Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 29.014324] BUG: Bad rss-counter state mm:0000000064536114 type:MM_FILEPAGES val:33 [ 29.015559] BUG: Bad rss-counter state mm:0000000064536114 type:MM_ANONPAGES val:22 [ 29.080030] ================================================================== [ 29.080936] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.081876] Read of size 8 at addr ffff8880139fac20 by task sshd/219 [ 29.082644] [ 29.082862] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.083953] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.084942] Call Trace: [ 29.085279] [ 29.085563] dump_stack_lvl+0x91/0xf0 [ 29.086073] print_report+0xcc/0x620 [ 29.086555] ? __virt_addr_valid+0x102/0x340 [ 29.087103] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.087718] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.088341] kasan_report+0xbe/0xf0 [ 29.088816] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.089447] vma_interval_tree_remove+0xc75/0xec0 [ 29.090047] vma_prepare+0xc54/0x11a0 [ 29.090530] __split_vma+0x5af/0x950 [ 29.091010] ? __pfx___split_vma+0x10/0x10 [ 29.091544] ? find_held_lock+0x2c/0x110 [ 29.092077] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.092642] ? lock_is_held_type+0x9f/0x120 [ 29.093201] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.093804] ? mtree_range_walk+0x632/0x900 [ 29.094357] ? mas_walk+0x5c7/0x7c0 [ 29.094832] do_vmi_munmap+0x1f1/0x2b0 [ 29.095324] mmap_region+0x1f9/0x2660 [ 29.095804] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.096315] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.097041] ? __pfx_lock_acquire+0x10/0x10 [ 29.097584] ? __pfx_mmap_region+0x10/0x10 [ 29.098114] ? security_mmap_addr+0x7d/0xa0 [ 29.098642] ? get_unmapped_area+0x1f5/0x3f0 [ 29.099193] do_mmap+0x854/0xf00 [ 29.099629] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.100131] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.100691] ksys_mmap_pgoff+0x3af/0x500 [ 29.101219] do_syscall_64+0x3f/0x90 [ 29.101695] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.102335] RIP: 0033:0x7f3fa5ab5d82 [ 29.102797] 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 [ 29.104911] RSP: 002b:00007fff85934cc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.105820] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3fa5ab5d82 [ 29.106678] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3fa4eef000 [ 29.107524] RBP: 00007f3fa4eef000 R08: 0000000000000009 R09: 0000000000001000 [ 29.108372] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559ac61f6d90 [ 29.109219] R13: 00007fff85934ce0 R14: 00007fff85934d10 R15: 00007fff85935070 [ 29.110074] [ 29.110365] [ 29.110580] Allocated by task 212: [ 29.111006] kasan_save_stack+0x22/0x50 [ 29.111511] kasan_set_track+0x25/0x30 [ 29.112003] __kasan_slab_alloc+0x59/0x70 [ 29.112537] kmem_cache_alloc+0x16b/0x370 [ 29.113049] vm_area_dup+0x20/0x160 [ 29.113515] __split_vma+0x170/0x950 [ 29.113978] split_vma+0xc6/0x110 [ 29.114423] mprotect_fixup+0x8d2/0xb30 [ 29.114925] do_mprotect_pkey+0x87e/0xd40 [ 29.115440] __x64_sys_mprotect+0x78/0xc0 [ 29.115960] do_syscall_64+0x3f/0x90 [ 29.116439] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.117081] [ 29.117302] Freed by task 19: [ 29.117687] kasan_save_stack+0x22/0x50 [ 29.118187] kasan_set_track+0x25/0x30 [ 29.118691] kasan_save_free_info+0x2b/0x50 [ 29.119222] __kasan_slab_free+0x10a/0x190 [ 29.119753] kmem_cache_free+0x10d/0x4d0 [ 29.120257] rcu_core+0x8c8/0x2860 [ 29.120701] __do_softirq+0x1b7/0x7d4 [ 29.121190] [ 29.121406] Last potentially related work creation: [ 29.121990] kasan_save_stack+0x22/0x50 [ 29.122496] __kasan_record_aux_stack+0x8e/0xa0 [ 29.123082] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.123721] remove_vma+0x139/0x170 [ 29.124174] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.124738] do_vmi_munmap+0x1f1/0x2b0 [ 29.125236] __vm_munmap+0x138/0x3a0 [ 