[ 31.208027] BUG: Bad rss-counter state mm:00000000604c3c47 type:MM_FILEPAGES val:33 [ 31.209093] BUG: Bad rss-counter state mm:00000000604c3c47 type:MM_ANONPAGES val:22 [ 31.369217] ================================================================== [ 31.370108] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.370990] Read of size 8 at addr ffff88800e95c798 by task sshd/220 [ 31.371715] [ 31.371920] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.372925] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.373838] Call Trace: [ 31.374138] [ 31.374406] dump_stack_lvl+0x91/0xf0 [ 31.375142] print_report+0xcc/0x620 [ 31.375844] ? __virt_addr_valid+0x102/0x340 [ 31.376655] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.377559] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.378455] kasan_report+0xbe/0xf0 [ 31.379148] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.379931] vma_interval_tree_remove+0xc75/0xec0 [ 31.380673] vma_prepare+0xc54/0x11a0 [ 31.381256] __split_vma+0x5af/0x950 [ 31.381830] ? __pfx___split_vma+0x10/0x10 [ 31.382479] ? find_held_lock+0x2c/0x110 [ 31.383100] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.383783] ? lock_is_held_type+0x9f/0x120 [ 31.384471] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.385209] ? mtree_range_walk+0x632/0x900 [ 31.385888] ? mas_walk+0x5c7/0x7c0 [ 31.386465] do_vmi_munmap+0x1f1/0x2b0 [ 31.387060] mmap_region+0x1f9/0x2660 [ 31.387645] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.388275] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.389167] ? __pfx_lock_acquire+0x10/0x10 [ 31.389825] ? __pfx_mmap_region+0x10/0x10 [ 31.390473] ? security_mmap_addr+0x7d/0xa0 [ 31.391113] ? get_unmapped_area+0x1f5/0x3f0 [ 31.391782] do_mmap+0x854/0xf00 [ 31.392317] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.392916] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.393604] ksys_mmap_pgoff+0x3af/0x500 [ 31.394220] do_syscall_64+0x3f/0x90 [ 31.394808] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.395591] RIP: 0033:0x7fd91c0b4d82 [ 31.396142] 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 [ 31.398785] RSP: 002b:00007ffc7c423fc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.399902] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd91c0b4d82 [ 31.400819] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd91b4ee000 [ 31.401625] RBP: 00007fd91b4ee000 R08: 0000000000000009 R09: 0000000000001000 [ 31.402418] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564b59ae6ec0 [ 31.403216] R13: 00007ffc7c423fe0 R14: 00007ffc7c424010 R15: 00007ffc7c424370 [ 31.404027] [ 31.404325] [ 31.404532] Allocated by task 213: [ 31.404943] kasan_save_stack+0x22/0x50 [ 31.405431] kasan_set_track+0x25/0x30 [ 31.405903] __kasan_slab_alloc+0x59/0x70 [ 31.406402] kmem_cache_alloc+0x16b/0x370 [ 31.406893] vm_area_dup+0x20/0x160 [ 31.407321] __split_vma+0x170/0x950 [ 31.407766] split_vma+0xc6/0x110 [ 31.408180] mprotect_fixup+0x8d2/0xb30 [ 31.408678] do_mprotect_pkey+0x87e/0xd40 [ 31.409174] __x64_sys_mprotect+0x78/0xc0 [ 31.409669] do_syscall_64+0x3f/0x90 [ 31.410118] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.410724] [ 31.410929] Freed by task 213: [ 31.411303] kasan_save_stack+0x22/0x50 [ 31.411789] kasan_set_track+0x25/0x30 [ 31.412263] kasan_save_free_info+0x2b/0x50 [ 31.412769] __kasan_slab_free+0x10a/0x190 [ 31.413275] kmem_cache_free+0x10d/0x4d0 [ 31.413758] rcu_core+0x8c8/0x2860 [ 31.414246] __do_softirq+0x1b7/0x7d4 [ 31.414709] [ 31.414914] Last potentially related work creation: [ 31.415462] kasan_save_stack+0x22/0x50 [ 31.415941] __kasan_record_aux_stack+0x8e/0xa0 [ 31.416504] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.417113] remove_vma+0x139/0x170 [ 31.417543] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.418071] do_vmi_munmap+0x1f1/0x2b0 [ 31.418530] __vm_munmap+0x138/0x3a0 [ 31.418972] __x64_sys_munmap+0x59/0x80 [ 31.419444] do_syscall_64+0x3f/0x90 [ 31.419910] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.420523] [ 31.420732] The buggy address belongs to the object at ffff88800e95c740 [ 31.420732] which belongs to the cache vm_area_struct of size 168 [ 31.422113] The buggy address is located 88 bytes inside of [ 31.422113] freed 168-byte region [ffff88800e95c740, ffff88800e95c7e8) [ 31.423425] [ 31.423643] The buggy address belongs to the physical page: [ 31.424319] page:00000000ed526114 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe95c [ 31.425408] memcg:ffff88800d4ec501 [ 31.425842] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.426555] page_type: 0xffffffff() [ 31.427009] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.427936] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d4ec501 [ 31.428859] page dumped because: kasan: bad access detected [ 31.429526] [ 31.429744] Memory state around the buggy address: [ 31.430329] ffff88800e95c680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.431192] ffff88800e95c700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.432051] >ffff88800e95c780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.432931] ^ [ 31.433428] ffff88800e95c800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.434291] ffff88800e95c880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.435147] ================================================================== [ 31.436076] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 34.170584] BUG: Bad rss-counter state mm:00000000f3059771 type:MM_FILEPAGES val:33 [ 34.171568] BUG: Bad rss-counter state mm:00000000f3059771 type:MM_ANONPAGES val:22 [ 34.742877] BUG: Bad rss-counter state mm:00000000f916bbee type:MM_FILEPAGES val:33 [ 34.744066] BUG: Bad rss-counter state mm:00000000f916bbee type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28557' (ECDSA) to the list of known hosts. 2023/06/20 20:10:26 fuzzer started 2023/06/20 20:10:27 dialing manager at localhost:36067 2023/06/20 20:10:27 checking machine... 2023/06/20 20:10:27 checking revisions... [ 35.399019] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:10:27 testing simple program... [ 35.446108] cgroup: Unknown subsys name 'net' [ 35.489257] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:10:26 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=00007ffe4b4c0aa8 CR3=0000000018c04000 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=2036323a30313a3032203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a30313a3032203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f0d98bcb000 CR3=000000000c80a000 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=a77a8562626e34a7b34013510c3304a5 XMM02=2c67c8bc2e329bc3000000000011b218 XMM03=fb795ef6d65770560000000000121bd8 XMM04=0af535311daccdd300000000000ae988 XMM05=19e9129bd510f2350000000000131778 XMM06=711c46422f8f6a2d0000000000130950 XMM07=e042d86d42eb936e0000000000121eb0 XMM08=8998f4d968ca2165000000000011b278 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000