syzkaller login: [ 23.836671] BUG: Bad rss-counter state mm:000000003544d62f type:MM_FILEPAGES val:33 [ 23.837687] BUG: Bad rss-counter state mm:000000003544d62f type:MM_ANONPAGES val:22 [ 24.006918] ================================================================== [ 24.007993] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.008928] Read of size 8 at addr ffff888019d316b0 by task sshd/220 [ 24.009828] [ 24.010047] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.010916] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.011925] Call Trace: [ 24.012248] [ 24.012534] dump_stack_lvl+0x91/0xf0 [ 24.013023] print_report+0xcc/0x620 [ 24.013519] ? __virt_addr_valid+0x102/0x340 [ 24.014073] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.014683] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.015309] kasan_report+0xbe/0xf0 [ 24.015802] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.016421] vma_interval_tree_remove+0xc75/0xec0 [ 24.017017] vma_prepare+0xc54/0x11a0 [ 24.017495] __split_vma+0x5af/0x950 [ 24.017963] ? __pfx___split_vma+0x10/0x10 [ 24.018491] ? find_held_lock+0x2c/0x110 [ 24.019010] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.019579] ? lock_is_held_type+0x9f/0x120 [ 24.020121] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.020723] ? mtree_range_walk+0x632/0x900 [ 24.021272] ? mas_walk+0x5c7/0x7c0 [ 24.021751] do_vmi_munmap+0x1f1/0x2b0 [ 24.022243] mmap_region+0x1f9/0x2660 [ 24.022727] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.023244] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.023962] ? __pfx_lock_acquire+0x10/0x10 [ 24.024495] ? __pfx_mmap_region+0x10/0x10 [ 24.025031] ? security_mmap_addr+0x7d/0xa0 [ 24.025567] ? get_unmapped_area+0x1f5/0x3f0 [ 24.026113] do_mmap+0x854/0xf00 [ 24.026555] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.027044] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.027617] ksys_mmap_pgoff+0x3af/0x500 [ 24.028123] do_syscall_64+0x3f/0x90 [ 24.028612] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.029269] RIP: 0033:0x7feb32986d82 [ 24.029725] 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 [ 24.031838] RSP: 002b:00007ffe9ea93998 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.032737] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007feb32986d82 [ 24.033580] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007feb31dc0000 [ 24.034415] RBP: 00007feb31dc0000 R08: 0000000000000009 R09: 0000000000001000 [ 24.035262] R10: 0000000000000812 R11: 0000000000000206 R12: 00005580833f4f70 [ 24.036124] R13: 00007ffe9ea939b0 R14: 00007ffe9ea939e0 R15: 00007ffe9ea93d40 [ 24.036976] [ 24.037271] [ 24.037490] Allocated by task 213: [ 24.037912] kasan_save_stack+0x22/0x50 [ 24.038412] kasan_set_track+0x25/0x30 [ 24.038910] __kasan_slab_alloc+0x59/0x70 [ 24.039434] kmem_cache_alloc+0x16b/0x370 [ 24.039956] vm_area_dup+0x20/0x160 [ 24.040411] __split_vma+0x170/0x950 [ 24.040880] split_vma+0xc6/0x110 [ 24.041326] mprotect_fixup+0x8d2/0xb30 [ 24.041832] do_mprotect_pkey+0x87e/0xd40 [ 24.042350] __x64_sys_mprotect+0x78/0xc0 [ 24.042874] do_syscall_64+0x3f/0x90 [ 24.043349] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.044011] [ 24.044226] Freed by task 213: [ 24.044628] kasan_save_stack+0x22/0x50 [ 24.045126] kasan_set_track+0x25/0x30 [ 24.045619] kasan_save_free_info+0x2b/0x50 [ 24.046152] __kasan_slab_free+0x10a/0x190 [ 24.046691] kmem_cache_free+0x10d/0x4d0 [ 24.047204] rcu_core+0x8c8/0x2860 [ 24.047663] __do_softirq+0x1b7/0x7d4 [ 24.048176] [ 24.048396] Last potentially related work creation: [ 24.048974] kasan_save_stack+0x22/0x50 [ 24.049478] __kasan_record_aux_stack+0x8e/0xa0 [ 24.050053] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.050693] remove_vma+0x139/0x170 [ 24.051151] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.051748] do_vmi_munmap+0x1f1/0x2b0 [ 24.052260] __vm_munmap+0x138/0x3a0 [ 24.052731] __x64_sys_munmap+0x59/0x80 [ 24.053229] do_syscall_64+0x3f/0x90 [ 24.053705] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.054354] [ 24.054579] The buggy address belongs to the object at ffff888019d31658 [ 24.054579] which belongs to the cache vm_area_struct of size 168 [ 24.056079] The buggy address is located 88 bytes inside of [ 24.056079] freed 168-byte region [ffff888019d31658, ffff888019d31700) [ 24.057488] [ 24.057709] The buggy address belongs to the physical page: [ 24.058368] page:00000000a8faaade refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19d31 [ 24.059456] memcg:ffff88800c57a301 [ 24.059928] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.060585] page_type: 0xffffffff() [ 24.061030] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.061944] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c57a301 [ 24.062841] page dumped because: kasan: bad access detected [ 24.063514] [ 24.063737] Memory state around the buggy address: [ 24.064316] ffff888019d31580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.065165] ffff888019d31600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 24.066077] >ffff888019d31680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.066952] ^ [ 24.067540] ffff888019d31700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 24.068419] ffff888019d31780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 24.069278] ================================================================== [ 24.070254] Disabling lock debugging due to kernel taint [ 26.020768] BUG: Bad rss-counter state mm:00000000db0e0861 type:MM_FILEPAGES val:33 [ 26.021571] BUG: Bad rss-counter state mm:00000000db0e0861 type:MM_ANONPAGES val:22 [ 26.475045] BUG: Bad rss-counter state mm:000000005db92ef4 type:MM_FILEPAGES val:33 [ 26.475997] BUG: Bad rss-counter state mm:000000005db92ef4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55194' (ECDSA) to the list of known hosts. 2023/06/20 16:33:36 fuzzer started 2023/06/20 16:33:37 dialing manager at localhost:36067 2023/06/20 16:33:37 checking machine... 2023/06/20 16:33:37 checking revisions... [ 27.184380] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:33:37 testing simple program... [ 27.232027] cgroup: Unknown subsys name 'net' [ 27.291154] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:33:36 Registers: info registers vcpu 0 RAX=ffffffff8363e064 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff110030c3e49 RSI=ffffffff8363e064 RDI=ffff88801861f2b8 RBP=ffff88801861f288 RSP=ffff88801861f1e8 R8 =0000000000000001 R9 =ffff88801861f230 R10=0000000000038001 R11=000000000008a88c R12=ffff88801861f2b8 R13=0000000000000000 R14=ffff88800ef751c0 R15=0000000000001000 RIP=ffffffff813ad470 RFL=00000282 [--S----] 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 00007eff0ec45900 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=00007eff0f1fc618 CR3=000000000eb06000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffed10031ce0d2 RBX=ffffed10031ce0d3 RCX=ffffffff81651277 RDX=ffffed10031ce0d3 RSI=0000000000000008 RDI=ffff888018e70690 RBP=ffffed10031ce0d2 RSP=ffff8880090bf068 R8 =0000000000000000 R9 =ffffed10031ce0d2 R10=ffff888018e70697 R11=0000000000009293 R12=1ffff11001217e17 R13=ffff888018e70690 R14=0000000000000000 R15=0000000000000001 RIP=ffffffff8180f189 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 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=00007eff0ebb5000 CR3=000000000eb06000 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=fbd2f09a82cbbcb2fb6dafd4b88d2a53 XMM02=2331499e764e6e702bbd6d36a3b657be XMM03=141ca449f626f27ce3bdc858f99938b4 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=0e0d0c0f0a09080b0605040702010003 XMM08=75a6add81c40c91eb70f6ab7c9dfc57e XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000