syzkaller login: [ 39.615400] BUG: Bad rss-counter state mm:000000004f4ed975 type:MM_FILEPAGES val:33 [ 39.616402] BUG: Bad rss-counter state mm:000000004f4ed975 type:MM_ANONPAGES val:22 [ 39.796328] ================================================================== [ 39.797037] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.797769] Read of size 8 at addr ffff888016a19310 by task sshd/227 [ 39.798358] [ 39.798529] CPU: 0 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.799197] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.800060] Call Trace: [ 39.800306] [ 39.800525] dump_stack_lvl+0x91/0xf0 [ 39.800904] print_report+0xcc/0x620 [ 39.801274] ? __virt_addr_valid+0x102/0x340 [ 39.801704] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.802177] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.802645] kasan_report+0xbe/0xf0 [ 39.803011] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.803489] vma_interval_tree_remove+0xc75/0xec0 [ 39.803952] vma_prepare+0xc54/0x11a0 [ 39.804322] __split_vma+0x5af/0x950 [ 39.804685] ? __pfx___split_vma+0x10/0x10 [ 39.805088] ? find_held_lock+0x2c/0x110 [ 39.805485] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.805922] ? lock_is_held_type+0x9f/0x120 [ 39.806335] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.806808] ? mtree_range_walk+0x632/0x900 [ 39.807250] ? mas_walk+0x5c7/0x7c0 [ 39.807640] do_vmi_munmap+0x1f1/0x2b0 [ 39.808020] mmap_region+0x1f9/0x2660 [ 39.808394] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.808791] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.809344] ? __pfx_lock_acquire+0x10/0x10 [ 39.809768] ? __pfx_mmap_region+0x10/0x10 [ 39.810178] ? security_mmap_addr+0x7d/0xa0 [ 39.810590] ? get_unmapped_area+0x1f5/0x3f0 [ 39.811015] do_mmap+0x854/0xf00 [ 39.811360] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.811742] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.812176] ksys_mmap_pgoff+0x3af/0x500 [ 39.812572] do_syscall_64+0x3f/0x90 [ 39.812946] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.813445] RIP: 0033:0x7f7b2ca19d82 [ 39.813802] 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 [ 39.815444] RSP: 002b:00007ffe36d7d878 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.816145] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7b2ca19d82 [ 39.816803] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7b2be53000 [ 39.817455] RBP: 00007f7b2be53000 R08: 0000000000000009 R09: 0000000000001000 [ 39.818103] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d13d1b7d90 [ 39.818767] R13: 00007ffe36d7d890 R14: 00007ffe36d7d8c0 R15: 00007ffe36d7dc20 [ 39.819440] [ 39.819666] [ 39.819832] Allocated by task 220: [ 39.820162] kasan_save_stack+0x22/0x50 [ 39.820549] kasan_set_track+0x25/0x30 [ 39.820933] __kasan_slab_alloc+0x59/0x70 [ 39.821337] kmem_cache_alloc+0x16b/0x370 [ 39.821734] vm_area_dup+0x20/0x160 [ 39.822102] __split_vma+0x170/0x950 [ 39.822459] split_vma+0xc6/0x110 [ 39.822797] mprotect_fixup+0x8d2/0xb30 [ 39.823185] do_mprotect_pkey+0x87e/0xd40 [ 39.823596] __x64_sys_mprotect+0x78/0xc0 [ 39.824001] do_syscall_64+0x3f/0x90 [ 39.824369] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.824872] [ 39.825041] Freed by task 206: [ 39.825348] kasan_save_stack+0x22/0x50 [ 39.825741] kasan_set_track+0x25/0x30 [ 39.826129] kasan_save_free_info+0x2b/0x50 [ 39.826543] __kasan_slab_free+0x10a/0x190 [ 39.826964] kmem_cache_free+0x10d/0x4d0 [ 39.827369] rcu_core+0x8c8/0x2860 [ 39.827715] __do_softirq+0x1b7/0x7d4 [ 39.828088] [ 39.828264] Last potentially related work creation: [ 39.828730] kasan_save_stack+0x22/0x50 [ 39.829122] __kasan_record_aux_stack+0x8e/0xa0 [ 39.829575] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.830075] remove_vma+0x139/0x170 [ 39.830426] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.830862] do_vmi_munmap+0x1f1/0x2b0 [ 39.831243] __vm_munmap+0x138/0x3a0 [ 39.831623] __x64_sys_munmap+0x59/0x80 [ 39.832004] do_syscall_64+0x3f/0x90 [ 39.832370] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.832862] [ 39.833032] The buggy address belongs to the object at ffff888016a192b8 [ 39.833032] which belongs to the cache vm_area_struct of size 168 [ 39.834183] The buggy address is located 88 bytes inside of [ 39.834183] freed 168-byte region [ffff888016a192b8, ffff888016a19360) [ 39.835275] [ 39.835441] The buggy address belongs to the physical page: [ 39.835958] page:00000000baefd3e7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16a19 [ 39.836806] memcg:ffff888016f75801 [ 39.837138] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.837643] page_type: 0xffffffff() [ 39.837996] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 39.838716] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016f75801 [ 39.839428] page dumped because: kasan: bad access detected [ 39.839942] [ 39.840104] Memory state around the buggy address: [ 39.840554] ffff888016a19200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 39.841220] ffff888016a19280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 39.841886] >ffff888016a19300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 39.842543] ^ [ 39.842905] ffff888016a19380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 39.843589] ffff888016a19400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 39.844255] ================================================================== [ 39.844998] Disabling lock debugging due to kernel taint [ 41.656935] BUG: Bad rss-counter state mm:000000001108ec71 type:MM_FILEPAGES val:33 [ 41.657584] BUG: Bad rss-counter state mm:000000001108ec71 type:MM_ANONPAGES val:22 [ 42.141651] BUG: Bad rss-counter state mm:00000000c31e3c16 type:MM_FILEPAGES val:33 [ 42.142722] BUG: Bad rss-counter state mm:00000000c31e3c16 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12981' (ECDSA) to the list of known hosts. 2023/06/19 11:09:59 fuzzer started 2023/06/19 11:09:59 dialing manager at localhost:44161 2023/06/19 11:10:00 checking machine... 2023/06/19 11:10:00 checking revisions... [ 42.847013] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:10:00 testing simple program... [ 42.892084] cgroup: Unknown subsys name 'net' [ 42.972450] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:09:58 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fa12202f3f0 CR3=0000000016892000 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=2039353a39303a3131203931206e754a XMM01=73732878696e755f6d6170203a5d3633 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3633325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a39303a3131203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800dadd940 RCX=ffff88800dadd000 RDX=0000000000000080 RSI=ffff88800dadd850 RDI=ffff88800844f780 RBP=0000000000000000 RSP=ffff88806cf09dc0 R8 =0000000000000130 R9 =0000000000000000 R10=0000000000000008 R11=00000000000b6c88 R12=ffff88800844f780 R13=ffffea0000308380 R14=ffffffff813782a8 R15=ffff888016f5a080 RIP=ffffffff8180ee70 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007feba3a32900 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=00007feba45a431c CR3=000000000f1c4000 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=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