syzkaller login: [ 31.774053] BUG: Bad rss-counter state mm:00000000b243c5cb type:MM_FILEPAGES val:33 [ 31.775378] BUG: Bad rss-counter state mm:00000000b243c5cb type:MM_ANONPAGES val:22 [ 31.928526] ================================================================== [ 31.929560] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.930554] Read of size 8 at addr ffff88800d5c5798 by task sshd/219 [ 31.931515] [ 31.931748] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.932659] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.933708] Call Trace: [ 31.934026] [ 31.934335] dump_stack_lvl+0x91/0xf0 [ 31.934854] print_report+0xcc/0x620 [ 31.935370] ? __virt_addr_valid+0x102/0x340 [ 31.935955] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.936610] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.937285] kasan_report+0xbe/0xf0 [ 31.937778] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.938451] vma_interval_tree_remove+0xc75/0xec0 [ 31.939116] vma_prepare+0xc54/0x11a0 [ 31.939645] __split_vma+0x5af/0x950 [ 31.940166] ? __pfx___split_vma+0x10/0x10 [ 31.940720] ? find_held_lock+0x2c/0x110 [ 31.941289] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.941908] ? lock_is_held_type+0x9f/0x120 [ 31.942505] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.943176] ? mtree_range_walk+0x632/0x900 [ 31.943781] ? mas_walk+0x5c7/0x7c0 [ 31.944289] do_vmi_munmap+0x1f1/0x2b0 [ 31.944815] mmap_region+0x1f9/0x2660 [ 31.945347] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.945911] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.946703] ? __pfx_lock_acquire+0x10/0x10 [ 31.947285] ? __pfx_mmap_region+0x10/0x10 [ 31.947832] ? security_mmap_addr+0x7d/0xa0 [ 31.948409] ? get_unmapped_area+0x1f5/0x3f0 [ 31.949026] do_mmap+0x854/0xf00 [ 31.949508] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.950054] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.950681] ksys_mmap_pgoff+0x3af/0x500 [ 31.951236] do_syscall_64+0x3f/0x90 [ 31.951732] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.952432] RIP: 0033:0x7fb028188d82 [ 31.952940] 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 [ 31.955289] RSP: 002b:00007ffe62fa3a18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.956258] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb028188d82 [ 31.957212] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb0275c2000 [ 31.958161] RBP: 00007fb0275c2000 R08: 0000000000000009 R09: 0000000000001000 [ 31.959105] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c784326b20 [ 31.959985] R13: 00007ffe62fa3a30 R14: 00007ffe62fa3a60 R15: 00007ffe62fa3dc0 [ 31.960940] [ 31.961259] [ 31.961494] Allocated by task 212: [ 31.961969] kasan_save_stack+0x22/0x50 [ 31.962544] kasan_set_track+0x25/0x30 [ 31.963092] __kasan_slab_alloc+0x59/0x70 [ 31.963669] kmem_cache_alloc+0x16b/0x370 [ 31.964238] vm_area_dup+0x20/0x160 [ 31.964760] __split_vma+0x170/0x950 [ 31.965284] split_vma+0xc6/0x110 [ 31.965769] mprotect_fixup+0x8d2/0xb30 [ 31.966337] do_mprotect_pkey+0x87e/0xd40 [ 31.966916] __x64_sys_mprotect+0x78/0xc0 [ 31.967496] do_syscall_64+0x3f/0x90 [ 31.968024] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.968696] [ 31.968930] Freed by task 212: [ 31.969364] kasan_save_stack+0x22/0x50 [ 31.969930] kasan_set_track+0x25/0x30 [ 31.970475] kasan_save_free_info+0x2b/0x50 [ 31.971083] __kasan_slab_free+0x10a/0x190 [ 31.971639] kmem_cache_free+0x10d/0x4d0 [ 31.972236] rcu_core+0x8c8/0x2860 [ 31.972760] __do_softirq+0x1b7/0x7d4 [ 31.973295] [ 31.973534] Last potentially related work creation: [ 31.974193] kasan_save_stack+0x22/0x50 [ 31.974748] __kasan_record_aux_stack+0x8e/0xa0 [ 31.975375] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.976043] remove_vma+0x139/0x170 [ 31.976558] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.977198] do_vmi_munmap+0x1f1/0x2b0 [ 31.977739] __vm_munmap+0x138/0x3a0 [ 31.978259] __x64_sys_munmap+0x59/0x80 [ 31.978823] do_syscall_64+0x3f/0x90 [ 31.979342] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.980009] [ 31.980257] The buggy address belongs to the object at ffff88800d5c5740 [ 31.980257] which belongs to the cache vm_area_struct of size 168 [ 31.981927] The buggy address is located 88 bytes inside of [ 31.981927] freed 168-byte region [ffff88800d5c5740, ffff88800d5c57e8) [ 31.983484] [ 31.983705] The buggy address belongs to the physical page: [ 31.984418] page:000000002b235360 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd5c5 [ 31.985658] memcg:ffff88801824c701 [ 31.986135] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.986827] page_type: 0xffffffff() [ 31.987308] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.988287] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801824c701 [ 31.989216] page dumped because: kasan: bad access detected [ 31.989922] [ 31.990155] Memory state around the buggy address: [ 31.990780] ffff88800d5c5680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.991702] ffff88800d5c5700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.992586] >ffff88800d5c5780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.993465] ^ [ 31.993997] ffff88800d5c5800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.994919] ffff88800d5c5880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.995773] ================================================================== [ 31.996821] Disabling lock debugging due to kernel taint [ 34.252751] BUG: Bad rss-counter state mm:0000000099285fa6 type:MM_FILEPAGES val:33 [ 34.254177] BUG: Bad rss-counter state mm:0000000099285fa6 type:MM_ANONPAGES val:22 [ 34.734724] BUG: Bad rss-counter state mm:00000000d731c524 type:MM_FILEPAGES val:33 [ 34.735805] BUG: Bad rss-counter state mm:00000000d731c524 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14905' (ECDSA) to the list of known hosts. 2023/06/19 20:21:27 fuzzer started 2023/06/19 20:21:27 dialing manager at localhost:44161 2023/06/19 20:21:27 checking machine... 2023/06/19 20:21:27 checking revisions... [ 35.494559] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:21:28 testing simple program... [ 35.545347] cgroup: Unknown subsys name 'net' [ 35.603773] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:21:26 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800ed07e00 RCX=0000000000000000 RDX=1ffff11001cefb58 RSI=ffffffff818695ff RDI=ffff88800e77dac0 RBP=ffff88800ed07db0 RSP=ffff88800ed07b10 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=000000000000011a R13=000000000000011a R14=ffff88800e77d900 R15=ffff88801ac184d8 RIP=ffffffff8186966a RFL=00000246 [---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 00007fd875231700 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=00007f2c9dd20aa0 CR3=00000000164b2000 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=2037323a31323a3032203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a31323a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff83c632d1 RDX=ffff888010088000 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff8880164df6a0 R8 =0000000000000005 R9 =00000000000000ff R10=00000000000000f6 R11=00000a3b00000a3b R12=0000000000000000 R13=00000000000000f6 R14=dffffc0000000000 R15=0000000000000001 RIP=ffffffff814c07e0 RFL=00000287 [--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 00007f13a8d25900 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=00007fff62d59000 CR3=0000000016638000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000