syzkaller login: [ 68.860878] BUG: Bad rss-counter state mm:00000000185fd719 type:MM_FILEPAGES val:33 [ 68.862093] BUG: Bad rss-counter state mm:00000000185fd719 type:MM_ANONPAGES val:22 [ 69.016873] ================================================================== [ 69.017747] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 69.018681] Read of size 8 at addr ffff88800fbfb3f8 by task sshd/226 [ 69.019419] [ 69.019631] CPU: 1 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 69.020466] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 69.021404] Call Trace: [ 69.021719] [ 69.022002] dump_stack_lvl+0x91/0xf0 [ 69.022480] print_report+0xcc/0x620 [ 69.022949] ? __virt_addr_valid+0x102/0x340 [ 69.023481] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.024078] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.024680] kasan_report+0xbe/0xf0 [ 69.025147] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.025748] vma_interval_tree_remove+0xc75/0xec0 [ 69.026343] vma_prepare+0xc54/0x11a0 [ 69.026803] __split_vma+0x5af/0x950 [ 69.027265] ? __pfx___split_vma+0x10/0x10 [ 69.027782] ? find_held_lock+0x2c/0x110 [ 69.028293] do_vmi_align_munmap+0x2ba/0x11f0 [ 69.028839] ? lock_is_held_type+0x9f/0x120 [ 69.029359] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 69.030138] ? mtree_range_walk+0x632/0x900 [ 69.030679] ? mas_walk+0x5c7/0x7c0 [ 69.031140] do_vmi_munmap+0x1f1/0x2b0 [ 69.031620] mmap_region+0x1f9/0x2660 [ 69.032094] ? vm_mmap_pgoff+0x15c/0x3a0 [ 69.032594] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 69.033288] ? __pfx_lock_acquire+0x10/0x10 [ 69.033806] ? __pfx_mmap_region+0x10/0x10 [ 69.034335] ? security_mmap_addr+0x7d/0xa0 [ 69.034851] ? get_unmapped_area+0x1f5/0x3f0 [ 69.035398] do_mmap+0x854/0xf00 [ 69.035831] vm_mmap_pgoff+0x1a6/0x3a0 [ 69.036423] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 69.036981] ksys_mmap_pgoff+0x3af/0x500 [ 69.037476] do_syscall_64+0x3f/0x90 [ 69.037941] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.038595] RIP: 0033:0x7f27986b7d82 [ 69.039041] 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 [ 69.041103] RSP: 002b:00007ffe7697bfd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 69.041986] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f27986b7d82 [ 69.042843] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2797af1000 [ 69.043785] RBP: 00007f2797af1000 R08: 0000000000000009 R09: 0000000000001000 [ 69.044742] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a56c51eec0 [ 69.045566] R13: 00007ffe7697bff0 R14: 00007ffe7697c020 R15: 00007ffe7697c380 [ 69.046418] [ 69.046702] [ 69.046910] Allocated by task 219: [ 69.047323] kasan_save_stack+0x22/0x50 [ 69.047812] kasan_set_track+0x25/0x30 [ 69.048292] __kasan_slab_alloc+0x59/0x70 [ 69.048797] kmem_cache_alloc+0x16b/0x370 [ 69.049306] vm_area_dup+0x20/0x160 [ 69.049746] __split_vma+0x170/0x950 [ 69.050206] split_vma+0xc6/0x110 [ 69.050634] mprotect_fixup+0x8d2/0xb30 [ 69.051121] do_mprotect_pkey+0x87e/0xd40 [ 69.051626] __x64_sys_mprotect+0x78/0xc0 [ 69.052131] do_syscall_64+0x3f/0x90 [ 69.052591] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.053208] [ 69.053419] Freed by task 219: [ 69.053799] kasan_save_stack+0x22/0x50 [ 69.054301] kasan_set_track+0x25/0x30 [ 69.054776] kasan_save_free_info+0x2b/0x50 [ 69.055296] __kasan_slab_free+0x10a/0x190 [ 69.055813] kmem_cache_free+0x10d/0x4d0 [ 69.056402] rcu_core+0x8c8/0x2860 [ 69.056839] __do_softirq+0x1b7/0x7d4 [ 69.057303] [ 69.057511] Last potentially related work creation: [ 69.058086] kasan_save_stack+0x22/0x50 [ 69.058579] __kasan_record_aux_stack+0x8e/0xa0 [ 69.059145] __call_rcu_common.constprop.0+0x6a/0xb90 [ 69.059778] remove_vma+0x139/0x170 [ 69.060219] do_vmi_align_munmap+0xd4a/0x11f0 [ 69.060771] do_vmi_munmap+0x1f1/0x2b0 [ 