syzkaller login: [ 30.442472] BUG: Bad rss-counter state mm:00000000e24ec47d type:MM_FILEPAGES val:33 [ 30.443483] BUG: Bad rss-counter state mm:00000000e24ec47d type:MM_ANONPAGES val:22 [ 30.601151] ================================================================== [ 30.602243] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.603636] Read of size 8 at addr ffff88800d7bd6b0 by task sshd/221 [ 30.604770] [ 30.605034] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.606000] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.607001] Call Trace: [ 30.607329] [ 30.607631] dump_stack_lvl+0x91/0xf0 [ 30.608137] print_report+0xcc/0x620 [ 30.608663] ? __virt_addr_valid+0x102/0x340 [ 30.609233] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.609885] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.610505] kasan_report+0xbe/0xf0 [ 30.611000] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.611666] vma_interval_tree_remove+0xc75/0xec0 [ 30.612294] vma_prepare+0xc54/0x11a0 [ 30.612803] __split_vma+0x5af/0x950 [ 30.613284] ? __pfx___split_vma+0x10/0x10 [ 30.613841] ? find_held_lock+0x2c/0x110 [ 30.614372] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.614957] ? lock_is_held_type+0x9f/0x120 [ 30.615508] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.616146] ? mtree_range_walk+0x632/0x900 [ 30.616757] ? mas_walk+0x5c7/0x7c0 [ 30.617241] do_vmi_munmap+0x1f1/0x2b0 [ 30.617757] mmap_region+0x1f9/0x2660 [ 30.618256] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.618787] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.619514] ? __pfx_lock_acquire+0x10/0x10 [ 30.620091] ? __pfx_mmap_region+0x10/0x10 [ 30.620666] ? security_mmap_addr+0x7d/0xa0 [ 30.621201] ? get_unmapped_area+0x1f5/0x3f0 [ 30.621767] do_mmap+0x854/0xf00 [ 30.622210] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.622730] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.623298] ksys_mmap_pgoff+0x3af/0x500 [ 30.623854] do_syscall_64+0x3f/0x90 [ 30.624340] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.625028] RIP: 0033:0x7f082541ed82 [ 30.625497] 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 [ 30.627687] RSP: 002b:00007ffc071a5598 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.628618] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f082541ed82 [ 30.629490] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0824858000 [ 30.630348] RBP: 00007f0824858000 R08: 0000000000000009 R09: 0000000000001000 [ 30.631227] R10: 0000000000000812 R11: 0000000000000206 R12: 0000565187d58980 [ 30.632131] R13: 00007ffc071a55b0 R14: 00007ffc071a55e0 R15: 00007ffc071a5940 [ 30.633029] [ 30.633325] [ 30.633540] Allocated by task 214: [ 30.633987] kasan_save_stack+0x22/0x50 [ 30.634501] kasan_set_track+0x25/0x30 [ 30.635015] __kasan_slab_alloc+0x59/0x70 [ 30.635553] kmem_cache_alloc+0x16b/0x370 [ 30.636108] vm_area_dup+0x20/0x160 [ 30.636606] __split_vma+0x170/0x950 [ 30.637093] split_vma+0xc6/0x110 [ 30.637538] mprotect_fixup+0x8d2/0xb30 [ 30.638062] do_mprotect_pkey+0x87e/0xd40 [ 30.638599] __x64_sys_mprotect+0x78/0xc0 [ 30.639127] do_syscall_64+0x3f/0x90 [ 30.639617] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.640296] [ 30.640525] Freed by task 19: [ 30.640945] kasan_save_stack+0x22/0x50 [ 30.641459] kasan_set_track+0x25/0x30 [ 30.641971] kasan_save_free_info+0x2b/0x50 [ 30.642527] __kasan_slab_free+0x10a/0x190 [ 30.643078] kmem_cache_free+0x10d/0x4d0 [ 30.643604] rcu_core+0x8c8/0x2860 [ 30.644071] __do_softirq+0x1b7/0x7d4 [ 30.644573] [ 30.644859] Last potentially related work creation: [ 30.645701] kasan_save_stack+0x22/0x50 [ 30.646224] __kasan_record_aux_stack+0x8e/0xa0 [ 30.646817] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.647467] remove_vma+0x139/0x170 [ 30.647950] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.648539] do_vmi_munmap+0x1f1/0x2b0 [ 30.649046] __vm_munmap+0x138/0x3a0 [ 