[ 24.549447] BUG: Bad rss-counter state mm:00000000a65ccbda type:MM_FILEPAGES val:33 [ 24.550252] BUG: Bad rss-counter state mm:00000000a65ccbda type:MM_ANONPAGES val:22 [ 24.663145] ================================================================== [ 24.663859] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.664604] Read of size 8 at addr ffff88800d833798 by task sshd/220 [ 24.665199] [ 24.665366] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.666026] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.666861] Call Trace: [ 24.667160] [ 24.667379] dump_stack_lvl+0x91/0xf0 [ 24.667761] print_report+0xcc/0x620 [ 24.668145] ? __virt_addr_valid+0x102/0x340 [ 24.668574] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.669046] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.669522] kasan_report+0xbe/0xf0 [ 24.669888] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.670376] vma_interval_tree_remove+0xc75/0xec0 [ 24.670838] vma_prepare+0xc54/0x11a0 [ 24.671208] __split_vma+0x5af/0x950 [ 24.671574] ? __pfx___split_vma+0x10/0x10 [ 24.671992] ? find_held_lock+0x2c/0x110 [ 24.672353] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.672697] ? lock_is_held_type+0x9f/0x120 [ 24.673027] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.673405] ? mtree_range_walk+0x632/0x900 [ 24.673753] ? mas_walk+0x5c7/0x7c0 [ 24.674045] do_vmi_munmap+0x1f1/0x2b0 [ 24.674353] mmap_region+0x1f9/0x2660 [ 24.674651] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.674967] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.675413] ? __pfx_lock_acquire+0x10/0x10 [ 24.675745] ? __pfx_mmap_region+0x10/0x10 [ 24.676081] ? security_mmap_addr+0x7d/0xa0 [ 24.676415] ? get_unmapped_area+0x1f5/0x3f0 [ 24.676763] do_mmap+0x854/0xf00 [ 24.677034] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.677344] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.677690] ksys_mmap_pgoff+0x3af/0x500 [ 24.678008] do_syscall_64+0x3f/0x90 [ 24.678304] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.678710] RIP: 0033:0x7f23fc2a0d82 [ 24.678998] 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 [ 24.680364] RSP: 002b:00007ffc12d73778 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.680934] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f23fc2a0d82 [ 24.681469] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f23fb6da000 [ 24.682004] RBP: 00007f23fb6da000 R08: 0000000000000009 R09: 0000000000001000 [ 24.682540] R10: 0000000000000812 R11: 0000000000000206 R12: 00005591aee19f70 [ 24.683072] R13: 00007ffc12d73790 R14: 00007ffc12d737c0 R15: 00007ffc12d73b20 [ 24.683609] [ 24.683789] [ 24.683923] Allocated by task 213: [ 24.684197] kasan_save_stack+0x22/0x50 [ 24.684509] kasan_set_track+0x25/0x30 [ 24.684816] __kasan_slab_alloc+0x59/0x70 [ 24.685142] kmem_cache_alloc+0x16b/0x370 [ 24.685465] vm_area_dup+0x20/0x160 [ 24.685745] __split_vma+0x170/0x950 [ 24.686035] split_vma+0xc6/0x110 [ 24.686312] mprotect_fixup+0x8d2/0xb30 [ 24.686625] do_mprotect_pkey+0x87e/0xd40 [ 24.686946] __x64_sys_mprotect+0x78/0xc0 [ 24.687270] do_syscall_64+0x3f/0x90 [ 24.687566] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.687972] [ 24.688105] Freed by task 19: [ 24.688347] kasan_save_stack+0x22/0x50 [ 24.688657] kasan_set_track+0x25/0x30 [ 24.688966] kasan_save_free_info+0x2b/0x50 [ 24.689298] __kasan_slab_free+0x10a/0x190 [ 24.689636] kmem_cache_free+0x10d/0x4d0 [ 24.689952] rcu_core+0x8c8/0x2860 [ 24.690227] __do_softirq+0x1b7/0x7d4 [ 24.690525] [ 24.690662] Last potentially related work creation: [ 24.691028] kasan_save_stack+0x22/0x50 [ 24.691339] __kasan_record_aux_stack+0x8e/0xa0 [ 24.691694] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.692098] remove_vma+0x139/0x170 [ 24.692375] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.692732] do_vmi_munmap+0x1f1/0x2b0 [ 24.693034] __vm_munmap+0x138/0x3a0 [ 24.693323] __x64_sys_munmap+0x59/0x80 [ 24.693632] do_syscall_64+0x3f/0x90 [ 24.693926] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.694321] [ 24.694453] Second to last potentially related work creation: [ 24.694880] kasan_save_stack+0x22/0x50 [ 24.695191] __kasan_record_aux_stack+0x8e/0xa0 [ 24.695547] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.695954] remove_vma+0x139/0x170 [ 24.696237] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.696587] do_vmi_munmap+0x1f1/0x2b0 [ 24.696894] mmap_region+0x1f9/0x2660 [ 24.697190] do_mmap+0x854/0xf00 [ 24.697461] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.697766] ksys_mmap_pgoff+0x3af/0x500 [ 24.698080] do_syscall_64+0x3f/0x90 [ 24.698380] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.698781] [ 24.698916] The buggy address belongs to the object at ffff88800d833740 [ 24.698916] which belongs to the cache vm_area_struct of size 168 [ 24.699841] The buggy address is located 88 bytes inside of [ 24.699841] freed 168-byte region [ffff88800d833740, ffff88800d8337e8) [ 24.700738] [ 24.700872] The buggy address belongs to the physical page: [ 24.701287] page:00000000d4dc1f47 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd833 [ 24.701972] memcg:ffff88800d6b2901 [ 24.702236] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.702672] page_type: 0xffffffff() [ 24.702953] raw: 0100000000000200 ffff88800879fc80 ffffea000036b440 dead000000000007 [ 24.703530] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d6b2901 [ 24.704108] page dumped because: kasan: bad access detected [ 24.704519] [ 24.704655] Memory state around the buggy address: [ 24.705021] ffff88800d833680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.705562] ffff88800d833700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 24.706106] >ffff88800d833780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 24.706644] ^ [ 24.706955] ffff88800d833800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 24.707485] ffff88800d833880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 24.708029] ================================================================== [ 24.708879] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.587755] BUG: Bad rss-counter state mm:00000000af719e03 type:MM_FILEPAGES val:33 [ 26.588902] BUG: Bad rss-counter state mm:00000000af719e03 type:MM_ANONPAGES val:22 [ 27.067148] BUG: Bad rss-counter state mm:00000000ac84c3de type:MM_FILEPAGES val:33 [ 27.068123] BUG: Bad rss-counter state mm:00000000ac84c3de type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51828' (ECDSA) to the list of known hosts. 2023/06/19 13:25:01 fuzzer started 2023/06/19 13:25:01 dialing manager at localhost:44161 2023/06/19 13:25:01 checking machine... 2023/06/19 13:25:01 checking revisions... [ 27.777381] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:25:01 testing simple program... [ 27.836765] cgroup: Unknown subsys name 'net' [ 27.907408] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:25:00 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=ffffffff85fa78c0 RCX=ffffffff83684ee5 RDX=0000000000000000 RSI=ffffffff863b7b2e RDI=ffffffff85fa78c0 RBP=ffffffff85fa78c0 RSP=ffff88800ee7f4f0 R8 =ffffffff863b7b2e R9 =ffff88800ee7f5e8 R10=0000000000038001 R11=000000000008b93b R12=ffffffff85fa78c4 R13=ffffffff85fa78c0 R14=ffffffff85fa78c0 R15=dffffc0000000000 RIP=ffffffff8112fc8c RFL=00000206 [-----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 00007f336c3a9700 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=00007f1fd9fe10e0 CR3=000000001800e000 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=756e696c65735f687373203a726f7272 XMM02=2079746972756365732078756e694c45 XMM03=2064656c696146203a656d616e796278 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323134 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007ffd5fff9000 CR3=000000000ca48000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000