syzkaller login: [ 36.371026] BUG: Bad rss-counter state mm:000000008bb01c7e type:MM_FILEPAGES val:33 [ 36.372281] BUG: Bad rss-counter state mm:000000008bb01c7e type:MM_ANONPAGES val:22 [ 36.413060] ================================================================== [ 36.414179] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.415240] Read of size 8 at addr ffff8880145b2310 by task sshd/219 [ 36.416094] [ 36.416337] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.417286] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.418357] Call Trace: [ 36.418701] [ 36.419009] dump_stack_lvl+0x91/0xf0 [ 36.419534] print_report+0xcc/0x620 [ 36.420045] ? __virt_addr_valid+0x102/0x340 [ 36.420635] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.421299] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.421952] kasan_report+0xbe/0xf0 [ 36.422471] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.423132] vma_interval_tree_remove+0xc75/0xec0 [ 36.423789] vma_prepare+0xc54/0x11a0 [ 36.424299] __split_vma+0x5af/0x950 [ 36.424797] ? __pfx___split_vma+0x10/0x10 [ 36.425361] ? find_held_lock+0x2c/0x110 [ 36.425923] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.426545] ? lock_is_held_type+0x9f/0x120 [ 36.427124] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.427773] ? mtree_range_walk+0x632/0x900 [ 36.428363] ? mas_walk+0x5c7/0x7c0 [ 36.428864] do_vmi_munmap+0x1f1/0x2b0 [ 36.429394] mmap_region+0x1f9/0x2660 [ 36.429907] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.430466] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.431229] ? __pfx_lock_acquire+0x10/0x10 [ 36.431802] ? __pfx_mmap_region+0x10/0x10 [ 36.432371] ? security_mmap_addr+0x7d/0xa0 [ 36.432949] ? get_unmapped_area+0x1f5/0x3f0 [ 36.433548] do_mmap+0x854/0xf00 [ 36.434025] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.434576] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.435182] ksys_mmap_pgoff+0x3af/0x500 [ 36.435734] do_syscall_64+0x3f/0x90 [ 36.436247] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.436942] RIP: 0033:0x7f51cdc7bd82 [ 36.437433] 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 [ 36.440158] RSP: 002b:00007ffd441e0008 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.441249] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f51cdc7bd82 [ 36.442249] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f51cd0b5000 [ 36.443244] RBP: 00007f51cd0b5000 R08: 0000000000000009 R09: 0000000000001000 [ 36.444266] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fad92c8ec0 [ 36.445289] R13: 00007ffd441e0020 R14: 00007ffd441e0050 R15: 00007ffd441e03b0 [ 36.446337] [ 36.446677] [ 36.446929] Allocated by task 212: [ 36.447423] kasan_save_stack+0x22/0x50 [ 36.448003] kasan_set_track+0x25/0x30 [ 36.448565] __kasan_slab_alloc+0x59/0x70 [ 36.449130] kmem_cache_alloc+0x16b/0x370 [ 36.449663] vm_area_dup+0x20/0x160 [ 36.450175] __split_vma+0x170/0x950 [ 36.450712] split_vma+0xc6/0x110 [ 36.451214] mprotect_fixup+0x8d2/0xb30 [ 36.451786] do_mprotect_pkey+0x87e/0xd40 [ 36.452381] __x64_sys_mprotect+0x78/0xc0 [ 36.452956] do_syscall_64+0x3f/0x90 [ 36.453441] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.454152] [ 36.454427] Freed by task 212: [ 36.454867] kasan_save_stack+0x22/0x50 [ 36.455438] kasan_set_track+0x25/0x30 [ 36.455999] kasan_save_free_info+0x2b/0x50 [ 36.456600] __kasan_slab_free+0x10a/0x190 [ 36.457172] kmem_cache_free+0x10d/0x4d0 [ 36.457712] rcu_core+0x8c8/0x2860 [ 36.458217] __do_softirq+0x1b7/0x7d4 [ 36.458750] [ 36.458984] Last potentially related work creation: [ 36.459613] kasan_save_stack+0x22/0x50 [ 36.460159] __kasan_record_aux_stack+0x8e/0xa0 [ 36.460782] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.461426] remove_vma+0x139/0x170 [ 36.461895] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.462530] do_vmi_munmap+0x1f1/0x2b0 [ 36.463053] __vm_munmap+0x138/0x3a0 [ 36.463554] __x64_sys_munmap+0x59/0x80 [ 36.464081] do_syscall_64+0x3f/0x90 [ 36.464589] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.465245] [ 36.465462] Second to last potentially related work