syzkaller login: [ 55.422392] BUG: Bad rss-counter state mm:00000000855f380b type:MM_FILEPAGES val:33 [ 55.424467] BUG: Bad rss-counter state mm:00000000855f380b type:MM_ANONPAGES val:22 [ 55.584762] ================================================================== [ 55.585876] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 55.587162] Read of size 8 at addr ffff888019ff0c20 by task sshd/219 [ 55.588147] [ 55.588420] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 55.589506] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 55.590731] Call Trace: [ 55.591132] [ 55.591428] dump_stack_lvl+0x91/0xf0 [ 55.591929] print_report+0xcc/0x620 [ 55.592454] ? __virt_addr_valid+0x102/0x340 [ 55.593019] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.593662] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.594299] kasan_report+0xbe/0xf0 [ 55.594796] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.595423] vma_interval_tree_remove+0xc75/0xec0 [ 55.596029] vma_prepare+0xc54/0x11a0 [ 55.596509] __split_vma+0x5af/0x950 [ 55.596977] ? __pfx___split_vma+0x10/0x10 [ 55.597522] ? find_held_lock+0x2c/0x110 [ 55.598060] do_vmi_align_munmap+0x2ba/0x11f0 [ 55.598657] ? lock_is_held_type+0x9f/0x120 [ 55.599218] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 55.599845] ? mtree_range_walk+0x632/0x900 [ 55.600407] ? mas_walk+0x5c7/0x7c0 [ 55.600897] do_vmi_munmap+0x1f1/0x2b0 [ 55.601405] mmap_region+0x1f9/0x2660 [ 55.601902] ? vm_mmap_pgoff+0x15c/0x3a0 [ 55.602423] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 55.603167] ? __pfx_lock_acquire+0x10/0x10 [ 55.603702] ? __pfx_mmap_region+0x10/0x10 [ 55.604236] ? security_mmap_addr+0x7d/0xa0 [ 55.604773] ? get_unmapped_area+0x1f5/0x3f0 [ 55.605320] do_mmap+0x854/0xf00 [ 55.605769] vm_mmap_pgoff+0x1a6/0x3a0 [ 55.606288] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 55.606882] ksys_mmap_pgoff+0x3af/0x500 [ 55.607411] do_syscall_64+0x3f/0x90 [ 55.607906] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.608577] RIP: 0033:0x7fc4aac5cd82 [ 55.609040] 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 [ 55.611234] RSP: 002b:00007fffb57074b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 55.612143] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc4aac5cd82 [ 55.613007] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc4aa096000 [ 55.613857] RBP: 00007fc4aa096000 R08: 0000000000000009 R09: 0000000000001000 [ 55.614769] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c0a0f11ec0 [ 55.615613] R13: 00007fffb57074d0 R14: 00007fffb5707500 R15: 00007fffb5707860 [ 55.616469] [ 55.616763] [ 55.616975] Allocated by task 212: [ 55.617407] kasan_save_stack+0x22/0x50 [ 55.617923] kasan_set_track+0x25/0x30 [ 55.618415] __kasan_slab_alloc+0x59/0x70 [ 55.618948] kmem_cache_alloc+0x16b/0x370 [ 55.619468] vm_area_dup+0x20/0x160 [ 55.619926] __split_vma+0x170/0x950 [ 55.620407] split_vma+0xc6/0x110 [ 55.620868] mprotect_fixup+0x8d2/0xb30 [ 55.621395] do_mprotect_pkey+0x87e/0xd40 [ 55.621916] __x64_sys_mprotect+0x78/0xc0 [ 55.622439] do_syscall_64+0x3f/0x90 [ 55.622937] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.623579] [ 55.623840] Freed by task 212: [ 55.624319] kasan_save_stack+0x22/0x50 [ 55.624890] kasan_set_track+0x25/0x30 [ 55.625402] kasan_save_free_info+0x2b/0x50 [ 55.625944] __kasan_slab_free+0x10a/0x190 [ 55.626522] kmem_cache_free+0x10d/0x4d0 [ 55.627026] rcu_core+0x8c8/0x2860 [ 55.627473] __do_softirq+0x1b7/0x7d4 [ 55.627945] [ 55.628158] Last potentially related work creation: [ 55.628749] kasan_save_stack+0x22/0x50 [ 55.629252] __kasan_record_aux_stack+0x8e/0xa0 [ 55.629830] __call_rcu_common.constprop.0+0x6a/0xb90 [ 55.630492] remove_vma+0x139/0x170 [ 55.630944] do_vmi_align_munmap+0xd4a/0x11f0 [ 