syzkaller login: [ 30.486751] BUG: Bad rss-counter state mm:0000000014a95fdd type:MM_FILEPAGES val:33 [ 30.488204] BUG: Bad rss-counter state mm:0000000014a95fdd type:MM_ANONPAGES val:22 [ 30.641932] ================================================================== [ 30.642842] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.643775] Read of size 8 at addr ffff88800c5e5310 by task sshd/221 [ 30.644564] [ 30.644801] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.645978] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.646948] Call Trace: [ 30.647261] [ 30.647543] dump_stack_lvl+0x91/0xf0 [ 30.648052] print_report+0xcc/0x620 [ 30.648573] ? __virt_addr_valid+0x102/0x340 [ 30.649126] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.649749] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.650368] kasan_report+0xbe/0xf0 [ 30.650867] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.651488] vma_interval_tree_remove+0xc75/0xec0 [ 30.652106] vma_prepare+0xc54/0x11a0 [ 30.652592] __split_vma+0x5af/0x950 [ 30.653073] ? __pfx___split_vma+0x10/0x10 [ 30.653601] ? find_held_lock+0x2c/0x110 [ 30.654134] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.654712] ? lock_is_held_type+0x9f/0x120 [ 30.655247] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.655862] ? mtree_range_walk+0x632/0x900 [ 30.656440] ? mas_walk+0x5c7/0x7c0 [ 30.656927] do_vmi_munmap+0x1f1/0x2b0 [ 30.657413] mmap_region+0x1f9/0x2660 [ 30.657914] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.658421] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.659141] ? __pfx_lock_acquire+0x10/0x10 [ 30.659680] ? __pfx_mmap_region+0x10/0x10 [ 30.660203] ? security_mmap_addr+0x7d/0xa0 [ 30.660761] ? get_unmapped_area+0x1f5/0x3f0 [ 30.661304] do_mmap+0x854/0xf00 [ 30.661755] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.662244] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.662813] ksys_mmap_pgoff+0x3af/0x500 [ 30.663317] do_syscall_64+0x3f/0x90 [ 30.663809] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.664459] RIP: 0033:0x7f28936eed82 [ 30.664925] 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 [ 30.667055] RSP: 002b:00007fffe2cdee28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.667968] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f28936eed82 [ 30.668841] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2892b28000 [ 30.669684] RBP: 00007f2892b28000 R08: 0000000000000009 R09: 0000000000001000 [ 30.670527] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559b42d44ec0 [ 30.671395] R13: 00007fffe2cdee40 R14: 00007fffe2cdee70 R15: 00007fffe2cdf1d0 [ 30.672276] [ 30.672583] [ 30.672818] Allocated by task 214: [ 30.673241] kasan_save_stack+0x22/0x50 [ 30.673762] kasan_set_track+0x25/0x30 [ 30.674265] __kasan_slab_alloc+0x59/0x70 [ 30.674822] kmem_cache_alloc+0x16b/0x370 [ 30.675343] vm_area_dup+0x20/0x160 [ 30.675824] __split_vma+0x170/0x950 [ 30.676289] split_vma+0xc6/0x110 [ 30.676766] mprotect_fixup+0x8d2/0xb30 [ 30.677262] do_mprotect_pkey+0x87e/0xd40 [ 30.677789] __x64_sys_mprotect+0x78/0xc0 [ 30.678317] do_syscall_64+0x3f/0x90 [ 30.678802] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.679444] [ 30.679670] Freed by task 204: [ 30.680066] kasan_save_stack+0x22/0x50 [ 30.680572] kasan_set_track+0x25/0x30 [ 30.681070] kasan_save_free_info+0x2b/0x50 [ 30.681603] __kasan_slab_free+0x10a/0x190 [ 30.682152] kmem_cache_free+0x10d/0x4d0 [ 30.682671] rcu_core+0x8c8/0x2860 [ 30.683115] __do_softirq+0x1b7/0x7d4 [ 30.683586] [ 30.683822] Last potentially related work creation: [ 30.684412] kasan_save_stack+0x22/0x50 [ 30.684923] __kasan_record_aux_stack+0x8e/0xa0 [ 30.685494] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.686413] remove_vma+0x139/0x170 [ 30.686973] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.687674] do_vmi_munmap+0x1f1/0x2b0 [ 30.688280] __vm_munmap+0x138/0x3a0 [ 30.688816] __x64_sys_munmap+0x59/0x80 [ 30.689345] do_syscall_64+0x3f/0x90 [ 30.689872] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.690551] [ 30.690768] Second to last potentially related