syzkaller login: [ 38.797611] BUG: Bad rss-counter state mm:00000000ad7b2d74 type:MM_FILEPAGES val:33 [ 38.798771] BUG: Bad rss-counter state mm:00000000ad7b2d74 type:MM_ANONPAGES val:22 [ 38.836957] ================================================================== [ 38.837981] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.839116] Read of size 8 at addr ffff88800d6db058 by task sshd/218 [ 38.839976] [ 38.840314] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.841236] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.842387] Call Trace: [ 38.842709] <TASK> [ 38.843116] dump_stack_lvl+0x91/0xf0 [ 38.843612] print_report+0xcc/0x620 [ 38.844139] ? __virt_addr_valid+0x102/0x340 [ 38.844700] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.845442] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.846078] kasan_report+0xbe/0xf0 [ 38.846552] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.847169] vma_interval_tree_remove+0xc75/0xec0 [ 38.847766] vma_prepare+0xc54/0x11a0 [ 38.848241] __split_vma+0x5af/0x950 [ 38.848724] ? __pfx___split_vma+0x10/0x10 [ 38.849249] ? find_held_lock+0x2c/0x110 [ 38.849769] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.850333] ? lock_is_held_type+0x9f/0x120 [ 38.850869] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.851468] ? mtree_range_walk+0x632/0x900 [ 38.852018] ? mas_walk+0x5c7/0x7c0 [ 38.852509] do_vmi_munmap+0x1f1/0x2b0 [ 38.852999] mmap_region+0x1f9/0x2660 [ 38.853473] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.853980] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.854700] ? __pfx_lock_acquire+0x10/0x10 [ 38.855234] ? __pfx_mmap_region+0x10/0x10 [ 38.855761] ? security_mmap_addr+0x7d/0xa0 [ 38.856293] ? get_unmapped_area+0x1f5/0x3f0 [ 38.856839] do_mmap+0x854/0xf00 [ 38.857270] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.857772] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.858328] ksys_mmap_pgoff+0x3af/0x500 [ 38.858831] do_syscall_64+0x3f/0x90 [ 38.859311] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.859964] RIP: 0033:0x7f07b214ad82 [ 38.860442] 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 [ 38.862554] RSP: 002b:00007ffcb1143d08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.863456] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f07b214ad82 [ 38.864304] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f07b1584000 [ 38.865152] RBP: 00007f07b1584000 R08: 0000000000000009 R09: 0000000000001000 [ 38.865990] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556ac5387ec0 [ 38.866831] R13: 00007ffcb1143d20 R14: 00007ffcb1143d50 R15: 00007ffcb11440b0 [ 38.867678] </TASK> [ 38.867966] [ 38.868179] Allocated by task 211: [ 38.868626] kasan_save_stack+0x22/0x50 [ 38.869128] kasan_set_track+0x25/0x30 [ 38.869618] __kasan_slab_alloc+0x59/0x70 [ 38.870133] kmem_cache_alloc+0x16b/0x370 [ 38.870640] vm_area_dup+0x20/0x160 [ 38.871096] __split_vma+0x170/0x950 [ 38.871555] split_vma+0xc6/0x110 [ 38.871991] mprotect_fixup+0x8d2/0xb30 [ 38.872499] do_mprotect_pkey+0x87e/0xd40 [ 38.873014] __x64_sys_mprotect+0x78/0xc0 [ 38.873528] do_syscall_64+0x3f/0x90 [ 38.874003] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.874639] [ 38.874851] Freed by task 211: [ 38.875238] kasan_save_stack+0x22/0x50 [ 38.875740] kasan_set_track+0x25/0x30 [ 38.876232] kasan_save_free_info+0x2b/0x50 [ 38.876782] __kasan_slab_free+0x10a/0x190 [ 38.877312] kmem_cache_free+0x10d/0x4d0 [ 38.877816] rcu_core+0x8c8/0x2860 [ 38.878256] __do_softirq+0x1b7/0x7d4 [ 38.878730] [ 38.878942] Last potentially related work creation: [ 38.879528] kasan_save_stack+0x22/0x50 [ 38.880031] __kasan_record_aux_stack+0x8e/0xa0 [ 38.880612] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.881253] remove_vma+0x139/0x170 [ 38.881703] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.882331] do_vmi_munmap+0x1f1/0x2b0 [ 38.882816] __vm_munmap+0x138/0x3a0 [ 38.883278] __x64_sys_munmap+0x59/0x80 [ 38.883772] do_syscall_64+0x3f/0x90 [ 38.884245] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.884913] [ 38.885128] Second to last potentially