[ 24.312802] BUG: Bad rss-counter state mm:00000000b3c053b6 type:MM_FILEPAGES val:33 [ 24.314438] BUG: Bad rss-counter state mm:00000000b3c053b6 type:MM_ANONPAGES val:22 [ 24.469257] ================================================================== [ 24.470129] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.471041] Read of size 8 at addr ffff88800e2d84e0 by task sshd/220 [ 24.471781] [ 24.471996] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.472975] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.473917] Call Trace: [ 24.474228] [ 24.474503] dump_stack_lvl+0x91/0xf0 [ 24.474994] print_report+0xcc/0x620 [ 24.475471] ? __virt_addr_valid+0x102/0x340 [ 24.476004] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.476601] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.477214] kasan_report+0xbe/0xf0 [ 24.477669] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.478273] vma_interval_tree_remove+0xc75/0xec0 [ 24.478856] vma_prepare+0xc54/0x11a0 [ 24.479324] __split_vma+0x5af/0x950 [ 24.479782] ? __pfx___split_vma+0x10/0x10 [ 24.480297] ? find_held_lock+0x2c/0x110 [ 24.480808] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.481367] ? lock_is_held_type+0x9f/0x120 [ 24.481887] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.482486] ? mtree_range_walk+0x632/0x900 [ 24.483037] ? mas_walk+0x5c7/0x7c0 [ 24.483509] do_vmi_munmap+0x1f1/0x2b0 [ 24.483997] mmap_region+0x1f9/0x2660 [ 24.484469] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.484994] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.485692] ? __pfx_lock_acquire+0x10/0x10 [ 24.486215] ? __pfx_mmap_region+0x10/0x10 [ 24.486730] ? security_mmap_addr+0x7d/0xa0 [ 24.487245] ? get_unmapped_area+0x1f5/0x3f0 [ 24.487779] do_mmap+0x854/0xf00 [ 24.488205] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.488679] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.489234] ksys_mmap_pgoff+0x3af/0x500 [ 24.489714] do_syscall_64+0x3f/0x90 [ 24.490185] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.490806] RIP: 0033:0x7fdef180ad82 [ 24.491231] 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 [ 24.493298] RSP: 002b:00007fff1197aef8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.494170] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdef180ad82 [ 24.494997] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdef0c44000 [ 24.495816] RBP: 00007fdef0c44000 R08: 0000000000000009 R09: 0000000000001000 [ 24.496638] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f90a453ec0 [ 24.497483] R13: 00007fff1197af10 R14: 00007fff1197af40 R15: 00007fff1197b2a0 [ 24.498322] [ 24.498598] [ 24.498811] Allocated by task 213: [ 24.499228] kasan_save_stack+0x22/0x50 [ 24.499715] kasan_set_track+0x25/0x30 [ 24.500192] __kasan_slab_alloc+0x59/0x70 [ 24.500708] kmem_cache_alloc+0x16b/0x370 [ 24.501230] vm_area_dup+0x20/0x160 [ 24.501673] __split_vma+0x170/0x950 [ 24.502125] split_vma+0xc6/0x110 [ 24.502547] mprotect_fixup+0x8d2/0xb30 [ 24.503037] do_mprotect_pkey+0x87e/0xd40 [ 24.503539] __x64_sys_mprotect+0x78/0xc0 [ 24.504049] do_syscall_64+0x3f/0x90 [ 24.504513] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.505169] [ 24.505377] Freed by task 213: [ 24.505756] kasan_save_stack+0x22/0x50 [ 24.506242] kasan_set_track+0x25/0x30 [ 24.506723] kasan_save_free_info+0x2b/0x50 [ 24.507243] __kasan_slab_free+0x10a/0x190 [ 24.507763] kmem_cache_free+0x10d/0x4d0 [ 24.508261] rcu_core+0x8c8/0x2860 [ 24.508692] __do_softirq+0x1b7/0x7d4 [ 24.509175] [ 24.509390] Last potentially related work creation: [ 24.509949] kasan_save_stack+0x22/0x50 [ 24.510442] __kasan_record_aux_stack+0x8e/0xa0 [ 24.510994] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.511620] remove_vma+0x139/0x170 [ 24.512061] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.512611] do_vmi_munmap+0x1f1/0x2b0 [ 24.513101] __vm_munmap+0x138/0x3a0 [ 24.513540] __x64_sys_munmap+0x59/0x80 [ 24.514010] do_syscall_64+0x3f/0x90 [ 