syzkaller login: [ 30.589279] BUG: Bad rss-counter state mm:00000000f0c0e929 type:MM_FILEPAGES val:33 [ 30.590469] BUG: Bad rss-counter state mm:00000000f0c0e929 type:MM_ANONPAGES val:22 [ 30.765945] ================================================================== [ 30.766874] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.767837] Read of size 8 at addr ffff8880169ed140 by task sshd/221 [ 30.768742] [ 30.768963] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.769838] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.770870] Call Trace: [ 30.771199] [ 30.771488] dump_stack_lvl+0x91/0xf0 [ 30.772003] print_report+0xcc/0x620 [ 30.772503] ? __virt_addr_valid+0x102/0x340 [ 30.773071] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.773713] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.774346] kasan_report+0xbe/0xf0 [ 30.774840] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.775474] vma_interval_tree_remove+0xc75/0xec0 [ 30.776096] vma_prepare+0xc54/0x11a0 [ 30.776584] __split_vma+0x5af/0x950 [ 30.777062] ? __pfx___split_vma+0x10/0x10 [ 30.777595] ? find_held_lock+0x2c/0x110 [ 30.778138] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.778716] ? lock_is_held_type+0x9f/0x120 [ 30.779263] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.779889] ? mtree_range_walk+0x632/0x900 [ 30.780465] ? mas_walk+0x5c7/0x7c0 [ 30.780960] do_vmi_munmap+0x1f1/0x2b0 [ 30.781453] mmap_region+0x1f9/0x2660 [ 30.781943] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.782469] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.783188] ? __pfx_lock_acquire+0x10/0x10 [ 30.783732] ? __pfx_mmap_region+0x10/0x10 [ 30.784264] ? security_mmap_addr+0x7d/0xa0 [ 30.784791] ? get_unmapped_area+0x1f5/0x3f0 [ 30.785345] do_mmap+0x854/0xf00 [ 30.785797] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.786311] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.786905] ksys_mmap_pgoff+0x3af/0x500 [ 30.787445] do_syscall_64+0x3f/0x90 [ 30.787970] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.788651] RIP: 0033:0x7fa1c7513d82 [ 30.789115] 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 [ 30.791322] RSP: 002b:00007ffc1ab5ea78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.792245] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa1c7513d82 [ 30.793128] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa1c694d000 [ 30.794018] RBP: 00007fa1c694d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.794884] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cf13a38ec0 [ 30.795785] R13: 00007ffc1ab5ea90 R14: 00007ffc1ab5eac0 R15: 00007ffc1ab5ee20 [ 30.796663] [ 30.796964] [ 30.797187] Allocated by task 214: [ 30.797631] kasan_save_stack+0x22/0x50 [ 30.798154] kasan_set_track+0x25/0x30 [ 30.798664] __kasan_slab_alloc+0x59/0x70 [ 30.799206] kmem_cache_alloc+0x16b/0x370 [ 30.799742] vm_area_dup+0x20/0x160 [ 30.800208] __split_vma+0x170/0x950 [ 30.800684] split_vma+0xc6/0x110 [ 30.801136] mprotect_fixup+0x8d2/0xb30 [ 30.801654] do_mprotect_pkey+0x87e/0xd40 [ 30.802185] __x64_sys_mprotect+0x78/0xc0 [ 30.802715] do_syscall_64+0x3f/0x90 [ 30.803200] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.803874] [ 30.804091] Freed by task 204: [ 30.804514] kasan_save_stack+0x22/0x50 [ 30.805026] kasan_set_track+0x25/0x30 [ 30.805536] kasan_save_free_info+0x2b/0x50 [ 30.806095] __kasan_slab_free+0x10a/0x190 [ 30.806652] kmem_cache_free+0x10d/0x4d0 [ 30.807175] rcu_core+0x8c8/0x2860 [ 30.807620] __do_softirq+0x1b7/0x7d4 [ 30.808115] [ 30.808330] Last potentially related work creation: [ 30.808919] kasan_save_stack+0x22/0x50 [ 30.809443] __kasan_record_aux_stack+0x8e/0xa0 [ 30.810023] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.810663] remove_vma+0x139/0x170 [ 30.811113] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.811694] do_vmi_munmap+0x1f1/0x2b0 [ 30.812202] __vm_munmap+0x138/0x3a0 [ 30.812669] __x64_sys_munmap+0x59/0x80 [ 30.813167] do_syscall_64+0x3f/0x90 [ 30.813643] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.814287] [ 30.814500] The buggy address belongs to the object at ffff8880169ed0e8 [ 30.814500] which belongs to the cache vm_area_struct of size 168 [ 30.816017] The buggy address is located 88 bytes inside of [ 30.816017] freed 168-byte region [ffff8880169ed0e8, ffff8880169ed190) [ 30.817454] [ 30.817671] The buggy address belongs to the physical page: [ 30.818374] page:00000000b6073505 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x169ed [ 30.819529] memcg:ffff88800e184a01 [ 30.819985] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.820664] page_type: 0xffffffff() [ 30.821129] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.822073] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e184a01 [ 30.822984] page dumped because: kasan: bad access detected [ 30.823647] [ 30.823875] Memory state around the buggy address: [ 30.824454] ffff8880169ed000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.825338] ffff8880169ed080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.826296] >ffff8880169ed100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.827294] ^ [ 30.828069] ffff8880169ed180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.829091] ffff8880169ed200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.830109] ================================================================== [ 30.831541] Disabling lock debugging due to kernel taint [ 33.314772] BUG: Bad rss-counter state mm:00000000aa2679b8 type:MM_FILEPAGES val:33 [ 33.316164] BUG: Bad rss-counter state mm:00000000aa2679b8 type:MM_ANONPAGES val:22 [ 33.727566] BUG: Bad rss-counter state mm:000000003e715787 type:MM_FILEPAGES val:33 [ 33.728911] BUG: Bad rss-counter state mm:000000003e715787 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59267' (ECDSA) to the list of known hosts. 2023/06/20 17:25:34 fuzzer started 2023/06/20 17:25:34 dialing manager at localhost:36067 2023/06/20 17:25:34 checking machine... 2023/06/20 17:25:34 checking revisions... [ 34.277311] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:25:34 testing simple program... [ 34.321989] cgroup: Unknown subsys name 'net' [ 34.367573] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:25:34 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=00007f5b4437c250 CR3=00000000146f6000 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=2034333a35323a3731203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033333a35323a3731203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000001255 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff8171af19 RDI=ffff88800e28ba74 RBP=0000000000000000 RSP=ffff888016507e70 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=00007fab34bcd44c R14=ffff88800e034da8 R15=0000000000000040 RIP=ffffffff814c086b RFL=00000293 [--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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fab34b11900 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=00007fab34bcd44c CR3=000000000da36000 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