syzkaller login: [ 31.665976] BUG: Bad rss-counter state mm:000000007e5ecfb9 type:MM_FILEPAGES val:33 [ 31.667079] BUG: Bad rss-counter state mm:000000007e5ecfb9 type:MM_ANONPAGES val:22 [ 31.844853] ================================================================== [ 31.845739] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.846869] Read of size 8 at addr ffff88800ee35058 by task sshd/220 [ 31.847825] [ 31.848044] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.848933] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.849949] Call Trace: [ 31.850280] [ 31.850576] dump_stack_lvl+0x91/0xf0 [ 31.851081] print_report+0xcc/0x620 [ 31.851583] ? __virt_addr_valid+0x102/0x340 [ 31.852165] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.852817] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.853568] kasan_report+0xbe/0xf0 [ 31.854055] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.854756] vma_interval_tree_remove+0xc75/0xec0 [ 31.855426] vma_prepare+0xc54/0x11a0 [ 31.855908] __split_vma+0x5af/0x950 [ 31.856508] ? __pfx___split_vma+0x10/0x10 [ 31.857081] ? find_held_lock+0x2c/0x110 [ 31.857607] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.858332] ? lock_is_held_type+0x9f/0x120 [ 31.858924] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.859547] ? mtree_range_walk+0x632/0x900 [ 31.860104] ? mas_walk+0x5c7/0x7c0 [ 31.860598] do_vmi_munmap+0x1f1/0x2b0 [ 31.861107] mmap_region+0x1f9/0x2660 [ 31.861605] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.862292] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.863058] ? __pfx_lock_acquire+0x10/0x10 [ 31.863702] ? __pfx_mmap_region+0x10/0x10 [ 31.864284] ? security_mmap_addr+0x7d/0xa0 [ 31.864951] ? get_unmapped_area+0x1f5/0x3f0 [ 31.865502] do_mmap+0x854/0xf00 [ 31.865980] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.866601] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.867211] ksys_mmap_pgoff+0x3af/0x500 [ 31.867827] do_syscall_64+0x3f/0x90 [ 31.868339] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.869056] RIP: 0033:0x7f970a928d82 [ 31.869627] 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 [ 31.871929] RSP: 002b:00007ffcf729fbd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.872865] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f970a928d82 [ 31.873733] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9709d62000 [ 31.874615] RBP: 00007f9709d62000 R08: 0000000000000009 R09: 0000000000001000 [ 31.875580] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d1cee9eec0 [ 31.876553] R13: 00007ffcf729fbf0 R14: 00007ffcf729fc20 R15: 00007ffcf729ff80 [ 31.877452] [ 31.877748] [ 31.877964] Allocated by task 213: [ 31.878477] kasan_save_stack+0x22/0x50 [ 31.879074] kasan_set_track+0x25/0x30 [ 31.879577] __kasan_slab_alloc+0x59/0x70 [ 31.880150] kmem_cache_alloc+0x16b/0x370 [ 31.880808] vm_area_dup+0x20/0x160 [ 31.881293] __split_vma+0x170/0x950 [ 31.881890] split_vma+0xc6/0x110 [ 31.882342] mprotect_fixup+0x8d2/0xb30 [ 31.882852] do_mprotect_pkey+0x87e/0xd40 [ 31.883381] __x64_sys_mprotect+0x78/0xc0 [ 31.883904] do_syscall_64+0x3f/0x90 [ 31.884408] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.885061] [ 31.885282] Freed by task 210: [ 31.885687] kasan_save_stack+0x22/0x50 [ 31.886203] kasan_set_track+0x25/0x30 [ 31.886710] kasan_save_free_info+0x2b/0x50 [ 31.887268] __kasan_slab_free+0x10a/0x190 [ 31.887950] kmem_cache_free+0x10d/0x4d0 [ 31.888534] rcu_core+0x8c8/0x2860 [ 31.889127] __do_softirq+0x1b7/0x7d4 [ 31.889636] [ 31.889859] Last potentially related work creation: [ 31.890453] kasan_save_stack+0x22/0x50 [ 31.891131] __kasan_record_aux_stack+0x8e/0xa0 [ 31.891721] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.892468] remove_vma+0x139/0x170 [ 31.893010] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.893577] do_vmi_munmap+0x1f1/0x2b0 [ 31.894154] __vm_munmap+0x138/0x3a0 [ 31.894704] __x64_sys_munmap+0x59/0x80 [ 31.895204] do_syscall_64+0x3f/0x90 [ 31.895706] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.896505] [ 31.896727] The buggy address belongs to the object at ffff88800ee35000 [ 31.896727] which belongs to the cache vm_area_struct of size 168 [ 31.898420] The buggy address is located 88 bytes inside of [ 31.898420] freed 168-byte region [ffff88800ee35000, ffff88800ee350a8) [ 31.900013] [ 31.900335] The buggy address belongs to the physical page: [ 31.901039] page:000000008e1df757 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee35 [ 31.902198] memcg:ffff888019faa601 [ 31.902726] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.903420] page_type: 0xffffffff() [ 31.903986] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.904934] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019faa601 [ 31.905850] page dumped because: kasan: bad access detected [ 31.906509] [ 31.906729] Memory state around the buggy address: [ 31.907479] ffff88800ee34f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 31.908355] ffff88800ee34f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.909212] >ffff88800ee35000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.910068] ^ [ 31.910958] ffff88800ee35080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.911839] ffff88800ee35100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.912710] ================================================================== [ 31.913817] Disabling lock debugging due to kernel taint [ 34.533095] BUG: Bad rss-counter state mm:00000000b95c2482 type:MM_FILEPAGES val:33 [ 34.534166] BUG: Bad rss-counter state mm:00000000b95c2482 type:MM_ANONPAGES val:22 [ 35.122172] BUG: Bad rss-counter state mm:0000000083bff71a type:MM_FILEPAGES val:33 [ 35.123322] BUG: Bad rss-counter state mm:0000000083bff71a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57692' (ECDSA) to the list of known hosts. 2023/06/21 08:26:07 fuzzer started 2023/06/21 08:26:07 dialing manager at localhost:36067 2023/06/21 08:26:07 checking machine... 2023/06/21 08:26:07 checking revisions... [ 35.822435] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:26:07 testing simple program... [ 35.875673] cgroup: Unknown subsys name 'net' [ 35.931719] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:26:07 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff86138f52 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff888008d9f9d0 RSP=ffff888008d9f908 R8 =ffffffff86138f56 R9 =ffff888008d9f9b8 R10=0000000000038001 R11=0000000000020db7 R12=ffff888008d9f9d8 R13=ffff888008d9f9c0 R14=0000000000000005 R15=ffff888008d9f978 RIP=ffffffff81130b3f 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 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=00007f871e38a650 CR3=000000001cc52000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800977a720 RCX=ffff88800844f780 RDX=ffffea000025de80 RSI=0000000000000008 RDI=ffffffff81806333 RBP=0000000000000000 RSP=ffff88801478f628 R8 =ffff88800977a260 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000d000c R12=dffffc0000000000 R13=ffff88801478f668 R14=ffff88800844f780 R15=ffff88800977aab0 RIP=ffffffff81810316 RFL=00000202 [-------] 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 00007f08ae4ff900 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=00007f08ad98d9a0 CR3=000000000c5c0000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=88500a2e12e5b9d200000000000ae988 XMM05=fee372bea6e6845000000000001331c8 XMM06=19e9129bd510f2350000000000132060 XMM07=fb795ef6d657705600000000001221e8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000