syzkaller login: [ 33.618484] BUG: Bad rss-counter state mm:00000000c2d8d82a type:MM_FILEPAGES val:33 [ 33.619409] BUG: Bad rss-counter state mm:00000000c2d8d82a type:MM_ANONPAGES val:22 [ 33.784108] ================================================================== [ 33.785258] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.786427] Read of size 8 at addr ffff88800fe343f8 by task sshd/220 [ 33.787513] [ 33.787770] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.788803] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.789936] Call Trace: [ 33.790238] [ 33.790524] dump_stack_lvl+0x91/0xf0 [ 33.791000] print_report+0xcc/0x620 [ 33.791461] ? __virt_addr_valid+0x102/0x340 [ 33.791995] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.792571] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.793176] kasan_report+0xbe/0xf0 [ 33.793631] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.794277] vma_interval_tree_remove+0xc75/0xec0 [ 33.794875] vma_prepare+0xc54/0x11a0 [ 33.795536] __split_vma+0x5af/0x950 [ 33.796142] ? __pfx___split_vma+0x10/0x10 [ 33.796656] ? find_held_lock+0x2c/0x110 [ 33.797185] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.797746] ? lock_is_held_type+0x9f/0x120 [ 33.798326] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.798938] ? mtree_range_walk+0x632/0x900 [ 33.799472] ? mas_walk+0x5c7/0x7c0 [ 33.799947] do_vmi_munmap+0x1f1/0x2b0 [ 33.800444] mmap_region+0x1f9/0x2660 [ 33.800925] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.801424] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.802153] ? __pfx_lock_acquire+0x10/0x10 [ 33.802685] ? __pfx_mmap_region+0x10/0x10 [ 33.803223] ? security_mmap_addr+0x7d/0xa0 [ 33.803752] ? get_unmapped_area+0x1f5/0x3f0 [ 33.804293] do_mmap+0x854/0xf00 [ 33.804724] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.805221] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.805783] ksys_mmap_pgoff+0x3af/0x500 [ 33.806313] do_syscall_64+0x3f/0x90 [ 33.806790] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.807418] RIP: 0033:0x7f64596e6d82 [ 33.807852] 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 [ 33.809862] RSP: 002b:00007fff9fad0a38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.810754] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f64596e6d82 [ 33.811562] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6458b20000 [ 33.812368] RBP: 00007f6458b20000 R08: 0000000000000009 R09: 0000000000001000 [ 33.813177] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fa2cce6f60 [ 33.813997] R13: 00007fff9fad0a50 R14: 00007fff9fad0a80 R15: 00007fff9fad0de0 [ 33.814811] [ 33.815103] [ 33.815308] Allocated by task 213: [ 33.815711] kasan_save_stack+0x22/0x50 [ 33.816201] kasan_set_track+0x25/0x30 [ 33.816665] __kasan_slab_alloc+0x59/0x70 [ 33.817175] kmem_cache_alloc+0x16b/0x370 [ 33.817657] vm_area_dup+0x20/0x160 [ 33.818108] __split_vma+0x170/0x950 [ 33.818567] split_vma+0xc6/0x110 [ 33.819005] mprotect_fixup+0x8d2/0xb30 [ 33.819497] do_mprotect_pkey+0x87e/0xd40 [ 33.820023] __x64_sys_mprotect+0x78/0xc0 [ 33.820539] do_syscall_64+0x3f/0x90 [ 33.821021] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.821671] [ 33.821895] Freed by task 213: [ 33.822316] kasan_save_stack+0x22/0x50 [ 33.822819] kasan_set_track+0x25/0x30 [ 33.823308] kasan_save_free_info+0x2b/0x50 [ 33.823832] __kasan_slab_free+0x10a/0x190 [ 33.824365] kmem_cache_free+0x10d/0x4d0 [ 33.824870] rcu_core+0x8c8/0x2860 [ 33.825328] __do_softirq+0x1b7/0x7d4 [ 33.825802] [ 33.826049] Last potentially related work creation: [ 33.826646] kasan_save_stack+0x22/0x50 [ 33.827160] __kasan_record_aux_stack+0x8e/0xa0 [ 33.827718] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.828357] remove_vma+0x139/0x170 [ 33.828803] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.829367] do_vmi_munmap+0x1f1/0x2b0 [ 33.829849] __vm_munmap+0x138/0x3a0 [ 33.830330] __x64_sys_munmap+0x59/0x80 [ 33.830815] do_syscall_64+0x3f/0x90 [ 33.831285] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.831927] [ 33.832143] The buggy address belongs to the object at ffff88800fe343a0 [ 33.832143] which belongs to the cache vm_area_struct of size 168 [ 33.833609] The buggy address is located 88 bytes inside of [ 33.833609] freed 168-byte region [ffff88800fe343a0, ffff88800fe34448) [ 33.835061] [ 33.835269] The buggy address belongs to the physical page: [ 33.835925] page:00000000608f021f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfe34 [ 33.837009] memcg:ffff88800e8c4201 [ 33.837429] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.838078] page_type: 0xffffffff() [ 33.838531] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.839451] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e8c4201 [ 33.840355] page dumped because: kasan: bad access detected [ 33.841022] [ 33.841235] Memory state around the buggy address: [ 33.841814] ffff88800fe34280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 33.842717] ffff88800fe34300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 33.843564] >ffff88800fe34380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 33.844409] ^ [ 33.845248] ffff88800fe34400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 33.846108] ffff88800fe34480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.846968] ================================================================== [ 33.848107] Disabling lock debugging due to kernel taint [ 35.820864] BUG: Bad rss-counter state mm:000000006a5e3484 type:MM_FILEPAGES val:33 [ 35.821809] BUG: Bad rss-counter state mm:000000006a5e3484 type:MM_ANONPAGES val:22 [ 36.299466] BUG: Bad rss-counter state mm:000000004f694965 type:MM_FILEPAGES val:33 [ 36.300499] BUG: Bad rss-counter state mm:000000004f694965 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17936' (ECDSA) to the list of known hosts. 2023/06/19 17:10:40 fuzzer started 2023/06/19 17:10:41 dialing manager at localhost:44161 2023/06/19 17:10:41 checking machine... 2023/06/19 17:10:41 checking revisions... [ 37.054852] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:10:41 testing simple program... [ 37.098678] cgroup: Unknown subsys name 'net' [ 37.148297] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:10:37 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800fe9d1c0 RSI=ffff88800eec7db0 RDI=ffff88800eec7e00 RBP=ffff88800eec7e00 RSP=ffff88800eec7d38 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88800eec7db0 R13=0000000000000000 R14=ffff88800eec7e20 R15=0000000000000001 RIP=ffffffff81635704 RFL=00000293 [--S-A-C] 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 00007fea9ea57900 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=00007fea9f00f0b0 CR3=0000000016878000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00000000000000000000000000ff0000 XMM02=00000000000000000000000000ff0000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=6c6f636f746f72702f6374652f006563 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 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=00007f7ab635c030 CR3=000000000e09c000 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=042ae371df34c08425496071c0d9e576 XMM02=2c67c8bc2e329bc3000000000011d210 XMM03=fb795ef6d65770560000000000124678 XMM04=850f65cd203c9e5e00000000000ae988 XMM05=19e9129bd510f2350000000000134290 XMM06=4fda316b135da52b0000000000134118 XMM07=e042d86d42eb936e00000000001248f8 XMM08=0d865dc9f4ece8a8000000000011d270 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000