Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 23.904565] BUG: Bad rss-counter state mm:000000002627df62 type:MM_FILEPAGES val:33 [ 23.905605] BUG: Bad rss-counter state mm:000000002627df62 type:MM_ANONPAGES val:22 [ 24.072711] ================================================================== [ 24.073611] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.074544] Read of size 8 at addr ffff88800ba05d08 by task sshd/219 [ 24.075433] [ 24.075648] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.076527] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.077528] Call Trace: [ 24.077848] <TASK> [ 24.078133] dump_stack_lvl+0x91/0xf0 [ 24.078631] print_report+0xcc/0x620 [ 24.079113] ? __virt_addr_valid+0x102/0x340 [ 24.079670] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.080307] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.080927] kasan_report+0xbe/0xf0 [ 24.081409] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.082033] vma_interval_tree_remove+0xc75/0xec0 [ 24.082638] vma_prepare+0xc54/0x11a0 [ 24.083123] __split_vma+0x5af/0x950 [ 24.083602] ? __pfx___split_vma+0x10/0x10 [ 24.084162] ? find_held_lock+0x2c/0x110 [ 24.084689] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.085269] ? lock_is_held_type+0x9f/0x120 [ 24.085806] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.086418] ? mtree_range_walk+0x632/0x900 [ 24.086980] ? mas_walk+0x5c7/0x7c0 [ 24.087457] do_vmi_munmap+0x1f1/0x2b0 [ 24.087963] mmap_region+0x1f9/0x2660 [ 24.088471] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.089006] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.089738] ? __pfx_lock_acquire+0x10/0x10 [ 24.090271] ? __pfx_mmap_region+0x10/0x10 [ 24.090798] ? security_mmap_addr+0x7d/0xa0 [ 24.091338] ? get_unmapped_area+0x1f5/0x3f0 [ 24.091908] do_mmap+0x854/0xf00 [ 24.092352] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.092857] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.093429] ksys_mmap_pgoff+0x3af/0x500 [ 24.093938] do_syscall_64+0x3f/0x90 [ 24.094432] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.095081] RIP: 0033:0x7f1d023cfd82 [ 24.095535] 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 [ 24.097694] RSP: 002b:00007fff75cfca78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.098605] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1d023cfd82 [ 24.099455] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1d01809000 [ 24.100337] RBP: 00007f1d01809000 R08: 0000000000000009 R09: 0000000000001000 [ 24.101195] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556298c33ec0 [ 24.102043] R13: 00007fff75cfca90 R14: 00007fff75cfcac0 R15: 00007fff75cfce20 [ 24.102916] </TASK> [ 24.103213] [ 24.103427] Allocated by task 212: [ 24.103871] kasan_save_stack+0x22/0x50 [ 24.104387] kasan_set_track+0x25/0x30 [ 24.104894] __kasan_slab_alloc+0x59/0x70 [ 24.105429] kmem_cache_alloc+0x16b/0x370 [ 24.105957] vm_area_dup+0x20/0x160 [ 24.106426] __split_vma+0x170/0x950 [ 24.106895] split_vma+0xc6/0x110 [ 24.107336] mprotect_fixup+0x8d2/0xb30 [ 24.107854] do_mprotect_pkey+0x87e/0xd40 [ 24.108380] __x64_sys_mprotect+0x78/0xc0 [ 24.108911] do_syscall_64+0x3f/0x90 [ 24.109389] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.110040] [ 24.110259] Freed by task 19: [ 24.110655] kasan_save_stack+0x22/0x50 [ 24.111163] kasan_set_track+0x25/0x30 [ 24.111670] kasan_save_free_info+0x2b/0x50 [ 24.112233] __kasan_slab_free+0x10a/0x190 [ 24.112778] kmem_cache_free+0x10d/0x4d0 [ 24.113316] rcu_core+0x8c8/0x2860 [ 24.113778] __do_softirq+0x1b7/0x7d4 [ 24.114258] [ 24.114478] Last potentially related work creation: [ 24.115081] kasan_save_stack+0x22/0x50 [ 24.115593] __kasan_record_aux_stack+0x8e/0xa0 [ 24.116190] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.116849] remove_vma+0x139/0x170 [ 24.117304] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.117872] do_vmi_munmap+0x1f1/0x2b0 [ 24.118360] __vm_munmap+0x138/0x3a0 [ 24.118832] __x64_sys_munmap+0x59/0x80 [ 24.119331] do_syscall_64+0x3f/0x90 [ 24.119818] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.120473] [ 24.120694] The buggy address belongs to the object at ffff88800ba05cb0 [ 24.120694] which belongs to the cache vm_area_struct of size 168 [ 24.122211] The buggy address is located 88 bytes inside of [ 24.122211] freed 168-byte region [ffff88800ba05cb0, ffff88800ba05d58) [ 24.123636] [ 24.123869] The buggy address belongs to the physical page: [ 24.124553] page:00000000f9a31a9a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xba05 [ 24.125649] memcg:ffff88800fc60c01 [ 24.126079] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.126744] page_type: 0xffffffff() [ 24.127199] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 24.128145] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fc60c01 [ 24.129077] page dumped because: kasan: bad access detected [ 24.129755] [ 24.129976] Memory state around the buggy address: [ 24.130560] ffff88800ba05c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 24.131423] ffff88800ba05c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 24.132333] >ffff88800ba05d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 24.133197] ^ [ 24.133645] ffff88800ba05d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 24.134512] ffff88800ba05e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 24.135375] ================================================================== [ 24.136373] Disabling lock debugging due to kernel taint [ 25.970916] BUG: Bad rss-counter state mm:0000000093504ec5 type:MM_FILEPAGES val:33 [ 25.971970] BUG: Bad rss-counter state mm:0000000093504ec5 type:MM_ANONPAGES val:22 [ 26.456514] BUG: Bad rss-counter state mm:00000000d405e8e7 type:MM_FILEPAGES val:33 [ 26.457471] BUG: Bad rss-counter state mm:00000000d405e8e7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23936' (ECDSA) to the list of known hosts. 2023/06/19 15:30:33 fuzzer started 2023/06/19 15:30:33 dialing manager at localhost:44161 2023/06/19 15:30:33 checking machine... 2023/06/19 15:30:33 checking revisions... [ 27.202359] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:30:33 testing simple program... [ 27.253548] cgroup: Unknown subsys name 'net' [ 27.296049] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:30:33 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85fa39b4 RCX=ffffffff8363de42 RDX=0000000000000000 RSI=ffffffff863b1c96 RDI=ffffffff85fa39b0 RBP=ffffffff85fa39b0 RSP=ffff88801891f730 R8 =ffffffff863b1c96 R9 =ffff88801891f828 R10=0000000000038001 R11=000000000008a977 R12=ffffffff85fa39b0 R13=ffffffff85fa39b0 R14=ffffffff85fa39b0 R15=dffffc0000000000 RIP=ffffffff8112fc6e RFL=00000256 [---ZAP-] 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 00007fac1fd4a900 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=00007fac20301618 CR3=000000001bd28000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffea0000679000 RBX=ffff888019e40ca0 RCX=0000000000679000 RDX=0000000000000000 RSI=ffffffff811431c2 RDI=0000777f80000000 RBP=0000000000000000 RSP=ffff88806cf09d70 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000008 R11=0000000000000000 R12=ffff88800879f500 R13=ffff88800c688028 R14=ffff88806cf35000 R15=ffff88800c6894d8 RIP=ffffffff8180ee11 RFL=00000206 [-----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 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=00007f3b15299030 CR3=000000000e968000 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=2032333a30333a3531203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a30333a3531203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000