syzkaller login: [ 30.574986] BUG: Bad rss-counter state mm:00000000cf5670f9 type:MM_FILEPAGES val:33 [ 30.576005] BUG: Bad rss-counter state mm:00000000cf5670f9 type:MM_ANONPAGES val:22 [ 30.737223] ================================================================== [ 30.738346] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.739456] Read of size 8 at addr ffff888016d2ca50 by task sshd/219 [ 30.740555] [ 30.740827] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.741821] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.742839] Call Trace: [ 30.743156] [ 30.743444] dump_stack_lvl+0x91/0xf0 [ 30.743939] print_report+0xcc/0x620 [ 30.744430] ? __virt_addr_valid+0x102/0x340 [ 30.744978] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.745608] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.746235] kasan_report+0xbe/0xf0 [ 30.746712] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.747331] vma_interval_tree_remove+0xc75/0xec0 [ 30.747936] vma_prepare+0xc54/0x11a0 [ 30.748413] __split_vma+0x5af/0x950 [ 30.748883] ? __pfx___split_vma+0x10/0x10 [ 30.749439] ? find_held_lock+0x2c/0x110 [ 30.749967] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.750546] ? lock_is_held_type+0x9f/0x120 [ 30.751088] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.751701] ? mtree_range_walk+0x632/0x900 [ 30.752255] ? mas_walk+0x5c7/0x7c0 [ 30.752733] do_vmi_munmap+0x1f1/0x2b0 [ 30.753225] mmap_region+0x1f9/0x2660 [ 30.753723] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.754241] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.754957] ? __pfx_lock_acquire+0x10/0x10 [ 30.755496] ? __pfx_mmap_region+0x10/0x10 [ 30.756036] ? security_mmap_addr+0x7d/0xa0 [ 30.756567] ? get_unmapped_area+0x1f5/0x3f0 [ 30.757116] do_mmap+0x854/0xf00 [ 30.757562] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.758062] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.758628] ksys_mmap_pgoff+0x3af/0x500 [ 30.759138] do_syscall_64+0x3f/0x90 [ 30.759620] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.760279] RIP: 0033:0x7f2f5e708d82 [ 30.760738] 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 [ 30.762888] RSP: 002b:00007ffe7a20ed58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.763814] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2f5e708d82 [ 30.764682] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2f5db42000 [ 30.765543] RBP: 00007f2f5db42000 R08: 0000000000000009 R09: 0000000000001000 [ 30.766402] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c53e7f8f70 [ 30.767246] R13: 00007ffe7a20ed70 R14: 00007ffe7a20eda0 R15: 00007ffe7a20f100 [ 30.768110] [ 30.768406] [ 30.768624] Allocated by task 212: [ 30.769059] kasan_save_stack+0x22/0x50 [ 30.769580] kasan_set_track+0x25/0x30 [ 30.770086] __kasan_slab_alloc+0x59/0x70 [ 30.770619] kmem_cache_alloc+0x16b/0x370 [ 30.771138] vm_area_dup+0x20/0x160 [ 30.771598] __split_vma+0x170/0x950 [ 30.772065] split_vma+0xc6/0x110 [ 30.772513] mprotect_fixup+0x8d2/0xb30 [ 30.773019] do_mprotect_pkey+0x87e/0xd40 [ 30.773550] __x64_sys_mprotect+0x78/0xc0 [ 30.774075] do_syscall_64+0x3f/0x90 [ 30.774554] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.775229] [ 30.775451] Freed by task 202: [ 30.775848] kasan_save_stack+0x22/0x50 [ 30.776356] kasan_set_track+0x25/0x30 [ 30.776857] kasan_save_free_info+0x2b/0x50 [ 30.777407] __kasan_slab_free+0x10a/0x190 [ 30.777951] kmem_cache_free+0x10d/0x4d0 [ 30.778467] rcu_core+0x8c8/0x2860 [ 30.778932] __do_softirq+0x1b7/0x7d4 [ 30.779420] [ 30.779636] Last potentially related work creation: [ 30.780228] kasan_save_stack+0x22/0x50 [ 30.780733] __kasan_record_aux_stack+0x8e/0xa0 [ 30.781453] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.782098] remove_vma+0x139/0x170 [ 30.782547] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.783111] do_vmi_munmap+0x1f1/0x2b0 [ 30.783603] __vm_munmap+0x138/0x3a0 [ 30.784071] __x64_sys_munmap+0x59/0x80 [ 30.784570] do_syscall_64+0x3f/0x90 [ 30.785051] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.785721] [ 30.785944] The buggy address belongs to the object at ffff888016d2c9f8 [ 30.785944] which belongs to the cache vm_area_struct of size 168 [ 30.787423] The buggy address is located 88 bytes inside of [ 30.787423] freed 168-byte region [ffff888016d2c9f8, ffff888016d2caa0) [ 30.788836] [ 30.789051] The buggy address belongs to the physical page: [ 30.789721] page:0000000092455a45 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16d2c [ 30.790822] memcg:ffff888014650601 [ 30.791253] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.791897] page_type: 0xffffffff() [ 30.792356] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.793292] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014650601 [ 30.794198] page dumped because: kasan: bad access detected [ 30.794857] [ 30.795072] Memory state around the buggy address: [ 30.795661] ffff888016d2c900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.796517] ffff888016d2c980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.797408] >ffff888016d2ca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.798262] ^ [ 30.798966] ffff888016d2ca80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.799818] ffff888016d2cb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.800671] ================================================================== [ 30.801592] Disabling lock debugging due to kernel taint [ 32.993992] BUG: Bad rss-counter state mm:000000000d09dd1d type:MM_FILEPAGES val:33 [ 32.995383] BUG: Bad rss-counter state mm:000000000d09dd1d type:MM_ANONPAGES val:22 [ 33.475387] BUG: Bad rss-counter state mm:00000000627da717 type:MM_FILEPAGES val:33 [ 33.476342] BUG: Bad rss-counter state mm:00000000627da717 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14908' (ECDSA) to the list of known hosts. 2023/06/21 07:05:42 fuzzer started 2023/06/21 07:05:42 dialing manager at localhost:36067 2023/06/21 07:05:42 checking machine... 2023/06/21 07:05:42 checking revisions... [ 34.128247] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:05:42 testing simple program... [ 34.177154] cgroup: Unknown subsys name 'net' [ 34.216725] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:05:42 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=ffff888019fe3680 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff814c8467 RDI=ffff888019fe3a74 RBP=ffff888019fe3680 RSP=ffff888015e37780 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=00007f81dcff6477 R13=0000000000000000 R14=ffff888019fe3680 R15=0000000000092cc0 RIP=ffffffff8135bd89 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 00007f81dcb03900 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=00007f81dd0b8650 CR3=000000000b3dc000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007fb4abdec3d0 CR3=000000000c592000 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=572122c230cb89900345a93030524d8d XMM02=0000000000119f98d59e07bde36eea69 XMM03=000000000011a0c0ec2efd57dc4c00df XMM04=30bbe680b723f1e900000000000ae988 XMM05=56c7ea3860a4a6da00000000001323f0 XMM06=dfcdbad4f1609c370000000000131288 XMM07=fb795ef6d65770560000000000121410 XMM08=2c67c8bc2e329bc3000000000011a0c0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000