syzkaller login: [ 39.080012] BUG: Bad rss-counter state mm:000000006246fdd4 type:MM_FILEPAGES val:33 [ 39.081071] BUG: Bad rss-counter state mm:000000006246fdd4 type:MM_ANONPAGES val:22 [ 39.244705] ================================================================== [ 39.245655] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.246631] Read of size 8 at addr ffff88800bea63f8 by task sshd/220 [ 39.247423] [ 39.247647] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.248688] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.249698] Call Trace: [ 39.250032] [ 39.250330] dump_stack_lvl+0x91/0xf0 [ 39.250832] print_report+0xcc/0x620 [ 39.251335] ? __virt_addr_valid+0x102/0x340 [ 39.251901] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.252537] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.253190] kasan_report+0xbe/0xf0 [ 39.253689] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.254331] vma_interval_tree_remove+0xc75/0xec0 [ 39.254956] vma_prepare+0xc54/0x11a0 [ 39.255447] __split_vma+0x5af/0x950 [ 39.255936] ? __pfx___split_vma+0x10/0x10 [ 39.256477] ? find_held_lock+0x2c/0x110 [ 39.257270] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.257995] ? lock_is_held_type+0x9f/0x120 [ 39.258659] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.259406] ? mtree_range_walk+0x632/0x900 [ 39.260083] ? mas_walk+0x5c7/0x7c0 [ 39.260698] do_vmi_munmap+0x1f1/0x2b0 [ 39.261303] mmap_region+0x1f9/0x2660 [ 39.261895] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.262536] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.263427] ? __pfx_lock_acquire+0x10/0x10 [ 39.264078] ? __pfx_mmap_region+0x10/0x10 [ 39.264733] ? security_mmap_addr+0x7d/0xa0 [ 39.265384] ? get_unmapped_area+0x1f5/0x3f0 [ 39.266051] do_mmap+0x854/0xf00 [ 39.266594] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.267200] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.267887] ksys_mmap_pgoff+0x3af/0x500 [ 39.268511] do_syscall_64+0x3f/0x90 [ 39.269127] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.269866] RIP: 0033:0x7f80e120fd82 [ 39.270373] 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 [ 39.272754] RSP: 002b:00007fff908f7668 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.273751] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f80e120fd82 [ 39.274679] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f80e0649000 [ 39.275616] RBP: 00007f80e0649000 R08: 0000000000000009 R09: 0000000000001000 [ 39.276543] R10: 0000000000000812 R11: 0000000000000206 R12: 00005596e4bf1d90 [ 39.277489] R13: 00007fff908f7680 R14: 00007fff908f76b0 R15: 00007fff908f7a10 [ 39.278446] [ 39.278768] [ 39.279007] Allocated by task 213: [ 39.279486] kasan_save_stack+0x22/0x50 [ 39.280039] kasan_set_track+0x25/0x30 [ 39.280603] __kasan_slab_alloc+0x59/0x70 [ 39.281186] kmem_cache_alloc+0x16b/0x370 [ 39.281755] vm_area_dup+0x20/0x160 [ 39.282258] __split_vma+0x170/0x950 [ 39.282776] split_vma+0xc6/0x110 [ 39.283267] mprotect_fixup+0x8d2/0xb30 [ 39.283830] do_mprotect_pkey+0x87e/0xd40 [ 39.284408] __x64_sys_mprotect+0x78/0xc0 [ 39.284990] do_syscall_64+0x3f/0x90 [ 39.285515] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.286229] [ 39.286466] Freed by task 213: [ 39.286899] kasan_save_stack+0x22/0x50 [ 39.287447] kasan_set_track+0x25/0x30 [ 39.288002] kasan_save_free_info+0x2b/0x50 [ 39.288601] __kasan_slab_free+0x10a/0x190 [ 39.289221] kmem_cache_free+0x10d/0x4d0 [ 39.289795] rcu_core+0x8c8/0x2860 [ 39.290288] __do_softirq+0x1b7/0x7d4 [ 39.290821] [ 39.291062] Last potentially related work creation: [ 39.291710] kasan_save_stack+0x22/0x50 [ 39.292271] __kasan_record_aux_stack+0x8e/0xa0 [ 39.292907] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.293621] remove_vma+0x139/0x170 [ 39.294118] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.294732] do_vmi_munmap+0x1f1/0x2b0 [ 39.295265] __vm_munmap+0x138/0x3a0 [ 39.295778] __x64_sys_munmap+0x59/0x80 [ 39.296322] do_syscall_64+0x3f/0x90 [ 39.296863] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.297571] [ 39.297807] The buggy address belongs to the object at ffff88800bea63a0 [ 39.297807] which belongs to the cache vm_area_struct of size 168 [ 39.299438] The buggy address is located 88 bytes inside of [ 39.299438] freed 168-byte region [ffff88800bea63a0, ffff88800bea6448) [ 39.301009] [ 39.301247] The buggy address belongs to the physical page: [ 39.301966] page:000000006f2efb08 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xbea6 [ 39.303169] memcg:ffff888016e8f401 [ 39.303642] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.304356] page_type: 0xffffffff() [ 39.304865] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 39.305898] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016e8f401 [ 39.306898] page dumped because: kasan: bad access detected [ 39.307615] [ 39.307842] Memory state around the buggy address: [ 39.308455] ffff88800bea6280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 39.309376] ffff88800bea6300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 39.310285] >ffff88800bea6380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 39.311179] ^ [ 39.312058] ffff88800bea6400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 39.312966] ffff88800bea6480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.313857] ================================================================== [ 39.314908] Disabling lock debugging due to kernel taint [ 41.922621] BUG: Bad rss-counter state mm:00000000d2a578aa type:MM_FILEPAGES val:33 [ 41.923639] BUG: Bad rss-counter state mm:00000000d2a578aa type:MM_ANONPAGES val:22 [ 42.495107] BUG: Bad rss-counter state mm:00000000d8e53fa9 type:MM_FILEPAGES val:33 [ 42.496277] BUG: Bad rss-counter state mm:00000000d8e53fa9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24456' (ECDSA) to the list of known hosts. 2023/06/20 19:15:04 fuzzer started 2023/06/20 19:15:04 dialing manager at localhost:36067 2023/06/20 19:15:04 checking machine... 2023/06/20 19:15:04 checking revisions... [ 43.162315] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:15:04 testing simple program... [ 43.198625] cgroup: Unknown subsys name 'net' [ 43.253395] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:15:04 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=00007f930f4ec5e0 CR3=0000000009b92000 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=43e208e87e039b9e9f4e024c103e0dfa XMM02=ec2efd57dc4c00df000000000011b158 XMM03=4fdfb5fe6b32e4a0000000000011b228 XMM04=992eab838b8aa9ca00000000000ae988 XMM05=3498c901ce0e82d80000000000132c38 XMM06=19e9129bd510f2350000000000131728 XMM07=fb795ef6d65770560000000000121b68 XMM08=2c67c8bc2e329bc3000000000011b1c8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000092cc0 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff81787d2a RDI=ffffffff856cd6a0 RBP=ffff888017337528 RSP=ffff8880173374c8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88800844f780 R13=0000000000000000 R14=0000000000000cc0 R15=ffffffff8184725c RIP=ffffffff812d8662 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 00007f5daf40b900 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=00007f5daf9c2618 CR3=0000000019e42000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000