syzkaller login: [ 33.616257] BUG: Bad rss-counter state mm:00000000b62f3199 type:MM_FILEPAGES val:33 [ 33.617041] BUG: Bad rss-counter state mm:00000000b62f3199 type:MM_ANONPAGES val:22 [ 33.647501] ================================================================== [ 33.648291] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.649046] Read of size 8 at addr ffff88800f63b4e0 by task sshd/221 [ 33.649586] [ 33.649749] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.650346] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.650973] Call Trace: [ 33.651179] [ 33.651375] dump_stack_lvl+0x91/0xf0 [ 33.651737] print_report+0xcc/0x620 [ 33.652201] ? __virt_addr_valid+0x102/0x340 [ 33.652669] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.653079] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.653477] kasan_report+0xbe/0xf0 [ 33.653785] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.654190] vma_interval_tree_remove+0xc75/0xec0 [ 33.654591] vma_prepare+0xc54/0x11a0 [ 33.654887] __split_vma+0x5af/0x950 [ 33.655190] ? __pfx___split_vma+0x10/0x10 [ 33.655555] ? find_held_lock+0x2c/0x110 [ 33.655918] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.656307] ? lock_is_held_type+0x9f/0x120 [ 33.656709] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.657141] ? mtree_range_walk+0x632/0x900 [ 33.657533] ? mas_walk+0x5c7/0x7c0 [ 33.657864] do_vmi_munmap+0x1f1/0x2b0 [ 33.658197] mmap_region+0x1f9/0x2660 [ 33.658535] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.658889] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.659377] ? __pfx_lock_acquire+0x10/0x10 [ 33.659745] ? __pfx_mmap_region+0x10/0x10 [ 33.660097] ? security_mmap_addr+0x7d/0xa0 [ 33.660426] ? get_unmapped_area+0x1f5/0x3f0 [ 33.660799] do_mmap+0x854/0xf00 [ 33.661084] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.661441] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.661843] ksys_mmap_pgoff+0x3af/0x500 [ 33.662201] do_syscall_64+0x3f/0x90 [ 33.662575] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.663028] RIP: 0033:0x7f7d969dcd82 [ 33.663355] 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 [ 33.664843] RSP: 002b:00007ffe79ba21e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.665448] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7d969dcd82 [ 33.666015] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7d95e16000 [ 33.666663] RBP: 00007f7d95e16000 R08: 0000000000000009 R09: 0000000000001000 [ 33.667228] R10: 0000000000000812 R11: 0000000000000206 R12: 00005561dcf1eec0 [ 33.667810] R13: 00007ffe79ba2200 R14: 00007ffe79ba2230 R15: 00007ffe79ba2590 [ 33.668409] [ 33.668656] [ 33.668804] Allocated by task 214: [ 33.669125] kasan_save_stack+0x22/0x50 [ 33.669469] kasan_set_track+0x25/0x30 [ 33.669806] __kasan_slab_alloc+0x59/0x70 [ 33.670167] kmem_cache_alloc+0x16b/0x370 [ 33.670517] vm_area_dup+0x20/0x160 [ 33.670834] __split_vma+0x170/0x950 [ 33.671159] split_vma+0xc6/0x110 [ 33.671457] mprotect_fixup+0x8d2/0xb30 [ 33.671785] do_mprotect_pkey+0x87e/0xd40 [ 33.672136] __x64_sys_mprotect+0x78/0xc0 [ 33.672519] do_syscall_64+0x3f/0x90 [ 33.672857] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.673344] [ 33.673495] Freed by task 204: [ 33.673770] kasan_save_stack+0x22/0x50 [ 33.674124] kasan_set_track+0x25/0x30 [ 33.674482] kasan_save_free_info+0x2b/0x50 [ 33.674846] __kasan_slab_free+0x10a/0x190 [ 33.675209] kmem_cache_free+0x10d/0x4d0 [ 33.675556] rcu_core+0x8c8/0x2860 [ 33.675855] __do_softirq+0x1b7/0x7d4 [ 33.676174] [ 33.676310] Last potentially related work creation: [ 33.676726] kasan_save_stack+0x22/0x50 [ 33.677082] __kasan_record_aux_stack+0x8e/0xa0 [ 33.677478] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.677915] remove_vma+0x139/0x170 [ 33.678223] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.678594] do_vmi_munmap+0x1f1/0x2b0 [ 33.678926] __vm_munmap+0x138/0x3a0 [ 33.679250] __x64_sys_munmap+0x59/0x80 [ 33.679590] do_syscall_64+0x3f/0x90 [ 33.679912] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.680347] [ 33.680543] The buggy address belongs to the object at ffff88800f63b488 [ 33.680543] which belongs to the cache vm_area_struct of size 168 [ 33.681547] The buggy address is located 88 bytes inside of [ 33.681547] freed 168-byte region [ffff88800f63b488, ffff88800f63b530) [ 33.682484] [ 33.682633] The buggy address belongs to the physical page: [ 33.683090] page:00000000248aafe6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf63b [ 33.683835] memcg:ffff88800eb3ff01 [ 33.684123] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.684596] page_type: 0xffffffff() [ 33.684911] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.685545] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb3ff01 [ 33.686168] page dumped because: kasan: bad access detected [ 33.686616] [ 33.686764] Memory state around the buggy address: [ 33.687158] ffff88800f63b380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.687737] ffff88800f63b400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 33.688408] >ffff88800f63b480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.689016] ^ [ 33.689526] ffff88800f63b500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 33.690112] ffff88800f63b580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.690675] ================================================================== [ 33.691324] Disabling lock debugging due to kernel taint [ 35.224905] BUG: Bad rss-counter state mm:00000000db8ea5e9 type:MM_FILEPAGES val:33 [ 35.225610] BUG: Bad rss-counter state mm:00000000db8ea5e9 type:MM_ANONPAGES val:22 [ 35.592906] BUG: Bad rss-counter state mm:0000000013997a9b type:MM_FILEPAGES val:33 [ 35.593604] BUG: Bad rss-counter state mm:0000000013997a9b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16025' (ECDSA) to the list of known hosts. 2023/06/20 08:49:19 fuzzer started 2023/06/20 08:49:19 dialing manager at localhost:44161 2023/06/20 08:49:19 checking machine... 2023/06/20 08:49:19 checking revisions... [ 36.120082] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:49:19 testing simple program... [ 36.148270] cgroup: Unknown subsys name 'net' [ 36.177805] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:49:17 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=ffff88806ce09a98 RSI=ffff8880167e7f30 RDI=ffff88806ce09a98 RBP=ffff88806ce09b30 RSP=ffff88806ce09a88 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5311 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff888019d51b40 R15=ffff88800e1e68d0 RIP=ffffffff81130352 RFL=00000202 [-------] 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 00007f1dfa734900 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=00007ffd103f1000 CR3=00000000165e2000 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=000000000000000000ffff0000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 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=00007f425b09ccc0 CR3=000000000c6dc000 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=813e9cf1f11f2596714aadb33f3391d1 XMM02=000000000011d3d0ec2efd57dc4c00df XMM03=0000000000124870a69af77e02dbc59c XMM04=68f0a2212c571ddc00000000000ae988 XMM05=e4cb8bb95a7664b600000000001343d8 XMM06=c291bd5c70af25b90000000000134260 XMM07=e042d86d42eb936e0000000000124af0 XMM08=a69af77e02dbc59c000000000011d430 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000