30.649522] __x64_sys_munmap+0x59/0x80 [ 30.650036] do_syscall_64+0x3f/0x90 [ 30.650515] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.651172] [ 30.651386] The buggy address belongs to the object at ffff88800d7bd658 [ 30.651386] which belongs to the cache vm_area_struct of size 168 [ 30.652912] The buggy address is located 88 bytes inside of [ 30.652912] freed 168-byte region [ffff88800d7bd658, ffff88800d7bd700) [ 30.654331] [ 30.654554] The buggy address belongs to the physical page: [ 30.655225] page:00000000e26d32de refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd7bd [ 30.656340] memcg:ffff88800e1bee01 [ 30.656823] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.657522] page_type: 0xffffffff() [ 30.657994] raw: 0100000000000200 ffff8880087a0c80 ffffea00003bcc00 dead000000000005 [ 30.658932] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e1bee01 [ 30.659867] page dumped because: kasan: bad access detected [ 30.660537] [ 30.660773] Memory state around the buggy address: [ 30.661366] ffff88800d7bd580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.662254] ffff88800d7bd600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.663151] >ffff88800d7bd680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.664037] ^ [ 30.664678] ffff88800d7bd700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 30.665535] ffff88800d7bd780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.666403] ================================================================== [ 30.667355] Disabling lock debugging due to kernel taint [ 32.646174] BUG: Bad rss-counter state mm:00000000fbb642e7 type:MM_FILEPAGES val:33 [ 32.647354] BUG: Bad rss-counter state mm:00000000fbb642e7 type:MM_ANONPAGES val:22 [ 33.120682] BUG: Bad rss-counter state mm:000000006d759e10 type:MM_FILEPAGES val:33 [ 33.121673] BUG: Bad rss-counter state mm:000000006d759e10 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20165' (ECDSA) to the list of known hosts. 2023/06/21 05:51:06 fuzzer started 2023/06/21 05:51:06 dialing manager at localhost:36067 2023/06/21 05:51:06 checking machine... 2023/06/21 05:51:06 checking revisions... [ 33.757602] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:51:06 testing simple program... [ 33.805704] cgroup: Unknown subsys name 'net' [ 33.858897] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:51:06 Registers: info registers vcpu 0 RAX=1ffffffff0c1b04a RBX=0000000000000002 RCX=ffffffff860d8256 RDX=dffffc0000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff860d825a R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000010b8d R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09b40 R15=ffff88806ce09a98 RIP=ffffffff81130b73 RFL=00000213 [----A-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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fa6bf240900 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=00007fa6bf7f80b0 CR3=000000000e66a000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88801b244488 RBX=ffff888013668c48 RCX=1ffff1100173d686 RDX=dffffc0000000000 RSI=ffff88801b2448d0 RDI=ffff888013668c78 RBP=ffff88800b9eb400 RSP=ffff88801435f968 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6d53 R12=ffff88801b244828 R13=0000000000000000 R14=ffff88800cc6e638 R15=ffff88800cc6e5f0 RIP=ffffffff81847688 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fc71b40e900 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=00007fc71a92c000 CR3=000000000d7e0000 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=b3285ca56c489dff000000000010a418 XMM01=d59e07bde36eea69000000000011a5e8 XMM02=ec2efd57dc4c00df000000000011a6f0 XMM03=284e71e5b0ee37c5000000000011a7c0 XMM04=6bb3b8581b529b5600000000000ae988 XMM05=5bd05e87794b076700000000001327e8 XMM06=c291bd5c70af25b90000000000131888 XMM07=e042d86d42eb936e0000000000121de0 XMM08=284e71e5b0ee37c5000000000011a7c0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000