syzkaller login: [ 38.739613] BUG: Bad rss-counter state mm:000000006fc20a6d type:MM_FILEPAGES val:33 [ 38.740989] BUG: Bad rss-counter state mm:000000006fc20a6d type:MM_ANONPAGES val:22 [ 38.898531] ================================================================== [ 38.899704] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.900909] Read of size 8 at addr ffff88800e112c20 by task sshd/220 [ 38.902048] [ 38.902321] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.903414] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.904658] Call Trace: [ 38.905097] [ 38.905441] dump_stack_lvl+0x91/0xf0 [ 38.905972] print_report+0xcc/0x620 [ 38.906494] ? __virt_addr_valid+0x102/0x340 [ 38.907093] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.907756] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.908436] kasan_report+0xbe/0xf0 [ 38.908961] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.909646] vma_interval_tree_remove+0xc75/0xec0 [ 38.910300] vma_prepare+0xc54/0x11a0 [ 38.910827] __split_vma+0x5af/0x950 [ 38.911342] ? __pfx___split_vma+0x10/0x10 [ 38.912002] ? find_held_lock+0x2c/0x110 [ 38.912637] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.913352] ? lock_is_held_type+0x9f/0x120 [ 38.914004] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.914751] ? mtree_range_walk+0x632/0x900 [ 38.915435] ? mas_walk+0x5c7/0x7c0 [ 38.916022] do_vmi_munmap+0x1f1/0x2b0 [ 38.916615] mmap_region+0x1f9/0x2660 [ 38.917218] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.917831] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.918711] ? __pfx_lock_acquire+0x10/0x10 [ 38.919355] ? __pfx_mmap_region+0x10/0x10 [ 38.920006] ? security_mmap_addr+0x7d/0xa0 [ 38.920644] ? get_unmapped_area+0x1f5/0x3f0 [ 38.921319] do_mmap+0x854/0xf00 [ 38.921856] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.922447] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.923122] ksys_mmap_pgoff+0x3af/0x500 [ 38.923739] do_syscall_64+0x3f/0x90 [ 38.924321] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.925126] RIP: 0033:0x7f7ff1d32d82 [ 38.925675] 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 [ 38.928277] RSP: 002b:00007ffdacab9c98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.929404] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7ff1d32d82 [ 38.930445] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7ff116c000 [ 38.931473] RBP: 00007f7ff116c000 R08: 0000000000000009 R09: 0000000000001000 [ 38.932507] R10: 0000000000000812 R11: 0000000000000206 R12: 00005607404adec0 [ 38.933558] R13: 00007ffdacab9cb0 R14: 00007ffdacab9ce0 R15: 00007ffdacaba040 [ 38.934596] [ 38.934954] [ 38.935209] Allocated by task 213: [ 38.935725] kasan_save_stack+0x22/0x50 [ 38.936331] kasan_set_track+0x25/0x30 [ 38.936928] __kasan_slab_alloc+0x59/0x70 [ 38.937552] kmem_cache_alloc+0x16b/0x370 [ 38.938168] vm_area_dup+0x20/0x160 [ 38.938712] __split_vma+0x170/0x950 [ 38.939272] split_vma+0xc6/0x110 [ 38.939807] mprotect_fixup+0x8d2/0xb30 [ 38.940410] do_mprotect_pkey+0x87e/0xd40 [ 38.941055] __x64_sys_mprotect+0x78/0xc0 [ 38.941673] do_syscall_64+0x3f/0x90 [ 38.942292] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.943074] [ 38.943332] Freed by task 213: [ 38.943802] kasan_save_stack+0x22/0x50 [ 38.944411] kasan_set_track+0x25/0x30 [ 38.944994] kasan_save_free_info+0x2b/0x50 [ 38.945499] __kasan_slab_free+0x10a/0x190 [ 38.946003] kmem_cache_free+0x10d/0x4d0 [ 38.946488] rcu_core+0x8c8/0x2860 [ 38.946910] __do_softirq+0x1b7/0x7d4 [ 38.947366] [ 38.947572] Last potentially related work creation: [ 38.948123] kasan_save_stack+0x22/0x50 [ 38.948647] __kasan_record_aux_stack+0x8e/0xa0 [ 38.949215] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.949902] remove_vma+0x139/0x170 [ 38.950370] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.950965] do_vmi_munmap+0x1f1/0x2b0 [ 38.951497] __vm_munmap+0x138/0x3a0 [ 38.952000] __x64_sys_munmap+0x59/0x80 [ 38.952549] do_syscall_64+0x3f/0x90 [ 38.953082] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.953781] [ 38.954018] Second to last potentially related