syzkaller login: [ 38.689775] BUG: Bad rss-counter state mm:000000009137c557 type:MM_FILEPAGES val:33 [ 38.690851] BUG: Bad rss-counter state mm:000000009137c557 type:MM_ANONPAGES val:22 [ 38.811650] ================================================================== [ 38.812695] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.813798] Read of size 8 at addr ffff88800e56cb38 by task sshd/219 [ 38.814772] [ 38.815001] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.815878] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.816904] Call Trace: [ 38.817230] [ 38.817527] dump_stack_lvl+0x91/0xf0 [ 38.818046] print_report+0xcc/0x620 [ 38.818532] ? __virt_addr_valid+0x102/0x340 [ 38.819077] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.819695] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.820314] kasan_report+0xbe/0xf0 [ 38.820789] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.821422] vma_interval_tree_remove+0xc75/0xec0 [ 38.822055] vma_prepare+0xc54/0x11a0 [ 38.822547] __split_vma+0x5af/0x950 [ 38.823039] ? __pfx___split_vma+0x10/0x10 [ 38.823589] ? find_held_lock+0x2c/0x110 [ 38.824126] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.824705] ? lock_is_held_type+0x9f/0x120 [ 38.825261] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.825905] ? mtree_range_walk+0x632/0x900 [ 38.826486] ? mas_walk+0x5c7/0x7c0 [ 38.826979] do_vmi_munmap+0x1f1/0x2b0 [ 38.827486] mmap_region+0x1f9/0x2660 [ 38.827984] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.828520] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.829254] ? __pfx_lock_acquire+0x10/0x10 [ 38.829852] ? __pfx_mmap_region+0x10/0x10 [ 38.830396] ? security_mmap_addr+0x7d/0xa0 [ 38.830950] ? get_unmapped_area+0x1f5/0x3f0 [ 38.831527] do_mmap+0x854/0xf00 [ 38.831980] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.832482] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.833052] ksys_mmap_pgoff+0x3af/0x500 [ 38.833553] do_syscall_64+0x3f/0x90 [ 38.834065] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.834718] RIP: 0033:0x7f83e4294d82 [ 38.835173] 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 [ 38.837352] RSP: 002b:00007ffc37395208 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.838276] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f83e4294d82 [ 38.839153] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f83e36ce000 [ 38.840057] RBP: 00007f83e36ce000 R08: 0000000000000009 R09: 0000000000001000 [ 38.840948] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f7f7d8ad90 [ 38.841848] R13: 00007ffc37395220 R14: 00007ffc37395250 R15: 00007ffc373955b0 [ 38.842769] [ 38.843080] [ 38.843308] Allocated by task 212: [ 38.843771] kasan_save_stack+0x22/0x50 [ 38.844298] kasan_set_track+0x25/0x30 [ 38.844827] __kasan_slab_alloc+0x59/0x70 [ 38.845393] kmem_cache_alloc+0x16b/0x370 [ 38.845960] vm_area_dup+0x20/0x160 [ 38.846425] __split_vma+0x170/0x950 [ 38.846913] split_vma+0xc6/0x110 [ 38.847368] mprotect_fixup+0x8d2/0xb30 [ 38.847868] do_mprotect_pkey+0x87e/0xd40 [ 38.848389] __x64_sys_mprotect+0x78/0xc0 [ 38.848909] do_syscall_64+0x3f/0x90 [ 38.849391] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.850094] [ 38.850319] Freed by task 203: [ 38.850716] kasan_save_stack+0x22/0x50 [ 38.851217] kasan_set_track+0x25/0x30 [ 38.851720] kasan_save_free_info+0x2b/0x50 [ 38.852252] __kasan_slab_free+0x10a/0x190 [ 38.852785] kmem_cache_free+0x10d/0x4d0 [ 38.853289] rcu_core+0x8c8/0x2860 [ 38.853741] __do_softirq+0x1b7/0x7d4 [ 38.854228] [ 38.854453] Last potentially related work creation: [ 38.855117] kasan_save_stack+0x22/0x50 [ 38.855627] __kasan_record_aux_stack+0x8e/0xa0 [ 38.856206] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.856855] remove_vma+0x139/0x170 [ 38.857306] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.857876] do_vmi_munmap+0x1f1/0x2b0 [ 38.858364] __vm_munmap+0x138/0x3a0 [ 38.858836] __x64_sys_munmap+0x59/0x80 [ 38.859332] do_syscall_64+0x3f/0x90 [ 38.859811] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.860467] [ 38.860682] The buggy address belongs to the object at ffff88800e56cae0 [ 38.860682] which belongs to the cache vm_area_struct of size 168 [ 38.862241] The buggy address is located 88 bytes inside of [ 38.862241] freed 168-byte region [ffff88800e56cae0, ffff88800e56cb88) [ 38.863712] [ 38.863933] The buggy address belongs to the physical page: [ 38.864630] page:0000000062acb4d4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe56c [ 38.865785] memcg:ffff88800e753001 [ 38.866225] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.866900] page_type: 0xffffffff() [ 38.867368] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b04c0 dead000000000004 [ 38.868329] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e753001 [ 38.869276] page dumped because: kasan: bad access detected [ 38.869969] [ 38.870194] Memory state around the buggy address: [ 38.870810] ffff88800e56ca00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.871711] ffff88800e56ca80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 38.872588] >ffff88800e56cb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.873438] ^ [ 38.874085] ffff88800e56cb80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 38.874974] ffff88800e56cc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 38.875835] ================================================================== [ 38.876757] Disabling lock debugging due to kernel taint [ 40.794751] BUG: Bad rss-counter state mm:0000000050b60997 type:MM_FILEPAGES val:33 [ 40.795702] BUG: Bad rss-counter state mm:0000000050b60997 type:MM_ANONPAGES val:22 [ 41.332085] BUG: Bad rss-counter state mm:000000003b1dc898 type:MM_FILEPAGES val:33 [ 41.333263] BUG: Bad rss-counter state mm:000000003b1dc898 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60979' (ECDSA) to the list of known hosts. 2023/06/20 23:57:40 fuzzer started 2023/06/20 23:57:40 dialing manager at localhost:36067 2023/06/20 23:57:40 checking machine... 2023/06/20 23:57:40 checking revisions... [ 41.975804] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:57:40 testing simple program... [ 42.018834] cgroup: Unknown subsys name 'net' [ 42.068934] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:57:40 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800ca53be0 RCX=ffffffff812e0135 RDX=0000000000000001 RSI=0000000000000004 RDI=ffff888013fef828 RBP=1ffff110027fdf01 RSP=ffff888013fef800 R8 =0000000000000001 R9 =ffffed10027fdf05 R10=0000000000000003 R11=00000000000b6a61 R12=ffff88800ca53be8 R13=ffff88800ca53bf0 R14=ffffffff8367562f R15=ffff88800c9e8880 RIP=ffffffff812e0146 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 00007f5d89bc6900 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=00007fd9fb007650 CR3=000000000edc8000 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=01c92a885ec287b0174524c6536a1271 XMM02=eff9b2d0a8fce9cb000000000011b3a0 XMM03=2c67c8bc2e329bc3000000000011b4c8 XMM04=4b11f24beddc0cda00000000000ae988 XMM05=45145f7f657f35540000000000132e48 XMM06=dfcdbad4f1609c370000000000131970 XMM07=fb795ef6d65770560000000000121e68 XMM08=2c67c8bc2e329bc3000000000011b4c8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007ffeb9f97798 CR3=000000000dfba000 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=2030343a37353a3332203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039333a37353a3332203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000