syzkaller login: [ 30.651464] BUG: Bad rss-counter state mm:00000000ca1d39fe type:MM_FILEPAGES val:33 [ 30.652667] BUG: Bad rss-counter state mm:00000000ca1d39fe type:MM_ANONPAGES val:22 [ 30.809596] ================================================================== [ 30.810323] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.811200] Read of size 8 at addr ffff88800e97ec20 by task sshd/220 [ 30.811791] [ 30.811955] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.812848] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.813693] Call Trace: [ 30.813995] [ 30.814272] dump_stack_lvl+0x91/0xf0 [ 30.814692] print_report+0xcc/0x620 [ 30.815063] ? __virt_addr_valid+0x102/0x340 [ 30.815536] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.816113] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.816593] kasan_report+0xbe/0xf0 [ 30.816967] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.817553] vma_interval_tree_remove+0xc75/0xec0 [ 30.818017] vma_prepare+0xc54/0x11a0 [ 30.818383] __split_vma+0x5af/0x950 [ 30.818809] ? __pfx___split_vma+0x10/0x10 [ 30.819289] ? find_held_lock+0x2c/0x110 [ 30.819693] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.820149] ? lock_is_held_type+0x9f/0x120 [ 30.820655] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.821212] ? mtree_range_walk+0x632/0x900 [ 30.821639] ? mas_walk+0x5c7/0x7c0 [ 30.822019] do_vmi_munmap+0x1f1/0x2b0 [ 30.822477] mmap_region+0x1f9/0x2660 [ 30.822947] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.823344] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.823915] ? __pfx_lock_acquire+0x10/0x10 [ 30.824420] ? __pfx_mmap_region+0x10/0x10 [ 30.824853] ? security_mmap_addr+0x7d/0xa0 [ 30.825272] ? get_unmapped_area+0x1f5/0x3f0 [ 30.825742] do_mmap+0x854/0xf00 [ 30.826168] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.826564] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.827007] ksys_mmap_pgoff+0x3af/0x500 [ 30.827450] do_syscall_64+0x3f/0x90 [ 30.827908] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.828411] RIP: 0033:0x7febecb41d82 [ 30.828761] 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 [ 30.830602] RSP: 002b:00007fffa6f6ddf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.831396] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007febecb41d82 [ 30.832058] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007febebf7b000 [ 30.832808] RBP: 00007febebf7b000 R08: 0000000000000009 R09: 0000000000001000 [ 30.833477] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a89bcb1ec0 [ 30.834209] R13: 00007fffa6f6de10 R14: 00007fffa6f6de40 R15: 00007fffa6f6e1a0 [ 30.834890] [ 30.835126] [ 30.835327] Allocated by task 213: [ 30.835736] kasan_save_stack+0x22/0x50 [ 30.836190] kasan_set_track+0x25/0x30 [ 30.836570] __kasan_slab_alloc+0x59/0x70 [ 30.836974] kmem_cache_alloc+0x16b/0x370 [ 30.837452] vm_area_dup+0x20/0x160 [ 30.837899] __split_vma+0x170/0x950 [ 30.838283] split_vma+0xc6/0x110 [ 30.838647] mprotect_fixup+0x8d2/0xb30 [ 30.839055] do_mprotect_pkey+0x87e/0xd40 [ 30.839541] __x64_sys_mprotect+0x78/0xc0 [ 30.840011] do_syscall_64+0x3f/0x90 [ 30.840377] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.840887] [ 30.841091] Freed by task 0: [ 30.841457] kasan_save_stack+0x22/0x50 [ 30.841899] kasan_set_track+0x25/0x30 [ 30.842285] kasan_save_free_info+0x2b/0x50 [ 30.842730] __kasan_slab_free+0x10a/0x190 [ 30.843246] kmem_cache_free+0x10d/0x4d0 [ 30.843681] rcu_core+0x8c8/0x2860 [ 30.844025] __do_softirq+0x1b7/0x7d4 [ 30.844392] [ 30.844584] Last potentially related work creation: [ 30.845161] kasan_save_stack+0x22/0x50 [ 30.845565] __kasan_record_aux_stack+0x8e/0xa0 [ 30.846021] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.846585] remove_vma+0x139/0x170 [ 30.847036] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.847480] do_vmi_munmap+0x1f1/0x2b0 [ 30.847854] __vm_munmap+0x138/0x3a0 [ 30.848256] __x64_sys_munmap+0x59/0x80 [ 30.848739] do_syscall_64+0x3f/0x90 [ 30.849111] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.849613] [ 30.849799] Second to last potentially related work