69.061248] __vm_munmap+0x138/0x3a0 [ 69.061712] __x64_sys_munmap+0x59/0x80 [ 69.062206] do_syscall_64+0x3f/0x90 [ 69.062679] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.063309] [ 69.063520] The buggy address belongs to the object at ffff88800fbfb3a0 [ 69.063520] which belongs to the cache vm_area_struct of size 168 [ 69.064969] The buggy address is located 88 bytes inside of [ 69.064969] freed 168-byte region [ffff88800fbfb3a0, ffff88800fbfb448) [ 69.066367] [ 69.066580] The buggy address belongs to the physical page: [ 69.067233] page:00000000548bce46 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfbfb [ 69.068301] memcg:ffff88801a0a4301 [ 69.068719] flags: 0x100000000000200(slab|node=0|zone=1) [ 69.069351] page_type: 0xffffffff() [ 69.069798] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 69.070715] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a0a4301 [ 69.071611] page dumped because: kasan: bad access detected [ 69.072266] [ 69.072482] Memory state around the buggy address: [ 69.073053] ffff88800fbfb280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 69.073904] ffff88800fbfb300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 69.074771] >ffff88800fbfb380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 69.075624] ^ [ 69.076471] ffff88800fbfb400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 69.077322] ffff88800fbfb480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 69.078170] ================================================================== [ 69.079373] Disabling lock debugging due to kernel taint [ 71.400713] BUG: Bad rss-counter state mm:00000000d15ff182 type:MM_FILEPAGES val:33 [ 71.401683] BUG: Bad rss-counter state mm:00000000d15ff182 type:MM_ANONPAGES val:22 [ 71.874641] BUG: Bad rss-counter state mm:000000002c66d6a2 type:MM_FILEPAGES val:33 [ 71.875700] BUG: Bad rss-counter state mm:000000002c66d6a2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32695' (ECDSA) to the list of known hosts. 2023/06/19 16:16:17 fuzzer started 2023/06/19 16:16:17 dialing manager at localhost:44161 2023/06/19 16:16:17 checking machine... 2023/06/19 16:16:17 checking revisions... [ 72.617160] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:16:17 testing simple program... [ 72.690611] cgroup: Unknown subsys name 'net' [ 72.737406] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:16:17 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffffffff849384a0 RCX=0000000000000000 RDX=1ffff11001baacd3 RSI=ffffffff8186c09f RDI=0000000000000003 RBP=ffff88800dd56500 RSP=ffff88801b6ffdd8 R8 =0000000000000003 R9 =0000000000002000 R10=0000000000008000 R11=00000000000b6996 R12=ffff88800dd56698 R13=ffff88800dd56550 R14=ffff8880163102b0 R15=ffff88800dd56680 RIP=ffffffff814c07eb RFL=00000286 [--S--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 00007f21d7753900 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=00007f21d7d0b0b0 CR3=000000000d83e000 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=ffffffffffffffffffffffff00000000 XMM01=000056033ce9706000007f00746f6f72 XMM02=00000000000000000000000000000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=2f3a746f6f723a303a303a3a746f6f72 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000038 RBX=ffff888016e2c958 RCX=0000000000038141 RDX=0000000000038101 RSI=0000000000000d40 RDI=0000000000038101 RBP=ffff88800fb17cd8 RSP=ffff88800fb17c90 R8 =ffff888016e2c8a0 R9 =0000000000040990 R10=ffffffff85d3bed7 R11=0000000000000000 R12=ffff8880087b0500 R13=0000000000000000 R14=0000000000000000 R15=ffffffff81eeeaf8 RIP=ffffffff81807e4f RFL=00000286 [--S--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 00007f372d49f900 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=00007f4ab8d7d640 CR3=00000000168ae000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000