syzkaller login: [ 28.917141] BUG: Bad rss-counter state mm:00000000ac7dca39 type:MM_FILEPAGES val:33 [ 28.918544] BUG: Bad rss-counter state mm:00000000ac7dca39 type:MM_ANONPAGES val:22 [ 29.072103] ================================================================== [ 29.073008] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.073936] Read of size 8 at addr ffff888018ab7310 by task sshd/221 [ 29.074702] [ 29.074916] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.075900] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.076876] Call Trace: [ 29.077192] [ 29.077473] dump_stack_lvl+0x91/0xf0 [ 29.077980] print_report+0xcc/0x620 [ 29.078456] ? __virt_addr_valid+0x102/0x340 [ 29.079020] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.079680] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.080303] kasan_report+0xbe/0xf0 [ 29.080799] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.081413] vma_interval_tree_remove+0xc75/0xec0 [ 29.082032] vma_prepare+0xc54/0x11a0 [ 29.082509] __split_vma+0x5af/0x950 [ 29.082992] ? __pfx___split_vma+0x10/0x10 [ 29.083525] ? find_held_lock+0x2c/0x110 [ 29.084106] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.084694] ? lock_is_held_type+0x9f/0x120 [ 29.085236] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.085862] ? mtree_range_walk+0x632/0x900 [ 29.086413] ? mas_walk+0x5c7/0x7c0 [ 29.086910] do_vmi_munmap+0x1f1/0x2b0 [ 29.087402] mmap_region+0x1f9/0x2660 [ 29.087927] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.088437] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.089213] ? __pfx_lock_acquire+0x10/0x10 [ 29.089802] ? __pfx_mmap_region+0x10/0x10 [ 29.090378] ? security_mmap_addr+0x7d/0xa0 [ 29.090966] ? get_unmapped_area+0x1f5/0x3f0 [ 29.091565] do_mmap+0x854/0xf00 [ 29.092059] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.092599] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.093201] ksys_mmap_pgoff+0x3af/0x500 [ 29.093757] do_syscall_64+0x3f/0x90 [ 29.094275] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.094984] RIP: 0033:0x7f77a76b4d82 [ 29.095476] 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 [ 29.097852] RSP: 002b:00007ffffaac90d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.098830] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f77a76b4d82 [ 29.099771] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f77a6aee000 [ 29.100620] RBP: 00007f77a6aee000 R08: 0000000000000009 R09: 0000000000001000 [ 29.101464] R10: 0000000000000812 R11: 0000000000000206 R12: 000055760e8a0ec0 [ 29.102311] R13: 00007ffffaac90f0 R14: 00007ffffaac9120 R15: 00007ffffaac9480 [ 29.103177] [ 29.103466] [ 29.103725] Allocated by task 213: [ 29.104155] kasan_save_stack+0x22/0x50 [ 29.104672] kasan_set_track+0x25/0x30 [ 29.105171] __kasan_slab_alloc+0x59/0x70 [ 29.105704] kmem_cache_alloc+0x16b/0x370 [ 29.106218] vm_area_dup+0x20/0x160 [ 29.106683] __split_vma+0x170/0x950 [ 29.107153] split_vma+0xc6/0x110 [ 29.107612] mprotect_fixup+0x8d2/0xb30 [ 29.108154] do_mprotect_pkey+0x87e/0xd40 [ 29.108683] __x64_sys_mprotect+0x78/0xc0 [ 29.109204] do_syscall_64+0x3f/0x90 [ 29.109691] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.110338] [ 29.110559] Freed by task 213: [ 29.110961] kasan_save_stack+0x22/0x50 [ 29.111467] kasan_set_track+0x25/0x30 [ 29.112005] kasan_save_free_info+0x2b/0x50 [ 29.112544] __kasan_slab_free+0x10a/0x190 [ 29.113093] kmem_cache_free+0x10d/0x4d0 [ 29.113618] rcu_core+0x8c8/0x2860 [ 29.114063] __do_softirq+0x1b7/0x7d4 [ 29.114545] [ 29.114766] Last potentially related work creation: [ 29.115353] kasan_save_stack+0x22/0x50 [ 29.115907] __kasan_record_aux_stack+0x8e/0xa0 [ 29.116483] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.117134] remove_vma+0x139/0x170 [ 29.117597] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.118155] do_vmi_munmap+0x1f1/0x2b0 [ 29.118648] __vm_munmap+0x138/0x3a0 [ 29.119110] __x64_sys_munmap+0x59/0x80 [ 29.119626] do_syscall_64+0x3f/0x90 [ 29.120123] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.120777] [ 29.120991] The buggy address belongs to the object at ffff888018ab72b8 [ 29.120991] which belongs to the cache vm_area_struct of size 168 [ 29.122813] The buggy address is located 88 bytes inside of [ 29.122813] freed 168-byte region [ffff888018ab72b8, ffff888018ab7360) [ 29.124585] [ 29.124858] The buggy address belongs to the physical page: [ 29.125587] page:000000008fd1c00b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18ab7 [ 29.126693] memcg:ffff88800d592301 [ 29.127113] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.127805] page_type: 0xffffffff() [ 29.128252] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 29.129177] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d592301 [ 29.130091] page dumped because: kasan: bad access detected [ 29.130762] [ 29.130975] Memory state around the buggy address: [ 29.131554] ffff888018ab7200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 29.132432] ffff888018ab7280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 29.133287] >ffff888018ab7300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 29.134143] ^ [ 29.134616] ffff888018ab7380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 29.135467] ffff888018ab7400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 29.136346] ================================================================== [ 29.137314] Disabling lock debugging due to kernel taint [ 31.061724] BUG: Bad rss-counter state mm:0000000083209187 type:MM_FILEPAGES val:33 [ 31.062710] BUG: Bad rss-counter state mm:0000000083209187 type:MM_ANONPAGES val:22 [ 31.558151] BUG: Bad rss-counter state mm:00000000281bf29d type:MM_FILEPAGES val:33 [ 31.559401] BUG: Bad rss-counter state mm:00000000281bf29d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29679' (ECDSA) to the list of known hosts. 2023/06/20 18:02:12 fuzzer started 2023/06/20 18:02:13 dialing manager at localhost:36067 2023/06/20 18:02:13 checking machine... 2023/06/20 18:02:13 checking revisions... [ 32.274286] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:02:13 testing simple program... [ 32.323218] cgroup: Unknown subsys name 'net' [ 32.365267] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:02:12 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff812d86ea RDX=1ffff110018cfa09 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff110028f9ef1 RSP=ffff8880147cf770 R8 =0000000000000001 R9 =ffffed10028f9ef9 R10=0000000000000003 R11=0030733a745f6c65 R12=ffffffff856d84b8 R13=ffffffff845196aa R14=ffffffff81eeadb0 R15=1ffff110028f9f1d RIP=ffffffff8180fea8 RFL=00000056 [---ZAP-] 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 00007fcd1800a700 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=00007f097af3cda0 CR3=000000000ef4e000 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=63736964203a31313a32393433342074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323934 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=1ffff11001c66c5f RBX=ffff88800e3362c8 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800e3362f8 RBP=ffff8880160eacb8 RSP=ffff888008e37c98 R8 =0000000000000001 R9 =ffffed10011c6f87 R10=0000000000000003 R11=0000000000000128 R12=dffffc0000000000 R13=ffff8880160d7300 R14=ffffffff818d9c06 R15=ffff88800ef66b80 RIP=ffffffff818464e2 RFL=00000046 [---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=00007fff45e4d000 CR3=000000001bd3a000 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=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000