[ 24.768552] BUG: Bad rss-counter state mm:000000005593efc2 type:MM_FILEPAGES val:33 [ 24.769541] BUG: Bad rss-counter state mm:000000005593efc2 type:MM_ANONPAGES val:22 [ 24.809551] ================================================================== [ 24.810579] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.811732] Read of size 8 at addr ffff88800e6f1a50 by task sshd/218 [ 24.812648] [ 24.812913] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.813831] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.814892] Call Trace: [ 24.815284] [ 24.815697] dump_stack_lvl+0x91/0xf0 [ 24.816187] print_report+0xcc/0x620 [ 24.816674] ? __virt_addr_valid+0x102/0x340 [ 24.817233] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.817851] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.818466] kasan_report+0xbe/0xf0 [ 24.818951] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.819583] vma_interval_tree_remove+0xc75/0xec0 [ 24.820180] vma_prepare+0xc54/0x11a0 [ 24.820655] __split_vma+0x5af/0x950 [ 24.821134] ? __pfx___split_vma+0x10/0x10 [ 24.821663] ? find_held_lock+0x2c/0x110 [ 24.822180] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.822747] ? lock_is_held_type+0x9f/0x120 [ 24.823296] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.823899] ? mtree_range_walk+0x632/0x900 [ 24.824451] ? mas_walk+0x5c7/0x7c0 [ 24.824925] do_vmi_munmap+0x1f1/0x2b0 [ 24.825418] mmap_region+0x1f9/0x2660 [ 24.825900] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.826411] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.827119] ? __pfx_lock_acquire+0x10/0x10 [ 24.827676] ? __pfx_mmap_region+0x10/0x10 [ 24.828205] ? security_mmap_addr+0x7d/0xa0 [ 24.828734] ? get_unmapped_area+0x1f5/0x3f0 [ 24.829287] do_mmap+0x854/0xf00 [ 24.829728] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.830222] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.830785] ksys_mmap_pgoff+0x3af/0x500 [ 24.831298] do_syscall_64+0x3f/0x90 [ 24.831772] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.832421] RIP: 0033:0x7fdaf3608d82 [ 24.832875] 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 [ 24.835035] RSP: 002b:00007ffdca3e3a08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.835976] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdaf3608d82 [ 24.836845] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdaf2a42000 [ 24.837706] RBP: 00007fdaf2a42000 R08: 0000000000000009 R09: 0000000000001000 [ 24.838557] R10: 0000000000000812 R11: 0000000000000206 R12: 000056044cb4bec0 [ 24.839423] R13: 00007ffdca3e3a20 R14: 00007ffdca3e3a50 R15: 00007ffdca3e3db0 [ 24.840283] [ 24.840573] [ 24.840799] Allocated by task 211: [ 24.841237] kasan_save_stack+0x22/0x50 [ 24.841750] kasan_set_track+0x25/0x30 [ 24.842250] __kasan_slab_alloc+0x59/0x70 [ 24.842782] kmem_cache_alloc+0x16b/0x370 [ 24.843303] vm_area_dup+0x20/0x160 [ 24.843754] __split_vma+0x170/0x950 [ 24.844216] split_vma+0xc6/0x110 [ 24.844751] mprotect_fixup+0x8d2/0xb30 [ 24.845256] do_mprotect_pkey+0x87e/0xd40 [ 24.845774] __x64_sys_mprotect+0x78/0xc0 [ 24.846295] do_syscall_64+0x3f/0x90 [ 24.846765] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.847418] [ 24.847632] Freed by task 211: [ 24.848022] kasan_save_stack+0x22/0x50 [ 24.848531] kasan_set_track+0x25/0x30 [ 24.849022] kasan_save_free_info+0x2b/0x50 [ 24.849551] __kasan_slab_free+0x10a/0x190 [ 24.850084] kmem_cache_free+0x10d/0x4d0 [ 24.850589] rcu_core+0x8c8/0x2860 [ 24.851035] __do_softirq+0x1b7/0x7d4 [ 24.851532] [ 24.851750] Last potentially related work creation: [ 24.852339] kasan_save_stack+0x22/0x50 [ 24.852851] __kasan_record_aux_stack+0x8e/0xa0 [ 24.853433] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.854186] remove_vma+0x139/0x170 [ 24.854644] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.855197] do_vmi_munmap+0x1f1/0x2b0 [ 24.855687] __vm_munmap+0x138/0x3a0 [ 24.856157] __x64_sys_munmap+0x59/0x80 [ 24.856656] do_syscall_64+0x3f/0x90 [ 24.857129] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.857770] [ 24.857984] Second to last potentially related work creation: [ 