syzkaller login: [ 37.081559] BUG: Bad rss-counter state mm:000000007172923d type:MM_FILEPAGES val:33 [ 37.083024] BUG: Bad rss-counter state mm:000000007172923d type:MM_ANONPAGES val:22 [ 37.263188] ================================================================== [ 37.264120] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.265068] Read of size 8 at addr ffff88800e6416b0 by task sshd/219 [ 37.265842] [ 37.266058] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.267084] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.268079] Call Trace: [ 37.268400] [ 37.268689] dump_stack_lvl+0x91/0xf0 [ 37.269181] print_report+0xcc/0x620 [ 37.269692] ? __virt_addr_valid+0x102/0x340 [ 37.270263] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.270890] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.271502] kasan_report+0xbe/0xf0 [ 37.271987] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.272622] vma_interval_tree_remove+0xc75/0xec0 [ 37.273230] vma_prepare+0xc54/0x11a0 [ 37.273715] __split_vma+0x5af/0x950 [ 37.274188] ? __pfx___split_vma+0x10/0x10 [ 37.274725] ? find_held_lock+0x2c/0x110 [ 37.275247] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.275818] ? lock_is_held_type+0x9f/0x120 [ 37.276380] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.276993] ? mtree_range_walk+0x632/0x900 [ 37.277553] ? mas_walk+0x5c7/0x7c0 [ 37.278029] do_vmi_munmap+0x1f1/0x2b0 [ 37.278523] mmap_region+0x1f9/0x2660 [ 37.279004] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.279520] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.280245] ? __pfx_lock_acquire+0x10/0x10 [ 37.280790] ? __pfx_mmap_region+0x10/0x10 [ 37.281324] ? security_mmap_addr+0x7d/0xa0 [ 37.281866] ? get_unmapped_area+0x1f5/0x3f0 [ 37.282426] do_mmap+0x854/0xf00 [ 37.282873] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.283378] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.283957] ksys_mmap_pgoff+0x3af/0x500 [ 37.284493] do_syscall_64+0x3f/0x90 [ 37.284977] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.285639] RIP: 0033:0x7f5d5f7c4d82 [ 37.286114] 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 [ 37.288320] RSP: 002b:00007ffd9cc98c58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.289241] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5d5f7c4d82 [ 37.290097] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5d5ebfe000 [ 37.290945] RBP: 00007f5d5ebfe000 R08: 0000000000000009 R09: 0000000000001000 [ 37.291796] R10: 0000000000000812 R11: 0000000000000206 R12: 00005612aae1eb20 [ 37.292662] R13: 00007ffd9cc98c70 R14: 00007ffd9cc98ca0 R15: 00007ffd9cc99000 [ 37.293533] [ 37.293825] [ 37.294039] Allocated by task 212: [ 37.294469] kasan_save_stack+0x22/0x50 [ 37.294974] kasan_set_track+0x25/0x30 [ 37.295465] __kasan_slab_alloc+0x59/0x70 [ 37.296018] kmem_cache_alloc+0x16b/0x370 [ 37.296547] vm_area_dup+0x20/0x160 [ 37.297002] __split_vma+0x170/0x950 [ 37.297469] split_vma+0xc6/0x110 [ 37.297910] mprotect_fixup+0x8d2/0xb30 [ 37.298419] do_mprotect_pkey+0x87e/0xd40 [ 37.298944] __x64_sys_mprotect+0x78/0xc0 [ 37.299473] do_syscall_64+0x3f/0x90 [ 37.299948] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.300614] [ 37.300830] Freed by task 212: [ 37.301223] kasan_save_stack+0x22/0x50 [ 37.301736] kasan_set_track+0x25/0x30 [ 37.302231] kasan_save_free_info+0x2b/0x50 [ 37.302771] __kasan_slab_free+0x10a/0x190 [ 37.303311] kmem_cache_free+0x10d/0x4d0 [ 37.303825] rcu_core+0x8c8/0x2860 [ 37.304279] __do_softirq+0x1b7/0x7d4 [ 37.304760] [ 37.304979] Last potentially related work creation: [ 37.305569] kasan_save_stack+0x22/0x50 [ 37.306076] __kasan_record_aux_stack+0x8e/0xa0 [ 37.306654] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.307300] remove_vma+0x139/0x170 [ 37.307758] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.308540] do_vmi_munmap+0x1f1/0x2b0 [ 37.309160] __vm_munmap+0x138/0x3a0 [ 37.309749] __x64_sys_munmap+0x59/0x80 [ 37.310365] do_syscall_64+0x3f/0x90 [ 37.310955] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.311756] [ 37.312043] The buggy address belongs to the object at ffff88800e641658 [ 37.312043] which belongs to the cache vm_area_struct of size 168 [ 37.313920] The buggy address is located 88 bytes inside of [ 37.313920] freed 168-byte region [ffff88800e641658, ffff88800e641700) [ 37.315707] [ 37.316002] The buggy address belongs to the physical page: [ 37.316710] page:000000002a7b31e5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe641 [ 37.317802] memcg:ffff888016233f01 [ 37.318238] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.318890] page_type: 0xffffffff() [ 37.319343] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 37.320277] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016233f01 [ 37.321197] page dumped because: kasan: bad access detected [ 37.321862] [ 37.322080] Memory state around the buggy address: [ 37.322687] ffff88800e641580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.323554] ffff88800e641600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 37.324425] >ffff88800e641680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.325285] ^ [ 37.325874] ffff88800e641700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 37.326739] ffff88800e641780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 37.327600] ================================================================== [ 37.328549] Disabling lock debugging due to kernel taint [ 39.643562] BUG: Bad rss-counter state mm:000000001b746e32 type:MM_FILEPAGES val:33 [ 39.644571] BUG: Bad rss-counter state mm:000000001b746e32 type:MM_ANONPAGES val:22 [ 40.095741] BUG: Bad rss-counter state mm:00000000660a9c71 type:MM_FILEPAGES val:33 [ 40.096829] BUG: Bad rss-counter state mm:00000000660a9c71 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64726' (ECDSA) to the list of known hosts. 2023/06/19 18:26:23 fuzzer started 2023/06/19 18:26:24 dialing manager at localhost:44161 2023/06/19 18:26:24 checking machine... 2023/06/19 18:26:24 checking revisions... [ 40.789942] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:26:24 testing simple program... [ 40.840188] cgroup: Unknown subsys name 'net' [ 40.881910] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:26:18 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888008d7fbd0 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff856d8238 RBP=0000000000000001 RSP=ffff888008d7fbc0 R8 =0000000000000001 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=0000000000000128 R12=0000000000000000 R13=0000000000000000 R14=ffffffff856d8238 R15=0000000000000000 RIP=ffffffff812d8e47 RFL=00000086 [--S--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 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=00007fa5ca9b8eb0 CR3=000000000ea4c000 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=2033323a36323a3831203931206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033323a36323a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff860d68fb RBX=0000000000000001 RCX=ffffffff860d68f6 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88800f5a79d0 RSP=ffff88800f5a7908 R8 =ffffffff860d68fa R9 =ffff88800f5a79b8 R10=0000000000038001 R11=0000000000010b7e R12=ffff88800f5a79d8 R13=ffff88800f5a79c0 R14=ffff88800f5a79b9 R15=ffff88800f5a7978 RIP=ffffffff81130ab5 RFL=00000293 [--S-A-C] 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 00007f550693b900 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=00007ffe1cae1000 CR3=0000000016348000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=0000006f730074696d7265705f6d6170 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000