[ 32.224040] BUG: Bad rss-counter state mm:00000000ee80c070 type:MM_FILEPAGES val:33 [ 32.225615] BUG: Bad rss-counter state mm:00000000ee80c070 type:MM_ANONPAGES val:22 [ 32.348510] ================================================================== [ 32.349243] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.349985] Read of size 8 at addr ffff88800d87f4e0 by task sshd/218 [ 32.350581] [ 32.350749] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.351514] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.352264] Call Trace: [ 32.352507] [ 32.352725] dump_stack_lvl+0x91/0xf0 [ 32.353096] print_report+0xcc/0x620 [ 32.353496] ? __virt_addr_valid+0x102/0x340 [ 32.353923] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.354397] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.354872] kasan_report+0xbe/0xf0 [ 32.355241] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.355716] vma_interval_tree_remove+0xc75/0xec0 [ 32.356179] vma_prepare+0xc54/0x11a0 [ 32.356548] __split_vma+0x5af/0x950 [ 32.356911] ? __pfx___split_vma+0x10/0x10 [ 32.357320] ? find_held_lock+0x2c/0x110 [ 32.357732] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.358161] ? lock_is_held_type+0x9f/0x120 [ 32.358574] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.359046] ? mtree_range_walk+0x632/0x900 [ 32.359469] ? mas_walk+0x5c7/0x7c0 [ 32.359831] do_vmi_munmap+0x1f1/0x2b0 [ 32.360216] mmap_region+0x1f9/0x2660 [ 32.360585] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.360981] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.361544] ? __pfx_lock_acquire+0x10/0x10 [ 32.361960] ? __pfx_mmap_region+0x10/0x10 [ 32.362375] ? security_mmap_addr+0x7d/0xa0 [ 32.362786] ? get_unmapped_area+0x1f5/0x3f0 [ 32.363218] do_mmap+0x854/0xf00 [ 32.363559] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.363943] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.364372] ksys_mmap_pgoff+0x3af/0x500 [ 32.364765] do_syscall_64+0x3f/0x90 [ 32.365137] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.365647] RIP: 0033:0x7f55b21dad82 [ 32.366003] 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 [ 32.367654] RSP: 002b:00007ffc9070f8b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.368362] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f55b21dad82 [ 32.369020] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f55b1614000 [ 32.369678] RBP: 00007f55b1614000 R08: 0000000000000009 R09: 0000000000001000 [ 32.370336] R10: 0000000000000812 R11: 0000000000000206 R12: 00005607a07cfec0 [ 32.370997] R13: 00007ffc9070f8d0 R14: 00007ffc9070f900 R15: 00007ffc9070fc60 [ 32.371655] [ 32.371881] [ 32.372050] Allocated by task 211: [ 32.372378] kasan_save_stack+0x22/0x50 [ 32.372765] kasan_set_track+0x25/0x30 [ 32.373147] __kasan_slab_alloc+0x59/0x70 [ 32.373564] kmem_cache_alloc+0x16b/0x370 [ 32.373962] vm_area_dup+0x20/0x160 [ 32.374314] __split_vma+0x170/0x950 [ 32.374673] split_vma+0xc6/0x110 [ 32.375010] mprotect_fixup+0x8d2/0xb30 [ 32.375395] do_mprotect_pkey+0x87e/0xd40 [ 32.375798] __x64_sys_mprotect+0x78/0xc0 [ 32.376199] do_syscall_64+0x3f/0x90 [ 32.376565] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.377062] [ 32.377229] Freed by task 202: [ 32.377537] kasan_save_stack+0x22/0x50 [ 32.377923] kasan_set_track+0x25/0x30 [ 32.378305] kasan_save_free_info+0x2b/0x50 [ 32.378718] __kasan_slab_free+0x10a/0x190 [ 32.379131] kmem_cache_free+0x10d/0x4d0 [ 32.379527] rcu_core+0x8c8/0x2860 [ 32.379872] __do_softirq+0x1b7/0x7d4 [ 32.380241] [ 32.380405] Last potentially related work creation: [ 32.380859] kasan_save_stack+0x22/0x50 [ 32.381253] __kasan_record_aux_stack+0x8e/0xa0 [ 32.381710] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.382209] remove_vma+0x139/0x170 [ 32.382557] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.382987] do_vmi_munmap+0x1f1/0x2b0 [ 32.383371] __vm_munmap+0x138/0x3a0 [ 32.383731] __x64_sys_munmap+0x59/0x80 [ 32.384116] do_syscall_64+0x3f/0x90 [ 