262] [ 69.809551] dump_stack_lvl+0x91/0xf0 [ 69.810049] print_report+0xcc/0x620 [ 69.810541] ? __virt_addr_valid+0x102/0x340 [ 69.811100] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.811729] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.812359] kasan_report+0xbe/0xf0 [ 69.812841] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.813465] vma_interval_tree_remove+0xc75/0xec0 [ 69.814086] vma_prepare+0xc54/0x11a0 [ 69.814606] __split_vma+0x5af/0x950 [ 69.815106] ? __pfx___split_vma+0x10/0x10 [ 69.815679] ? find_held_lock+0x2c/0x110 [ 69.816242] do_vmi_align_munmap+0x2ba/0x11f0 [ 69.816843] ? lock_is_held_type+0x9f/0x120 [ 69.817426] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 69.818079] ? mtree_range_walk+0x632/0x900 [ 69.818658] ? mas_walk+0x5c7/0x7c0 [ 69.819160] do_vmi_munmap+0x1f1/0x2b0 [ 69.819707] mmap_region+0x1f9/0x2660 [ 69.820224] ? vm_mmap_pgoff+0x15c/0x3a0 [ 69.820762] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 69.821514] ? __pfx_lock_acquire+0x10/0x10 [ 69.822084] ? __pfx_mmap_region+0x10/0x10 [ 69.822648] ? security_mmap_addr+0x7d/0xa0 [ 69.823209] ? get_unmapped_area+0x1f5/0x3f0 [ 69.823799] do_mmap+0x854/0xf00 [ 69.824262] vm_mmap_pgoff+0x1a6/0x3a0 [ 69.824795] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 69.825394] ksys_mmap_pgoff+0x3af/0x500 [ 69.825942] do_syscall_64+0x3f/0x90 [ 69.826438] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.827117] RIP: 0033:0x7fcef7147d82 [ 69.827637] 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 [ 69.829891] RSP: 002b:00007ffe420f2a38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 69.830841] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcef7147d82 [ 69.831757] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcef6581000 [ 69.832659] RBP: 00007fcef6581000 R08: 0000000000000009 R09: 0000000000001000 [ 69.833570] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558855b47ec0 [ 69.834479] R13: 00007ffe420f2a50 R14: 00007ffe420f2a80 R15: 00007ffe420f2de0 [ 69.835421] [ 69.835732] [ 69.835967] Allocated by task 219: [ 69.836433] kasan_save_stack+0x22/0x50 [ 69.836964] kasan_set_track+0x25/0x30 [ 69.837483] __kasan_slab_alloc+0x59/0x70 [ 69.838039] kmem_cache_alloc+0x16b/0x370 [ 69.838587] vm_area_dup+0x20/0x160 [ 69.839068] __split_vma+0x170/0x950 [ 69.839565] split_vma+0xc6/0x110 [ 69.840041] mprotect_fixup+0x8d2/0xb30 [ 69.840563] do_mprotect_pkey+0x87e/0xd40 [ 69.841107] __x64_sys_mprotect+0x78/0xc0 [ 69.841655] do_syscall_64+0x3f/0x90 [ 69.842157] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.842856] [ 69.843091] Freed by task 219: [ 69.843532] kasan_save_stack+0x22/0x50 [ 69.844077] kasan_set_track+0x25/0x30 [ 69.844611] kasan_save_free_info+0x2b/0x50 [ 69.845169] __kasan_slab_free+0x10a/0x190 [ 69.845724] kmem_cache_free+0x10d/0x4d0 [ 69.846273] rcu_core+0x8c8/0x2860 [ 69.846749] __do_softirq+0x1b7/0x7d4 [ 69.847252] [ 69.847482] Last potentially related work creation: [ 69.848111] kasan_save_stack+0x22/0x50 [ 69.848640] __kasan_record_aux_stack+0x8e/0xa0 [ 69.849241] __call_rcu_common.constprop.0+0x6a/0xb90 [ 69.849933] remove_vma+0x139/0x170 [ 69.850399] do_vmi_align_munmap+0xd4a/0x11f0 [ 69.850991] do_vmi_munmap+0x1f1/0x2b0 [ 69.851532] __vm_munmap+0x138/0x3a0 [ 69.852022] __x64_sys_munmap+0x59/0x80 [ 69.852549] do_syscall_64+0x3f/0x90 [ 69.853050] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.853719] [ 69.853951] The buggy address belongs to the object at ffff888009adccb0 [ 69.853951] which belongs to the cache vm_area_struct of size 168 [ 69.855540] The buggy address is located 88 bytes inside of [ 69.855540] freed 168-byte region [ffff888009adccb0, ffff888009adcd58) [ 69.857040] [ 69.857270] The buggy address belongs to the physical page: [ 69.857989] page:000000008be00e5a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9adc [ 69.859148] memcg:ffff8880183d6601 [ 69.859619] flags: 0x100000000000200(slab|node=0|zone=1) [ 69.860308] page_type: 0xffffffff() [ 69.860793] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 69.861753] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880183d6601 [ 69.862721] page dumped because: kasan: bad access detected [ 69.863444] [ 69.863671] Memory state around the buggy address: [ 69.864285] ffff888009adcc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 69.865208] ffff888009adcc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 69.866115] >ffff888009adcd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 69.867031] ^ [ 69.867505] ffff888009adcd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 69.868416] ffff888009adce00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 69.869333] ================================================================== [ 69.870518] Disabling lock debugging due to kernel taint [ 72.337989] BUG: Bad rss-counter state mm:00000000efa20151 type:MM_FILEPAGES val:33 [ 72.338998] BUG: Bad rss-counter state mm:00000000efa20151 type:MM_ANONPAGES val:22 [ 72.936053] BUG: Bad rss-counter state mm:000000002494bb08 type:MM_FILEPAGES val:33 [ 72.937262] BUG: Bad rss-counter state mm:000000002494bb08 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44515' (ECDSA) to the list of known hosts. 2023/06/20 04:32:06 fuzzer started 2023/06/20 04:32:07 dialing manager at localhost:44161 2023/06/20 04:32:07 checking machine... 2023/06/20 04:32:07 checking revisions... [ 73.584575] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:32:07 testing simple program... [ 73.627310] cgroup: Unknown subsys name 'net' [ 73.665232] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:31:35 Registers: info registers vcpu 0 RAX=1ffff11001e49f1d RBX=ffff88800f24f8b8 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800f24f8e8 RBP=ffff88800eb1b880 RSP=ffff88806ce09dd8 R8 =0000000000000001 R9 =ffffed100d9c13af R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff88800eae3cf0 R14=ffffffff813782a8 R15=ffff88800eae3cf0 RIP=ffffffff81846362 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 00007f1086005900 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=00007f10865ba650 CR3=000000000d974000 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=0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a XMM01=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=7720656c62697461706d6f63206d6874 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00ffffffffffffffffffffffffffffff XMM08=706d6f63206d687469726f676c612023 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007ffdbbe83838 CR3=0000000005482000 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=00007ff683b06510000055f2d66e1790 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