syzkaller login: [ 38.679000] BUG: Bad rss-counter state mm:000000000db2c664 type:MM_FILEPAGES val:33 [ 38.679816] BUG: Bad rss-counter state mm:000000000db2c664 type:MM_ANONPAGES val:22 [ 38.803366] ================================================================== [ 38.804084] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.804818] Read of size 8 at addr ffff88800c646880 by task sshd/219 [ 38.805424] [ 38.805601] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.806249] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.807056] Call Trace: [ 38.807300] [ 38.807520] dump_stack_lvl+0x91/0xf0 [ 38.807894] print_report+0xcc/0x620 [ 38.808259] ? __virt_addr_valid+0x102/0x340 [ 38.808674] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.809158] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.809617] kasan_report+0xbe/0xf0 [ 38.809924] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.810328] vma_interval_tree_remove+0xc75/0xec0 [ 38.810718] vma_prepare+0xc54/0x11a0 [ 38.811034] __split_vma+0x5af/0x950 [ 38.811350] ? __pfx___split_vma+0x10/0x10 [ 38.811699] ? find_held_lock+0x2c/0x110 [ 38.812044] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.812415] ? lock_is_held_type+0x9f/0x120 [ 38.812769] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.813157] ? mtree_range_walk+0x632/0x900 [ 38.813512] ? mas_walk+0x5c7/0x7c0 [ 38.813820] do_vmi_munmap+0x1f1/0x2b0 [ 38.814144] mmap_region+0x1f9/0x2660 [ 38.814454] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.814783] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.815242] ? __pfx_lock_acquire+0x10/0x10 [ 38.815589] ? __pfx_mmap_region+0x10/0x10 [ 38.815930] ? security_mmap_addr+0x7d/0xa0 [ 38.816270] ? get_unmapped_area+0x1f5/0x3f0 [ 38.816624] do_mmap+0x854/0xf00 [ 38.816905] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.817224] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.817641] ksys_mmap_pgoff+0x3af/0x500 [ 38.817984] do_syscall_64+0x3f/0x90 [ 38.818311] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.818767] RIP: 0033:0x7f9245c7bd82 [ 38.819084] 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 [ 38.820515] RSP: 002b:00007fff9d912558 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.821109] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9245c7bd82 [ 38.821676] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f92450b5000 [ 38.822241] RBP: 00007f92450b5000 R08: 0000000000000009 R09: 0000000000001000 [ 38.822803] R10: 0000000000000812 R11: 0000000000000206 R12: 000056282313bec0 [ 38.823358] R13: 00007fff9d912570 R14: 00007fff9d9125a0 R15: 00007fff9d912900 [ 38.823934] [ 38.824125] [ 38.824263] Allocated by task 212: [ 38.824544] kasan_save_stack+0x22/0x50 [ 38.824871] kasan_set_track+0x25/0x30 [ 38.825195] __kasan_slab_alloc+0x59/0x70 [ 38.825538] kmem_cache_alloc+0x16b/0x370 [ 38.825893] vm_area_dup+0x20/0x160 [ 38.826191] __split_vma+0x170/0x950 [ 38.826494] split_vma+0xc6/0x110 [ 38.826773] mprotect_fixup+0x8d2/0xb30 [ 38.827099] do_mprotect_pkey+0x87e/0xd40 [ 38.827434] __x64_sys_mprotect+0x78/0xc0 [ 38.827769] do_syscall_64+0x3f/0x90 [ 38.828077] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.828537] [ 38.828689] Freed by task 13: [ 38.828951] kasan_save_stack+0x22/0x50 [ 38.829294] kasan_set_track+0x25/0x30 [ 38.829632] kasan_save_free_info+0x2b/0x50 [ 38.829999] __kasan_slab_free+0x10a/0x190 [ 38.830358] kmem_cache_free+0x10d/0x4d0 [ 38.830703] rcu_core+0x8c8/0x2860 [ 38.831012] __do_softirq+0x1b7/0x7d4 [ 38.831346] [ 38.831494] Last potentially related work creation: [ 38.831896] kasan_save_stack+0x22/0x50 [ 38.832239] __kasan_record_aux_stack+0x8e/0xa0 [ 