32.384480] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.384978] [ 32.385151] Second to last potentially related work creation: [ 32.385684] kasan_save_stack+0x22/0x50 [ 32.386075] __kasan_record_aux_stack+0x8e/0xa0 [ 32.386515] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.387013] remove_vma+0x139/0x170 [ 32.387359] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.387791] do_vmi_munmap+0x1f1/0x2b0 [ 32.388165] mmap_region+0x1f9/0x2660 [ 32.388539] do_mmap+0x854/0xf00 [ 32.388869] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.389252] ksys_mmap_pgoff+0x3af/0x500 [ 32.389649] do_syscall_64+0x3f/0x90 [ 32.390013] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.390506] [ 32.390674] The buggy address belongs to the object at ffff88800d87f488 [ 32.390674] which belongs to the cache vm_area_struct of size 168 [ 32.391813] The buggy address is located 88 bytes inside of [ 32.391813] freed 168-byte region [ffff88800d87f488, ffff88800d87f530) [ 32.392901] [ 32.393069] The buggy address belongs to the physical page: [ 32.393595] page:0000000065dc1455 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd87f [ 32.394438] memcg:ffff88800d796101 [ 32.394769] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.395274] page_type: 0xffffffff() [ 32.395618] raw: 0100000000000200 ffff88800879fc80 ffffea00003bf900 dead00000000000c [ 32.396329] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d796101 [ 32.397028] page dumped because: kasan: bad access detected [ 32.397542] [ 32.397709] Memory state around the buggy address: [ 32.398155] ffff88800d87f380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.398818] ffff88800d87f400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 32.399489] >ffff88800d87f480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.400148] ^ [ 32.400727] ffff88800d87f500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 32.401391] ffff88800d87f580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.402063] ================================================================== [ 32.402846] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 34.036291] BUG: Bad rss-counter state mm:0000000087f8362e type:MM_FILEPAGES val:33 [ 34.037379] BUG: Bad rss-counter state mm:0000000087f8362e type:MM_ANONPAGES val:22 [ 34.422580] BUG: Bad rss-counter state mm:00000000362448bb type:MM_FILEPAGES val:33 [ 34.423622] BUG: Bad rss-counter state mm:00000000362448bb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65492' (ECDSA) to the list of known hosts. 2023/06/20 03:05:01 fuzzer started 2023/06/20 03:05:01 dialing manager at localhost:44161 2023/06/20 03:05:01 checking machine... 2023/06/20 03:05:01 checking revisions... [ 35.159211] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:05:02 testing simple program... [ 35.210073] cgroup: Unknown subsys name 'net' [ 35.262550] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:05:00 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fff8ea415d8 CR3=000000000e54e000 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=2031303a35303a3330203032206e754a XMM01=657463656e6e6f63736944203a5d3732 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3732325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a35303a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800cb3cc00 RCX=0000000000000000 RDX=1ffff110017d0ab6 RSI=000000000000024b RDI=ffff88800be855b0 RBP=0000000000000100 RSP=ffff888014727de0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=000000007fff0000 R13=dffffc0000000000 R14=ffff888014727e30 R15=ffffc9000068d000 RIP=ffffffff814c07e4 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 00007f3ad33bb900 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=00007f0efb618650 CR3=000000000d9ce000 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=1118a120bd9cf87800000000000ae988 XMM05=eb5d42e48f403a5a0000000000135e68 XMM06=ba8bc11de6a33d190000000000134898 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000