syzkaller login: [ 30.800054] BUG: Bad rss-counter state mm:00000000f1c7d9a4 type:MM_FILEPAGES val:33 [ 30.801335] BUG: Bad rss-counter state mm:00000000f1c7d9a4 type:MM_ANONPAGES val:22 [ 30.983448] ================================================================== [ 30.984476] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.985534] Read of size 8 at addr ffff888019d5d798 by task sshd/221 [ 30.986517] [ 30.986766] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.987769] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.988891] Call Trace: [ 30.989258] [ 30.989585] dump_stack_lvl+0x91/0xf0 [ 30.990168] print_report+0xcc/0x620 [ 30.990741] ? __virt_addr_valid+0x102/0x340 [ 30.991389] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.992124] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.992849] kasan_report+0xbe/0xf0 [ 30.993411] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.994142] vma_interval_tree_remove+0xc75/0xec0 [ 30.994853] vma_prepare+0xc54/0x11a0 [ 30.995418] __split_vma+0x5af/0x950 [ 30.995987] ? __pfx___split_vma+0x10/0x10 [ 30.996610] ? find_held_lock+0x2c/0x110 [ 30.997224] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.997887] ? lock_is_held_type+0x9f/0x120 [ 30.998528] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.999235] ? mtree_range_walk+0x632/0x900 [ 30.999910] ? mas_walk+0x5c7/0x7c0 [ 31.000464] do_vmi_munmap+0x1f1/0x2b0 [ 31.001047] mmap_region+0x1f9/0x2660 [ 31.001622] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.002216] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.003048] ? __pfx_lock_acquire+0x10/0x10 [ 31.003671] ? __pfx_mmap_region+0x10/0x10 [ 31.004306] ? security_mmap_addr+0x7d/0xa0 [ 31.004925] ? get_unmapped_area+0x1f5/0x3f0 [ 31.005575] do_mmap+0x854/0xf00 [ 31.006091] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.006670] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.007330] ksys_mmap_pgoff+0x3af/0x500 [ 31.007931] do_syscall_64+0x3f/0x90 [ 31.008490] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.009251] RIP: 0033:0x7f546c2f3d82 [ 31.009792] 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 [ 31.012310] RSP: 002b:00007fff286bd0e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.013369] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f546c2f3d82 [ 31.014364] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f546b72d000 [ 31.015353] RBP: 00007f546b72d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.016357] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c2541b2ec0 [ 31.017344] R13: 00007fff286bd100 R14: 00007fff286bd130 R15: 00007fff286bd490 [ 31.018345] [ 31.018684] [ 31.018934] Allocated by task 214: [ 31.019438] kasan_save_stack+0x22/0x50 [ 31.020043] kasan_set_track+0x25/0x30 [ 31.020621] __kasan_slab_alloc+0x59/0x70 [ 31.021233] kmem_cache_alloc+0x16b/0x370 [ 31.021839] vm_area_dup+0x20/0x160 [ 31.022366] __split_vma+0x170/0x950 [ 31.022907] split_vma+0xc6/0x110 [ 31.023413] mprotect_fixup+0x8d2/0xb30 [ 31.024008] do_mprotect_pkey+0x87e/0xd40 [ 31.024612] __x64_sys_mprotect+0x78/0xc0 [ 31.025232] do_syscall_64+0x3f/0x90 [ 31.025778] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.026524] [ 31.026772] Freed by task 210: [ 31.027222] kasan_save_stack+0x22/0x50 [ 31.027810] kasan_set_track+0x25/0x30 [ 31.028386] kasan_save_free_info+0x2b/0x50 [ 31.028999] __kasan_slab_free+0x10a/0x190 [ 31.029624] kmem_cache_free+0x10d/0x4d0 [ 31.030213] rcu_core+0x8c8/0x2860 [ 31.030726] __do_softirq+0x1b7/0x7d4 [ 31.031278] [ 31.031527] Last potentially related work creation: [ 31.032225] kasan_save_stack+0x22/0x50 [ 31.032812] __kasan_record_aux_stack+0x8e/0xa0 [ 31.033474] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.034219] remove_vma+0x139/0x170 [ 31.034740] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.035386] do_vmi_munmap+0x1f1/0x2b0 [ 31.035961] __vm_munmap+0x138/0x3a0 [ 31.036504] __x64_sys_munmap+0x59/0x80 [ 