[ 30.784785] BUG: Bad rss-counter state mm:00000000f4ab6ab1 type:MM_FILEPAGES val:33 [ 30.786008] BUG: Bad rss-counter state mm:00000000f4ab6ab1 type:MM_ANONPAGES val:22 [ 30.829356] ================================================================== [ 30.830386] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.831470] Read of size 8 at addr ffff88800967a228 by task sshd/220 [ 30.832396] [ 30.832618] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.833484] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.834470] Call Trace: [ 30.834790] [ 30.835077] dump_stack_lvl+0x91/0xf0 [ 30.835573] print_report+0xcc/0x620 [ 30.836062] ? __virt_addr_valid+0x102/0x340 [ 30.836631] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.837261] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.837880] kasan_report+0xbe/0xf0 [ 30.838359] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.838997] vma_interval_tree_remove+0xc75/0xec0 [ 30.839605] vma_prepare+0xc54/0x11a0 [ 30.840091] __split_vma+0x5af/0x950 [ 30.840593] ? __pfx___split_vma+0x10/0x10 [ 30.841132] ? find_held_lock+0x2c/0x110 [ 30.841659] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.842231] ? lock_is_held_type+0x9f/0x120 [ 30.842779] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.843395] ? mtree_range_walk+0x632/0x900 [ 30.843955] ? mas_walk+0x5c7/0x7c0 [ 30.844442] do_vmi_munmap+0x1f1/0x2b0 [ 30.844946] mmap_region+0x1f9/0x2660 [ 30.845453] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.845975] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.846695] ? __pfx_lock_acquire+0x10/0x10 [ 30.847237] ? __pfx_mmap_region+0x10/0x10 [ 30.847766] ? security_mmap_addr+0x7d/0xa0 [ 30.848322] ? get_unmapped_area+0x1f5/0x3f0 [ 30.848883] do_mmap+0x854/0xf00 [ 30.849328] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.849829] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.850404] ksys_mmap_pgoff+0x3af/0x500 [ 30.850916] do_syscall_64+0x3f/0x90 [ 30.851404] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.852058] RIP: 0033:0x7f3f6ac20d82 [ 30.852535] 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 [ 30.854706] RSP: 002b:00007ffdbbd3f3e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.855624] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3f6ac20d82 [ 30.856516] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3f6a05a000 [ 30.857378] RBP: 00007f3f6a05a000 R08: 0000000000000009 R09: 0000000000001000 [ 30.858232] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560ffef4eec0 [ 30.859099] R13: 00007ffdbbd3f400 R14: 00007ffdbbd3f430 R15: 00007ffdbbd3f790 [ 30.859980] [ 30.860275] [ 30.860504] Allocated by task 213: [ 30.860939] kasan_save_stack+0x22/0x50 [ 30.861457] kasan_set_track+0x25/0x30 [ 30.861956] __kasan_slab_alloc+0x59/0x70 [ 30.862483] kmem_cache_alloc+0x16b/0x370 [ 30.863006] vm_area_dup+0x20/0x160 [ 30.863463] __split_vma+0x170/0x950 [ 30.863937] split_vma+0xc6/0x110 [ 30.864403] mprotect_fixup+0x8d2/0xb30 [ 30.864908] do_mprotect_pkey+0x87e/0xd40 [ 30.865440] __x64_sys_mprotect+0x78/0xc0 [ 30.865972] do_syscall_64+0x3f/0x90 [ 30.866454] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.867114] [ 30.867335] Freed by task 213: [ 30.867746] kasan_save_stack+0x22/0x50 [ 30.868266] kasan_set_track+0x25/0x30 [ 30.868792] kasan_save_free_info+0x2b/0x50 [ 30.869339] __kasan_slab_free+0x10a/0x190 [ 30.869884] kmem_cache_free+0x10d/0x4d0 [ 30.870403] rcu_core+0x8c8/0x2860 [ 30.870856] __do_softirq+0x1b7/0x7d4 [ 30.871346] [ 30.871565] Last potentially related work creation: [ 30.872293] kasan_save_stack+0x22/0x50 [ 30.872816] __kasan_record_aux_stack+0x8e/0xa0 [ 30.873404] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.874058] remove_vma+0x139/0x170 [ 30.874519] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.875092] do_vmi_munmap+0x1f1/0x2b0 [ 30.875583] __vm_munmap+0x138/0x3a0 [ 30.876056] __x64_sys_munmap+0x59/0x80 [ 30.876592] do_syscall_64+0x3f/0x90 [ 