[ 23.953816] BUG: Bad rss-counter state mm:0000000061e084e8 type:MM_FILEPAGES val:33 [ 23.954964] BUG: Bad rss-counter state mm:0000000061e084e8 type:MM_ANONPAGES val:22 [ 24.095568] ================================================================== [ 24.096316] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.097121] Read of size 8 at addr ffff888016a15d08 by task sshd/220 [ 24.097766] [ 24.097948] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.098669] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.099584] Call Trace: [ 24.099856] <TASK> [ 24.100091] dump_stack_lvl+0x91/0xf0 [ 24.100502] print_report+0xcc/0x620 [ 24.100931] ? __virt_addr_valid+0x102/0x340 [ 24.101413] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.101932] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.102444] kasan_report+0xbe/0xf0 [ 24.102842] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.103362] vma_interval_tree_remove+0xc75/0xec0 [ 24.103864] vma_prepare+0xc54/0x11a0 [ 24.104267] __split_vma+0x5af/0x950 [ 24.104663] ? __pfx___split_vma+0x10/0x10 [ 24.105118] ? find_held_lock+0x2c/0x110 [ 24.105553] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.106019] ? lock_is_held_type+0x9f/0x120 [ 24.106469] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.106974] ? mtree_range_walk+0x632/0x900 [ 24.107440] ? mas_walk+0x5c7/0x7c0 [ 24.107843] do_vmi_munmap+0x1f1/0x2b0 [ 24.108251] mmap_region+0x1f9/0x2660 [ 24.108650] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.109140] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.109752] ? __pfx_lock_acquire+0x10/0x10 [ 24.110329] ? __pfx_mmap_region+0x10/0x10 [ 24.110782] ? security_mmap_addr+0x7d/0xa0 [ 24.111234] ? get_unmapped_area+0x1f5/0x3f0 [ 24.111698] do_mmap+0x854/0xf00 [ 24.112063] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.112476] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.112968] ksys_mmap_pgoff+0x3af/0x500 [ 24.113387] do_syscall_64+0x3f/0x90 [ 24.113791] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.114343] RIP: 0033:0x7fe0adb54d82 [ 24.114730] 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 [ 24.116511] RSP: 002b:00007ffc23578348 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.117277] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe0adb54d82 [ 24.117989] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe0acf8e000 [ 24.118702] RBP: 00007fe0acf8e000 R08: 0000000000000009 R09: 0000000000001000 [ 24.119410] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c3715faec0 [ 24.120112] R13: 00007ffc23578360 R14: 00007ffc23578390 R15: 00007ffc235786f0 [ 24.120833] </TASK> [ 24.121077] [ 24.121255] Allocated by task 213: [ 24.121619] kasan_save_stack+0x22/0x50 [ 24.122046] kasan_set_track+0x25/0x30 [ 24.122462] __kasan_slab_alloc+0x59/0x70 [ 24.122897] kmem_cache_alloc+0x16b/0x370 [ 24.123326] vm_area_dup+0x20/0x160 [ 24.123703] __split_vma+0x170/0x950 [ 24.124091] split_vma+0xc6/0x110 [ 24.124459] mprotect_fixup+0x8d2/0xb30 [ 24.124921] do_mprotect_pkey+0x87e/0xd40 [ 24.125355] __x64_sys_mprotect+0x78/0xc0 [ 24.125803] do_syscall_64+0x3f/0x90 [ 24.126205] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.126751] [ 24.126930] Freed by task 213: [ 24.127258] kasan_save_stack+0x22/0x50 [ 24.127679] kasan_set_track+0x25/0x30 [ 24.128096] kasan_save_free_info+0x2b/0x50 [ 24.128543] __kasan_slab_free+0x10a/0x190 [ 24.128992] kmem_cache_free+0x10d/0x4d0 [ 24.129417] rcu_core+0x8c8/0x2860 [ 24.129794] __do_softirq+0x1b7/0x7d4 [ 24.130193] [ 24.130373] Last potentially related work creation: [ 24.130860] kasan_save_stack+0x22/0x50 [ 24.131286] __kasan_record_aux_stack+0x8e/0xa0 [ 24.131774] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.132312] remove_vma+0x139/0x170 [ 24.132694] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.133174] do_vmi_munmap+0x1f1/0x2b0 [ 24.133585] __vm_munmap+0x138/0x3a0 [ 24.133978] __x64_sys_munmap+0x59/0x80 [ 24.134393] do_syscall_64+0x3f/0x90 [ 24.134789] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.135326] [ 24.135508] The buggy address belongs to the object at ffff888016a15cb0 [ 24.135508] which belongs to the cache vm_area_struct of size 168 [ 24.136753] The buggy address is located 88 bytes inside of [ 24.136753] freed 168-byte region [ffff888016a15cb0, ffff888016a15d58) [ 24.137957] [ 24.138147] The buggy address belongs to the physical page: [ 24.138699] page:0000000005c1199c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16a15 [ 24.139620] memcg:ffff88800ca06c01 [ 24.139980] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.140524] page_type: 0xffffffff() [ 24.140922] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 24.141696] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ca06c01 [ 24.142450] page dumped because: kasan: bad access detected [ 24.142999] [ 24.143180] Memory state around the buggy address: [ 24.143656] ffff888016a15c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 24.144366] ffff888016a15c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 24.145078] >ffff888016a15d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 24.145784] ^ [ 24.146149] ffff888016a15d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 24.146860] ffff888016a15e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 24.147570] ================================================================== [ 24.148487] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.682572] BUG: Bad rss-counter state mm:000000007aa5414e type:MM_FILEPAGES val:33 [ 25.683321] BUG: Bad rss-counter state mm:000000007aa5414e type:MM_ANONPAGES val:22 [ 26.134474] BUG: Bad rss-counter state mm:00000000396dd309 type:MM_FILEPAGES val:33 [ 26.135442] BUG: Bad rss-counter state mm:00000000396dd309 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32987' (ECDSA) to the list of known hosts. 2023/06/21 05:20:49 fuzzer started 2023/06/21 05:20:49 dialing manager at localhost:36067 2023/06/21 05:20:49 checking machine... 2023/06/21 05:20:49 checking revisions... [ 26.882455] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:20:49 testing simple program... [ 26.933592] cgroup: Unknown subsys name 'net' [ 26.989055] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:20:48 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=00007ffdfb3acbb8 CR3=000000000da2e000 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=2038343a30323a3530203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038343a30323a3530203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8180803a RDX=0000000000008080 RSI=0000000000008080 RDI=ffffffff86509bf0 RBP=ffff8880167cf8d0 RSP=ffff8880167cf808 R8 =0000000000000000 R9 =ffff8880167cf8b8 R10=0000000000038001 R11=0000000000020de5 R12=ffff8880167cf8d8 R13=ffff8880167cf8c0 R14=ffff8880167cf8b9 R15=ffff8880167cf878 RIP=ffffffff8113077a RFL=00000216 [----AP-] 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 00007fac6809b900 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=00007ffeb316c000 CR3=000000000f1a6000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000