55.631502] do_vmi_munmap+0x1f1/0x2b0 [ 55.632081] __vm_munmap+0x138/0x3a0 [ 55.632561] __x64_sys_munmap+0x59/0x80 [ 55.633064] do_syscall_64+0x3f/0x90 [ 55.633542] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.634177] [ 55.634401] The buggy address belongs to the object at ffff888019ff0bc8 [ 55.634401] which belongs to the cache vm_area_struct of size 168 [ 55.635883] The buggy address is located 88 bytes inside of [ 55.635883] freed 168-byte region [ffff888019ff0bc8, ffff888019ff0c70) [ 55.637259] [ 55.637475] The buggy address belongs to the physical page: [ 55.638127] page:000000003f01606b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19ff0 [ 55.639221] memcg:ffff888016ef5601 [ 55.639646] flags: 0x100000000000200(slab|node=0|zone=1) [ 55.640290] page_type: 0xffffffff() [ 55.640742] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 55.641644] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016ef5601 [ 55.642555] page dumped because: kasan: bad access detected [ 55.643214] [ 55.643426] Memory state around the buggy address: [ 55.644004] ffff888019ff0b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 55.644853] ffff888019ff0b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 55.645707] >ffff888019ff0c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 55.646571] ^ [ 55.647101] ffff888019ff0c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 55.647949] ffff888019ff0d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 55.648787] ================================================================== [ 55.649719] Disabling lock debugging due to kernel taint [ 58.198588] BUG: Bad rss-counter state mm:0000000047a600fc type:MM_FILEPAGES val:33 [ 58.199574] BUG: Bad rss-counter state mm:0000000047a600fc type:MM_ANONPAGES val:22 [ 58.742792] BUG: Bad rss-counter state mm:000000003013fa00 type:MM_FILEPAGES val:33 [ 58.744520] BUG: Bad rss-counter state mm:000000003013fa00 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30623' (ECDSA) to the list of known hosts. 2023/06/19 12:32:50 fuzzer started 2023/06/19 12:32:51 dialing manager at localhost:44161 2023/06/19 12:32:51 checking machine... 2023/06/19 12:32:51 checking revisions... [ 59.573125] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:32:51 testing simple program... [ 59.629535] cgroup: Unknown subsys name 'net' [ 59.673693] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:32:26 Registers: info registers vcpu 0 RAX=ffff88800e5feab0 RBX=ffff88800e5feab0 RCX=00000000000d000c RDX=00000000800d000c RSI=ffff88800e5feab0 RDI=ffff88800844e900 RBP=ffff8880143375f0 RSP=ffff888014337560 R8 =00000000000d000c R9 =ffffed1002866e9a R10=0000000000000003 R11=00000000000d000c R12=ffff88800844f780 R13=ffff88800844e900 R14=ffffea0000397f80 R15=00000000800d000c RIP=ffffffff81805cbb RFL=00000042 [---Z---] 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 00007fa224aac900 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=00007fa223effed0 CR3=000000000d858000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=6759de11d8781d7500000000000ae988 XMM05=b46780583972d1bb0000000000134340 XMM06=35a9705be6d8fdf500000000001333e8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000004 RBX=ffff88806cf3a2c0 RCX=ffffffff81370c98 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff88806cf3a2c0 RBP=0000000000000200 RSP=ffff888008e57ca8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000128 R12=ffff88806cf35000 R13=ffff88806cf3a3a8 R14=ffff88806cf3a2c0 R15=0000000000000000 RIP=ffffffff8450bdc4 RFL=00000002 [-------] 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 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=00007ffda6fd6000 CR3=000000001a2fa000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000