creation: [ 30.850457] kasan_save_stack+0x22/0x50 [ 30.850878] __kasan_record_aux_stack+0x8e/0xa0 [ 30.851327] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.851897] remove_vma+0x139/0x170 [ 30.852267] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.852699] do_vmi_munmap+0x1f1/0x2b0 [ 30.853104] mmap_region+0x1f9/0x2660 [ 30.853517] do_mmap+0x854/0xf00 [ 30.853857] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.854300] ksys_mmap_pgoff+0x3af/0x500 [ 30.854792] do_syscall_64+0x3f/0x90 [ 30.855226] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.855725] [ 30.855896] The buggy address belongs to the object at ffff88800e97ebc8 [ 30.855896] which belongs to the cache vm_area_struct of size 168 [ 30.857184] The buggy address is located 88 bytes inside of [ 30.857184] freed 168-byte region [ffff88800e97ebc8, ffff88800e97ec70) [ 30.858388] [ 30.858603] The buggy address belongs to the physical page: [ 30.859114] page:000000000ca5c254 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800e97ed98 pfn:0xe97e [ 30.860171] memcg:ffff88800e9f2b01 [ 30.860536] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.861079] page_type: 0xffffffff() [ 30.861454] raw: 0100000000000200 ffff88800879fc80 ffffea000039fd80 dead000000000009 [ 30.862280] raw: ffff88800e97ed98 000000008011000d 00000001ffffffff ffff88800e9f2b01 [ 30.863003] page dumped because: kasan: bad access detected [ 30.863630] [ 30.863822] Memory state around the buggy address: [ 30.864280] ffff88800e97eb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.864999] ffff88800e97eb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.865763] >ffff88800e97ec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.866424] ^ [ 30.866926] ffff88800e97ec80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.867684] ffff88800e97ed00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.868377] ================================================================== [ 30.869332] Disabling lock debugging due to kernel taint [ 33.554804] BUG: Bad rss-counter state mm:000000003291ccba type:MM_FILEPAGES val:33 [ 33.555704] BUG: Bad rss-counter state mm:000000003291ccba type:MM_ANONPAGES val:22 [ 34.038023] BUG: Bad rss-counter state mm:0000000086857d34 type:MM_FILEPAGES val:33 [ 34.039041] BUG: Bad rss-counter state mm:0000000086857d34 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46827' (ECDSA) to the list of known hosts. 2023/06/19 19:08:00 fuzzer started 2023/06/19 19:08:00 dialing manager at localhost:44161 2023/06/19 19:08:00 checking machine... 2023/06/19 19:08:00 checking revisions... [ 34.756202] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:08:01 testing simple program... [ 34.815269] cgroup: Unknown subsys name 'net' [ 34.914231] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:08:00 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800edfb81c RCX=0000000000000000 RDX=ffff8880147c8000 RSI=ffffffff8449ef93 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff8880147c7cc0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=ffff88801023b7c0 R14=0000000000000000 R15=00007fb08b3f3fff RIP=ffffffff814c081b 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fb08ae13900 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=00007fb08a25d1e0 CR3=000000000c68e000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=13d6d592d82f28e200000000000ae988 XMM05=522d7db189a9a30e0000000000137038 XMM06=566e311825d6d9ad0000000000135dd8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000000000fdc6 RBX=0000000000000001 RCX=ffffffff813782a7 RDX=0000000000000003 RSI=ffffffff860d1670 RDI=ffffffff85db8aec RBP=ffff888008e579d0 RSP=ffff888008e578f8 R8 =ffffffff860d1670 R9 =ffff888008e579b8 R10=0000000000038001 R11=000000000000fdc6 R12=ffff888008e579d8 R13=ffff888008e579c0 R14=ffff888008e579b9 R15=ffff888008e57978 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 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=00007f97455da0b0 CR3=000000000eb8c000 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=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