syzkaller login: [ 134.593101] BUG: Bad rss-counter state mm:00000000376e6e57 type:MM_FILEPAGES val:33 [ 134.594301] BUG: Bad rss-counter state mm:00000000376e6e57 type:MM_ANONPAGES val:22 [ 134.773827] ================================================================== [ 134.774385] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 134.774983] Read of size 8 at addr ffff88800d4b4c20 by task sshd/219 [ 134.775467] [ 134.775605] CPU: 0 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 134.776241] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 134.776860] Call Trace: [ 134.777061] [ 134.777244] dump_stack_lvl+0x91/0xf0 [ 134.777553] print_report+0xcc/0x620 [ 134.777927] ? __virt_addr_valid+0x102/0x340 [ 134.778278] ? vma_interval_tree_remove+0xc75/0xec0 [ 134.778665] ? vma_interval_tree_remove+0xc75/0xec0 [ 134.779048] kasan_report+0xbe/0xf0 [ 134.779352] ? vma_interval_tree_remove+0xc75/0xec0 [ 134.779743] vma_interval_tree_remove+0xc75/0xec0 [ 134.780140] vma_prepare+0xc54/0x11a0 [ 134.780449] __split_vma+0x5af/0x950 [ 134.780748] ? __pfx___split_vma+0x10/0x10 [ 134.781080] ? find_held_lock+0x2c/0x110 [ 134.781418] do_vmi_align_munmap+0x2ba/0x11f0 [ 134.781775] ? lock_is_held_type+0x9f/0x120 [ 134.782113] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 134.782493] ? mtree_range_walk+0x632/0x900 [ 134.782839] ? mas_walk+0x5c7/0x7c0 [ 134.783139] do_vmi_munmap+0x1f1/0x2b0 [ 134.783451] mmap_region+0x1f9/0x2660 [ 134.783752] ? vm_mmap_pgoff+0x15c/0x3a0 [ 134.784075] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 134.784529] ? __pfx_lock_acquire+0x10/0x10 [ 134.784865] ? __pfx_mmap_region+0x10/0x10 [ 134.785198] ? security_mmap_addr+0x7d/0xa0 [ 134.785533] ? get_unmapped_area+0x1f5/0x3f0 [ 134.785881] do_mmap+0x854/0xf00 [ 134.786156] vm_mmap_pgoff+0x1a6/0x3a0 [ 134.786470] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 134.786823] ksys_mmap_pgoff+0x3af/0x500 [ 134.787142] do_syscall_64+0x3f/0x90 [ 134.787445] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 134.787854] RIP: 0033:0x7f0f76d98d82 [ 134.788138] 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 [ 134.789464] RSP: 002b:00007ffe5dd1be08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 134.790023] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0f76d98d82 [ 134.790555] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0f761d2000 [ 134.791085] RBP: 00007f0f761d2000 R08: 0000000000000009 R09: 0000000000001000 [ 134.791612] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c821efbec0 [ 134.792134] R13: 00007ffe5dd1be20 R14: 00007ffe5dd1be50 R15: 00007ffe5dd1c1b0 [ 134.792675] [ 134.792860] [ 134.792996] Allocated by task 212: [ 134.793266] kasan_save_stack+0x22/0x50 [ 134.793586] kasan_set_track+0x25/0x30 [ 134.793900] __kasan_slab_alloc+0x59/0x70 [ 134.794229] kmem_cache_alloc+0x16b/0x370 [ 134.794553] vm_area_dup+0x20/0x160 [ 134.794838] __split_vma+0x170/0x950 [ 134.795133] split_vma+0xc6/0x110 [ 134.795410] mprotect_fixup+0x8d2/0xb30 [ 134.795728] do_mprotect_pkey+0x87e/0xd40 [ 134.796057] __x64_sys_mprotect+0x78/0xc0 [ 134.796458] do_syscall_64+0x3f/0x90 [ 134.796967] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 134.797631] [ 134.797852] Freed by task 212: [ 134.798252] kasan_save_stack+0x22/0x50 [ 134.798772] kasan_set_track+0x25/0x30 [ 134.799278] kasan_save_free_info+0x2b/0x50 [ 134.799827] __kasan_slab_free+0x10a/0x190 [ 134.800414] kmem_cache_free+0x10d/0x4d0 [ 134.800934] rcu_core+0x8c8/0x2860 [ 134.801404] __do_softirq+0x1b7/0x7d4 [ 134.801894] [ 134.802112] Last potentially related work creation: [ 134.802717] kasan_save_stack+0x22/0x50 [ 134.803241] __kasan_record_aux_stack+0x8e/0xa0 [ 134.803837] __call_rcu_common.constprop.0+0x6a/0xb90 [ 134.804509] remove_vma+0x139/0x170 [ 134.804972] do_vmi_align_munmap+0xd4a/0x11f0 [ 134.805549] do_vmi_munmap+0x1f1/0x2b0 [ 134.806048] __vm_munmap+0x138/0x3a0 [ 134.806528] __x64_sys_munmap+0x59/0x80 [ 134.807042] do_syscall_64+0x3f/0x90 [ 134.807531] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 134.808194] [ 134.808424] Second