[ 23.889602] BUG: Bad rss-counter state mm:0000000062da438d type:MM_FILEPAGES val:33 [ 23.890800] BUG: Bad rss-counter state mm:0000000062da438d type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 23.934909] ================================================================== [ 23.935978] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.937096] Read of size 8 at addr ffff88800df9e798 by task sshd/220 [ 23.937864] [ 23.938090] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.938966] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.939955] Call Trace: [ 23.940279] [ 23.940568] dump_stack_lvl+0x91/0xf0 [ 23.941067] print_report+0xcc/0x620 [ 23.941550] ? __virt_addr_valid+0x102/0x340 [ 23.942110] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.942725] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.943375] kasan_report+0xbe/0xf0 [ 23.943853] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.944474] vma_interval_tree_remove+0xc75/0xec0 [ 23.945092] vma_prepare+0xc54/0x11a0 [ 23.945573] __split_vma+0x5af/0x950 [ 23.946057] ? __pfx___split_vma+0x10/0x10 [ 23.946596] ? find_held_lock+0x2c/0x110 [ 23.947147] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.947718] ? lock_is_held_type+0x9f/0x120 [ 23.948263] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.948880] ? mtree_range_walk+0x632/0x900 [ 23.949445] ? mas_walk+0x5c7/0x7c0 [ 23.949938] do_vmi_munmap+0x1f1/0x2b0 [ 23.950431] mmap_region+0x1f9/0x2660 [ 23.950918] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.951438] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.952155] ? __pfx_lock_acquire+0x10/0x10 [ 23.952691] ? __pfx_mmap_region+0x10/0x10 [ 23.953240] ? security_mmap_addr+0x7d/0xa0 [ 23.953771] ? get_unmapped_area+0x1f5/0x3f0 [ 23.954325] do_mmap+0x854/0xf00 [ 23.954766] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.955288] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.955862] ksys_mmap_pgoff+0x3af/0x500 [ 23.956376] do_syscall_64+0x3f/0x90 [ 23.956876] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.957534] RIP: 0033:0x7f7cf2aa7d82 [ 23.958002] 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 [ 23.960144] RSP: 002b:00007ffe221d53d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.961085] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7cf2aa7d82 [ 23.961952] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7cf1ee1000 [ 23.962835] RBP: 00007f7cf1ee1000 R08: 0000000000000009 R09: 0000000000001000 [ 23.963706] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e6db6a7f70 [ 23.964570] R13: 00007ffe221d53f0 R14: 00007ffe221d5420 R15: 00007ffe221d5780 [ 23.965440] [ 23.965744] [ 23.965960] Allocated by task 213: [ 23.966389] kasan_save_stack+0x22/0x50 [ 23.966898] kasan_set_track+0x25/0x30 [ 23.967416] __kasan_slab_alloc+0x59/0x70 [ 23.967953] kmem_cache_alloc+0x16b/0x370 [ 23.968483] vm_area_dup+0x20/0x160 [ 23.968939] __split_vma+0x170/0x950 [ 23.969415] split_vma+0xc6/0x110 [ 23.969859] mprotect_fixup+0x8d2/0xb30 [ 23.970365] do_mprotect_pkey+0x87e/0xd40 [ 23.970902] __x64_sys_mprotect+0x78/0xc0 [ 23.971450] do_syscall_64+0x3f/0x90 [ 23.971940] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.972585] [ 23.972804] Freed by task 213: [ 23.973202] kasan_save_stack+0x22/0x50 [ 23.973710] kasan_set_track+0x25/0x30 [ 23.974209] kasan_save_free_info+0x2b/0x50 [ 23.974751] __kasan_slab_free+0x10a/0x190 [ 23.975312] kmem_cache_free+0x10d/0x4d0 [ 23.975828] rcu_core+0x8c8/0x2860 [ 23.976280] __do_softirq+0x1b7/0x7d4 [ 23.976765] [ 23.976988] Last potentially related work creation: [ 23.977582] kasan_save_stack+0x22/0x50 [ 23.978103] __kasan_record_aux_stack+0x8e/0xa0 [ 23.978682] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.979346] remove_vma+0x139/0x170 [ 23.979804] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.980366] do_vmi_munmap+0x1f1/0x2b0 [ 23.980863] __vm_munmap+0x138/0x3a0 [ 23.981333] __x64_sys_munmap+0x59/0x80 [ 23.981838] do_syscall_64+0x3f/0x90 [ 23.982326] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.982975] [ 23.983201] The buggy address belongs to the object at ffff88800df9e740 [ 23.983201] which belongs to the cache vm_area_struct of size 168 [ 23.984688] The buggy address is located 88 bytes inside of [ 23.984688] freed 168-byte region [ffff88800df9e740, ffff88800df9e7e8) [ 23.986108] [ 23.986327] The buggy address belongs to the physical page: [ 23.986986] page:00000000882e196f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf9e [ 23.988105] memcg:ffff88800d6eff01 [ 23.988545] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.989201] page_type: 0xffffffff() [ 23.989658] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 23.990600] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d6eff01 [ 23.991538] page dumped because: kasan: bad access detected [ 23.992211] [ 23.992436] Memory state around the buggy address: [ 23.993021] ffff88800df9e680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.993891] ffff88800df9e700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 23.994762] >ffff88800df9e780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 23.995647] ^ [ 23.996147] ffff88800df9e800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 23.997022] ffff88800df9e880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 23.997892] ================================================================== [ 23.999141] Disabling lock debugging due to kernel taint [ 25.879862] BUG: Bad rss-counter state mm:000000007b5dfe49 type:MM_FILEPAGES val:33 [ 25.881124] BUG: Bad rss-counter state mm:000000007b5dfe49 type:MM_ANONPAGES val:22 [ 26.360143] BUG: Bad rss-counter state mm:0000000075207bd8 type:MM_FILEPAGES val:33 [ 26.361081] BUG: Bad rss-counter state mm:0000000075207bd8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60726' (ECDSA) to the list of known hosts. 2023/06/20 19:30:12 fuzzer started 2023/06/20 19:30:12 dialing manager at localhost:36067 2023/06/20 19:30:12 checking machine... 2023/06/20 19:30:12 checking revisions... [ 27.088492] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:30:13 testing simple program... [ 27.142361] cgroup: Unknown subsys name 'net' [ 27.179905] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:30:12 Registers: info registers vcpu 0 RAX=000000000000000c RBX=0000000000000400 RCX=0000000000000400 RDX=0000555b44bbf770 RSI=0000555b44bbf740 RDI=0000555b44baece0 RBP=0000000000000400 RSP=fffffe0000002fd0 R8 =00007ffdd79f54a8 R9 =00007febde6f7be0 R10=000000000000006e R11=0000000000000000 R12=0000555b44bbf740 R13=0000555b44baece0 R14=0000555b44bbf770 R15=00007ffdd79f54a8 RIP=ffffffff84601264 RFL=00000083 [--S---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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007febde145900 00000000 00000000 GS =0000 0000000000000000 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=00007febde6fd0b0 CR3=000000000fd5c000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f3374f744c0 CR3=000000000efbc000 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=c6f93694fb83028c4b4c0cce01b6d635 XMM02=000000000011a0b8ec2efd57dc4c00df XMM03=0000000000120b386e7bc09bb3b68a61 XMM04=4aa3f013d039ad8700000000000ae988 XMM05=cd4c4676bc3cc63e0000000000130c08 XMM06=4fda316b135da52b0000000000130890 XMM07=e042d86d42eb936e0000000000120db8 XMM08=6e7bc09bb3b68a61000000000011a118 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000