38.832639] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.833072] remove_vma+0x139/0x170 [ 38.833386] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.833769] do_vmi_munmap+0x1f1/0x2b0 [ 38.834099] __vm_munmap+0x138/0x3a0 [ 38.834414] __x64_sys_munmap+0x59/0x80 [ 38.834756] do_syscall_64+0x3f/0x90 [ 38.835074] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.835509] [ 38.835652] The buggy address belongs to the object at ffff88800c646828 [ 38.835652] which belongs to the cache vm_area_struct of size 168 [ 38.836648] The buggy address is located 88 bytes inside of [ 38.836648] freed 168-byte region [ffff88800c646828, ffff88800c6468d0) [ 38.837619] [ 38.837762] The buggy address belongs to the physical page: [ 38.838210] page:000000004f076276 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc646 [ 38.838945] memcg:ffff88800c530901 [ 38.839229] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.839667] page_type: 0xffffffff() [ 38.839968] raw: 0100000000000200 ffff8880087a0c80 ffffea00001adb00 dead000000000002 [ 38.840630] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c530901 [ 38.841204] page dumped because: kasan: bad access detected [ 38.841682] [ 38.841830] Memory state around the buggy address: [ 38.842210] ffff88800c646780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.842778] ffff88800c646800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.843346] >ffff88800c646880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.843919] ^ [ 38.844190] ffff88800c646900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.844766] ffff88800c646980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 38.845333] ================================================================== [ 38.846108] Disabling lock debugging due to kernel taint [ 40.593865] BUG: Bad rss-counter state mm:000000006eb188fa type:MM_FILEPAGES val:33 [ 40.594886] BUG: Bad rss-counter state mm:000000006eb188fa type:MM_ANONPAGES val:22 [ 41.172761] BUG: Bad rss-counter state mm:00000000aa982898 type:MM_FILEPAGES val:33 [ 41.173755] BUG: Bad rss-counter state mm:00000000aa982898 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57530' (ECDSA) to the list of known hosts. 2023/06/20 11:23:31 fuzzer started 2023/06/20 11:23:31 dialing manager at localhost:36067 2023/06/20 11:23:31 checking machine... 2023/06/20 11:23:31 checking revisions... [ 41.826330] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:23:31 testing simple program... [ 41.885664] cgroup: Unknown subsys name 'net' [ 41.951493] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:23:31 Registers: info registers vcpu 0 RAX=00007eff040b8060 RBX=0000000000000400 RCX=0000000000000400 RDX=000055bbd2716770 RSI=000055bbd2716740 RDI=000055bbd2705ce0 RBP=0000000000000400 RSP=00007ffc80193190 R8 =00007eff035166f8 R9 =00007eff03ac8be0 R10=000000000000006e R11=0000000000000000 R12=000055bbd2716740 R13=000055bbd2705ce0 R14=000055bbd2716770 R15=00007eff035166f8 RIP=00007eff03508772 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007eff03516900 00000000 00000000 GS =0000 0000000000000000 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=00007eff03ace0b0 CR3=000000001bc62000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f1a43c9c3f0 CR3=000000000caf2000 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=6916827943b4f5bade47678a97f4cc10 XMM02=ec2efd57dc4c00df000000000011b608 XMM03=b53dfa617604c324000000000011b6d8 XMM04=4a12eeb25e4be4e400000000000ae988 XMM05=dfcdbad4f1609c370000000000131b28 XMM06=287d0d665f0b66ca0000000000130d00 XMM07=e042d86d42eb936e0000000000122310 XMM08=b53dfa617604c324000000000011b6d8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000