syzkaller login: [ 44.064248] sshd (211) used greatest stack depth: 23992 bytes left [ 44.065629] BUG: Bad rss-counter state mm:0000000034c2e94e type:MM_FILEPAGES val:33 [ 44.067437] BUG: Bad rss-counter state mm:0000000034c2e94e type:MM_ANONPAGES val:22 [ 44.224761] ================================================================== [ 44.225834] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.226964] Read of size 8 at addr ffff88800e71fed8 by task sshd/218 [ 44.227854] [ 44.228136] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.229001] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.229969] Call Trace: [ 44.230306] [ 44.230602] dump_stack_lvl+0x91/0xf0 [ 44.231084] print_report+0xcc/0x620 [ 44.231565] ? __virt_addr_valid+0x102/0x340 [ 44.232116] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.232728] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.233338] kasan_report+0xbe/0xf0 [ 44.233806] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.234443] vma_interval_tree_remove+0xc75/0xec0 [ 44.235048] vma_prepare+0xc54/0x11a0 [ 44.235528] __split_vma+0x5af/0x950 [ 44.235992] ? __pfx___split_vma+0x10/0x10 [ 44.236518] ? find_held_lock+0x2c/0x110 [ 44.237052] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.237609] ? lock_is_held_type+0x9f/0x120 [ 44.238145] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.238752] ? mtree_range_walk+0x632/0x900 [ 44.239310] ? mas_walk+0x5c7/0x7c0 [ 44.239778] do_vmi_munmap+0x1f1/0x2b0 [ 44.240262] mmap_region+0x1f9/0x2660 [ 44.240741] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.241244] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.241959] ? __pfx_lock_acquire+0x10/0x10 [ 44.242488] ? __pfx_mmap_region+0x10/0x10 [ 44.243010] ? security_mmap_addr+0x7d/0xa0 [ 44.243537] ? get_unmapped_area+0x1f5/0x3f0 [ 44.244084] do_mmap+0x854/0xf00 [ 44.244515] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.244999] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.245559] ksys_mmap_pgoff+0x3af/0x500 [ 44.246062] do_syscall_64+0x3f/0x90 [ 44.246552] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.247183] RIP: 0033:0x7f39fd0b7d82 [ 44.247631] 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 [ 44.249724] RSP: 002b:00007ffee9d81578 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.250618] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f39fd0b7d82 [ 44.251448] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f39fc4f1000 [ 44.252280] RBP: 00007f39fc4f1000 R08: 0000000000000009 R09: 0000000000001000 [ 44.253111] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560a2d0dfec0 [ 44.253943] R13: 00007ffee9d81590 R14: 00007ffee9d815c0 R15: 00007ffee9d81920 [ 44.254793] [ 44.255078] [ 44.255293] Allocated by task 211: [ 44.255720] kasan_save_stack+0x22/0x50 [ 44.256215] kasan_set_track+0x25/0x30 [ 44.256706] __kasan_slab_alloc+0x59/0x70 [ 44.257221] kmem_cache_alloc+0x16b/0x370 [ 44.257725] vm_area_dup+0x20/0x160 [ 44.258177] __split_vma+0x170/0x950 [ 44.258654] split_vma+0xc6/0x110 [ 44.259088] mprotect_fixup+0x8d2/0xb30 [ 44.259593] do_mprotect_pkey+0x87e/0xd40 [ 44.260105] __x64_sys_mprotect+0x78/0xc0 [ 44.260615] do_syscall_64+0x3f/0x90 [ 44.261084] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.261719] [ 44.261932] Freed by task 211: [ 44.262323] kasan_save_stack+0x22/0x50 [ 44.262833] kasan_set_track+0x25/0x30 [ 44.263323] kasan_save_free_info+0x2b/0x50 [ 44.263848] __kasan_slab_free+0x10a/0x190 [ 44.264369] kmem_cache_free+0x10d/0x4d0 [ 44.264867] rcu_core+0x8c8/0x2860 [ 44.265300] __do_softirq+0x1b7/0x7d4 [ 44.265764] [ 44.265977] Last potentially related work creation: [ 44.266571] kasan_save_stack+0x22/0x50 [ 44.267064] __kasan_record_aux_stack+0x8e/0xa0 [ 44.267627] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.268256] remove_vma+0x139/0x170 [ 44.268703] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.269301] do_vmi_munmap+0x1f1/0x2b0 [ 44.269787] __vm_munmap+0x138/0x3a0 [ 44.270247] __x64_sys_munmap+0x59/0x80 [ 44.270756] do_syscall_64+0x3f/0x90 [ 44.271224] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.271854] [ 44.272066] The buggy address belongs to the object at ffff88800e71fe80 [ 44.272066] which belongs to the cache vm_area_struct of size 168 [ 44.273523] The buggy address is located 88 bytes inside of [ 44.273523] freed 168-byte region [ffff88800e71fe80, ffff88800e71ff28) [ 44.274915] [ 44.275130] The buggy address belongs to the physical page: [ 44.275785] page:00000000b0c8f450 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe71f [ 44.276844] memcg:ffff88800ed91501 [ 44.277270] flags: 0x100000000000200(slab|node=0|zone=1) [ 44.277909] page_type: 0xffffffff() [ 44.278352] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 44.279280] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed91501 [ 44.280182] page dumped because: kasan: bad access detected [ 44.280833] [ 44.281047] Memory state around the buggy address: [ 44.281624] ffff88800e71fd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 44.282474] ffff88800e71fe00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 44.283321] >ffff88800e71fe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.284160] ^ [ 44.284872] ffff88800e71ff00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 44.285742] ffff88800e71ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 44.286583] ================================================================== [ 44.287520] Disabling lock debugging due to kernel taint [ 46.578969] BUG: Bad rss-counter state mm:00000000ffad4711 type:MM_FILEPAGES val:33 [ 46.579982] BUG: Bad rss-counter state mm:00000000ffad4711 type:MM_ANONPAGES val:22 [ 47.159047] BUG: Bad rss-counter state mm:00000000f7fba119 type:MM_FILEPAGES val:33 [ 47.160204] BUG: Bad rss-counter state mm:00000000f7fba119 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31831' (ECDSA) to the list of known hosts. 2023/06/19 21:24:25 fuzzer started 2023/06/19 21:24:26 dialing manager at localhost:44161 2023/06/19 21:24:26 checking machine... 2023/06/19 21:24:26 checking revisions... [ 47.777964] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:24:26 testing simple program... [ 47.827752] cgroup: Unknown subsys name 'net' [ 47.892759] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:24:20 Registers: info registers vcpu 0 RAX=ffffffff8118ddc3 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffffffff8118ddc3 RDI=ffff88806ce09b60 RBP=ffff88806ce09b30 RSP=ffff88806ce09a90 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5c92 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800fbb1b30 RIP=ffffffff84532440 RFL=00000286 [--S--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=00007ffe7bc26fd8 CR3=0000000019d8a000 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=2035323a34323a3132203931206e754a XMM01=657463656e6e6f63736944203a5d3732 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3732325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035323a34323a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff83865ae0 RBX=1ffff110033fefbd RCX=0000000000000000 RDX=0000000000000000 RSI=ffff888019ff7e28 RDI=ffff888019285080 RBP=ffff888019285080 RSP=ffff888019ff7de0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffffffff84d653a0 R13=00007ffe95c72228 R14=00007ffe95c72224 R15=ffff888019ff7e28 RIP=ffffffff83865ae4 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 00007fd77d9c5900 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=00007fd77df7c618 CR3=000000000955c000 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