24.858662] kasan_save_stack+0x22/0x50 [ 24.859164] __kasan_record_aux_stack+0x8e/0xa0 [ 24.859744] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.860384] remove_vma+0x139/0x170 [ 24.860835] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.861405] do_vmi_munmap+0x1f1/0x2b0 [ 24.861893] mmap_region+0x1f9/0x2660 [ 24.862370] do_mmap+0x854/0xf00 [ 24.862801] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.863308] ksys_mmap_pgoff+0x3af/0x500 [ 24.863816] do_syscall_64+0x3f/0x90 [ 24.864290] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.864934] [ 24.865160] The buggy address belongs to the object at ffff88800e6f19f8 [ 24.865160] which belongs to the cache vm_area_struct of size 168 [ 24.866632] The buggy address is located 88 bytes inside of [ 24.866632] freed 168-byte region [ffff88800e6f19f8, ffff88800e6f1aa0) [ 24.868053] [ 24.868269] The buggy address belongs to the physical page: [ 24.868928] page:0000000007231e6f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe6f1 [ 24.870006] memcg:ffff88800cd64d01 [ 24.870431] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.871130] page_type: 0xffffffff() [ 24.871600] raw: 0100000000000200 ffff88800879fc80 ffffea0000374000 dead000000000003 [ 24.872527] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cd64d01 [ 24.873436] page dumped because: kasan: bad access detected [ 24.874089] [ 24.874310] Memory state around the buggy address: [ 24.874890] ffff88800e6f1900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.875752] ffff88800e6f1980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 24.876614] >ffff88800e6f1a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.877477] ^ [ 24.878171] ffff88800e6f1a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 24.879027] ffff88800e6f1b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.879895] ================================================================== [ 24.881073] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.079438] BUG: Bad rss-counter state mm:00000000c4721873 type:MM_FILEPAGES val:33 [ 27.080697] BUG: Bad rss-counter state mm:00000000c4721873 type:MM_ANONPAGES val:22 [ 27.495741] BUG: Bad rss-counter state mm:00000000730758f8 type:MM_FILEPAGES val:33 [ 27.497492] BUG: Bad rss-counter state mm:00000000730758f8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59369' (ECDSA) to the list of known hosts. 2023/06/20 05:07:51 fuzzer started 2023/06/20 05:07:51 dialing manager at localhost:44161 2023/06/20 05:07:51 checking machine... 2023/06/20 05:07:51 checking revisions... [ 28.289808] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:07:51 testing simple program... [ 28.334885] cgroup: Unknown subsys name 'net' [ 28.392394] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:07:50 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff110031e1fc6 RCX=ffffffff812e0423 RDX=0000000000000000 RSI=0000000000000004 RDI=ffff88800ff49740 RBP=ffff88800986d400 RSP=ffff888018f0fe18 R8 =0000000000000000 R9 =ffffed1001fe92e8 R10=ffff88800ff49743 R11=0000000000000000 R12=0000000000000001 R13=0000000000000000 R14=0000000000000002 R15=dffffc0000000000 RIP=ffffffff814c07e4 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 00007fa35f1f0900 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=00007fa35f7a80b0 CR3=000000000cb06000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff110019d1c81 RBX=ffff88800ce8e3f8 RCX=1ffff11001a7c435 RDX=dffffc0000000000 RSI=ffffffff87b86f80 RDI=ffff88800d3e21a8 RBP=ffff88800d3e2198 RSP=ffff88800d8c78a8 R8 =0000000000000001 R9 =fffffbfff0adb044 R10=ffffffff856d8223 R11=00000000000c0000 R12=ffff88800ce8e408 R13=ffff88800cf579e8 R14=ffff88800d3e2198 R15=ffffffff87b86f80 RIP=ffffffff844cc26f 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 00007f5a7d8e2900 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=00007f5a7cd14dd0 CR3=000000000b382000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=1bfdba25a826fe7900000000000ae988 XMM05=92eb5a3909a97b350000000000135cf0 XMM06=751b9502027dc0b90000000000134ac8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000