[ 51.713534] BUG: Bad rss-counter state mm:00000000a0c2538c type:MM_FILEPAGES val:33 [ 51.714230] BUG: Bad rss-counter state mm:00000000a0c2538c type:MM_ANONPAGES val:22 [ 51.751903] ================================================================== [ 51.752503] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 51.753108] Read of size 8 at addr ffff88800d982140 by task sshd/220 [ 51.753598] [ 51.753741] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 51.754292] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 51.755040] Call Trace: [ 51.755263] [ 51.755456] dump_stack_lvl+0x91/0xf0 [ 51.755811] print_report+0xcc/0x620 [ 51.756140] ? __virt_addr_valid+0x102/0x340 [ 51.756510] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.756919] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.757325] kasan_report+0xbe/0xf0 [ 51.757645] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.758060] vma_interval_tree_remove+0xc75/0xec0 [ 51.758465] vma_prepare+0xc54/0x11a0 [ 51.758888] __split_vma+0x5af/0x950 [ 51.759217] ? __pfx___split_vma+0x10/0x10 [ 51.759832] ? find_held_lock+0x2c/0x110 [ 51.760177] do_vmi_align_munmap+0x2ba/0x11f0 [ 51.760542] ? lock_is_held_type+0x9f/0x120 [ 51.760892] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 51.761283] ? mtree_range_walk+0x632/0x900 [ 51.761642] ? mas_walk+0x5c7/0x7c0 [ 51.761949] do_vmi_munmap+0x1f1/0x2b0 [ 51.762270] mmap_region+0x1f9/0x2660 [ 51.762585] ? vm_mmap_pgoff+0x15c/0x3a0 [ 51.763037] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 51.763515] ? __pfx_lock_acquire+0x10/0x10 [ 51.763873] ? __pfx_mmap_region+0x10/0x10 [ 51.764231] ? security_mmap_addr+0x7d/0xa0 [ 51.764582] ? get_unmapped_area+0x1f5/0x3f0 [ 51.764937] do_mmap+0x854/0xf00 [ 51.765224] vm_mmap_pgoff+0x1a6/0x3a0 [ 51.765730] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 51.766100] ksys_mmap_pgoff+0x3af/0x500 [ 51.766428] do_syscall_64+0x3f/0x90 [ 51.766743] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.767173] RIP: 0033:0x7f9d4876fd82 [ 51.767471] 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 [ 51.768857] RSP: 002b:00007ffd31b0a7b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 51.769451] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9d4876fd82 [ 51.772814] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9d47ba9000 [ 51.773379] RBP: 00007f9d47ba9000 R08: 0000000000000009 R09: 0000000000001000 [ 51.774078] R10: 0000000000000812 R11: 0000000000000206 R12: 00005636c8095f70 [ 51.774794] R13: 00007ffd31b0a7d0 R14: 00007ffd31b0a800 R15: 00007ffd31b0ab60 [ 51.775525] [ 51.775716] [ 51.775856] Allocated by task 213: [ 51.776140] kasan_save_stack+0x22/0x50 [ 51.776709] kasan_set_track+0x25/0x30 [ 51.777036] __kasan_slab_alloc+0x59/0x70 [ 51.777374] kmem_cache_alloc+0x16b/0x370 [ 51.777712] vm_area_dup+0x20/0x160 [ 51.778015] __split_vma+0x170/0x950 [ 51.778326] split_vma+0xc6/0x110 [ 51.778620] mprotect_fixup+0x8d2/0xb30 [ 51.785039] do_mprotect_pkey+0x87e/0xd40 [ 51.785382] __x64_sys_mprotect+0x78/0xc0 [ 51.785720] do_syscall_64+0x3f/0x90 [ 51.786029] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.786446] [ 51.786593] Freed by task 0: [ 51.786870] kasan_save_stack+0x22/0x50 [ 51.787210] kasan_set_track+0x25/0x30 [ 51.787536] kasan_save_free_info+0x2b/0x50 [ 51.787893] __kasan_slab_free+0x10a/0x190 [ 51.788250] kmem_cache_free+0x10d/0x4d0 [ 51.788589] rcu_core+0x8c8/0x2860 [ 51.788889] __do_softirq+0x1b7/0x7d4 [ 51.789206] [ 51.789355] Last potentially related work creation: [ 51.789739] kasan_save_stack+0x22/0x50 [ 51.790077] __kasan_record_aux_stack+0x8e/0xa0 [ 51.790459] __call_rcu_common.constprop.0+0x6a/0xb90 [ 51.791219] remove_vma+0x139/0x170 [ 51.791522] do_vmi_align_munmap+0xd4a/0x11f0 [ 51.791894] do_vmi_munmap+0x1f1/0x2b0 [ 51.792228] __vm_munmap+0x138/0x3a0 [ 51.792762] __x64_sys_munmap+0x59/0x80 [ 51.793102] do_syscall_64+0x3f/0x90 [ 51.793516] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.793953] [ 51.794110] The buggy address belongs to the object at ffff88800d9820e8 [ 51.794110] which belongs to the cache vm_area_struct of size 168 [ 51.795232] The buggy address is located 88 bytes inside of [ 51.795232] freed 168-byte region [ffff88800d9820e8, ffff88800d982190) [ 51.796231] [ 51.796377] The buggy address belongs to the physical page: [ 51.797064] page:000000003f477b83 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd982 [ 51.797869] memcg:ffff8880095c2401 [ 51.798132] flags: 0x100000000000200(slab|node=0|zone=1) [ 51.798668] page_type: 0xffffffff() [ 51.799042] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 51.799654] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880095c2401 [ 51.800339] page dumped because: kasan: bad access detected [ 51.800779] [ 51.800925] Memory state around the buggy address: [ 51.801498] ffff88800d982000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 51.802061] ffff88800d982080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 51.802615] >ffff88800d982100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 51.803190] ^ [ 51.803609] ffff88800d982180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 51.804172] ffff88800d982200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 51.804729] ================================================================== [ 51.805541] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 54.829188] BUG: Bad rss-counter state mm:0000000004d5f7ff type:MM_FILEPAGES val:33 [ 54.829895] BUG: Bad rss-counter state mm:0000000004d5f7ff type:MM_ANONPAGES val:22 [ 55.541418] BUG: Bad rss-counter state mm:00000000657d37fb type:MM_FILEPAGES val:33 [ 55.542187] BUG: Bad rss-counter state mm:00000000657d37fb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56348' (ECDSA) to the list of known hosts. 2023/06/20 08:17:57 fuzzer started 2023/06/20 08:17:57 dialing manager at localhost:44161 2023/06/20 08:17:57 checking machine... 2023/06/20 08:17:57 checking revisions... [ 56.529565] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:17:57 testing simple program... [ 56.578647] cgroup: Unknown subsys name 'net' [ 56.681367] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:17:36 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f0e150ef328 CR3=0000000005482000 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=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 info registers vcpu 1 RAX=ffff888019b40fb8 RBX=ffff88801a0e04c8 RCX=1ffff1100341c099 RDX=1ffff11002d50347 RSI=ffff888019b40fb8 RDI=ffff88801a0e04c8 RBP=ffff888016a81a38 RSP=ffff88801459f948 R8 =0000000000000006 R9 =000000000000002d R10=000000000000002d R11=00000000000b6996 R12=ffff8880167ba699 R13=dffffc0000000000 R14=ffff888019b40fc8 R15=ffffffff816e61c0 RIP=ffffffff844ce472 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 00007fdc6ae42900 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=00007fe9d0eb7e70 CR3=000000000ce78000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000