syzkaller login: [ 38.834317] BUG: Bad rss-counter state mm:00000000c7e83148 type:MM_FILEPAGES val:33 [ 38.835522] BUG: Bad rss-counter state mm:00000000c7e83148 type:MM_ANONPAGES val:22 [ 38.875741] ================================================================== [ 38.876805] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.877749] Read of size 8 at addr ffff88800f9c9228 by task sshd/219 [ 38.878523] [ 38.878742] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.879609] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.880662] Call Trace: [ 38.880980] [ 38.881260] dump_stack_lvl+0x91/0xf0 [ 38.881751] print_report+0xcc/0x620 [ 38.882248] ? __virt_addr_valid+0x102/0x340 [ 38.882835] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.883482] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.884111] kasan_report+0xbe/0xf0 [ 38.884595] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.885213] vma_interval_tree_remove+0xc75/0xec0 [ 38.885818] vma_prepare+0xc54/0x11a0 [ 38.886300] __split_vma+0x5af/0x950 [ 38.886806] ? __pfx___split_vma+0x10/0x10 [ 38.887336] ? find_held_lock+0x2c/0x110 [ 38.887894] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.888468] ? lock_is_held_type+0x9f/0x120 [ 38.889011] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.889624] ? mtree_range_walk+0x632/0x900 [ 38.890179] ? mas_walk+0x5c7/0x7c0 [ 38.890697] do_vmi_munmap+0x1f1/0x2b0 [ 38.891193] mmap_region+0x1f9/0x2660 [ 38.891722] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.892256] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.892976] ? __pfx_lock_acquire+0x10/0x10 [ 38.893509] ? __pfx_mmap_region+0x10/0x10 [ 38.894038] ? security_mmap_addr+0x7d/0xa0 [ 38.894606] ? get_unmapped_area+0x1f5/0x3f0 [ 38.895158] do_mmap+0x854/0xf00 [ 38.895638] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.896137] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.896716] ksys_mmap_pgoff+0x3af/0x500 [ 38.897228] do_syscall_64+0x3f/0x90 [ 38.897709] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.898359] RIP: 0033:0x7fa0f2521d82 [ 38.898857] 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 [ 38.900998] RSP: 002b:00007ffd847b54b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.901900] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa0f2521d82 [ 38.902870] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa0f195b000 [ 38.903766] RBP: 00007fa0f195b000 R08: 0000000000000009 R09: 0000000000001000 [ 38.904635] R10: 0000000000000812 R11: 0000000000000206 R12: 000056533a2beec0 [ 38.905506] R13: 00007ffd847b54d0 R14: 00007ffd847b5500 R15: 00007ffd847b5860 [ 38.906357] [ 38.906661] [ 38.906873] Allocated by task 212: [ 38.907307] kasan_save_stack+0x22/0x50 [ 38.907845] kasan_set_track+0x25/0x30 [ 38.908358] __kasan_slab_alloc+0x59/0x70 [ 38.908888] kmem_cache_alloc+0x16b/0x370 [ 38.909403] vm_area_dup+0x20/0x160 [ 38.909861] __split_vma+0x170/0x950 [ 38.910331] split_vma+0xc6/0x110 [ 38.910812] mprotect_fixup+0x8d2/0xb30 [ 38.911314] do_mprotect_pkey+0x87e/0xd40 [ 38.911873] __x64_sys_mprotect+0x78/0xc0 [ 38.912405] do_syscall_64+0x3f/0x90 [ 38.912884] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.913563] [ 38.913789] Freed by task 212: [ 38.914184] kasan_save_stack+0x22/0x50 [ 38.914719] kasan_set_track+0x25/0x30 [ 38.915219] kasan_save_free_info+0x2b/0x50 [ 38.915749] __kasan_slab_free+0x10a/0x190 [ 38.916299] kmem_cache_free+0x10d/0x4d0 [ 38.916818] rcu_core+0x8c8/0x2860 [ 38.917264] __do_softirq+0x1b7/0x7d4 [ 38.917744] [ 38.917957] Last potentially related work creation: [ 38.918545] kasan_save_stack+0x22/0x50 [ 38.919049] __kasan_record_aux_stack+0x8e/0xa0 [ 38.919625] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.920290] remove_vma+0x139/0x170 [ 38.920746] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.921310] do_vmi_munmap+0x1f1/0x2b0 [ 38.921800] __vm_munmap+0x138/0x3a0 [ 38.922270] __x64_sys_munmap+0x59/0x80 [ 38.922781] do_syscall_64+0x3f/0x90 [ 38.923261] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.923906] [ 38.924122] The buggy address belongs to the object at ffff88800f9c91d0 [ 38.924122] which belongs to the cache vm_area_struct of size 168 [ 38.925595] The buggy address is located 88 bytes inside of [ 38.925595] freed 168-byte region [ffff88800f9c91d0, ffff88800f9c9278) [ 38.927003] [ 38.927225] The buggy address belongs to the physical page: [ 38.927878] page:0000000074d40da4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf9c9 [ 38.928975] memcg:ffff88800e8d8e01 [ 38.929406] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.930050] page_type: 0xffffffff() [ 38.930502] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.931415] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e8d8e01 [ 38.932319] page dumped because: kasan: bad access detected [ 38.932980] [ 38.933197] Memory state around the buggy address: [ 38.933778] ffff88800f9c9100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.934624] ffff88800f9c9180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 38.935473] >ffff88800f9c9200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.936327] ^ [ 38.936883] ffff88800f9c9280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.937739] ffff88800f9c9300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.938586] ================================================================== [ 38.939683] Disabling lock debugging due to kernel taint [ 40.768219] BUG: Bad rss-counter state mm:0000000084e18005 type:MM_FILEPAGES val:33 [ 40.769769] BUG: Bad rss-counter state mm:0000000084e18005 type:MM_ANONPAGES val:22 [ 41.343117] BUG: Bad rss-counter state mm:000000006dd0569e type:MM_FILEPAGES val:33 [ 41.344283] BUG: Bad rss-counter state mm:000000006dd0569e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65301' (ECDSA) to the list of known hosts. 2023/06/21 07:44:42 fuzzer started 2023/06/21 07:44:43 dialing manager at localhost:36067 2023/06/21 07:44:43 checking machine... 2023/06/21 07:44:43 checking revisions... [ 42.002877] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:44:43 testing simple program... [ 42.058759] cgroup: Unknown subsys name 'net' [ 42.108426] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:44:42 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000004 RCX=ffffffff813ae2e1 RDX=ffffffff8542a6c0 RSI=0000000000000100 RDI=0000000000000005 RBP=dffffc0000000000 RSP=ffff88806ce09e68 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000004 R11=0000000000000000 R12=3ffffffffffffffe R13=fffffbfff0a81e40 R14=ffff888008c04050 R15=0000000000021b49 RIP=ffffffff814c0864 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 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=00007f99dd537080 CR3=0000000015cea000 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=2032343a34343a3730203132206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032343a34343a3730203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8453684b RDX=fffffbfff0adb095 RSI=0000000000000004 RDI=ffffffff856d84a0 RBP=ffffffff856d84a0 RSP=ffff888017c477a0 R8 =0000000000000000 R9 =fffffbfff0adb094 R10=ffffffff856d84a3 R11=00000000000b6a61 R12=0000000000000003 R13=fffffbfff0adb094 R14=0000000000000001 R15=1ffff11002f88ef5 RIP=ffffffff845368c8 RFL=00000002 [-------] 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 00007fa09b16e900 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=00007fa09b725618 CR3=0000000019ca0000 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=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