syzkaller login: [ 31.366155] BUG: Bad rss-counter state mm:000000001bb9423d type:MM_FILEPAGES val:33 [ 31.367183] BUG: Bad rss-counter state mm:000000001bb9423d type:MM_ANONPAGES val:22 [ 31.537774] ================================================================== [ 31.538840] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.540053] Read of size 8 at addr ffff88800fdf0ed8 by task sshd/222 [ 31.540997] [ 31.541255] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.542146] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.543122] Call Trace: [ 31.543456] [ 31.543740] dump_stack_lvl+0x91/0xf0 [ 31.544226] print_report+0xcc/0x620 [ 31.544730] ? __virt_addr_valid+0x102/0x340 [ 31.545279] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.545893] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.546513] kasan_report+0xbe/0xf0 [ 31.546997] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.547613] vma_interval_tree_remove+0xc75/0xec0 [ 31.548212] vma_prepare+0xc54/0x11a0 [ 31.548700] __split_vma+0x5af/0x950 [ 31.549172] ? __pfx___split_vma+0x10/0x10 [ 31.549692] ? find_held_lock+0x2c/0x110 [ 31.550212] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.550773] ? lock_is_held_type+0x9f/0x120 [ 31.551311] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.551912] ? mtree_range_walk+0x632/0x900 [ 31.552487] ? mas_walk+0x5c7/0x7c0 [ 31.552955] do_vmi_munmap+0x1f1/0x2b0 [ 31.553443] mmap_region+0x1f9/0x2660 [ 31.553931] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.554439] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.555139] ? __pfx_lock_acquire+0x10/0x10 [ 31.555667] ? __pfx_mmap_region+0x10/0x10 [ 31.556190] ? security_mmap_addr+0x7d/0xa0 [ 31.556735] ? get_unmapped_area+0x1f5/0x3f0 [ 31.557283] do_mmap+0x854/0xf00 [ 31.557716] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.558213] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.558778] ksys_mmap_pgoff+0x3af/0x500 [ 31.559282] do_syscall_64+0x3f/0x90 [ 31.559761] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.560410] RIP: 0033:0x7f4eebf34d82 [ 31.560861] 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 [ 31.562963] RSP: 002b:00007ffccf929b28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.563862] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4eebf34d82 [ 31.564727] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4eeb36e000 [ 31.565565] RBP: 00007f4eeb36e000 R08: 0000000000000009 R09: 0000000000001000 [ 31.566405] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557805423f70 [ 31.567245] R13: 00007ffccf929b40 R14: 00007ffccf929b70 R15: 00007ffccf929ed0 [ 31.568094] [ 31.568388] [ 31.568602] Allocated by task 215: [ 31.569026] kasan_save_stack+0x22/0x50 [ 31.569525] kasan_set_track+0x25/0x30 [ 31.570009] __kasan_slab_alloc+0x59/0x70 [ 31.570526] kmem_cache_alloc+0x16b/0x370 [ 31.571034] vm_area_dup+0x20/0x160 [ 31.571484] __split_vma+0x170/0x950 [ 31.571950] split_vma+0xc6/0x110 [ 31.572391] mprotect_fixup+0x8d2/0xb30 [ 31.572888] do_mprotect_pkey+0x87e/0xd40 [ 31.573411] __x64_sys_mprotect+0x78/0xc0 [ 31.573927] do_syscall_64+0x3f/0x90 [ 31.574396] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.575033] [ 31.575250] Freed by task 215: [ 31.575644] kasan_save_stack+0x22/0x50 [ 31.576146] kasan_set_track+0x25/0x30 [ 31.576655] kasan_save_free_info+0x2b/0x50 [ 31.577178] __kasan_slab_free+0x10a/0x190 [ 31.577717] kmem_cache_free+0x10d/0x4d0 [ 31.578217] rcu_core+0x8c8/0x2860 [ 31.578668] __do_softirq+0x1b7/0x7d4 [ 31.579137] [ 31.579351] Last potentially related work creation: [ 31.579937] kasan_save_stack+0x22/0x50 [ 31.580449] __kasan_record_aux_stack+0x8e/0xa0 [ 31.581018] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.581658] remove_vma+0x139/0x170 [ 31.582112] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.582660] do_vmi_munmap+0x1f1/0x2b0 [ 31.583197] __vm_munmap+0x138/0x3a0 [ 31.583658] __x64_sys_munmap+0x59/0x80 [ 31.584148] do_syscall_64+0x3f/0x90 [ 31.584636] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.585269] [ 31.585482] Second to last potentially related work creation: [ 31.586163] kasan_save_stack+0x22/0x50 [ 31.586662] __kasan_record_aux_stack+0x8e/0xa0 [ 31.587236] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.587866] remove_vma+0x139/0x170 [ 31.588318] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.588873] do_vmi_munmap+0x1f1/0x2b0 [ 31.589356] mmap_region+0x1f9/0x2660 [ 31.589827] do_mmap+0x854/0xf00 [ 31.590255] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.590739] ksys_mmap_pgoff+0x3af/0x500 [ 31.591238] do_syscall_64+0x3f/0x90 [ 31.591707] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.592360] [ 31.592573] The buggy address belongs to the object at ffff88800fdf0e80 [ 31.592573] which belongs to the cache vm_area_struct of size 168 [ 31.594048] The buggy address is located 88 bytes inside of [ 31.594048] freed 168-byte region [ffff88800fdf0e80, ffff88800fdf0f28) [ 31.595438] [ 31.595653] The buggy address belongs to the physical page: [ 31.596329] page:00000000816100fd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfdf0 [ 31.597409] memcg:ffff88800e985701 [ 31.597835] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.598480] page_type: 0xffffffff() [ 31.598932] raw: 0100000000000200 ffff88800879fc80 ffffea0000567a00 dead000000000008 [ 31.599840] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e985701 [ 31.600756] page dumped because: kasan: bad access detected [ 31.601405] [ 31.601619] Memory state around the buggy address: [ 31.602193] ffff88800fdf0d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.603040] ffff88800fdf0e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.603886] >ffff88800fdf0e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.604732] ^ [ 31.605448] ffff88800fdf0f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.606304] ffff88800fdf0f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.607151] ================================================================== [ 31.608108] Disabling lock debugging due to kernel taint [ 33.365688] BUG: Bad rss-counter state mm:00000000dcddb87c type:MM_FILEPAGES val:33 [ 33.366666] BUG: Bad rss-counter state mm:00000000dcddb87c type:MM_ANONPAGES val:22 [ 33.899256] BUG: Bad rss-counter state mm:000000009668acdc type:MM_FILEPAGES val:33 [ 33.900237] BUG: Bad rss-counter state mm:000000009668acdc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52618' (ECDSA) to the list of known hosts. 2023/06/19 23:58:39 fuzzer started 2023/06/19 23:58:39 dialing manager at localhost:44161 2023/06/19 23:58:39 checking machine... 2023/06/19 23:58:39 checking revisions... [ 34.521668] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:58:39 testing simple program... [ 34.572755] cgroup: Unknown subsys name 'net' [ 34.636065] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:58:38 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000020003 RCX=0000000000000000 RDX=1ffffffff09a5f43 RSI=ffffffff8186d030 RDI=ffffffff84d2fa18 RBP=ffff88801778fd88 RSP=ffff88801778fd40 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000002 R11=00000000000b6996 R12=ffff88800e1d4c80 R13=ffff88801778fde0 R14=ffffffff84d2fa00 R15=0000000000000002 RIP=ffffffff814c07e0 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 00007febb8ede900 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=00007ffd0b1a0000 CR3=000000000cb80000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f910f92e110 CR3=000000000c9be000 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=e20025ec8fdbea80724326cf54b62e12 XMM02=2c67c8bc2e329bc3000000000011eca8 XMM03=fb795ef6d657705600000000001256d8 XMM04=bdbe3b04b9a75d7500000000000ae988 XMM05=59d5b690e0af863b0000000000136528 XMM06=61a7cddac1c068f10000000000135390 XMM07=e042d86d42eb936e0000000000125958 XMM08=43f782e02922bbbe000000000011ed08 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000