syzkaller login: [ 30.692005] BUG: Bad rss-counter state mm:00000000fe8b7495 type:MM_FILEPAGES val:33 [ 30.693167] BUG: Bad rss-counter state mm:00000000fe8b7495 type:MM_ANONPAGES val:22 [ 30.884224] ================================================================== [ 30.885236] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.886395] Read of size 8 at addr ffff88800e63d968 by task sshd/220 [ 30.887268] [ 30.887512] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.888495] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.889589] Call Trace: [ 30.889966] [ 30.890282] dump_stack_lvl+0x91/0xf0 [ 30.890850] print_report+0xcc/0x620 [ 30.891386] ? __virt_addr_valid+0x102/0x340 [ 30.892005] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.892699] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.893371] kasan_report+0xbe/0xf0 [ 30.893918] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.894613] vma_interval_tree_remove+0xc75/0xec0 [ 30.895305] vma_prepare+0xc54/0x11a0 [ 30.895848] __split_vma+0x5af/0x950 [ 30.896369] ? __pfx___split_vma+0x10/0x10 [ 30.896968] ? find_held_lock+0x2c/0x110 [ 30.897545] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.898202] ? lock_is_held_type+0x9f/0x120 [ 30.898816] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.899484] ? mtree_range_walk+0x632/0x900 [ 30.900112] ? mas_walk+0x5c7/0x7c0 [ 30.900633] do_vmi_munmap+0x1f1/0x2b0 [ 30.901177] mmap_region+0x1f9/0x2660 [ 30.901722] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.902290] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.903086] ? __pfx_lock_acquire+0x10/0x10 [ 30.903678] ? __pfx_mmap_region+0x10/0x10 [ 30.904260] ? security_mmap_addr+0x7d/0xa0 [ 30.904853] ? get_unmapped_area+0x1f5/0x3f0 [ 30.905448] do_mmap+0x854/0xf00 [ 30.905972] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.906512] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.907150] ksys_mmap_pgoff+0x3af/0x500 [ 30.907717] do_syscall_64+0x3f/0x90 [ 30.908244] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.908962] RIP: 0033:0x7fa63dfa5d82 [ 30.909458] 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 [ 30.911834] RSP: 002b:00007ffee069dd98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.912832] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa63dfa5d82 [ 30.913775] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa63d3df000 [ 30.914744] RBP: 00007fa63d3df000 R08: 0000000000000009 R09: 0000000000001000 [ 30.915684] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560681fc8980 [ 30.916604] R13: 00007ffee069ddb0 R14: 00007ffee069dde0 R15: 00007ffee069e140 [ 30.917543] [ 30.917886] [ 30.918144] Allocated by task 213: [ 30.918613] kasan_save_stack+0x22/0x50 [ 30.919192] kasan_set_track+0x25/0x30 [ 30.919751] __kasan_slab_alloc+0x59/0x70 [ 30.920319] kmem_cache_alloc+0x16b/0x370 [ 30.920885] vm_area_dup+0x20/0x160 [ 30.921389] __split_vma+0x170/0x950 [ 30.921921] split_vma+0xc6/0x110 [ 30.922427] mprotect_fixup+0x8d2/0xb30 [ 30.923021] do_mprotect_pkey+0x87e/0xd40 [ 30.923608] __x64_sys_mprotect+0x78/0xc0 [ 30.924196] do_syscall_64+0x3f/0x90 [ 30.924745] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.925472] [ 30.925729] Freed by task 19: [ 30.926163] kasan_save_stack+0x22/0x50 [ 30.926730] kasan_set_track+0x25/0x30 [ 30.927262] kasan_save_free_info+0x2b/0x50 [ 30.927851] __kasan_slab_free+0x10a/0x190 [ 30.928435] kmem_cache_free+0x10d/0x4d0 [ 30.928997] rcu_core+0x8c8/0x2860 [ 30.929478] __do_softirq+0x1b7/0x7d4 [ 30.930042] [ 30.930278] Last potentially related work creation: [ 30.930940] kasan_save_stack+0x22/0x50 [ 30.931489] __kasan_record_aux_stack+0x8e/0xa0 [ 30.932121] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.932825] remove_vma+0x139/0x170 [ 30.933309] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.933929] do_vmi_munmap+0x1f1/0x2b0 [ 30.934487] __vm_munmap+0x138/0x3a0 [ 30.935037] __x64_sys_munmap+0x59/0x80 [ 30.935594] do_syscall_64+0x3f/0x90 [ 30.936135] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.936867] [ 30.937106] The buggy address belongs to the object at ffff88800e63d910 [ 30.937106] which belongs to the cache vm_area_struct of size 168 [ 30.938811] The buggy address is located 88 bytes inside of [ 30.938811] freed 168-byte region [ffff88800e63d910, ffff88800e63d9b8) [ 30.940389] [ 30.940632] The buggy address belongs to the physical page: [ 30.941368] page:00000000a9f9229b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe63d [ 30.942598] memcg:ffff88800e951001 [ 30.943085] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.943813] page_type: 0xffffffff() [ 30.944313] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.945334] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e951001 [ 30.946368] page dumped because: kasan: bad access detected [ 30.947134] [ 30.947374] Memory state around the buggy address: [ 30.948027] ffff88800e63d800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.948987] ffff88800e63d880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.949971] >ffff88800e63d900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.950942] ^ [ 30.951824] ffff88800e63d980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.952785] ffff88800e63da00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.953739] ================================================================== [ 30.955011] Disabling lock debugging due to kernel taint [ 33.144494] BUG: Bad rss-counter state mm:00000000cea506e0 type:MM_FILEPAGES val:33 [ 33.145534] BUG: Bad rss-counter state mm:00000000cea506e0 type:MM_ANONPAGES val:22 [ 33.548742] BUG: Bad rss-counter state mm:00000000f9cd5a3d type:MM_FILEPAGES val:33 [ 33.549742] BUG: Bad rss-counter state mm:00000000f9cd5a3d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9045' (ECDSA) to the list of known hosts. 2023/06/20 22:20:44 fuzzer started 2023/06/20 22:20:44 dialing manager at localhost:36067 2023/06/20 22:20:44 checking machine... 2023/06/20 22:20:44 checking revisions... [ 34.283735] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:20:44 testing simple program... [ 34.345317] cgroup: Unknown subsys name 'net' [ 34.394084] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:20:44 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=ffff888008c04000 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=00007faded3e1a90 CR3=000000000c44e000 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=7472bc8911398985264522bf557c8d33 XMM02=000000000011a6a0d59e07bde36eea69 XMM03=000000000011a7c8ec2efd57dc4c00df XMM04=9f9a32e1b42092fb00000000000ae988 XMM05=7618f079be96bfa60000000000132ff0 XMM06=4fda316b135da52b0000000000131de0 XMM07=fb795ef6d65770560000000000122070 XMM08=2c67c8bc2e329bc3000000000011a7c8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=1ffff11003944e53 RCX=0000000000000002 RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff88801ca27280 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8180fea0 RFL=00000256 [---ZAP-] 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 00007f1d9b27e900 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=00007ffcb9e6d000 CR3=00000000142f6000 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