creation: [ 36.466183] kasan_save_stack+0x22/0x50 [ 36.466733] __kasan_record_aux_stack+0x8e/0xa0 [ 36.467352] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.468023] remove_vma+0x139/0x170 [ 36.468473] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.469060] do_vmi_munmap+0x1f1/0x2b0 [ 36.469580] __vm_munmap+0x138/0x3a0 [ 36.470080] elf_map+0x26f/0x310 [ 36.470563] load_elf_binary+0xd82/0x5030 [ 36.471121] bprm_execve+0x803/0x1940 [ 36.471623] do_execveat_common+0x734/0x8e0 [ 36.472169] __x64_sys_execve+0x93/0xc0 [ 36.472657] do_syscall_64+0x3f/0x90 [ 36.473169] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.473862] [ 36.474096] The buggy address belongs to the object at ffff8880145b22b8 [ 36.474096] which belongs to the cache vm_area_struct of size 168 [ 36.475711] The buggy address is located 88 bytes inside of [ 36.475711] freed 168-byte region [ffff8880145b22b8, ffff8880145b2360) [ 36.477164] [ 36.477398] The buggy address belongs to the physical page: [ 36.478114] page:00000000865fca0a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x145b2 [ 36.479317] memcg:ffff88801689f601 [ 36.479788] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 36.480484] page_type: 0xffffffff() [ 36.480949] raw: 0100000000000200 ffff88800879fc80 ffffea000051f480 dead000000000003 [ 36.481942] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801689f601 [ 36.482933] page dumped because: kasan: bad access detected [ 36.483654] [ 36.483893] Memory state around the buggy address: [ 36.484520] ffff8880145b2200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 36.485437] ffff8880145b2280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 36.486362] >ffff8880145b2300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 36.487257] ^ [ 36.487758] ffff8880145b2380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.488678] ffff8880145b2400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 36.489547] ================================================================== [ 36.490668] Disabling lock debugging due to kernel taint [ 38.496195] BUG: Bad rss-counter state mm:00000000bc56c6f2 type:MM_FILEPAGES val:33 [ 38.497565] BUG: Bad rss-counter state mm:00000000bc56c6f2 type:MM_ANONPAGES val:22 [ 38.911150] BUG: Bad rss-counter state mm:00000000c3a29431 type:MM_FILEPAGES val:33 [ 38.912078] BUG: Bad rss-counter state mm:00000000c3a29431 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32452' (ECDSA) to the list of known hosts. 2023/06/19 17:04:20 fuzzer started 2023/06/19 17:04:20 dialing manager at localhost:44161 2023/06/19 17:04:20 checking machine... 2023/06/19 17:04:20 checking revisions... [ 39.628723] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:04:20 testing simple program... [ 39.681508] cgroup: Unknown subsys name 'net' [ 39.729390] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:04:19 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880165d8b00 RCX=0000000000000000 RDX=ffff8880158751c0 RSI=ffffffff8186ba36 RDI=ffff88800e814a00 RBP=ffff88800e814a00 RSP=ffff8880167d7aa8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000008000 R13=ffff8880165d8b00 R14=0000000000000000 R15=ffff8880167d7df0 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f1c18b82900 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=00007f1c19137650 CR3=000000000ea72000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800fdc8000 RCX=0000000000000002 RDX=0000000000000200 RSI=0000000000000000 RDI=ffffed1001fb9140 RBP=0000000000001000 RSP=ffff88800d88fcc8 R8 =ffff88800fdc8000 R9 =0000000000000000 R10=ffffed1001fb9000 R11=0000000000000000 R12=ffff88800fdc8000 R13=0000000000000cc0 R14=0000000000000000 R15=0000000000000cc0 RIP=ffffffff8450d422 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 00007f0dfc7d3900 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=00007f0dfbbd3580 CR3=00000000095e8000 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=64ee03f4f8e6201100000000000ae988 XMM05=3a414b4ec6d553a10000000000136878 XMM06=4fda316b135da52b00000000001352f8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000