syzkaller login: [ 30.783433] BUG: Bad rss-counter state mm:00000000af71262e type:MM_FILEPAGES val:33 [ 30.784716] BUG: Bad rss-counter state mm:00000000af71262e type:MM_ANONPAGES val:22 [ 30.828417] ================================================================== [ 30.830047] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.831252] Read of size 8 at addr ffff88800eb49228 by task sshd/219 [ 30.832297] [ 30.832582] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.833719] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.835002] Call Trace: [ 30.835430] [ 30.835798] dump_stack_lvl+0x91/0xf0 [ 30.836424] print_report+0xcc/0x620 [ 30.837053] ? __virt_addr_valid+0x102/0x340 [ 30.837760] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.838560] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.839347] kasan_report+0xbe/0xf0 [ 30.839955] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.840759] vma_interval_tree_remove+0xc75/0xec0 [ 30.841570] vma_prepare+0xc54/0x11a0 [ 30.842193] __split_vma+0x5af/0x950 [ 30.842803] ? __pfx___split_vma+0x10/0x10 [ 30.843487] ? find_held_lock+0x2c/0x110 [ 30.844165] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.844895] ? lock_is_held_type+0x9f/0x120 [ 30.845600] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.846370] ? mtree_range_walk+0x632/0x900 [ 30.847079] ? mas_walk+0x5c7/0x7c0 [ 30.847688] do_vmi_munmap+0x1f1/0x2b0 [ 30.848315] mmap_region+0x1f9/0x2660 [ 30.848936] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.849627] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.850556] ? __pfx_lock_acquire+0x10/0x10 [ 30.851240] ? __pfx_mmap_region+0x10/0x10 [ 30.851921] ? security_mmap_addr+0x7d/0xa0 [ 30.852604] ? get_unmapped_area+0x1f5/0x3f0 [ 30.853329] do_mmap+0x854/0xf00 [ 30.853890] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.854524] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.855259] ksys_mmap_pgoff+0x3af/0x500 [ 30.855920] do_syscall_64+0x3f/0x90 [ 30.856541] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.857384] RIP: 0033:0x7fc413247d82 [ 30.857967] 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 [ 30.860303] RSP: 002b:00007ffea5e5b748 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.861243] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc413247d82 [ 30.862088] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc412681000 [ 30.862929] RBP: 00007fc412681000 R08: 0000000000000009 R09: 0000000000001000 [ 30.863773] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c69e835ec0 [ 30.864621] R13: 00007ffea5e5b760 R14: 00007ffea5e5b790 R15: 00007ffea5e5baf0 [ 30.865500] [ 30.865795] [ 30.866014] Allocated by task 212: [ 30.866448] kasan_save_stack+0x22/0x50 [ 30.866957] kasan_set_track+0x25/0x30 [ 30.867458] __kasan_slab_alloc+0x59/0x70 [ 30.867987] kmem_cache_alloc+0x16b/0x370 [ 30.868516] vm_area_dup+0x20/0x160 [ 30.868975] __split_vma+0x170/0x950 [ 30.869545] split_vma+0xc6/0x110 [ 30.870001] mprotect_fixup+0x8d2/0xb30 [ 30.870516] do_mprotect_pkey+0x87e/0xd40 [ 30.871047] __x64_sys_mprotect+0x78/0xc0 [ 30.871591] do_syscall_64+0x3f/0x90 [ 30.872077] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.872744] [ 30.872966] Freed by task 212: [ 30.873397] kasan_save_stack+0x22/0x50 [ 30.873917] kasan_set_track+0x25/0x30 [ 30.874423] kasan_save_free_info+0x2b/0x50 [ 30.874972] __kasan_slab_free+0x10a/0x190 [ 30.875527] kmem_cache_free+0x10d/0x4d0 [ 30.876060] rcu_core+0x8c8/0x2860 [ 30.876515] __do_softirq+0x1b7/0x7d4 [ 30.877021] [ 30.877260] Last potentially related work creation: [ 30.877862] kasan_save_stack+0x22/0x50 [ 30.878380] __kasan_record_aux_stack+0x8e/0xa0 [ 30.878971] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.879629] remove_vma+0x139/0x170 [ 30.880101] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.880674] do_vmi_munmap+0x1f1/0x2b0 [ 30.881199] __vm_munmap+0x138/0x3a0 [ 30.881685] __x64_sys_munmap+0x59/0x80 [ 30.882188] do_syscall_64+0x3f/0x90 [ 30.882676] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.883336] [ 30.883556] Second to last potentially related work creation: [ 30.884261] kasan_save_stack+0x22/0x50 [ 30.884781] __kasan_record_aux_stack+0x8e/0xa0 [ 30.885387] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.886046] remove_vma+0x139/0x170 [ 30.886509] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.887107] do_vmi_munmap+0x1f1/0x2b0 [ 30.887626] mmap_region+0x1f9/0x2660 [ 30.888146] do_mmap+0x854/0xf00 [ 30.888619] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.889156] ksys_mmap_pgoff+0x3af/0x500 [ 30.889699] do_syscall_64+0x3f/0x90 [ 30.890221] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.890913] [ 30.891142] The buggy address belongs to the object at ffff88800eb491d0 [ 30.891142] which belongs to the cache vm_area_struct of size 168 [ 30.892717] The buggy address is located 88 bytes inside of [ 30.892717] freed 168-byte region [ffff88800eb491d0, ffff88800eb49278) [ 30.894219] [ 30.894452] The buggy address belongs to the physical page: [ 30.895156] page:00000000c380d0fb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb49 [ 30.896326] memcg:ffff88800de63d01 [ 30.896787] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.897493] page_type: 0xffffffff() [ 30.897982] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b7140 dead000000000006 [ 30.898971] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de63d01 [ 30.899939] page dumped because: kasan: bad access detected [ 30.900647] [ 30.900880] Memory state around the buggy address: [ 30.901501] ffff88800eb49100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.902436] ffff88800eb49180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.903363] >ffff88800eb49200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.904293] ^ [ 30.904885] ffff88800eb49280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.905806] ffff88800eb49300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.906699] ================================================================== [ 30.907758] Disabling lock debugging due to kernel taint [ 32.774189] BUG: Bad rss-counter state mm:00000000b09de0f3 type:MM_FILEPAGES val:33 [ 32.775076] BUG: Bad rss-counter state mm:00000000b09de0f3 type:MM_ANONPAGES val:22 [ 33.325451] BUG: Bad rss-counter state mm:00000000c5397057 type:MM_FILEPAGES val:33 [ 33.326623] BUG: Bad rss-counter state mm:00000000c5397057 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55155' (ECDSA) to the list of known hosts. 2023/06/21 05:47:04 fuzzer started 2023/06/21 05:47:04 dialing manager at localhost:36067 2023/06/21 05:47:04 checking machine... 2023/06/21 05:47:04 checking revisions... [ 33.937914] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:47:04 testing simple program... [ 33.985757] cgroup: Unknown subsys name 'net' [ 34.016295] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:47:04 Registers: info registers vcpu 0 RAX=ffff888014572800 RBX=ffff88800dc32068 RCX=1ffff11001b86414 RDX=dffffc0000000000 RSI=ffff888016012500 RDI=ffff88800dc320a0 RBP=ffff88800dc32078 RSP=ffff88800ff17380 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff888016012400 R13=0000000000000000 R14=ffff88800d32d178 R15=ffff88800d32d130 RIP=ffffffff818476ad RFL=00000087 [--S--PC] 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 00007fdda8523900 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=00007fdda84e8008 CR3=000000000ce94000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f68cbdc94d0 CR3=000000001393a000 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=69e20892f70c48992247de9dcb72caf6 XMM02=000000000011a7e8eff9b2d0a8fce9cb XMM03=000000000011a8b82c67c8bc2e329bc3 XMM04=fe9ac04b6d62331b00000000000ae988 XMM05=dfcdbad4f1609c370000000000133320 XMM06=8a891aa88fa1b9520000000000132188 XMM07=e042d86d42eb936e0000000000122420 XMM08=098bb9d26d285a48000000000011a8b8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000