30.877077] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.877728] [ 30.877951] Second to last potentially related work creation: [ 30.878646] kasan_save_stack+0x22/0x50 [ 30.879150] __kasan_record_aux_stack+0x8e/0xa0 [ 30.879745] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.880403] remove_vma+0x139/0x170 [ 30.880869] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.881431] do_vmi_munmap+0x1f1/0x2b0 [ 30.881924] mmap_region+0x1f9/0x2660 [ 30.882410] do_mmap+0x854/0xf00 [ 30.882851] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.883344] ksys_mmap_pgoff+0x3af/0x500 [ 30.883858] do_syscall_64+0x3f/0x90 [ 30.884357] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.885014] [ 30.885236] The buggy address belongs to the object at ffff88800967a1d0 [ 30.885236] which belongs to the cache vm_area_struct of size 168 [ 30.886755] The buggy address is located 88 bytes inside of [ 30.886755] freed 168-byte region [ffff88800967a1d0, ffff88800967a278) [ 30.888185] [ 30.888420] The buggy address belongs to the physical page: [ 30.889078] page:000000009d3a95d8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x967a [ 30.890168] memcg:ffff888016cc2601 [ 30.890600] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.891308] page_type: 0xffffffff() [ 30.891769] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 0000000000000001 [ 30.892725] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016cc2601 [ 30.893646] page dumped because: kasan: bad access detected [ 30.894318] [ 30.894537] Memory state around the buggy address: [ 30.895126] ffff88800967a100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.895999] ffff88800967a180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.896881] >ffff88800967a200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.897739] ^ [ 30.898311] ffff88800967a280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.899189] ffff88800967a300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.900053] ================================================================== Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 30.901773] Disabling lock debugging due to kernel taint [ 33.620757] BUG: Bad rss-counter state mm:0000000092f129e2 type:MM_FILEPAGES val:33 [ 33.621746] BUG: Bad rss-counter state mm:0000000092f129e2 type:MM_ANONPAGES val:22 [ 34.103466] BUG: Bad rss-counter state mm:00000000a6e8a7f0 type:MM_FILEPAGES val:33 [ 34.104526] BUG: Bad rss-counter state mm:00000000a6e8a7f0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14560' (ECDSA) to the list of known hosts. 2023/06/20 22:42:38 fuzzer started 2023/06/20 22:42:38 dialing manager at localhost:36067 2023/06/20 22:42:38 checking machine... 2023/06/20 22:42:38 checking revisions... [ 34.831385] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:42:38 testing simple program... [ 34.872976] cgroup: Unknown subsys name 'net' [ 34.921124] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:42:38 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffff888014777738 RDX=1ffff110028eeede RSI=1ffff110028eeed5 RDI=ffff888014777698 RBP=ffff8880147776f0 RSP=ffff8880147775d8 R8 =0000000000000000 R9 =0000000000000000 R10=ffff888014777698 R11=00000000000b6a61 R12=ffffed10028eeed5 R13=ffffed10028eeed4 R14=ffff8880147776e0 R15=ffff888014777698 RIP=ffffffff8113062c 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 00007fa9102f5900 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=0000562eea9f6818 CR3=000000000cb2e000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=f2dc04a6e7b84ed900000000000ae988 XMM05=6f9a0b4e773cb7580000000000133968 XMM06=c291bd5c70af25b90000000000132698 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=ffff888008c04400 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=00007ffe0f81b458 CR3=000000000dbb2000 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=2037333a32343a3232203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a32343a3232203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000