syzkaller login: [ 30.766820] BUG: Bad rss-counter state mm:000000004c535bac type:MM_FILEPAGES val:33 [ 30.768061] BUG: Bad rss-counter state mm:000000004c535bac type:MM_ANONPAGES val:22 [ 30.809457] ================================================================== [ 30.810439] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.811380] Read of size 8 at addr ffff888019c04228 by task sshd/220 [ 30.812163] [ 30.812382] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.813252] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.814234] Call Trace: [ 30.814554] [ 30.814841] dump_stack_lvl+0x91/0xf0 [ 30.815346] print_report+0xcc/0x620 [ 30.815846] ? __virt_addr_valid+0x102/0x340 [ 30.816408] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.817042] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.817674] kasan_report+0xbe/0xf0 [ 30.818155] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.818782] vma_interval_tree_remove+0xc75/0xec0 [ 30.819416] vma_prepare+0xc54/0x11a0 [ 30.819902] __split_vma+0x5af/0x950 [ 30.820376] ? __pfx___split_vma+0x10/0x10 [ 30.820913] ? find_held_lock+0x2c/0x110 [ 30.821446] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.822015] ? lock_is_held_type+0x9f/0x120 [ 30.822555] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.823188] ? mtree_range_walk+0x632/0x900 [ 30.823752] ? mas_walk+0x5c7/0x7c0 [ 30.824235] do_vmi_munmap+0x1f1/0x2b0 [ 30.824726] mmap_region+0x1f9/0x2660 [ 30.825218] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.825736] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.826471] ? __pfx_lock_acquire+0x10/0x10 [ 30.827015] ? __pfx_mmap_region+0x10/0x10 [ 30.827582] ? security_mmap_addr+0x7d/0xa0 [ 30.828107] ? get_unmapped_area+0x1f5/0x3f0 [ 30.828667] do_mmap+0x854/0xf00 [ 30.829115] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.829618] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.830201] ksys_mmap_pgoff+0x3af/0x500 [ 30.830719] do_syscall_64+0x3f/0x90 [ 30.831217] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.831877] RIP: 0033:0x7f37d93a4d82 [ 30.832355] 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 [ 30.834530] RSP: 002b:00007ffdbb94d348 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.835473] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f37d93a4d82 [ 30.836328] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f37d87de000 [ 30.837178] RBP: 00007f37d87de000 R08: 0000000000000009 R09: 0000000000001000 [ 30.838027] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e00a0a1980 [ 30.838887] R13: 00007ffdbb94d360 R14: 00007ffdbb94d390 R15: 00007ffdbb94d6f0 [ 30.839765] [ 30.840060] [ 30.840278] Allocated by task 213: [ 30.840710] kasan_save_stack+0x22/0x50 [ 30.841230] kasan_set_track+0x25/0x30 [ 30.841724] __kasan_slab_alloc+0x59/0x70 [ 30.842262] kmem_cache_alloc+0x16b/0x370 [ 30.842788] vm_area_dup+0x20/0x160 [ 30.843257] __split_vma+0x170/0x950 [ 30.843725] split_vma+0xc6/0x110 [ 30.844163] mprotect_fixup+0x8d2/0xb30 [ 30.844683] do_mprotect_pkey+0x87e/0xd40 [ 30.845217] __x64_sys_mprotect+0x78/0xc0 [ 30.845748] do_syscall_64+0x3f/0x90 [ 30.846230] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.846878] [ 30.847121] Freed by task 213: [ 30.847533] kasan_save_stack+0x22/0x50 [ 30.848048] kasan_set_track+0x25/0x30 [ 30.848544] kasan_save_free_info+0x2b/0x50 [ 30.849096] __kasan_slab_free+0x10a/0x190 [ 30.849641] kmem_cache_free+0x10d/0x4d0 [ 30.850157] rcu_core+0x8c8/0x2860 [ 30.850606] __do_softirq+0x1b7/0x7d4 [ 30.851095] [ 30.851312] Last potentially related work creation: [ 30.851900] kasan_save_stack+0x22/0x50 [ 30.852417] __kasan_record_aux_stack+0x8e/0xa0 [ 30.853011] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.853681] remove_vma+0x139/0x170 [ 