24.514457] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.515061] [ 24.515265] Second to last potentially related work creation: [ 24.515899] kasan_save_stack+0x22/0x50 [ 24.516368] __kasan_record_aux_stack+0x8e/0xa0 [ 24.516916] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.517525] remove_vma+0x139/0x170 [ 24.517951] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.518477] do_vmi_munmap+0x1f1/0x2b0 [ 24.518931] mmap_region+0x1f9/0x2660 [ 24.519378] do_mmap+0x854/0xf00 [ 24.519793] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.520273] ksys_mmap_pgoff+0x3af/0x500 [ 24.520769] do_syscall_64+0x3f/0x90 [ 24.521259] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.521891] [ 24.522097] The buggy address belongs to the object at ffff88800e2d8488 [ 24.522097] which belongs to the cache vm_area_struct of size 168 [ 24.523550] The buggy address is located 88 bytes inside of [ 24.523550] freed 168-byte region [ffff88800e2d8488, ffff88800e2d8530) [ 24.524949] [ 24.525164] The buggy address belongs to the physical page: [ 24.525808] page:00000000ff79126a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe2d8 [ 24.526833] memcg:ffff88800e06c601 [ 24.527231] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.527830] page_type: 0xffffffff() [ 24.528248] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 24.529106] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e06c601 [ 24.529941] page dumped because: kasan: bad access detected [ 24.530550] [ 24.530752] Memory state around the buggy address: [ 24.531289] ffff88800e2d8380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 24.532079] ffff88800e2d8400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 24.532872] >ffff88800e2d8480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.533669] ^ [ 24.534365] ffff88800e2d8500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 24.535156] ffff88800e2d8580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.535941] ================================================================== [ 24.536871] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.464409] BUG: Bad rss-counter state mm:000000008b8838f0 type:MM_FILEPAGES val:33 [ 26.465441] BUG: Bad rss-counter state mm:000000008b8838f0 type:MM_ANONPAGES val:22 [ 26.875929] BUG: Bad rss-counter state mm:00000000b2b4f975 type:MM_FILEPAGES val:33 [ 26.876702] BUG: Bad rss-counter state mm:00000000b2b4f975 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24070' (ECDSA) to the list of known hosts. 2023/06/21 10:41:38 fuzzer started 2023/06/21 10:41:38 dialing manager at localhost:36067 2023/06/21 10:41:38 checking machine... 2023/06/21 10:41:38 checking revisions... [ 27.524712] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:41:38 testing simple program... [ 27.575389] cgroup: Unknown subsys name 'net' [ 27.622478] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:41:38 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=00007f8130bb6440 CR3=000000000d7d0000 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=bf392e9e70aec5afff4dc4df146d23d1 XMM02=000000000011a5d8ec2efd57dc4c00df XMM03=0000000000121460140059b19ce5aa72 XMM04=4d879676cb693f2600000000000ae988 XMM05=4947f435a3d891510000000000133480 XMM06=4fda316b135da52b00000000001321b0 XMM07=e042d86d42eb936e0000000000121738 XMM08=140059b19ce5aa72000000000011a638 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff86138eb0 RDX=1ffff110032d0dec RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888019686f70 RSP=ffff888019686ea8 R8 =ffffffff86138eb4 R9 =ffff888019686f58 R10=0000000000038001 R11=0000000000020d9c R12=ffff888019686f78 R13=ffff888019686f60 R14=ffff888019687278 R15=ffff888019686f18 RIP=ffffffff81131c60 RFL=00000246 [---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 00007f8a8d618900 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=00007f8a8d5b5008 CR3=000000000ef64000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000