syzkaller login: [ 30.495839] BUG: Bad rss-counter state mm:000000009fed8aed type:MM_FILEPAGES val:33 [ 30.497191] BUG: Bad rss-counter state mm:000000009fed8aed type:MM_ANONPAGES val:22 [ 30.635100] ================================================================== [ 30.635978] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.636904] Read of size 8 at addr ffff8880180874e0 by task sshd/220 [ 30.637651] [ 30.637864] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.638887] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.639856] Call Trace: [ 30.640168] [ 30.640444] dump_stack_lvl+0x91/0xf0 [ 30.640924] print_report+0xcc/0x620 [ 30.641414] ? __virt_addr_valid+0x102/0x340 [ 30.641948] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.642554] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.643156] kasan_report+0xbe/0xf0 [ 30.643635] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.644243] vma_interval_tree_remove+0xc75/0xec0 [ 30.644836] vma_prepare+0xc54/0x11a0 [ 30.645306] __split_vma+0x5af/0x950 [ 30.645766] ? __pfx___split_vma+0x10/0x10 [ 30.646289] ? find_held_lock+0x2c/0x110 [ 30.646800] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.647354] ? lock_is_held_type+0x9f/0x120 [ 30.647890] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.648484] ? mtree_range_walk+0x632/0x900 [ 30.649026] ? mas_walk+0x5c7/0x7c0 [ 30.649492] do_vmi_munmap+0x1f1/0x2b0 [ 30.649983] mmap_region+0x1f9/0x2660 [ 30.650454] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.650954] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.651659] ? __pfx_lock_acquire+0x10/0x10 [ 30.652187] ? __pfx_mmap_region+0x10/0x10 [ 30.652708] ? security_mmap_addr+0x7d/0xa0 [ 30.653227] ? get_unmapped_area+0x1f5/0x3f0 [ 30.653764] do_mmap+0x854/0xf00 [ 30.654200] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.654687] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.655243] ksys_mmap_pgoff+0x3af/0x500 [ 30.655744] do_syscall_64+0x3f/0x90 [ 30.656216] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.656846] RIP: 0033:0x7fad23393d82 [ 30.657287] 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 [ 30.659352] RSP: 002b:00007ffc78f509e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.660262] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fad23393d82 [ 30.661092] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fad227cd000 [ 30.661916] RBP: 00007fad227cd000 R08: 0000000000000009 R09: 0000000000001000 [ 30.662749] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c15c548f70 [ 30.663597] R13: 00007ffc78f50a00 R14: 00007ffc78f50a30 R15: 00007ffc78f50d90 [ 30.664440] [ 30.664728] [ 30.664937] Allocated by task 213: [ 30.665375] kasan_save_stack+0x22/0x50 [ 30.665866] kasan_set_track+0x25/0x30 [ 30.666348] __kasan_slab_alloc+0x59/0x70 [ 30.666859] kmem_cache_alloc+0x16b/0x370 [ 30.667364] vm_area_dup+0x20/0x160 [ 30.667820] __split_vma+0x170/0x950 [ 30.668278] split_vma+0xc6/0x110 [ 30.668702] mprotect_fixup+0x8d2/0xb30 [ 30.669199] do_mprotect_pkey+0x87e/0xd40 [ 30.669708] __x64_sys_mprotect+0x78/0xc0 [ 30.670221] do_syscall_64+0x3f/0x90 [ 30.670685] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.671314] [ 30.671524] Freed by task 213: [ 30.671913] kasan_save_stack+0x22/0x50 [ 30.672416] kasan_set_track+0x25/0x30 [ 30.672908] kasan_save_free_info+0x2b/0x50 [ 30.673430] __kasan_slab_free+0x10a/0x190 [ 30.673950] kmem_cache_free+0x10d/0x4d0 [ 30.674451] rcu_core+0x8c8/0x2860 [ 30.674891] __do_softirq+0x1b7/0x7d4 [ 30.675361] [ 30.675580] Last potentially related work creation: [ 30.676153] kasan_save_stack+0x22/0x50 [ 30.676653] __kasan_record_aux_stack+0x8e/0xa0 [ 30.677217] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.677862] remove_vma+0x139/0x170 [ 30.678310] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.678860] do_vmi_munmap+0x1f1/0x2b0 [ 30.679339] __vm_munmap+0x138/0x3a0 [ 30.679820] __x64_sys_munmap+0x59/0x80 [ 30.680314] do_syscall_64+0x3f/0x90 [ 30.680777] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.681407] [ 30.681618] The buggy address belongs to the object at ffff888018087488 [ 30.681618] which belongs to the cache vm_area_struct of size 168 [ 30.683058] The buggy address is located 88 bytes inside of [ 30.683058] freed 168-byte region [ffff888018087488, ffff888018087530) [ 30.684440] [ 30.684650] The buggy address belongs to the physical page: [ 30.685293] page:00000000c9a0356c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18087 [ 30.686359] memcg:ffff88800de29001 [ 30.686776] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.687415] page_type: 0xffffffff() [ 30.687871] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.688771] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de29001 [ 30.689662] page dumped because: kasan: bad access detected [ 30.690315] [ 30.690532] Memory state around the buggy address: [ 30.691106] ffff888018087380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.691977] ffff888018087400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.692822] >ffff888018087480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.693655] ^ [ 30.694393] ffff888018087500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.695233] ffff888018087580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.696082] ================================================================== [ 30.697199] Disabling lock debugging due to kernel taint [ 32.674794] BUG: Bad rss-counter state mm:00000000b88786c3 type:MM_FILEPAGES val:33 [ 32.675747] BUG: Bad rss-counter state mm:00000000b88786c3 type:MM_ANONPAGES val:22 [ 33.133974] BUG: Bad rss-counter state mm:000000007cf0cd1b type:MM_FILEPAGES val:33 [ 33.134910] BUG: Bad rss-counter state mm:000000007cf0cd1b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60753' (ECDSA) to the list of known hosts. 2023/06/21 03:29:00 fuzzer started 2023/06/21 03:29:00 dialing manager at localhost:36067 2023/06/21 03:29:00 checking machine... 2023/06/21 03:29:00 checking revisions... [ 33.846061] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:29:00 testing simple program... [ 33.896395] cgroup: Unknown subsys name 'net' [ 33.958900] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:29:00 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff852ca350 RCX=0000000000000000 RDX=ffff88800d8c8000 RSI=0000000000000000 RDI=0000000000000000 RBP=dffffc0000000000 RSP=ffff88800f46fad8 R8 =0000000000000005 R9 =0000000000000001 R10=0000000000000001 R11=0000000000000000 R12=0000000000000000 R13=0000000000006007 R14=ffff88800f46fe60 R15=ffff88800893f300 RIP=ffffffff814c0404 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 00007fc8350a8900 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=00007fc8344e2f80 CR3=000000000d5ae000 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=4f189b46b328d4bae94c7e7d58bfc3d1 XMM02=eff9b2d0a8fce9cb0000000000119f58 XMM03=2c67c8bc2e329bc3000000000011a080 XMM04=f3bcbafebec9c0fe00000000000ae988 XMM05=1cb4088fcd2766540000000000132428 XMM06=19e9129bd510f23500000000001312c0 XMM07=fb795ef6d657705600000000001214e8 XMM08=2c67c8bc2e329bc3000000000011a080 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00007f1dd5b7da00 RBX=00005603e82c3ed0 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=00007fff7b133200 RBP=0000000000000001 RSP=00007fff7b133200 R8 =00007f1dd5d6ff60 R9 =0000000000000001 R10=0000000000000000 R11=0000000000000206 R12=00007f1dd57bc900 R13=00005603e82c3ed0 R14=0000000000000001 R15=0000000000000000 RIP=00007f1dd5c3221f RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f1dd57bc900 00000000 00000000 GS =0000 0000000000000000 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=00007fff7b12d000 CR3=000000000a070000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000