syzkaller login: [ 30.588672] BUG: Bad rss-counter state mm:000000005ca22b7b type:MM_FILEPAGES val:33 [ 30.589853] BUG: Bad rss-counter state mm:000000005ca22b7b type:MM_ANONPAGES val:22 [ 30.630994] ================================================================== [ 30.631896] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.632931] Read of size 8 at addr ffff88800c4cf058 by task sshd/220 [ 30.633720] [ 30.633942] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.634810] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.635816] Call Trace: [ 30.636137] [ 30.636427] dump_stack_lvl+0x91/0xf0 [ 30.636926] print_report+0xcc/0x620 [ 30.637422] ? __virt_addr_valid+0x102/0x340 [ 30.637982] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.638606] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.639239] kasan_report+0xbe/0xf0 [ 30.639727] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.640351] vma_interval_tree_remove+0xc75/0xec0 [ 30.640971] vma_prepare+0xc54/0x11a0 [ 30.641447] __split_vma+0x5af/0x950 [ 30.641918] ? __pfx___split_vma+0x10/0x10 [ 30.642451] ? find_held_lock+0x2c/0x110 [ 30.642985] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.643559] ? lock_is_held_type+0x9f/0x120 [ 30.644096] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.644716] ? mtree_range_walk+0x632/0x900 [ 30.645266] ? mas_walk+0x5c7/0x7c0 [ 30.645741] do_vmi_munmap+0x1f1/0x2b0 [ 30.646232] mmap_region+0x1f9/0x2660 [ 30.646713] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.647241] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.647973] ? __pfx_lock_acquire+0x10/0x10 [ 30.648515] ? __pfx_mmap_region+0x10/0x10 [ 30.649047] ? security_mmap_addr+0x7d/0xa0 [ 30.649575] ? get_unmapped_area+0x1f5/0x3f0 [ 30.650130] do_mmap+0x854/0xf00 [ 30.650565] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.651070] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.651644] ksys_mmap_pgoff+0x3af/0x500 [ 30.652171] do_syscall_64+0x3f/0x90 [ 30.652677] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.653322] RIP: 0033:0x7f1eafbd2d82 [ 30.653776] 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 [ 30.655968] RSP: 002b:00007ffdfec4ddb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.656885] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1eafbd2d82 [ 30.657751] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1eaf00c000 [ 30.658609] RBP: 00007f1eaf00c000 R08: 0000000000000009 R09: 0000000000001000 [ 30.659505] R10: 0000000000000812 R11: 0000000000000206 R12: 00005619f5763b20 [ 30.660360] R13: 00007ffdfec4ddd0 R14: 00007ffdfec4de00 R15: 00007ffdfec4e160 [ 30.661249] [ 30.661540] [ 30.661754] Allocated by task 213: [ 30.662182] kasan_save_stack+0x22/0x50 [ 30.662698] kasan_set_track+0x25/0x30 [ 30.663209] __kasan_slab_alloc+0x59/0x70 [ 30.663736] kmem_cache_alloc+0x16b/0x370 [ 30.664252] vm_area_dup+0x20/0x160 [ 30.664708] __split_vma+0x170/0x950 [ 30.665176] split_vma+0xc6/0x110 [ 30.665633] mprotect_fixup+0x8d2/0xb30 [ 30.666136] do_mprotect_pkey+0x87e/0xd40 [ 30.666663] __x64_sys_mprotect+0x78/0xc0 [ 30.667207] do_syscall_64+0x3f/0x90 [ 30.667695] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.668353] [ 30.668577] Freed by task 213: [ 30.668978] kasan_save_stack+0x22/0x50 [ 30.669498] kasan_set_track+0x25/0x30 [ 30.670010] kasan_save_free_info+0x2b/0x50 [ 30.670555] __kasan_slab_free+0x10a/0x190 [ 30.671118] kmem_cache_free+0x10d/0x4d0 [ 30.671650] rcu_core+0x8c8/0x2860 [ 30.672115] __do_softirq+0x1b7/0x7d4 [ 30.672612] [ 30.672833] Last potentially related work creation: [ 30.673443] kasan_save_stack+0x22/0x50 [ 30.673959] __kasan_record_aux_stack+0x8e/0xa0 [ 30.674555] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.675247] remove_vma+0x139/0x170 [ 30.675719] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.676290] do_vmi_munmap+0x1f1/0x2b0 [ 30.676785] __vm_munmap+0x138/0x3a0 [ 30.677276] __x64_sys_munmap+0x59/0x80 [ 30.677784] do_syscall_64+0x3f/0x90 [ 30.678283] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.678960] [ 30.679183] The buggy address belongs to the object at ffff88800c4cf000 [ 30.679183] which belongs to the cache vm_area_struct of size 168 [ 30.680706] The buggy address is located 88 bytes inside of [ 30.680706] freed 168-byte region [ffff88800c4cf000, ffff88800c4cf0a8) [ 30.682175] [ 30.682405] The buggy address belongs to the physical page: [ 30.683107] page:00000000bb7b2968 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800c4cfe80 pfn:0xc4cf [ 30.684398] memcg:ffff88800c738001 [ 30.684831] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.685521] page_type: 0xffffffff() [ 30.685998] raw: 0100000000000200 ffff8880087a0c80 ffffea0000624940 dead000000000002 [ 30.686990] raw: ffff88800c4cfe80 0000000080110009 00000001ffffffff ffff88800c738001 [ 30.687954] page dumped because: kasan: bad access detected [ 30.688661] [ 30.688887] Memory state around the buggy address: [ 30.689497] ffff88800c4cef00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.690404] ffff88800c4cef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.691324] >ffff88800c4cf000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.692221] ^ [ 30.693000] ffff88800c4cf080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.693901] ffff88800c4cf100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.694794] ================================================================== [ 30.696137] Disabling lock debugging due to kernel taint [ 32.583386] BUG: Bad rss-counter state mm:000000004c9fb528 type:MM_FILEPAGES val:33 [ 32.584998] BUG: Bad rss-counter state mm:000000004c9fb528 type:MM_ANONPAGES val:22 [ 33.078628] BUG: Bad rss-counter state mm:000000007ac9b32b type:MM_FILEPAGES val:33 [ 33.079720] BUG: Bad rss-counter state mm:000000007ac9b32b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37982' (ECDSA) to the list of known hosts. 2023/06/20 23:57:22 fuzzer started 2023/06/20 23:57:22 dialing manager at localhost:36067 2023/06/20 23:57:22 checking machine... 2023/06/20 23:57:22 checking revisions... [ 33.827022] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:57:22 testing simple program... [ 33.884052] cgroup: Unknown subsys name 'net' [ 33.922216] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:57:22 Registers: info registers vcpu 0 RAX=1ffff11001bde91d RBX=ffff88800def48b8 RCX=1ffff11002e65c3a RDX=dffffc0000000000 RSI=ffff888019bd7450 RDI=ffff88800def48e8 RBP=ffff88800f3b6d88 RSP=ffff888006aef5f8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff888019bd7318 R13=0000000000000000 R14=ffff88801646f2a8 R15=ffff88801646f260 RIP=ffffffff8184767e RFL=00000046 [---Z-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 00007f126f9ad900 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=00007f126ee0c870 CR3=000000000ba72000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=291365f6a94aeba100000000000ae988 XMM05=c9f8212af4b191d60000000000132490 XMM06=4fda316b135da52b0000000000131280 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=fffffbfff0ff2fc9 RBX=ffff888009ad7490 RCX=ffffffff83ab193d RDX=fffffbfff0ff2fc9 RSI=0000000000000004 RDI=ffffffff87f97e40 RBP=fffffbfff0ff2fc8 RSP=ffff88800dbdf4f0 R8 =0000000000000000 R9 =fffffbfff0ff2fc8 R10=ffffffff87f97e43 R11=000008fa000008fa R12=0000000000000000 R13=0000000000000092 R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff8180f12f RFL=00000246 [---Z-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 00007f7d019b4900 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=00007fffc4ae6000 CR3=0000000008c6e000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000