work creation: [ 38.954768] kasan_save_stack+0x22/0x50 [ 38.955307] __kasan_record_aux_stack+0x8e/0xa0 [ 38.955939] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.956630] remove_vma+0x139/0x170 [ 38.957134] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.957748] do_vmi_munmap+0x1f1/0x2b0 [ 38.958270] mmap_region+0x1f9/0x2660 [ 38.958784] do_mmap+0x854/0xf00 [ 38.959251] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.959778] ksys_mmap_pgoff+0x3af/0x500 [ 38.960328] do_syscall_64+0x3f/0x90 [ 38.960844] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.961564] [ 38.961794] The buggy address belongs to the object at ffff88800e112bc8 [ 38.961794] which belongs to the cache vm_area_struct of size 168 [ 38.963408] The buggy address is located 88 bytes inside of [ 38.963408] freed 168-byte region [ffff88800e112bc8, ffff88800e112c70) [ 38.964960] [ 38.965193] The buggy address belongs to the physical page: [ 38.965916] page:0000000027cd5c7d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe112 [ 38.967098] memcg:ffff888009459b01 [ 38.967562] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.968270] page_type: 0xffffffff() [ 38.968758] raw: 0100000000000200 ffff8880087a0c80 ffffea0000387200 dead000000000006 [ 38.969785] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009459b01 [ 38.970769] page dumped because: kasan: bad access detected [ 38.971504] [ 38.971762] Memory state around the buggy address: [ 38.972377] ffff88800e112b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.973293] ffff88800e112b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 38.974195] >ffff88800e112c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.975092] ^ [ 38.975647] ffff88800e112c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 38.976553] ffff88800e112d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 38.977469] ================================================================== [ 38.978529] Disabling lock debugging due to kernel taint [ 41.434734] BUG: Bad rss-counter state mm:000000006bdba342 type:MM_FILEPAGES val:33 [ 41.435809] BUG: Bad rss-counter state mm:000000006bdba342 type:MM_ANONPAGES val:22 [ 41.830719] BUG: Bad rss-counter state mm:00000000f2b0b554 type:MM_FILEPAGES val:33 [ 41.831753] BUG: Bad rss-counter state mm:00000000f2b0b554 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55644' (ECDSA) to the list of known hosts. 2023/06/21 06:21:09 fuzzer started 2023/06/21 06:21:09 dialing manager at localhost:36067 2023/06/21 06:21:09 checking machine... 2023/06/21 06:21:09 checking revisions... [ 42.565592] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:21:09 testing simple program... [ 42.609330] cgroup: Unknown subsys name 'net' [ 42.649480] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:21:09 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888016ac3680 RSI=0000000000000081 RDI=ffff88800b5c8c98 RBP=ffff88800b5c8c98 RSP=ffff888016acf578 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00676f6c7379732f R12=0000000000000000 R13=0000000000000081 R14=ffffffff856f0da0 R15=ffff88800b5c8c9a RIP=ffffffff81eefc54 RFL=00000293 [--S-A-C] 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 00007f9fd28cd900 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=00007f9fd1d2d7a0 CR3=000000000cbfe000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=0c0a8e28593371a600000000000ae988 XMM05=3f79b09861f3f74800000000001339c8 XMM06=4fda316b135da52b0000000000132448 XMM07=fb795ef6d65770560000000000121670 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888008e37a18 RCX=0000000000000001 RDX=1ffff110011c6f44 RSI=ffffffff8118d7d9 RDI=ffff888008e37a20 RBP=0000000000000006 RSP=ffff888008e37930 R8 =0000000000000001 R9 =ffff888008e37990 R10=0000000000038001 R11=00000000000b5d59 R12=ffff888008e37a18 R13=0000000000000000 R14=ffff888008e0d1c0 R15=ffff888017d09e60 RIP=ffffffff813ad4be 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 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=00007ffcb3803000 CR3=000000000ed04000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000