work creation: [ 30.691459] kasan_save_stack+0x22/0x50 [ 30.691986] __kasan_record_aux_stack+0x8e/0xa0 [ 30.692602] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.693260] remove_vma+0x139/0x170 [ 30.693757] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.694358] do_vmi_munmap+0x1f1/0x2b0 [ 30.694893] mmap_region+0x1f9/0x2660 [ 30.695397] do_mmap+0x854/0xf00 [ 30.695831] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.696337] ksys_mmap_pgoff+0x3af/0x500 [ 30.696834] do_syscall_64+0x3f/0x90 [ 30.697320] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.698163] [ 30.698450] The buggy address belongs to the object at ffff88800c5e52b8 [ 30.698450] which belongs to the cache vm_area_struct of size 168 [ 30.700400] The buggy address is located 88 bytes inside of [ 30.700400] freed 168-byte region [ffff88800c5e52b8, ffff88800c5e5360) [ 30.702018] [ 30.702253] The buggy address belongs to the physical page: [ 30.702921] page:00000000e5cdc26d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc5e5 [ 30.704007] memcg:ffff888009a29001 [ 30.704453] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.705115] page_type: 0xffffffff() [ 30.705578] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.706515] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009a29001 [ 30.707433] page dumped because: kasan: bad access detected [ 30.708084] [ 30.708320] Memory state around the buggy address: [ 30.708899] ffff88800c5e5200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.709774] ffff88800c5e5280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.710653] >ffff88800c5e5300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.711521] ^ [ 30.711982] ffff88800c5e5380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.713032] ffff88800c5e5400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.713886] ================================================================== [ 30.714814] Disabling lock debugging due to kernel taint [ 33.397208] BUG: Bad rss-counter state mm:000000005421bee9 type:MM_FILEPAGES val:33 [ 33.398374] BUG: Bad rss-counter state mm:000000005421bee9 type:MM_ANONPAGES val:22 [ 33.842225] BUG: Bad rss-counter state mm:00000000d59d5827 type:MM_FILEPAGES val:33 [ 33.843083] BUG: Bad rss-counter state mm:00000000d59d5827 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60209' (ECDSA) to the list of known hosts. 2023/06/21 06:19:36 fuzzer started 2023/06/21 06:19:37 dialing manager at localhost:36067 2023/06/21 06:19:37 checking machine... 2023/06/21 06:19:37 checking revisions... [ 34.616383] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:19:37 testing simple program... [ 34.660188] cgroup: Unknown subsys name 'net' [ 34.697030] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:19:36 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880146af928 RCX=ffffffff844f7db4 RDX=ffff88800ffd3680 RSI=0000000000000000 RDI=0000000000000007 RBP=0000000000000003 RSP=ffff8880146af888 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000003 R11=00000000000b6d53 R12=0000000000000003 R13=ffff8880146af940 R14=ffff888014524000 R15=0000000000000000 RIP=ffffffff814c027c 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fa2ec306900 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=00007fa2eb72c910 CR3=000000000d7e2000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=9479bc988ec87d3500000000000ae988 XMM05=9a2dcc168ecda78b0000000000133bd8 XMM06=c291bd5c70af25b90000000000132c78 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000559762172028 RCX=00000003ffffffff RDX=0000000000000001 RSI=0000000000000000 RDI=000055976218cec0 RBP=00007ffe9c70e860 RSP=00007ffe9c70e850 R8 =000055976218cec0 R9 =00007ffe9c70e760 R10=000000000000002c R11=0000000000000202 R12=0000000000000000 R13=0000000000000000 R14=00007ffe9c70ede0 R15=00007ffe9c70eb90 RIP=00007f1e664958f2 RFL=00000246 [---Z-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 00007f1e6590a900 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=000055976216ff40 CR3=000000001872c000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000