syzkaller login: [ 57.458285] BUG: Bad rss-counter state mm:000000001153cdc6 type:MM_FILEPAGES val:33 [ 57.459300] BUG: Bad rss-counter state mm:000000001153cdc6 type:MM_ANONPAGES val:22 [ 57.628197] ================================================================== [ 57.629104] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 57.630044] Read of size 8 at addr ffff88800cf6cc20 by task sshd/220 [ 57.630818] [ 57.631038] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 57.632019] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 57.632993] Call Trace: [ 57.633315] [ 57.633625] dump_stack_lvl+0x91/0xf0 [ 57.634116] print_report+0xcc/0x620 [ 57.634606] ? __virt_addr_valid+0x102/0x340 [ 57.635159] ? vma_interval_tree_remove+0xc75/0xec0 [ 57.635793] ? vma_interval_tree_remove+0xc75/0xec0 [ 57.636416] kasan_report+0xbe/0xf0 [ 57.636896] ? vma_interval_tree_remove+0xc75/0xec0 [ 57.637521] vma_interval_tree_remove+0xc75/0xec0 [ 57.638128] vma_prepare+0xc54/0x11a0 [ 57.638612] __split_vma+0x5af/0x950 [ 57.639085] ? __pfx___split_vma+0x10/0x10 [ 57.639619] ? find_held_lock+0x2c/0x110 [ 57.640151] do_vmi_align_munmap+0x2ba/0x11f0 [ 57.640722] ? lock_is_held_type+0x9f/0x120 [ 57.641258] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 57.641868] ? mtree_range_walk+0x632/0x900 [ 57.642426] ? mas_walk+0x5c7/0x7c0 [ 57.642906] do_vmi_munmap+0x1f1/0x2b0 [ 57.643407] mmap_region+0x1f9/0x2660 [ 57.643907] ? vm_mmap_pgoff+0x15c/0x3a0 [ 57.644426] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 57.645147] ? __pfx_lock_acquire+0x10/0x10 [ 57.645684] ? __pfx_mmap_region+0x10/0x10 [ 57.646214] ? security_mmap_addr+0x7d/0xa0 [ 57.646752] ? get_unmapped_area+0x1f5/0x3f0 [ 57.647316] do_mmap+0x854/0xf00 [ 57.647772] vm_mmap_pgoff+0x1a6/0x3a0 [ 57.648277] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 57.648848] ksys_mmap_pgoff+0x3af/0x500 [ 57.649357] do_syscall_64+0x3f/0x90 [ 57.649836] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 57.650488] RIP: 0033:0x7fa2c7564d82 [ 57.650952] 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 [ 57.653112] RSP: 002b:00007fffa7eacf08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 57.654029] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa2c7564d82 [ 57.654889] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa2c699e000 [ 57.655756] RBP: 00007fa2c699e000 R08: 0000000000000009 R09: 0000000000001000 [ 57.656607] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fac6b76f70 [ 57.657461] R13: 00007fffa7eacf20 R14: 00007fffa7eacf50 R15: 00007fffa7ead2b0 [ 57.658331] [ 57.658627] [ 57.658846] Allocated by task 213: [ 57.659281] kasan_save_stack+0x22/0x50 [ 57.659795] kasan_set_track+0x25/0x30 [ 57.660293] __kasan_slab_alloc+0x59/0x70 [ 57.660820] kmem_cache_alloc+0x16b/0x370 [ 57.661334] vm_area_dup+0x20/0x160 [ 57.661794] __split_vma+0x170/0x950 [ 57.662262] split_vma+0xc6/0x110 [ 57.662708] mprotect_fixup+0x8d2/0xb30 [ 57.663212] do_mprotect_pkey+0x87e/0xd40 [ 57.663751] __x64_sys_mprotect+0x78/0xc0 [ 57.664278] do_syscall_64+0x3f/0x90 [ 57.664770] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 57.665408] [ 57.665632] Freed by task 213: [ 57.666033] kasan_save_stack+0x22/0x50 [ 57.666542] kasan_set_track+0x25/0x30 [ 57.667039] kasan_save_free_info+0x2b/0x50 [ 57.667580] __kasan_slab_free+0x10a/0x190 [ 57.668129] kmem_cache_free+0x10d/0x4d0 [ 57.668645] rcu_core+0x8c8/0x2860 [ 57.669094] __do_softirq+0x1b7/0x7d4 [ 57.669586] [ 57.669807] Last potentially related work creation: [ 57.670404] kasan_save_stack+0x22/0x50 [ 57.670921] __kasan_record_aux_stack+0x8e/0xa0 [ 57.671508] __call_rcu_common.constprop.0+0x6a/0xb90 [ 57.672161] remove_vma+0x139/0x170 [ 57.672614] do_vmi_align_munmap+0xd4a/0x11f0 [ 57.673181] do_vmi_munmap+0x1f1/0x2b0 [ 57.673679] __vm_munmap+0x138/0x3a0 [ 57.674161] __x64_sys_munmap+0x59/0x80 [ 57.674658] do_syscall_64+0x3f/0x90 [ 57.675145] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 57.675809] [ 57.676027] The buggy address belongs to the object at ffff88800cf6cbc8 [ 57.676027] which belongs to the cache vm_area_struct of size 168 [ 57.677506] The buggy address is located 88 bytes inside of [ 57.677506] freed 168-byte region [ffff88800cf6cbc8, ffff88800cf6cc70) [ 57.678919] [ 57.679139] The buggy address belongs to the physical page: [ 57.679809] page:00000000a168a73f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcf6c [ 57.680897] memcg:ffff88800d7e8201 [ 57.681328] flags: 0x100000000000200(slab|node=0|zone=1) [ 57.681977] page_type: 0xffffffff() [ 57.682427] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 57.683352] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d7e8201 [ 57.684284] page dumped because: kasan: bad access detected [ 57.684947] [ 57.685165] Memory state around the buggy address: [ 57.685747] ffff88800cf6cb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 57.686617] ffff88800cf6cb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 57.687479] >ffff88800cf6cc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 57.688347] ^ [ 57.688886] ffff88800cf6cc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 57.689742] ffff88800cf6cd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 57.690598] ================================================================== [ 57.691697] Disabling lock debugging due to kernel taint [ 59.572242] BUG: Bad rss-counter state mm:000000003cacabc1 type:MM_FILEPAGES val:33 [ 59.573058] BUG: Bad rss-counter state mm:000000003cacabc1 type:MM_ANONPAGES val:22 [ 59.990315] BUG: Bad rss-counter state mm:00000000f73767aa type:MM_FILEPAGES val:33 [ 59.991067] BUG: Bad rss-counter state mm:00000000f73767aa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31235' (ECDSA) to the list of known hosts. 2023/06/19 14:44:18 fuzzer started 2023/06/19 14:44:18 dialing manager at localhost:44161 2023/06/19 14:44:18 checking machine... 2023/06/19 14:44:18 checking revisions... [ 60.690103] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:44:18 testing simple program... [ 60.748697] cgroup: Unknown subsys name 'net' [ 60.780181] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:44:14 Registers: info registers vcpu 0 RAX=ffffffff8180c522 RBX=ffffffff813ad420 RCX=ffffffff860d6801 RDX=1ffff11003061f5f RSI=ffffffff8180c522 RDI=ffff88801830fb68 RBP=ffff88801830fb38 RSP=ffff88801830fa98 R8 =ffffffff860d68fa R9 =ffff88801830fae0 R10=0000000000038001 R11=0000000000010b7e R12=ffff88801830fb68 R13=0000000000000000 R14=ffff888016df3680 R15=dffffc0000000000 RIP=ffffffff813ad420 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 00007fa653c4d900 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=00007ffd644a4000 CR3=000000000e186000 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=000000000000000000ffff0000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff84531da7 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100d9e135e RSI=ffffffff84531da7 RDI=ffff88806cf09b60 RBP=ffff88806cf09b30 RSP=ffff88806cf09a90 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000fdc6 R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d751c0 R15=ffff888016ce7c60 RIP=ffffffff813ad420 RFL=00000282 [--S----] 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 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=00007fff0a577cd8 CR3=000000000e996000 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=2037313a34343a3431203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037313a34343a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000