31.037082] do_syscall_64+0x3f/0x90 [ 31.037638] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.038384] [ 31.038628] The buggy address belongs to the object at ffff888019d5d740 [ 31.038628] which belongs to the cache vm_area_struct of size 168 [ 31.040350] The buggy address is located 88 bytes inside of [ 31.040350] freed 168-byte region [ffff888019d5d740, ffff888019d5d7e8) [ 31.041977] [ 31.042225] The buggy address belongs to the physical page: [ 31.042990] page:00000000638cc055 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19d5d [ 31.044268] memcg:ffff88800e3ece01 [ 31.044764] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.045509] page_type: 0xffffffff() [ 31.046028] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.047090] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e3ece01 [ 31.048159] page dumped because: kasan: bad access detected [ 31.048919] [ 31.049166] Memory state around the buggy address: [ 31.049827] ffff888019d5d680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.050814] ffff888019d5d700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.051805] >ffff888019d5d780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.052752] ^ [ 31.053303] ffff888019d5d800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.054250] ffff888019d5d880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.055182] ================================================================== [ 31.056346] Disabling lock debugging due to kernel taint [ 33.450635] BUG: Bad rss-counter state mm:00000000b5441fc8 type:MM_FILEPAGES val:33 [ 33.451894] BUG: Bad rss-counter state mm:00000000b5441fc8 type:MM_ANONPAGES val:22 [ 33.968158] BUG: Bad rss-counter state mm:00000000d4d872a2 type:MM_FILEPAGES val:33 [ 33.969573] BUG: Bad rss-counter state mm:00000000d4d872a2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30957' (ECDSA) to the list of known hosts. 2023/06/21 08:25:02 fuzzer started 2023/06/21 08:25:02 dialing manager at localhost:36067 2023/06/21 08:25:02 checking machine... 2023/06/21 08:25:02 checking revisions... [ 34.623678] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:25:02 testing simple program... [ 34.674868] cgroup: Unknown subsys name 'net' [ 34.732015] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:25:02 Registers: info registers vcpu 0 RAX=0000000080000001 RBX=0000000000000000 RCX=ffffffff8171120a RDX=ffff888018c1b680 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff8880169e7d90 RSP=ffff8880169e7bf8 R8 =0000000000000005 R9 =0000000000000001 R10=0000000000000001 R11=0000000000000000 R12=ffffea00006a1480 R13=ffff88801a28f3a0 R14=ffff8880169e7db8 R15=ffffea00006a14b4 RIP=ffffffff814c086b 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fafab344900 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=000055e2aa6cc664 CR3=000000000dcec000 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=0000000000000000000055e2a9b4d060 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=0000000080000000 RBX=00007ffe5d9799d0 RCX=ffffffff8369d159 RDX=ffff8880144cd1c0 RSI=0000000000000000 RDI=0000000000000007 RBP=ffff8880102f78e0 RSP=ffff8880102f77b8 R8 =0000000000000007 R9 =0000000000000003 R10=0000000000000000 R11=63206e6f69737365 R12=ffff8880102f7e60 R13=0000000000000000 R14=dffffc0000000000 R15=00007ffe5d9799d0 RIP=ffffffff814c086b RFL=00040293 [--S-A-C] 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 00007f005bda1900 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=00007f005b1ec700 CR3=000000000c5d0000 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=b30fa74d9516b5b4624cecacc00576e4 XMM02=eff9b2d0a8fce9cb000000000011d950 XMM03=2c67c8bc2e329bc3000000000011da78 XMM04=eaa7f72eca37a77200000000000ae988 XMM05=7f04e1dacc9ed52f0000000000133128 XMM06=e4cb8bb95a7664b60000000000131fc0 XMM07=fb795ef6d65770560000000000122160 XMM08=2c67c8bc2e329bc3000000000011da78 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000