syzkaller login: [ 60.395538] BUG: Bad rss-counter state mm:0000000054ed1bd6 type:MM_FILEPAGES val:33 [ 60.396599] BUG: Bad rss-counter state mm:0000000054ed1bd6 type:MM_ANONPAGES val:22 [ 60.556509] ================================================================== [ 60.557594] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.558697] Read of size 8 at addr ffff88800d873a50 by task sshd/222 [ 60.559748] [ 60.560037] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.561012] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.561994] Call Trace: [ 60.562314] [ 60.562608] dump_stack_lvl+0x91/0xf0 [ 60.563099] print_report+0xcc/0x620 [ 60.563587] ? __virt_addr_valid+0x102/0x340 [ 60.564145] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.564758] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.565372] kasan_report+0xbe/0xf0 [ 60.565853] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.566472] vma_interval_tree_remove+0xc75/0xec0 [ 60.567073] vma_prepare+0xc54/0x11a0 [ 60.567552] __split_vma+0x5af/0x950 [ 60.568036] ? __pfx___split_vma+0x10/0x10 [ 60.568568] ? find_held_lock+0x2c/0x110 [ 60.569091] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.569661] ? lock_is_held_type+0x9f/0x120 [ 60.570199] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.570808] ? mtree_range_walk+0x632/0x900 [ 60.571357] ? mas_walk+0x5c7/0x7c0 [ 60.571831] do_vmi_munmap+0x1f1/0x2b0 [ 60.572347] mmap_region+0x1f9/0x2660 [ 60.572834] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.573355] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.574075] ? __pfx_lock_acquire+0x10/0x10 [ 60.574609] ? __pfx_mmap_region+0x10/0x10 [ 60.575140] ? security_mmap_addr+0x7d/0xa0 [ 60.575675] ? get_unmapped_area+0x1f5/0x3f0 [ 60.576234] do_mmap+0x854/0xf00 [ 60.576676] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.577170] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.577728] ksys_mmap_pgoff+0x3af/0x500 [ 60.578237] do_syscall_64+0x3f/0x90 [ 60.578720] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.579365] RIP: 0033:0x7f2750083d82 [ 60.579836] 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 [ 60.581971] RSP: 002b:00007ffe0cf65388 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.582874] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2750083d82 [ 60.583721] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f274f4bd000 [ 60.584577] RBP: 00007f274f4bd000 R08: 0000000000000009 R09: 0000000000001000 [ 60.585435] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a1e789aec0 [ 60.586282] R13: 00007ffe0cf653a0 R14: 00007ffe0cf653d0 R15: 00007ffe0cf65730 [ 60.587137] [ 60.587427] [ 60.587641] Allocated by task 215: [ 60.588084] kasan_save_stack+0x22/0x50 [ 60.588588] kasan_set_track+0x25/0x30 [ 60.589083] __kasan_slab_alloc+0x59/0x70 [ 60.589607] kmem_cache_alloc+0x16b/0x370 [ 60.590122] vm_area_dup+0x20/0x160 [ 60.590580] __split_vma+0x170/0x950 [ 60.591042] split_vma+0xc6/0x110 [ 60.591480] mprotect_fixup+0x8d2/0xb30 [ 60.591996] do_mprotect_pkey+0x87e/0xd40 [ 60.592516] __x64_sys_mprotect+0x78/0xc0 [ 60.593030] do_syscall_64+0x3f/0x90 [ 60.593509] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.594155] [ 60.594369] Freed by task 215: [ 60.594760] kasan_save_stack+0x22/0x50 [ 60.595262] kasan_set_track+0x25/0x30 [ 60.595751] kasan_save_free_info+0x2b/0x50 [ 60.596293] __kasan_slab_free+0x10a/0x190 [ 60.596827] kmem_cache_free+0x10d/0x4d0 [ 60.597333] rcu_core+0x8c8/0x2860 [ 60.597780] __do_softirq+0x1b7/0x7d4 [ 60.598262] [ 60.598476] Last potentially related work creation: [ 60.599060] kasan_save_stack+0x22/0x50 [ 60.599567] __kasan_record_aux_stack+0x8e/0xa0 [ 60.600243] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.600884] remove_vma+0x139/0x170 [ 60.601332] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.601895] do_vmi_munmap+0x1f1/0x2b0 [ 60.602380] __vm_munmap+0x138/0x3a0 [ 