30.854158] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.854744] do_vmi_munmap+0x1f1/0x2b0 [ 30.855270] __vm_munmap+0x138/0x3a0 [ 30.855768] __x64_sys_munmap+0x59/0x80 [ 30.856298] do_syscall_64+0x3f/0x90 [ 30.856793] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.857479] [ 30.857706] The buggy address belongs to the object at ffff888019c041d0 [ 30.857706] which belongs to the cache vm_area_struct of size 168 [ 30.859296] The buggy address is located 88 bytes inside of [ 30.859296] freed 168-byte region [ffff888019c041d0, ffff888019c04278) [ 30.860784] [ 30.861012] The buggy address belongs to the physical page: [ 30.861700] page:0000000061f1e7f3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19c04 [ 30.862853] memcg:ffff88800ed4fa01 [ 30.863314] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.863998] page_type: 0xffffffff() [ 30.864480] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.865469] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed4fa01 [ 30.866427] page dumped because: kasan: bad access detected [ 30.867131] [ 30.867360] Memory state around the buggy address: [ 30.867969] ffff888019c04100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.868877] ffff888019c04180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.869793] >ffff888019c04200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.870695] ^ [ 30.871301] ffff888019c04280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.872212] ffff888019c04300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.873124] ================================================================== [ 30.874474] Disabling lock debugging due to kernel taint [ 32.829323] BUG: Bad rss-counter state mm:000000004bdb4f5a type:MM_FILEPAGES val:33 [ 32.830515] BUG: Bad rss-counter state mm:000000004bdb4f5a type:MM_ANONPAGES val:22 [ 33.327343] BUG: Bad rss-counter state mm:000000009024e301 type:MM_FILEPAGES val:33 [ 33.328429] BUG: Bad rss-counter state mm:000000009024e301 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38780' (ECDSA) to the list of known hosts. 2023/06/20 16:39:40 fuzzer started 2023/06/20 16:39:41 dialing manager at localhost:36067 2023/06/20 16:39:41 checking machine... 2023/06/20 16:39:41 checking revisions... [ 34.061425] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:39:41 testing simple program... [ 34.113079] cgroup: Unknown subsys name 'net' [ 34.154770] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:39:40 Registers: info registers vcpu 0 RAX=1ffff110019fb91d RBX=ffff88800cfdc8b8 RCX=1ffff11001a1651e RDX=dffffc0000000000 RSI=ffff88800de0dd68 RDI=ffff88800cfdc8e8 RBP=ffff88800d0b28c0 RSP=ffff88801467f668 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff88800de0dc80 R13=0000000000000000 R14=ffff8880068ebd58 R15=ffff8880068ebd10 RIP=ffffffff8184767e 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 00007f76f2d70900 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=00007f76f21ff5e0 CR3=000000000c6c8000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=e7a124f14c91278700000000000ae988 XMM05=b8b39e26dcf816a000000000001325e0 XMM06=4fda316b135da52b0000000000131680 XMM07=fb795ef6d65770560000000000121928 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=0000000000000001 RCX=ffffffff846000a9 RDX=0000000000036000 RSI=0000000000036000 RDI=ffffffff865c19f0 RBP=ffff88800fc8f260 RSP=ffff88800fc8f198 R8 =0000000000000000 R9 =ffff88800fc8f248 R10=0000000000038001 R11=00000000000b6a61 R12=ffff88800fc8f268 R13=ffff88800fc8f250 R14=ffff88800fc8f249 R15=ffff88800fc8f208 RIP=ffffffff811307c2 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 00007f9d3c98e900 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=00007f9d3cf45618 CR3=000000000ee2c000 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=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