to last potentially related work creation: [ 134.809131] kasan_save_stack+0x22/0x50 [ 134.809650] __kasan_record_aux_stack+0x8e/0xa0 [ 134.810246] __call_rcu_common.constprop.0+0x6a/0xb90 [ 134.810904] remove_vma+0x139/0x170 [ 134.811373] do_vmi_align_munmap+0xd4a/0x11f0 [ 134.811947] do_vmi_munmap+0x1f1/0x2b0 [ 134.812475] mmap_region+0x1f9/0x2660 [ 134.812969] do_mmap+0x854/0xf00 [ 134.813411] vm_mmap_pgoff+0x1a6/0x3a0 [ 134.813912] ksys_mmap_pgoff+0x3af/0x500 [ 134.814425] do_syscall_64+0x3f/0x90 [ 134.814911] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 134.815570] [ 134.815792] The buggy address belongs to the object at ffff88800d4b4bc8 [ 134.815792] which belongs to the cache vm_area_struct of size 168 [ 134.817301] The buggy address is located 88 bytes inside of [ 134.817301] freed 168-byte region [ffff88800d4b4bc8, ffff88800d4b4c70) [ 134.818762] [ 134.818989] The buggy address belongs to the physical page: [ 134.819681] page:00000000bee83b01 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd4b4 [ 134.820797] memcg:ffff888009f1ec01 [ 134.821242] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 134.821980] page_type: 0xffffffff() [ 134.822450] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 134.823402] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009f1ec01 [ 134.824358] page dumped because: kasan: bad access detected [ 134.825045] [ 134.825268] Memory state around the buggy address: [ 134.825868] ffff88800d4b4b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 134.826746] ffff88800d4b4b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 134.827612] >ffff88800d4b4c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 134.828484] ^ [ 134.829032] ffff88800d4b4c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 134.829912] ffff88800d4b4d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 134.830790] ================================================================== [ 134.831789] Disabling lock debugging due to kernel taint [ 136.899836] BUG: Bad rss-counter state mm:00000000e8d94c4b type:MM_FILEPAGES val:33 [ 136.901096] BUG: Bad rss-counter state mm:00000000e8d94c4b type:MM_ANONPAGES val:22 [ 137.322010] BUG: Bad rss-counter state mm:00000000b2e77f8a type:MM_FILEPAGES val:33 [ 137.323232] BUG: Bad rss-counter state mm:00000000b2e77f8a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54899' (ECDSA) to the list of known hosts. 2023/06/19 20:43:32 fuzzer started 2023/06/19 20:43:32 dialing manager at localhost:44161 2023/06/19 20:43:32 checking machine... 2023/06/19 20:43:32 checking revisions... [ 138.052000] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:43:32 testing simple program... [ 138.103287] cgroup: Unknown subsys name 'net' [ 138.148775] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:41:56 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff856528e0 RCX=0000000000000100 RDX=ffff8880147bd1c0 RSI=ffffffff814c83e7 RDI=ffffffff856528e0 RBP=00007f9aa2f7cdad RSP=ffff88806ce09a18 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=00007f9aa2f7cdad R13=0000000000000000 R14=ffff8880147bd1c0 R15=ffff88800cce72e0 RIP=ffffffff8135bcff 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 00007f9aa293a700 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=00007f4a8d574b00 CR3=0000000009730000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a38363231352074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383632 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=0000000000000001 RSI=ffffffff8118d7d9 RDI=ffff888008e57950 RBP=ffff888008e579a8 RSP=ffff888008e578e0 R8 =0000000000000001 R9 =ffff888008e57990 R10=0000000000038001 R11=00000000000b5c92 R12=ffff888008e579b0 R13=ffff888008e57998 R14=ffff888008e57991 R15=ffff888008e57950 RIP=ffffffff811306ec 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 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=0000558c82e2414c CR3=000000000d7cc000 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=6720646572637465733a4d41503d706f 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