[ 23.846316] BUG: Bad rss-counter state mm:00000000d4cbec30 type:MM_FILEPAGES val:33 [ 23.848339] BUG: Bad rss-counter state mm:00000000d4cbec30 type:MM_ANONPAGES val:22 [ 24.007308] ================================================================== [ 24.008266] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.009234] Read of size 8 at addr ffff888015b143f8 by task sshd/219 [ 24.010024] [ 24.010253] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.011237] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.012273] Call Trace: [ 24.012609] [ 24.012905] dump_stack_lvl+0x91/0xf0 [ 24.013433] print_report+0xcc/0x620 [ 24.013930] ? __virt_addr_valid+0x102/0x340 [ 24.014510] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.015150] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.015784] kasan_report+0xbe/0xf0 [ 24.016297] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.016940] vma_interval_tree_remove+0xc75/0xec0 [ 24.017563] vma_prepare+0xc54/0x11a0 [ 24.018061] __split_vma+0x5af/0x950 [ 24.018550] ? __pfx___split_vma+0x10/0x10 [ 24.019100] ? find_held_lock+0x2c/0x110 [ 24.019636] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.020250] ? lock_is_held_type+0x9f/0x120 [ 24.020817] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.021452] ? mtree_range_walk+0x632/0x900 [ 24.022025] ? mas_walk+0x5c7/0x7c0 [ 24.022518] do_vmi_munmap+0x1f1/0x2b0 [ 24.023040] mmap_region+0x1f9/0x2660 [ 24.023546] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.024082] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.024834] ? __pfx_lock_acquire+0x10/0x10 [ 24.025393] ? __pfx_mmap_region+0x10/0x10 [ 24.025955] ? security_mmap_addr+0x7d/0xa0 [ 24.026518] ? get_unmapped_area+0x1f5/0x3f0 [ 24.027095] do_mmap+0x854/0xf00 [ 24.027555] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.028076] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.028681] ksys_mmap_pgoff+0x3af/0x500 [ 24.029214] do_syscall_64+0x3f/0x90 [ 24.029718] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.030396] RIP: 0033:0x7f2fa090dd82 [ 24.030876] 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 [ 24.033120] RSP: 002b:00007fff16b83508 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.034064] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2fa090dd82 [ 24.034947] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2f9fd47000 [ 24.035829] RBP: 00007f2f9fd47000 R08: 0000000000000009 R09: 0000000000001000 [ 24.036727] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ec5a5ebd90 [ 24.037612] R13: 00007fff16b83520 R14: 00007fff16b83550 R15: 00007fff16b838b0 [ 24.038507] [ 24.038811] [ 24.039037] Allocated by task 212: [ 24.039486] kasan_save_stack+0x22/0x50 [ 24.040012] kasan_set_track+0x25/0x30 [ 24.040537] __kasan_slab_alloc+0x59/0x70 [ 24.041095] kmem_cache_alloc+0x16b/0x370 [ 24.041665] vm_area_dup+0x20/0x160 [ 24.042172] __split_vma+0x170/0x950 [ 24.042695] split_vma+0xc6/0x110 [ 24.043192] mprotect_fixup+0x8d2/0xb30 [ 24.043764] do_mprotect_pkey+0x87e/0xd40 [ 24.044355] __x64_sys_mprotect+0x78/0xc0 [ 24.044921] do_syscall_64+0x3f/0x90 [ 24.045433] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.046133] [ 24.046373] Freed by task 212: [ 24.046804] kasan_save_stack+0x22/0x50 [ 24.047371] kasan_set_track+0x25/0x30 [ 24.047929] kasan_save_free_info+0x2b/0x50 [ 24.048548] __kasan_slab_free+0x10a/0x190 [ 24.049154] kmem_cache_free+0x10d/0x4d0 [ 24.049728] rcu_core+0x8c8/0x2860 [ 24.050230] __do_softirq+0x1b7/0x7d4 [ 24.050764] [ 24.051009] Last potentially related work creation: [ 24.051676] kasan_save_stack+0x22/0x50 [ 24.052251] __kasan_record_aux_stack+0x8e/0xa0 [ 24.052963] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.053685] remove_vma+0x139/0x170 [ 24.054191] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.054801] do_vmi_munmap+0x1f1/0x2b0 [ 24.055333] __vm_munmap+0x138/0x3a0 [ 24.055850] __x64_sys_munmap+0x59/0x80 [ 24.056386] do_syscall_64+0x3f/0x90 [ 24.056894] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.057594] [ 24.057824] The buggy address belongs to the object at ffff888015b143a0 [ 24.057824] which belongs to the cache vm_area_struct of size 168 [ 24.059390] The buggy address is located 88 bytes inside of [ 24.059390] freed 168-byte region [ffff888015b143a0, ffff888015b14448) [ 24.060901] [ 24.061136] The buggy address belongs to the physical page: [ 24.061842] page:000000004fec1354 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15b14 [ 24.063006] memcg:ffff88801669bd01 [ 24.063479] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.064224] page_type: 0xffffffff() [ 24.064779] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.065755] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801669bd01 [ 24.066716] page dumped because: kasan: bad access detected [ 24.067433] [ 24.067660] Memory state around the buggy address: [ 24.068290] ffff888015b14280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 24.069200] ffff888015b14300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 24.070099] >ffff888015b14380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 24.070993] ^ [ 24.071890] ffff888015b14400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 24.072808] ffff888015b14480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.073726] ================================================================== [ 24.074851] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.599788] BUG: Bad rss-counter state mm:00000000f815ec75 type:MM_FILEPAGES val:33 [ 25.600565] BUG: Bad rss-counter state mm:00000000f815ec75 type:MM_ANONPAGES val:22 [ 26.004641] BUG: Bad rss-counter state mm:00000000dd7c3170 type:MM_FILEPAGES val:33 [ 26.005628] BUG: Bad rss-counter state mm:00000000dd7c3170 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25526' (ECDSA) to the list of known hosts. 2023/06/20 20:42:34 fuzzer started 2023/06/20 20:42:34 dialing manager at localhost:36067 2023/06/20 20:42:34 checking machine... 2023/06/20 20:42:34 checking revisions... [ 26.758509] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:42:34 testing simple program... [ 26.812366] cgroup: Unknown subsys name 'net' [ 26.849965] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:42:33 Registers: info registers vcpu 0 RAX=0000000000000200 RBX=ffff88801904f580 RCX=ffff88806c761498 RDX=0000000000000000 RSI=ffff88801904f580 RDI=ffffffff81810727 RBP=ffff88800c3aa640 RSP=ffff888016f57910 R8 =0000000000c59eb5 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000200 R13=ffffea00006413c0 R14=ffffffff81c63c8c R15=0000000000000000 RIP=ffffffff845119a4 RFL=00000006 [-----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 00007fbfa1851700 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=00007fd639698650 CR3=000000001022c000 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=2033333a32343a3032203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033333a32343a3032203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000050 RBX=ffff888009090000 RCX=0000000000000000 RDX=00000000000101f7 RSI=ffffffff8219168b RDI=0000000000000007 RBP=00000000000003e7 RSP=ffff888008d7f318 R8 =0000000000000007 R9 =0000000000010000 R10=00000000000101f7 R11=0000000000000000 R12=00000000000101f7 R13=ffffed1001212001 R14=ffffffff85a23960 R15=dffffc0000000000 RIP=ffffffff8219168f RFL=00000093 [--S-A-C] 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 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=00007f591be14af0 CR3=000000000c5c0000 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=bac2843f1b61cacc00000000000ae988 XMM05=4a07f7536ebb4c410000000000132648 XMM06=c291bd5c70af25b90000000000131378 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000