related work creation: [ 38.885809] kasan_save_stack+0x22/0x50 [ 38.886307] __kasan_record_aux_stack+0x8e/0xa0 [ 38.886873] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.887519] remove_vma+0x139/0x170 [ 38.887965] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.888527] do_vmi_munmap+0x1f1/0x2b0 [ 38.889008] mmap_region+0x1f9/0x2660 [ 38.889482] do_mmap+0x854/0xf00 [ 38.889908] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.890391] ksys_mmap_pgoff+0x3af/0x500 [ 38.890890] do_syscall_64+0x3f/0x90 [ 38.891356] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.891994] [ 38.892208] The buggy address belongs to the object at ffff88800d6db000 [ 38.892208] which belongs to the cache vm_area_struct of size 168 [ 38.893671] The buggy address is located 88 bytes inside of [ 38.893671] freed 168-byte region [ffff88800d6db000, ffff88800d6db0a8) [ 38.895072] [ 38.895288] The buggy address belongs to the physical page: [ 38.895944] page:000000008f8306a6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd6db [ 38.897047] memcg:ffff88800f16b301 [ 38.897477] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.898119] page_type: 0xffffffff() [ 38.898567] raw: 0100000000000200 ffff8880087a0c80 ffffea00003932c0 dead00000000000a [ 38.899481] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f16b301 [ 38.900387] page dumped because: kasan: bad access detected [ 38.901039] [ 38.901252] Memory state around the buggy address: [ 38.901826] ffff88800d6daf00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 38.902674] ffff88800d6daf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.903520] >ffff88800d6db000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.904374] ^ [ 38.905095] ffff88800d6db080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 38.905954] ffff88800d6db100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.906809] ================================================================== [ 38.907746] Disabling lock debugging due to kernel taint [ 40.899367] BUG: Bad rss-counter state mm:0000000071ac0f11 type:MM_FILEPAGES val:33 [ 40.900609] BUG: Bad rss-counter state mm:0000000071ac0f11 type:MM_ANONPAGES val:22 [ 41.307642] BUG: Bad rss-counter state mm:0000000045d540d7 type:MM_FILEPAGES val:33 [ 41.308897] BUG: Bad rss-counter state mm:0000000045d540d7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19294' (ECDSA) to the list of known hosts. 2023/06/21 07:09:42 fuzzer started 2023/06/21 07:09:42 dialing manager at localhost:36067 2023/06/21 07:09:42 checking machine... 2023/06/21 07:09:42 checking revisions... [ 42.025117] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:09:42 testing simple program... [ 42.075671] cgroup: Unknown subsys name 'net' [ 42.118978] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:09:42 Registers: info registers vcpu 0 RAX=0100000000010200 RBX=ffff88801937d500 RCX=ffffea000064de01 RDX=ffffea000064de00 RSI=0000000000000004 RDI=ffff88806ce40140 RBP=0000000000000000 RSP=ffff88800e81fc68 R8 =ffff88801937d500 R9 =ffffed100d9c8028 R10=ffff88806ce40143 R11=0000000000070006 R12=dffffc0000000000 R13=ffff88800e81fca8 R14=0000000000000000 R15=ffff88801937e600 RIP=ffffffff818103a7 RFL=00000202 [-------] 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 00007f08dde4e900 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=00007f08de403650 CR3=000000000ca9e000 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=0000000000000001 RBX=0000000000000001 RCX=ffffffff864bbb54 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff864bbb58 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b6a61 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff81130b06 RFL=00000297 [--S-APC] 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 00007f7ae13ca900 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=00007f7ae08e9020 CR3=000000000d69e000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=6823ac157ed13bea00000000000ae988 XMM05=ac6ce856bdf9d9d60000000000133da8 XMM06=bdf2e299e47b49d50000000000132828 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000