syzkaller login: [ 31.393723] BUG: Bad rss-counter state mm:00000000fd49c0fc type:MM_FILEPAGES val:33 [ 31.395771] BUG: Bad rss-counter state mm:00000000fd49c0fc type:MM_ANONPAGES val:22 [ 31.556022] ================================================================== [ 31.557094] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.558223] Read of size 8 at addr ffff888009718310 by task sshd/222 [ 31.559219] [ 31.559441] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.560307] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.561330] Call Trace: [ 31.561669] [ 31.561969] dump_stack_lvl+0x91/0xf0 [ 31.562495] print_report+0xcc/0x620 [ 31.562995] ? __virt_addr_valid+0x102/0x340 [ 31.563566] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.564216] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.564871] kasan_report+0xbe/0xf0 [ 31.565368] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.566009] vma_interval_tree_remove+0xc75/0xec0 [ 31.566653] vma_prepare+0xc54/0x11a0 [ 31.567159] __split_vma+0x5af/0x950 [ 31.567660] ? __pfx___split_vma+0x10/0x10 [ 31.568219] ? find_held_lock+0x2c/0x110 [ 31.568770] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.569361] ? lock_is_held_type+0x9f/0x120 [ 31.569930] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.570574] ? mtree_range_walk+0x632/0x900 [ 31.571149] ? mas_walk+0x5c7/0x7c0 [ 31.571623] do_vmi_munmap+0x1f1/0x2b0 [ 31.572119] mmap_region+0x1f9/0x2660 [ 31.572606] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.573117] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.573833] ? __pfx_lock_acquire+0x10/0x10 [ 31.574381] ? __pfx_mmap_region+0x10/0x10 [ 31.574919] ? security_mmap_addr+0x7d/0xa0 [ 31.575464] ? get_unmapped_area+0x1f5/0x3f0 [ 31.576015] do_mmap+0x854/0xf00 [ 31.576454] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.576964] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.577535] ksys_mmap_pgoff+0x3af/0x500 [ 31.578068] do_syscall_64+0x3f/0x90 [ 31.578626] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.579274] RIP: 0033:0x7f1023f24d82 [ 31.579727] 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 [ 31.581875] RSP: 002b:00007ffe50e6c4d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.582810] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1023f24d82 [ 31.583666] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f102335e000 [ 31.584520] RBP: 00007f102335e000 R08: 0000000000000009 R09: 0000000000001000 [ 31.585360] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564ab90acec0 [ 31.586206] R13: 00007ffe50e6c4f0 R14: 00007ffe50e6c520 R15: 00007ffe50e6c880 [ 31.587085] [ 31.587392] [ 31.587616] Allocated by task 214: [ 31.588057] kasan_save_stack+0x22/0x50 [ 31.588579] kasan_set_track+0x25/0x30 [ 31.589092] __kasan_slab_alloc+0x59/0x70 [ 31.589643] kmem_cache_alloc+0x16b/0x370 [ 31.590165] vm_area_dup+0x20/0x160 [ 31.590634] __split_vma+0x170/0x950 [ 31.591100] split_vma+0xc6/0x110 [ 31.591538] mprotect_fixup+0x8d2/0xb30 [ 31.592037] do_mprotect_pkey+0x87e/0xd40 [ 31.592557] __x64_sys_mprotect+0x78/0xc0 [ 31.593076] do_syscall_64+0x3f/0x90 [ 31.593553] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.594195] [ 31.594418] Freed by task 214: [ 31.594807] kasan_save_stack+0x22/0x50 [ 31.595307] kasan_set_track+0x25/0x30 [ 31.595800] kasan_save_free_info+0x2b/0x50 [ 31.596333] __kasan_slab_free+0x10a/0x190 [ 31.596866] kmem_cache_free+0x10d/0x4d0 [ 31.597376] rcu_core+0x8c8/0x2860 [ 31.597821] __do_softirq+0x1b7/0x7d4 [ 31.598312] [ 31.598527] Last potentially related work creation: [ 31.599111] kasan_save_stack+0x22/0x50 [ 31.599614] __kasan_record_aux_stack+0x8e/0xa0 [ 31.600287] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.600928] remove_vma+0x139/0x170 [ 31.601378] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.601937] do_vmi_munmap+0x1f1/0x2b0 [ 31.602430] __vm_munmap+0x138/0x3a0 [ 31.602898] __x64_sys_munmap+0x59/0x80 [ 31.603391] do_syscall_64+0x3f/0x90 [ 31.603861] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.604503] [ 31.604721] The buggy address belongs to the object at ffff8880097182b8 [ 31.604721] which belongs to the cache vm_area_struct of size 168 [ 31.606179] The buggy address is located 88 bytes inside of [ 31.606179] freed 168-byte region [ffff8880097182b8, ffff888009718360) [ 31.607600] [ 31.607816] The buggy address belongs to the physical page: [ 31.608475] page:00000000b4dbb5db refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9718 [ 31.609571] memcg:ffff88800f6a4d01 [ 31.610004] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.610711] page_type: 0xffffffff() [ 31.611161] raw: 0100000000000200 ffff88800879fc80 ffffea00003caf80 dead000000000005 [ 31.612076] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f6a4d01 [ 31.612984] page dumped because: kasan: bad access detected [ 31.613638] [ 31.613853] Memory state around the buggy address: [ 31.614456] ffff888009718200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.615311] ffff888009718280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.616159] >ffff888009718300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.617006] ^ [ 31.617478] ffff888009718380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.618344] ffff888009718400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.619192] ================================================================== [ 31.620198] Disabling lock debugging due to kernel taint [ 34.000985] BUG: Bad rss-counter state mm:000000009c76e45c type:MM_FILEPAGES val:33 [ 34.002235] BUG: Bad rss-counter state mm:000000009c76e45c type:MM_ANONPAGES val:22 [ 34.397802] BUG: Bad rss-counter state mm:0000000050e36da6 type:MM_FILEPAGES val:33 [ 34.398803] BUG: Bad rss-counter state mm:0000000050e36da6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26913' (ECDSA) to the list of known hosts. 2023/06/20 08:26:33 fuzzer started 2023/06/20 08:26:34 dialing manager at localhost:44161 2023/06/20 08:26:34 checking machine... 2023/06/20 08:26:34 checking revisions... [ 35.082883] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:26:34 testing simple program... [ 35.133054] cgroup: Unknown subsys name 'net' [ 35.193619] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:26:33 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff8153457f RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff8450c12e RSP=ffff88801036ff08 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000007 R13=0000000000000000 R14=00007f4068cb334c R15=0000000000000000 RIP=ffffffff81534598 RFL=00000002 [-------] 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 00007f40686f9900 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=00007f4068cb334c CR3=0000000019dc8000 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=6720646572637465733a4d41503d706f 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007fe4b9d70270 CR3=000000000cb0c000 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=5ff8535f2a33e58918438b9a17ac72f0 XMM02=0000000000121d90ec2efd57dc4c00df XMM03=0000000000124e202e0aea72e4ec752d XMM04=fefac1bccf4dff6d00000000000ae988 XMM05=59d5b690e0af863b0000000000134910 XMM06=75ae91c9f14e9cb70000000000133778 XMM07=e042d86d42eb936e00000000001250a0 XMM08=2e0aea72e4ec752d0000000000121df0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000