29.125703] __x64_sys_munmap+0x59/0x80 [ 29.126207] do_syscall_64+0x3f/0x90 [ 29.126684] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.127325] [ 29.127543] Second to last potentially related work creation: [ 29.128222] kasan_save_stack+0x22/0x50 [ 29.128727] __kasan_record_aux_stack+0x8e/0xa0 [ 29.129316] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.129968] remove_vma+0x139/0x170 [ 29.130418] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.130979] do_vmi_munmap+0x1f1/0x2b0 [ 29.131470] mmap_region+0x1f9/0x2660 [ 29.131972] do_mmap+0x854/0xf00 [ 29.132419] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.132925] ksys_mmap_pgoff+0x3af/0x500 [ 29.133457] do_syscall_64+0x3f/0x90 [ 29.133952] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.134618] [ 29.134839] The buggy address belongs to the object at ffff8880139fabc8 [ 29.134839] which belongs to the cache vm_area_struct of size 168 [ 29.136386] The buggy address is located 88 bytes inside of [ 29.136386] freed 168-byte region [ffff8880139fabc8, ffff8880139fac70) [ 29.137860] [ 29.138084] The buggy address belongs to the physical page: [ 29.138780] page:00000000f67fcc67 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x139fa [ 29.139916] memcg:ffff88800f2b4901 [ 29.140358] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 29.141083] page_type: 0xffffffff() [ 29.141569] raw: 0100000000000200 ffff88800879fc80 ffffea0000377c80 dead000000000007 [ 29.142539] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f2b4901 [ 29.143492] page dumped because: kasan: bad access detected [ 29.144181] [ 29.144402] Memory state around the buggy address: [ 29.145012] ffff8880139fab00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.145913] ffff8880139fab80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 29.146813] >ffff8880139fac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 29.147711] ^ [ 29.148260] ffff8880139fac80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 29.149163] ffff8880139fad00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 29.150058] ================================================================== [ 29.151100] Disabling lock debugging due to kernel taint [ 31.175353] BUG: Bad rss-counter state mm:00000000dbafc901 type:MM_FILEPAGES val:33 [ 31.176718] BUG: Bad rss-counter state mm:00000000dbafc901 type:MM_ANONPAGES val:22 [ 31.654632] BUG: Bad rss-counter state mm:00000000dd93028f type:MM_FILEPAGES val:33 [ 31.656015] BUG: Bad rss-counter state mm:00000000dd93028f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28047' (ECDSA) to the list of known hosts. 2023/06/19 22:01:38 fuzzer started 2023/06/19 22:01:38 dialing manager at localhost:44161 2023/06/19 22:01:38 checking machine... 2023/06/19 22:01:38 checking revisions... [ 32.248865] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:01:38 testing simple program... [ 32.292817] cgroup: Unknown subsys name 'net' [ 32.359703] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:01:33 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=00007f27f112bf08 CR3=000000000e0f2000 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=2038333a31303a3232203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038333a31303a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800e097f00 RCX=ffffffff812e00e5 RDX=1ffff11001b0c454 RSI=0000000000000000 RDI=ffff88800d8622a0 RBP=ffff88800d862260 RSP=ffff88800ef97d58 R8 =0000000000000001 R9 =ffffed1001df2f99 R10=0000000000000003 R11=00000000000b6996 R12=0000000000000287 R13=ffffea00003825c0 R14=ffffffff81ef13be R15=ffff88800e3d3300 RIP=ffffffff845135a1 RFL=00000046 [---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 00007f7c702a2900 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=00007ffc0101f000 CR3=0000000019f20000 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=563412feff00545000000000000080fe 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