syzkaller login: [ 31.252119] BUG: Bad rss-counter state mm:00000000bf655566 type:MM_FILEPAGES val:33 [ 31.253107] BUG: Bad rss-counter state mm:00000000bf655566 type:MM_ANONPAGES val:22 [ 31.442315] ================================================================== [ 31.443380] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.444666] Read of size 8 at addr ffff888015cbb4e0 by task sshd/221 [ 31.445582] [ 31.445869] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.446901] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.448033] Call Trace: [ 31.448419] [ 31.448757] dump_stack_lvl+0x91/0xf0 [ 31.449345] print_report+0xcc/0x620 [ 31.449934] ? __virt_addr_valid+0x102/0x340 [ 31.450599] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.451338] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.452084] kasan_report+0xbe/0xf0 [ 31.452637] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.453371] vma_interval_tree_remove+0xc75/0xec0 [ 31.454115] vma_prepare+0xc54/0x11a0 [ 31.454694] __split_vma+0x5af/0x950 [ 31.455271] ? __pfx___split_vma+0x10/0x10 [ 31.455889] ? find_held_lock+0x2c/0x110 [ 31.456518] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.457197] ? lock_is_held_type+0x9f/0x120 [ 31.457894] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.458641] ? mtree_range_walk+0x632/0x900 [ 31.459282] ? mas_walk+0x5c7/0x7c0 [ 31.459878] do_vmi_munmap+0x1f1/0x2b0 [ 31.460450] mmap_region+0x1f9/0x2660 [ 31.461034] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.461641] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.462519] ? __pfx_lock_acquire+0x10/0x10 [ 31.463100] ? __pfx_mmap_region+0x10/0x10 [ 31.463739] ? security_mmap_addr+0x7d/0xa0 [ 31.464358] ? get_unmapped_area+0x1f5/0x3f0 [ 31.465030] do_mmap+0x854/0xf00 [ 31.465552] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.466162] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.466837] ksys_mmap_pgoff+0x3af/0x500 [ 31.467462] do_syscall_64+0x3f/0x90 [ 31.468048] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.468807] RIP: 0033:0x7f6a3fb03d82 [ 31.469336] 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 [ 31.471932] RSP: 002b:00007fff0488f918 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.473055] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6a3fb03d82 [ 31.474149] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6a3ef3d000 [ 31.475222] RBP: 00007f6a3ef3d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.476273] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a740b63f70 [ 31.477330] R13: 00007fff0488f930 R14: 00007fff0488f960 R15: 00007fff0488fcc0 [ 31.478417] [ 31.478779] [ 31.479044] Allocated by task 214: [ 31.479578] kasan_save_stack+0x22/0x50 [ 31.480197] kasan_set_track+0x25/0x30 [ 31.480811] __kasan_slab_alloc+0x59/0x70 [ 31.481455] kmem_cache_alloc+0x16b/0x370 [ 31.482115] vm_area_dup+0x20/0x160 [ 31.482676] __split_vma+0x170/0x950 [ 31.483259] split_vma+0xc6/0x110 [ 31.483805] mprotect_fixup+0x8d2/0xb30 [ 31.484429] do_mprotect_pkey+0x87e/0xd40 [ 31.485166] __x64_sys_mprotect+0x78/0xc0 [ 31.485841] do_syscall_64+0x3f/0x90 [ 31.486435] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.487251] [ 31.487504] Freed by task 211: [ 31.487998] kasan_save_stack+0x22/0x50 [ 31.488627] kasan_set_track+0x25/0x30 [ 31.489250] kasan_save_free_info+0x2b/0x50 [ 31.489929] __kasan_slab_free+0x10a/0x190 [ 31.490592] kmem_cache_free+0x10d/0x4d0 [ 31.491220] rcu_core+0x8c8/0x2860 [ 31.491757] __do_softirq+0x1b7/0x7d4 [ 31.492346] [ 31.492611] Last potentially related work creation: [ 31.493324] kasan_save_stack+0x22/0x50 [ 31.493953] __kasan_record_aux_stack+0x8e/0xa0 [ 31.494664] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.495448] remove_vma+0x139/0x170 [ 31.496016] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.496696] do_vmi_munmap+0x1f1/0x2b0 [ 31.497298] __vm_munmap+0x138/0x3a0 [ 31.497895] __x64_sys_munmap+0x59/0x80 [ 31.498486] do_syscall_64+0x3f/0x90 [ 31.499046] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.499764] [ 31.500005] Second to last potentially related work creation: [ 31.500818] kasan_save_stack+0x22/0x50 [ 31.501433] __kasan_record_aux_stack+0x8e/0xa0 [ 31.502165] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.502949] remove_vma+0x139/0x170 [ 31.503512] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.504212] do_vmi_munmap+0x1f1/0x2b0 [ 31.504811] mmap_region+0x1f9/0x2660 [ 31.505400] do_mmap+0x854/0xf00 [ 31.505957] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.506552] ksys_mmap_pgoff+0x3af/0x500 [ 31.507184] do_syscall_64+0x3f/0x90 [ 31.507752] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.508536] [ 31.508790] The buggy address belongs to the object at ffff888015cbb488 [ 31.508790] which belongs to the cache vm_area_struct of size 168 [ 31.510612] The buggy address is located 88 bytes inside of [ 31.510612] freed 168-byte region [ffff888015cbb488, ffff888015cbb530) [ 31.512294] [ 31.512560] The buggy address belongs to the physical page: [ 31.513355] page:0000000036a7e056 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15cbb [ 31.514711] memcg:ffff88800ebaac01 [ 31.515221] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.516026] page_type: 0xffffffff() [ 31.516573] raw: 0100000000000200 ffff8880087a0c80 ffffea000039bf40 dead000000000008 [ 31.517707] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ebaac01 [ 31.518821] page dumped because: kasan: bad access detected [ 31.519633] [ 31.519899] Memory state around the buggy address: [ 31.520622] ffff888015cbb380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.521580] ffff888015cbb400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.522574] >ffff888015cbb480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.523548] ^ [ 31.524405] ffff888015cbb500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.525384] ffff888015cbb580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.526359] ================================================================== [ 31.527426] Disabling lock debugging due to kernel taint [ 33.545390] BUG: Bad rss-counter state mm:0000000026dad7b6 type:MM_FILEPAGES val:33 [ 33.546587] BUG: Bad rss-counter state mm:0000000026dad7b6 type:MM_ANONPAGES val:22 [ 33.974745] BUG: Bad rss-counter state mm:000000001928d1f4 type:MM_FILEPAGES val:33 [ 33.975967] BUG: Bad rss-counter state mm:000000001928d1f4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1580' (ECDSA) to the list of known hosts. 2023/06/21 07:42:10 fuzzer started 2023/06/21 07:42:10 dialing manager at localhost:36067 2023/06/21 07:42:10 checking machine... 2023/06/21 07:42:10 checking revisions... [ 34.694462] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:42:11 testing simple program... [ 34.746011] cgroup: Unknown subsys name 'net' [ 34.783338] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:42:10 Registers: info registers vcpu 0 RAX=ffffffff863b2ee7 RBX=0000000000000001 RCX=ffffffff863b2ee2 RDX=0000000000000002 RSI=0000000000000007 RDI=ffffffff85fa4b00 RBP=ffff888019f9f468 RSP=ffff888019f9f3a0 R8 =ffffffff863b2ee2 R9 =ffff888019f9f450 R10=0000000000038001 R11=000000000008a84f R12=ffff888019f9f470 R13=ffff888019f9f458 R14=ffff888019f9f451 R15=ffff888019f9f410 RIP=ffffffff81130a72 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 00007fe77f6c3900 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=00007fe77fc7a618 CR3=000000001a3f8000 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=0000000000000000 RBX=0000000000000001 RCX=ffffffff812e0473 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff84535ffc RSP=ffff888017c1f7f0 R8 =0000000000000000 R9 =ffffed1001995f7c R10=ffff88800ccafbe3 R11=0000000000000000 R12=ffff88800ccafc70 R13=ffff88800ccafc20 R14=ffffffff81c63c8c R15=0000000000000000 RIP=ffffffff8180fea0 RFL=00000056 [---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 00007f2f8127d700 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=00007fd5a9bb5630 CR3=0000000018d24000 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=2030313a32343a3730203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030313a32343a3730203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000