syzkaller login: [ 31.761140] BUG: Bad rss-counter state mm:00000000a873657e type:MM_FILEPAGES val:33 [ 31.762332] BUG: Bad rss-counter state mm:00000000a873657e type:MM_ANONPAGES val:22 [ 31.810506] ================================================================== [ 31.811623] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.812657] Read of size 8 at addr ffff88800ed78ed8 by task sshd/220 [ 31.813627] [ 31.813845] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.814727] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.815985] Call Trace: [ 31.816427] [ 31.816862] dump_stack_lvl+0x91/0xf0 [ 31.817633] print_report+0xcc/0x620 [ 31.818414] ? __virt_addr_valid+0x102/0x340 [ 31.819344] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.820077] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.820713] kasan_report+0xbe/0xf0 [ 31.821202] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.821870] vma_interval_tree_remove+0xc75/0xec0 [ 31.822473] vma_prepare+0xc54/0x11a0 [ 31.823049] __split_vma+0x5af/0x950 [ 31.823529] ? __pfx___split_vma+0x10/0x10 [ 31.824083] ? find_held_lock+0x2c/0x110 [ 31.824636] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.825233] ? lock_is_held_type+0x9f/0x120 [ 31.825773] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.826423] ? mtree_range_walk+0x632/0x900 [ 31.826995] ? mas_walk+0x5c7/0x7c0 [ 31.827476] do_vmi_munmap+0x1f1/0x2b0 [ 31.827985] mmap_region+0x1f9/0x2660 [ 31.828500] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.829013] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.829713] ? __pfx_lock_acquire+0x10/0x10 [ 31.830269] ? __pfx_mmap_region+0x10/0x10 [ 31.830800] ? security_mmap_addr+0x7d/0xa0 [ 31.831369] ? get_unmapped_area+0x1f5/0x3f0 [ 31.831943] do_mmap+0x854/0xf00 [ 31.832402] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.832917] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.833476] ksys_mmap_pgoff+0x3af/0x500 [ 31.833977] do_syscall_64+0x3f/0x90 [ 31.834448] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.835146] RIP: 0033:0x7f94cf5a9d82 [ 31.835604] 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 [ 31.837808] RSP: 002b:00007ffecaa01c28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.838795] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f94cf5a9d82 [ 31.839703] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f94ce9e3000 [ 31.840584] RBP: 00007f94ce9e3000 R08: 0000000000000009 R09: 0000000000001000 [ 31.841475] R10: 0000000000000812 R11: 0000000000000206 R12: 000055949a284ec0 [ 31.842379] R13: 00007ffecaa01c40 R14: 00007ffecaa01c70 R15: 00007ffecaa01fd0 [ 31.843311] [ 31.843619] [ 31.843837] Allocated by task 213: [ 31.844277] kasan_save_stack+0x22/0x50 [ 31.844804] kasan_set_track+0x25/0x30 [ 31.845331] __kasan_slab_alloc+0x59/0x70 [ 31.845892] kmem_cache_alloc+0x16b/0x370 [ 31.846411] vm_area_dup+0x20/0x160 [ 31.846866] __split_vma+0x170/0x950 [ 31.847386] split_vma+0xc6/0x110 [ 31.847834] mprotect_fixup+0x8d2/0xb30 [ 31.848355] do_mprotect_pkey+0x87e/0xd40 [ 31.848896] __x64_sys_mprotect+0x78/0xc0 [ 31.849472] do_syscall_64+0x3f/0x90 [ 31.849970] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.850643] [ 31.850869] Freed by task 213: [ 31.851363] kasan_save_stack+0x22/0x50 [ 31.851887] kasan_set_track+0x25/0x30 [ 31.852446] kasan_save_free_info+0x2b/0x50 [ 31.853003] __kasan_slab_free+0x10a/0x190 [ 31.853548] kmem_cache_free+0x10d/0x4d0 [ 31.854083] rcu_core+0x8c8/0x2860 [ 31.854587] __do_softirq+0x1b7/0x7d4 [ 31.855097] [ 31.855322] Last potentially related work creation: [ 31.855932] kasan_save_stack+0x22/0x50 [ 31.856491] __kasan_record_aux_stack+0x8e/0xa0 [ 31.857094] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.857804] remove_vma+0x139/0x170 [ 31.858282] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.858940] do_vmi_munmap+0x1f1/0x2b0 [ 31.859534] __vm_munmap+0x138/0x3a0 [ 31.860031] __x64_sys_munmap+0x59/0x80 [ 31.860586] do_syscall_64+0x3f/0x90 [ 31.861121] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.861822] [ 31.862051] Second to last potentially related work creation: [ 31.862815] kasan_save_stack+0x22/0x50 [ 31.863395] __kasan_record_aux_stack+0x8e/0xa0 [ 31.864031] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.864724] remove_vma+0x139/0x170 [ 31.865207] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.865868] do_vmi_munmap+0x1f1/0x2b0 [ 31.866375] mmap_region+0x1f9/0x2660 [ 31.866887] do_mmap+0x854/0xf00 [ 31.867388] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.867962] ksys_mmap_pgoff+0x3af/0x500 [ 31.868520] do_syscall_64+0x3f/0x90 [ 31.869016] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.869680] [ 31.869907] The buggy address belongs to the object at ffff88800ed78e80 [ 31.869907] which belongs to the cache vm_area_struct of size 168 [ 31.871458] The buggy address is located 88 bytes inside of [ 31.871458] freed 168-byte region [ffff88800ed78e80, ffff88800ed78f28) [ 31.872926] [ 31.873182] The buggy address belongs to the physical page: [ 31.873921] page:0000000079f7725d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed78 [ 31.875102] memcg:ffff88800e49ab01 [ 31.875550] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.876280] page_type: 0xffffffff() [ 31.876753] raw: 0100000000000200 ffff88800879fc80 ffffea000036ecc0 dead000000000003 [ 31.877776] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e49ab01 [ 31.878769] page dumped because: kasan: bad access detected [ 31.879488] [ 31.879739] Memory state around the buggy address: [ 31.880339] ffff88800ed78d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.881217] ffff88800ed78e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.882097] >ffff88800ed78e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.883002] ^ [ 31.883741] ffff88800ed78f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.884587] ffff88800ed78f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.885460] ================================================================== [ 31.886474] Disabling lock debugging due to kernel taint [ 34.133028] BUG: Bad rss-counter state mm:00000000d251fbfe type:MM_FILEPAGES val:33 [ 34.134131] BUG: Bad rss-counter state mm:00000000d251fbfe type:MM_ANONPAGES val:22 [ 34.591157] BUG: Bad rss-counter state mm:00000000fdbfe85f type:MM_FILEPAGES val:33 [ 34.592305] BUG: Bad rss-counter state mm:00000000fdbfe85f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46387' (ECDSA) to the list of known hosts. 2023/06/19 20:19:27 fuzzer started 2023/06/19 20:19:28 dialing manager at localhost:44161 2023/06/19 20:19:28 checking machine... 2023/06/19 20:19:28 checking revisions... [ 35.286432] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:19:28 testing simple program... [ 35.340340] cgroup: Unknown subsys name 'net' [ 35.413694] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:19:27 Registers: info registers vcpu 0 RAX=1ffff11001c05613 RBX=ffff88800e02b068 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800e02b098 RBP=ffff8880143a5080 RSP=ffff88806ce09dd8 R8 =0000000000000001 R9 =ffffed100d9c13af R10=0000000000000003 R11=0000000000000000 R12=dffffc0000000000 R13=ffff8880143bdbe8 R14=ffffffff813782a8 R15=ffff88800d9f0a80 RIP=ffffffff8184636c 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 0000000000000000 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=00007fab8f4da430 CR3=0000000015d00000 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=2037323a39313a3032203931206e754a XMM01=6964206465766965636552203a5d3932 XMM02=6f63736964203a31313a383932383420 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a39313a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888016ad7f58 RCX=1ffff11002d5aff9 RDX=000000000000006e RSI=00007f4fc86218a0 RDI=0000000000000003 RBP=ffff888016ad7f48 RSP=ffff888016ad7f18 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=0000000000000000 R12=ffff888016ad7f58 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8363fa64 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 00007f4fc806b900 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=000055c0ce6f0768 CR3=000000000dee6000 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=ff0000000000ffff0000000000ff0000 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