syzkaller login: [ 61.033765] BUG: Bad rss-counter state mm:00000000268bfb34 type:MM_FILEPAGES val:33 [ 61.034971] BUG: Bad rss-counter state mm:00000000268bfb34 type:MM_ANONPAGES val:22 [ 61.071892] ================================================================== [ 61.072832] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.073795] Read of size 8 at addr ffff88800eb60df0 by task sshd/220 [ 61.074565] [ 61.074789] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.075658] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.076655] Call Trace: [ 61.076978] [ 61.077266] dump_stack_lvl+0x91/0xf0 [ 61.077783] print_report+0xcc/0x620 [ 61.078275] ? __virt_addr_valid+0x102/0x340 [ 61.078834] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.079454] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.080078] kasan_report+0xbe/0xf0 [ 61.080559] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.081186] vma_interval_tree_remove+0xc75/0xec0 [ 61.081835] vma_prepare+0xc54/0x11a0 [ 61.082322] __split_vma+0x5af/0x950 [ 61.082798] ? __pfx___split_vma+0x10/0x10 [ 61.083330] ? find_held_lock+0x2c/0x110 [ 61.083853] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.084427] ? lock_is_held_type+0x9f/0x120 [ 61.084978] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.085610] ? mtree_range_walk+0x632/0x900 [ 61.086173] ? mas_walk+0x5c7/0x7c0 [ 61.086661] do_vmi_munmap+0x1f1/0x2b0 [ 61.087159] mmap_region+0x1f9/0x2660 [ 61.087645] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.088157] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.088884] ? __pfx_lock_acquire+0x10/0x10 [ 61.089426] ? __pfx_mmap_region+0x10/0x10 [ 61.089961] ? security_mmap_addr+0x7d/0xa0 [ 61.090507] ? get_unmapped_area+0x1f5/0x3f0 [ 61.091065] do_mmap+0x854/0xf00 [ 61.091509] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.092008] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.092577] ksys_mmap_pgoff+0x3af/0x500 [ 61.093088] do_syscall_64+0x3f/0x90 [ 61.093590] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.094242] RIP: 0033:0x7efe7dd54d82 [ 61.094708] 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 [ 61.096848] RSP: 002b:00007ffe72084f08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.097783] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efe7dd54d82 [ 61.098859] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efe7d18e000 [ 61.099713] RBP: 00007efe7d18e000 R08: 0000000000000009 R09: 0000000000001000 [ 61.100588] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562b4d4a4ec0 [ 61.101461] R13: 00007ffe72084f20 R14: 00007ffe72084f50 R15: 00007ffe720852b0 [ 61.102334] [ 61.102630] [ 61.102851] Allocated by task 213: [ 61.103283] kasan_save_stack+0x22/0x50 [ 61.103795] kasan_set_track+0x25/0x30 [ 61.104292] __kasan_slab_alloc+0x59/0x70 [ 61.104823] kmem_cache_alloc+0x16b/0x370 [ 61.105345] vm_area_dup+0x20/0x160 [ 61.105812] __split_vma+0x170/0x950 [ 61.106289] split_vma+0xc6/0x110 [ 61.106744] mprotect_fixup+0x8d2/0xb30 [ 61.107253] do_mprotect_pkey+0x87e/0xd40 [ 61.107791] __x64_sys_mprotect+0x78/0xc0 [ 61.108317] do_syscall_64+0x3f/0x90 [ 61.108802] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.109456] [ 61.109674] Freed by task 213: [ 61.110070] kasan_save_stack+0x22/0x50 [ 61.110582] kasan_set_track+0x25/0x30 [ 61.111079] kasan_save_free_info+0x2b/0x50 [ 61.111623] __kasan_slab_free+0x10a/0x190 [ 61.112165] kmem_cache_free+0x10d/0x4d0 [ 61.112681] rcu_core+0x8c8/0x2860 [ 61.113135] __do_softirq+0x1b7/0x7d4 [ 61.113642] [ 61.113863] Last potentially related work creation: [ 61.114454] kasan_save_stack+0x22/0x50 [ 61.114959] __kasan_record_aux_stack+0x8e/0xa0 [ 61.115531] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.116187] remove_vma+0x139/0x170 [ 61.116644] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.117205] do_vmi_munmap+0x1f1/0x2b0 [ 61.117705] __vm_munmap+0x138/0x3a0 [ 61.118179] __x64_sys_munmap+0x59/0x80 [ 61.118681] do_syscall_64+0x3f/0x90 [ 61.119169] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.119820] [ 61.120040] The buggy address belongs to the object at ffff88800eb60d98 [ 61.120040] which belongs to the cache vm_area_struct of size 168 [ 61.121539] The buggy address is located 88 bytes inside of [ 61.121539] freed 168-byte region [ffff88800eb60d98, ffff88800eb60e40) [ 61.122964] [ 61.123181] The buggy address belongs to the physical page: [ 61.123879] page:0000000023f71692 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb60 [ 61.125024] memcg:ffff8880098ff301 [ 61.125492] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.126174] page_type: 0xffffffff() [ 61.126639] raw: 0100000000000200 ffff8880087a0c80 ffffea00003c4e00 0000000000000008 [ 61.127605] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880098ff301 [ 61.128561] page dumped because: kasan: bad access detected [ 61.129254] [ 61.129488] Memory state around the buggy address: [ 61.130097] ffff88800eb60c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 61.130998] ffff88800eb60d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 61.131906] >ffff88800eb60d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 61.132797] ^ [ 61.133661] ffff88800eb60e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 61.134546] ffff88800eb60e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.135437] ================================================================== [ 61.136636] Disabling lock debugging due to kernel taint [ 62.640566] BUG: Bad rss-counter state mm:00000000d64ff4ec type:MM_FILEPAGES val:33 [ 62.641306] BUG: Bad rss-counter state mm:00000000d64ff4ec type:MM_ANONPAGES val:22 [ 63.106375] BUG: Bad rss-counter state mm:00000000993daeb8 type:MM_FILEPAGES val:33 [ 63.107604] BUG: Bad rss-counter state mm:00000000993daeb8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62863' (ECDSA) to the list of known hosts. 2023/06/20 11:40:20 fuzzer started 2023/06/20 11:40:20 dialing manager at localhost:36067 2023/06/20 11:40:20 checking machine... 2023/06/20 11:40:20 checking revisions... [ 63.805249] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:40:20 testing simple program... [ 63.851278] cgroup: Unknown subsys name 'net' [ 63.882396] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:40:20 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=ffffffff86138e01 RDX=1ffff110033c7e71 RSI=ffffffff8180c705 RDI=ffff888019e3f388 RBP=ffff888019e3f420 RSP=ffff888019e3f360 R8 =ffffffff86138e90 R9 =ffff888019e3f3c8 R10=0000000000038001 R11=0000000000020d8f R12=ffff888019e3f450 R13=0000000000000000 R14=ffff888018f61b40 R15=ffff888019e3f388 RIP=ffffffff811305f0 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 00007f47c8157900 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=00007ffeabaed000 CR3=0000000019e5a000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f94c2e640a0 CR3=0000000009720000 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=2039313a30343a3131203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039313a30343a3131203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000