syzkaller login: [ 31.606272] BUG: Bad rss-counter state mm:00000000b103b641 type:MM_FILEPAGES val:33 [ 31.607831] BUG: Bad rss-counter state mm:00000000b103b641 type:MM_ANONPAGES val:22 [ 31.644871] ================================================================== [ 31.645908] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.646995] Read of size 8 at addr ffff888016b46d08 by task sshd/221 [ 31.647903] [ 31.648129] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.649127] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.650215] Call Trace: [ 31.650583] [ 31.650914] dump_stack_lvl+0x91/0xf0 [ 31.651439] print_report+0xcc/0x620 [ 31.651938] ? __virt_addr_valid+0x102/0x340 [ 31.652620] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.653245] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.653864] kasan_report+0xbe/0xf0 [ 31.654347] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.654970] vma_interval_tree_remove+0xc75/0xec0 [ 31.655591] vma_prepare+0xc54/0x11a0 [ 31.656067] __split_vma+0x5af/0x950 [ 31.656547] ? __pfx___split_vma+0x10/0x10 [ 31.657073] ? find_held_lock+0x2c/0x110 [ 31.657588] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.658152] ? lock_is_held_type+0x9f/0x120 [ 31.658699] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.659319] ? mtree_range_walk+0x632/0x900 [ 31.659872] ? mas_walk+0x5c7/0x7c0 [ 31.660349] do_vmi_munmap+0x1f1/0x2b0 [ 31.660845] mmap_region+0x1f9/0x2660 [ 31.661329] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.661863] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.662597] ? __pfx_lock_acquire+0x10/0x10 [ 31.663146] ? __pfx_mmap_region+0x10/0x10 [ 31.663680] ? security_mmap_addr+0x7d/0xa0 [ 31.664214] ? get_unmapped_area+0x1f5/0x3f0 [ 31.664776] do_mmap+0x854/0xf00 [ 31.665220] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.665710] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.666271] ksys_mmap_pgoff+0x3af/0x500 [ 31.666777] do_syscall_64+0x3f/0x90 [ 31.667262] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.667914] RIP: 0033:0x7f1fab9cfd82 [ 31.668373] 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 [ 31.670498] RSP: 002b:00007ffe3374a168 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.671418] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1fab9cfd82 [ 31.672269] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1faae09000 [ 31.673407] RBP: 00007f1faae09000 R08: 0000000000000009 R09: 0000000000001000 [ 31.674552] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563804422ec0 [ 31.675605] R13: 00007ffe3374a180 R14: 00007ffe3374a1b0 R15: 00007ffe3374a510 [ 31.676641] [ 31.676993] [ 31.677247] Allocated by task 214: [ 31.677768] kasan_save_stack+0x22/0x50 [ 31.678388] kasan_set_track+0x25/0x30 [ 31.678969] __kasan_slab_alloc+0x59/0x70 [ 31.679630] kmem_cache_alloc+0x16b/0x370 [ 31.680238] vm_area_dup+0x20/0x160 [ 31.680791] __split_vma+0x170/0x950 [ 31.681360] split_vma+0xc6/0x110 [ 31.681887] mprotect_fixup+0x8d2/0xb30 [ 31.682490] do_mprotect_pkey+0x87e/0xd40 [ 31.683130] __x64_sys_mprotect+0x78/0xc0 [ 31.683771] do_syscall_64+0x3f/0x90 [ 31.684303] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.684966] [ 31.685185] Freed by task 204: [ 31.685600] kasan_save_stack+0x22/0x50 [ 31.686112] kasan_set_track+0x25/0x30 [ 31.686624] kasan_save_free_info+0x2b/0x50 [ 31.687170] __kasan_slab_free+0x10a/0x190 [ 31.687722] kmem_cache_free+0x10d/0x4d0 [ 31.688243] rcu_core+0x8c8/0x2860 [ 31.688696] __do_softirq+0x1b7/0x7d4 [ 31.689184] [ 31.689408] Last potentially related work creation: [ 31.690003] kasan_save_stack+0x22/0x50 [ 31.690525] __kasan_record_aux_stack+0x8e/0xa0 [ 31.691118] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.691777] remove_vma+0x139/0x170 [ 31.692229] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.692812] do_vmi_munmap+0x1f1/0x2b0 [ 31.693313] __vm_munmap+0x138/0x3a0 [ 31.693790] __x64_sys_munmap+0x59/0x80 [ 31.694293] do_syscall_64+0x3f/0x90 [ 31.694788] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.695462] [ 