syzkaller login: [ 41.803403] BUG: Bad rss-counter state mm:00000000fdd4c000 type:MM_FILEPAGES val:33 [ 41.804643] BUG: Bad rss-counter state mm:00000000fdd4c000 type:MM_ANONPAGES val:22 [ 41.849194] ================================================================== [ 41.850166] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.851247] Read of size 8 at addr ffff88800f003c20 by task sshd/220 [ 41.852078] [ 41.852319] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.853246] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.854298] Call Trace: [ 41.854643] [ 41.854952] dump_stack_lvl+0x91/0xf0 [ 41.855480] print_report+0xcc/0x620 [ 41.856007] ? __virt_addr_valid+0x102/0x340 [ 41.856608] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.857272] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.857935] kasan_report+0xbe/0xf0 [ 41.858444] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.859102] vma_interval_tree_remove+0xc75/0xec0 [ 41.859767] vma_prepare+0xc54/0x11a0 [ 41.860290] __split_vma+0x5af/0x950 [ 41.860792] ? __pfx___split_vma+0x10/0x10 [ 41.861351] ? find_held_lock+0x2c/0x110 [ 41.861914] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.862510] ? lock_is_held_type+0x9f/0x120 [ 41.863092] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.863748] ? mtree_range_walk+0x632/0x900 [ 41.864348] ? mas_walk+0x5c7/0x7c0 [ 41.864853] do_vmi_munmap+0x1f1/0x2b0 [ 41.865383] mmap_region+0x1f9/0x2660 [ 41.865898] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.866437] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.867198] ? __pfx_lock_acquire+0x10/0x10 [ 41.867786] ? __pfx_mmap_region+0x10/0x10 [ 41.868355] ? security_mmap_addr+0x7d/0xa0 [ 41.868925] ? get_unmapped_area+0x1f5/0x3f0 [ 41.869514] do_mmap+0x854/0xf00 [ 41.869989] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.870517] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.871127] ksys_mmap_pgoff+0x3af/0x500 [ 41.871681] do_syscall_64+0x3f/0x90 [ 41.872199] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.872887] RIP: 0033:0x7f755da31d82 [ 41.873379] 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 [ 41.875676] RSP: 002b:00007ffda05c8158 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.876654] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f755da31d82 [ 41.877585] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f755ce6b000 [ 41.878498] RBP: 00007f755ce6b000 R08: 0000000000000009 R09: 0000000000001000 [ 41.879410] R10: 0000000000000812 R11: 0000000000000206 R12: 000056534c5c2ec0 [ 41.880335] R13: 00007ffda05c8170 R14: 00007ffda05c81a0 R15: 00007ffda05c8500 [ 41.881290] [ 41.881602] [ 41.881836] Allocated by task 213: [ 41.882303] kasan_save_stack+0x22/0x50 [ 41.882851] kasan_set_track+0x25/0x30 [ 41.883383] __kasan_slab_alloc+0x59/0x70 [ 41.883958] kmem_cache_alloc+0x16b/0x370 [ 41.884509] vm_area_dup+0x20/0x160 [ 41.885007] __split_vma+0x170/0x950 [ 41.885517] split_vma+0xc6/0x110 [ 41.885994] mprotect_fixup+0x8d2/0xb30 [ 41.886533] do_mprotect_pkey+0x87e/0xd40 [ 41.887102] __x64_sys_mprotect+0x78/0xc0 [ 41.887670] do_syscall_64+0x3f/0x90 [ 41.888184] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.888882] [ 41.889118] Freed by task 203: [ 41.889540] kasan_save_stack+0x22/0x50 [ 41.890087] kasan_set_track+0x25/0x30 [ 41.890617] kasan_save_free_info+0x2b/0x50 [ 41.891191] __kasan_slab_free+0x10a/0x190 [ 41.891779] kmem_cache_free+0x10d/0x4d0 [ 41.892326] rcu_core+0x8c8/0x2860 [ 41.892803] __do_softirq+0x1b7/0x7d4 [ 41.893317] [ 41.893548] Last potentially related work creation: [ 41.894190] kasan_save_stack+0x22/0x50 [ 41.894743] __kasan_record_aux_stack+0x8e/0xa0 [ 41.895360] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.896071] remove_vma+0x139/0x170 [ 41.896556] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.897162] do_vmi_munmap+0x1f1/0x2b0 [ 41.897692] __vm_munmap+0x138/0x3a0 [ 41.898204] __x64_sys_munmap+0x59/0x80 [ 41.898743] do_syscall_64+0x3f/0x90 [ 41.899251] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.899963] [ 41.900195] The buggy address belongs to the object at ffff88800f003bc8 [ 41.900195] which belongs to the cache vm_area_struct of size 168 [ 41.901757] The buggy address is located 88 bytes inside of [ 41.901757] freed 168-byte region [ffff88800f003bc8, ffff88800f003c70) [ 41.903252] [ 41.903484] The buggy address belongs to the physical page: [ 41.904206] page:000000008ea518b0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf003 [ 41.905358] memcg:ffff88800d9a7101 [ 41.905815] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.906500] page_type: 0xffffffff() [ 41.906982] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 41.907989] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d9a7101 [ 41.908952] page dumped because: kasan: bad access detected [ 41.909660] [ 41.909892] Memory state around the buggy address: [ 41.910508] ffff88800f003b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.911418] ffff88800f003b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 41.912331] >ffff88800f003c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 41.913236] ^ [ 41.913795] ffff88800f003c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 41.914706] ffff88800f003d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 41.915614] ================================================================== [ 41.917216] Disabling lock debugging due to kernel taint [ 44.359903] BUG: Bad rss-counter state mm:00000000e36923a0 type:MM_FILEPAGES val:33 [ 44.361137] BUG: Bad rss-counter state mm:00000000e36923a0 type:MM_ANONPAGES val:22 [ 44.855224] BUG: Bad rss-counter state mm:000000004be52cf5 type:MM_FILEPAGES val:33 [ 44.856531] BUG: Bad rss-counter state mm:000000004be52cf5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51324' (ECDSA) to the list of known hosts. 2023/06/20 09:22:03 fuzzer started 2023/06/20 09:22:04 dialing manager at localhost:44161 2023/06/20 09:22:04 checking machine... 2023/06/20 09:22:04 checking revisions... [ 45.529835] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:22:04 testing simple program... [ 45.602120] cgroup: Unknown subsys name 'net' [ 45.678076] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:21:52 Registers: info registers vcpu 0 RAX=0000000080010002 RBX=ffffffff87b69480 RCX=ffffffff813c64fa RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88806ce09ca8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=ffffffff87b69510 R14=176a539811a78e00 R15=ffffffff87b694a8 RIP=ffffffff814c01d0 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 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=00007fe13f7f56f0 CR3=000000000c6d0000 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=9d8dbc5f0925a1ae86415cc6de2e0e12 XMM02=000000000011cf30eff9b2d0a8fce9cb XMM03=000000000011d0002c67c8bc2e329bc3 XMM04=25418e4cb26387b300000000000ae988 XMM05=e4cb8bb95a7664b60000000000134000 XMM06=81ca1dc33ebc92940000000000132e68 XMM07=e042d86d42eb936e0000000000124798 XMM08=300f861d41b69a96000000000011d000 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=a7f4a1b7aa1d2f00 RBX=ffffed1002de0f6f RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000001 RSP=ffff888016f07b68 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffff888016297460 R15=0000000000000000 RIP=ffffffff812d8ff1 RFL=00000286 [--S--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 00007f3600051900 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=00007fff09b24000 CR3=0000000015a18000 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=6720646572637465733a4d41503d706f 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