60.602851] __x64_sys_munmap+0x59/0x80 [ 60.603346] do_syscall_64+0x3f/0x90 [ 60.603819] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.604484] [ 60.604700] Second to last potentially related work creation: [ 60.605392] kasan_save_stack+0x22/0x50 [ 60.605898] __kasan_record_aux_stack+0x8e/0xa0 [ 60.606475] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.607114] remove_vma+0x139/0x170 [ 60.607567] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.608134] do_vmi_munmap+0x1f1/0x2b0 [ 60.608619] mmap_region+0x1f9/0x2660 [ 60.609094] do_mmap+0x854/0xf00 [ 60.609523] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.610008] ksys_mmap_pgoff+0x7d/0x500 [ 60.610499] do_syscall_64+0x3f/0x90 [ 60.610972] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.611615] [ 60.611832] The buggy address belongs to the object at ffff88800d8739f8 [ 60.611832] which belongs to the cache vm_area_struct of size 168 [ 60.613318] The buggy address is located 88 bytes inside of [ 60.613318] freed 168-byte region [ffff88800d8739f8, ffff88800d873aa0) [ 60.614715] [ 60.614936] The buggy address belongs to the physical page: [ 60.615592] page:0000000074c615db refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd873 [ 60.616684] memcg:ffff8880140aed01 [ 60.617110] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.617754] page_type: 0xffffffff() [ 60.618204] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 60.619134] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880140aed01 [ 60.620049] page dumped because: kasan: bad access detected [ 60.620706] [ 60.620923] Memory state around the buggy address: [ 60.621507] ffff88800d873900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 60.622363] ffff88800d873980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 60.623219] >ffff88800d873a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.624102] ^ [ 60.624805] ffff88800d873a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 60.625666] ffff88800d873b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 60.626522] ================================================================== [ 60.627442] Disabling lock debugging due to kernel taint [ 62.790515] BUG: Bad rss-counter state mm:00000000a267bc2c type:MM_FILEPAGES val:33 [ 62.791589] BUG: Bad rss-counter state mm:00000000a267bc2c type:MM_ANONPAGES val:22 [ 63.311115] BUG: Bad rss-counter state mm:00000000015af383 type:MM_FILEPAGES val:33 [ 63.312334] BUG: Bad rss-counter state mm:00000000015af383 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25473' (ECDSA) to the list of known hosts. 2023/06/21 00:45:51 fuzzer started 2023/06/21 00:45:52 dialing manager at localhost:36067 2023/06/21 00:45:52 checking machine... 2023/06/21 00:45:52 checking revisions... [ 63.941330] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:45:52 testing simple program... [ 63.992167] cgroup: Unknown subsys name 'net' [ 64.049639] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:45:51 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007f55d2844da0 CR3=00000000094d2000 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=2031353a35343a3030203132206e754a XMM01=6964206465766965636552203a5d3133 XMM02=6f63736964203a31313a363532363320 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031353a35343a3030203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff818df6d3 RBX=ffff8880165c79a8 RCX=ffffffff863b2b01 RDX=1ffff11002cb8f40 RSI=0000000000000000 RDI=ffffffff818df6d3 RBP=ffff8880165c7a00 RSP=ffff8880165c7990 R8 =ffffffff863b2b1a R9 =ffff8880165c79e8 R10=0000000000038001 R11=000000000008a79f R12=ffff8880165c7a70 R13=0000000000000000 R14=ffff88800ffb1b40 R15=0000000000000cc0 RIP=ffffffff811303b8 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 00007f7c339af900 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=00007f7c33f670b0 CR3=0000000016ffc000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000