31.695675] Second to last potentially related work creation: [ 31.696377] kasan_save_stack+0x22/0x50 [ 31.696886] __kasan_record_aux_stack+0x8e/0xa0 [ 31.697476] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.698123] remove_vma+0x139/0x170 [ 31.698583] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.699150] do_vmi_munmap+0x1f1/0x2b0 [ 31.699657] mmap_region+0x1f9/0x2660 [ 31.700141] do_mmap+0x854/0xf00 [ 31.700596] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.701091] ksys_mmap_pgoff+0x3af/0x500 [ 31.701614] do_syscall_64+0x3f/0x90 [ 31.702090] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.702748] [ 31.702966] The buggy address belongs to the object at ffff888016b46cb0 [ 31.702966] which belongs to the cache vm_area_struct of size 168 [ 31.704469] The buggy address is located 88 bytes inside of [ 31.704469] freed 168-byte region [ffff888016b46cb0, ffff888016b46d58) [ 31.705892] [ 31.706110] The buggy address belongs to the physical page: [ 31.706778] page:00000000b03d4813 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16b46 [ 31.707904] memcg:ffff88800fd9df01 [ 31.708344] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.709048] page_type: 0xffffffff() [ 31.709515] raw: 0100000000000200 ffff8880087a0c80 ffffea00003775c0 dead000000000007 [ 31.710457] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fd9df01 [ 31.711393] page dumped because: kasan: bad access detected [ 31.712056] [ 31.712273] Memory state around the buggy address: [ 31.712872] ffff888016b46c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.713752] ffff888016b46c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.714622] >ffff888016b46d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.715564] ^ [ 31.716140] ffff888016b46d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.717023] ffff888016b46e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.717922] ================================================================== [ 31.719028] Disabling lock debugging due to kernel taint [ 33.640347] BUG: Bad rss-counter state mm:000000000571a839 type:MM_FILEPAGES val:33 [ 33.641323] BUG: Bad rss-counter state mm:000000000571a839 type:MM_ANONPAGES val:22 [ 34.079352] BUG: Bad rss-counter state mm:000000001b7024e7 type:MM_FILEPAGES val:33 [ 34.080911] BUG: Bad rss-counter state mm:000000001b7024e7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46971' (ECDSA) to the list of known hosts. 2023/06/21 05:43:52 fuzzer started 2023/06/21 05:43:52 dialing manager at localhost:36067 2023/06/21 05:43:52 checking machine... 2023/06/21 05:43:52 checking revisions... [ 34.812459] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:43:52 testing simple program... [ 34.862905] cgroup: Unknown subsys name 'net' [ 34.902784] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:43:51 Registers: info registers vcpu 0 RAX=0000000000020de5 RBX=0000000000000001 RCX=ffffffff8180ce88 RDX=0000000000000014 RSI=ffffffff86139066 RDI=ffffffff85dfe158 RBP=ffff888016a0f6f0 RSP=ffff888016a0f618 R8 =ffffffff86139066 R9 =ffff888016a0f6d8 R10=0000000000038001 R11=0000000000020de5 R12=ffff888016a0f6f8 R13=ffff888016a0f6e0 R14=ffff888016a0f6d9 R15=ffff888016a0f698 RIP=ffffffff8112fc12 RFL=00000206 [-----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 00007fe35f726900 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=00007ffc78927000 CR3=000000000fc90000 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=ffffffff813ad720 RBX=ffffffff813ad470 RCX=ffff88806cf09b38 RDX=1ffff1100d9e135e RSI=ffffffff813ad720 RDI=ffff88806cf09b60 RBP=ffff88806cf09b30 RSP=ffff88806cf09a90 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d951c0 R15=ffff88801c498410 RIP=ffffffff84538440 RFL=00000282 [--S----] 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=00007f6a1c965c50 CR3=000000000cc5c000 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=2031353a33343a3530203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031353a33343a3530203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000