syzkaller login: [ 60.667290] BUG: Bad rss-counter state mm:000000002d54d128 type:MM_FILEPAGES val:33 [ 60.668770] BUG: Bad rss-counter state mm:000000002d54d128 type:MM_ANONPAGES val:22 [ 60.831239] ================================================================== [ 60.832333] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.833458] Read of size 8 at addr ffff88800dde4b38 by task sshd/221 [ 60.834552] [ 60.834843] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 60.835850] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.836888] Call Trace: [ 60.837209] [ 60.837512] dump_stack_lvl+0x91/0xf0 [ 60.838013] print_report+0xcc/0x620 [ 60.838501] ? __virt_addr_valid+0x102/0x340 [ 60.839069] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.839697] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.840318] kasan_report+0xbe/0xf0 [ 60.840799] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.841431] vma_interval_tree_remove+0xc75/0xec0 [ 60.842047] vma_prepare+0xc54/0x11a0 [ 60.842531] __split_vma+0x5af/0x950 [ 60.843026] ? __pfx___split_vma+0x10/0x10 [ 60.843560] ? find_held_lock+0x2c/0x110 [ 60.844100] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.844669] ? lock_is_held_type+0x9f/0x120 [ 60.845208] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.845824] ? mtree_range_walk+0x632/0x900 [ 60.846378] ? mas_walk+0x5c7/0x7c0 [ 60.846873] do_vmi_munmap+0x1f1/0x2b0 [ 60.847376] mmap_region+0x1f9/0x2660 [ 60.847867] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.848383] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.849108] ? __pfx_lock_acquire+0x10/0x10 [ 60.849651] ? __pfx_mmap_region+0x10/0x10 [ 60.850201] ? security_mmap_addr+0x7d/0xa0 [ 60.850752] ? get_unmapped_area+0x1f5/0x3f0 [ 60.851306] do_mmap+0x854/0xf00 [ 60.851747] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.852244] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.852817] ksys_mmap_pgoff+0x3af/0x500 [ 60.853327] do_syscall_64+0x3f/0x90 [ 60.853802] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.854459] RIP: 0033:0x7f0716a64d82 [ 60.854947] 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 [ 60.857104] RSP: 002b:00007ffeda1a68f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.858012] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0716a64d82 [ 60.858882] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0715e9e000 [ 60.859747] RBP: 00007f0715e9e000 R08: 0000000000000009 R09: 0000000000001000 [ 60.860629] R10: 0000000000000812 R11: 0000000000000206 R12: 00005610e8522ec0 [ 60.861520] R13: 00007ffeda1a6910 R14: 00007ffeda1a6940 R15: 00007ffeda1a6ca0 [ 60.862421] [ 60.862731] [ 60.862959] Allocated by task 214: [ 60.863445] kasan_save_stack+0x22/0x50 [ 60.863975] kasan_set_track+0x25/0x30 [ 60.864493] __kasan_slab_alloc+0x59/0x70 [ 60.865039] kmem_cache_alloc+0x16b/0x370 [ 60.865578] vm_area_dup+0x20/0x160 [ 60.866056] __split_vma+0x170/0x950 [ 60.866543] split_vma+0xc6/0x110 [ 60.867033] mprotect_fixup+0x8d2/0xb30 [ 60.867546] do_mprotect_pkey+0x87e/0xd40 [ 60.868070] __x64_sys_mprotect+0x78/0xc0 [ 60.868595] do_syscall_64+0x3f/0x90 [ 60.869075] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.869730] [ 60.869952] Freed by task 214: [ 60.870356] kasan_save_stack+0x22/0x50 [ 60.870887] kasan_set_track+0x25/0x30 [ 60.871379] kasan_save_free_info+0x2b/0x50 [ 60.871913] __kasan_slab_free+0x10a/0x190 [ 60.872459] kmem_cache_free+0x10d/0x4d0 [ 60.872976] rcu_core+0x8c8/0x2860 [ 60.873423] __do_softirq+0x1b7/0x7d4 [ 60.873900] [ 60.874118] Last potentially related work creation: [ 60.874724] kasan_save_stack+0x22/0x50 [ 60.875342] __kasan_record_aux_stack+0x8e/0xa0 [ 60.875952] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.876606] remove_vma+0x139/0x170 [ 60.877079] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.877645] do_vmi_munmap+0x1f1/0x2b0 [ 60.878153] __vm_munmap+0x138/0x3a0 [ 60.878648] __x64_sys_munmap+0x59/0x80 [ 60.879174] do_syscall_64+0x3f/0x90 [ 60.879657] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.880309] [ 60.880524] The buggy address belongs to the object at ffff88800dde4ae0 [ 60.880524] which belongs to the cache vm_area_struct of size 168 [ 60.882040] The buggy address is located 88 bytes inside of [ 60.882040] freed 168-byte region [ffff88800dde4ae0, ffff88800dde4b88) [ 60.883488] [ 60.883705] The buggy address belongs to the physical page: [ 60.884375] page:000000003aa1ce37 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdde4 [ 60.885452] memcg:ffff888014484301 [ 60.885882] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.886525] page_type: 0xffffffff() [ 60.887005] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 60.887931] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014484301 [ 60.888857] page dumped because: kasan: bad access detected [ 60.889528] [ 60.889746] Memory state around the buggy address: [ 60.890348] ffff88800dde4a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 60.891254] ffff88800dde4a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 60.892183] >ffff88800dde4b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.893099] ^ [ 60.893741] ffff88800dde4b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 60.894664] ffff88800dde4c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 60.895579] ================================================================== [ 60.896577] Disabling lock debugging due to kernel taint [ 64.115529] BUG: Bad rss-counter state mm:00000000cdfa5144 type:MM_FILEPAGES val:33 [ 64.116667] BUG: Bad rss-counter state mm:00000000cdfa5144 type:MM_ANONPAGES val:22 [ 64.586589] BUG: Bad rss-counter state mm:00000000e739894a type:MM_FILEPAGES val:33 [ 64.587810] BUG: Bad rss-counter state mm:00000000e739894a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54200' (ECDSA) to the list of known hosts. 2023/06/19 20:38:18 fuzzer started 2023/06/19 20:38:18 dialing manager at localhost:44161 2023/06/19 20:38:18 checking machine... 2023/06/19 20:38:18 checking revisions... [ 65.247252] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:38:18 testing simple program... [ 65.315301] cgroup: Unknown subsys name 'net' [ 65.397854] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:38:17 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000053 RCX=0000000000000000 RDX=ffff8880147a0000 RSI=ffffffff8184ce37 RDI=0000000000000006 RBP=ffff88800f6b1853 RSP=ffff88801479f8c8 R8 =0000000000000006 R9 =ffff88800f6b1800 R10=ffff88808f6b1800 R11=00000000000b6996 R12=ffff88800f6b1800 R13=0000000000000000 R14=ffff88808f6b1800 R15=0000777f80000000 RIP=ffffffff814c081b 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 00007f2bf2207900 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=00007faf4c796650 CR3=000000000ca80000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=dde78130782d6c2a00000000000ae988 XMM05=a6ae86d4e3b0aea80000000000135340 XMM06=c291bd5c70af25b90000000000134130 XMM07=fb795ef6d657705600000000001246a8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=1ffff11001daee8b RCX=ffffffff812d8ec3 RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000000 RSP=ffff88800ed77440 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8180fd28 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 00007fc48c2dd700 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=00007faf4c7990b0 CR3=000000000d7d8000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3033325b646873732037313a3833 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363832 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000