syzkaller login: [ 38.952571] BUG: Bad rss-counter state mm:000000007c6b5a2a type:MM_FILEPAGES val:33 [ 38.953733] BUG: Bad rss-counter state mm:000000007c6b5a2a type:MM_ANONPAGES val:22 [ 39.161974] ================================================================== [ 39.163006] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.164168] Read of size 8 at addr ffff88800dfdbb38 by task sshd/222 [ 39.165039] [ 39.165247] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.166051] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.166980] Call Trace: [ 39.167279] [ 39.167546] dump_stack_lvl+0x91/0xf0 [ 39.168008] print_report+0xcc/0x620 [ 39.168473] ? __virt_addr_valid+0x102/0x340 [ 39.168989] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.169572] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.170156] kasan_report+0xbe/0xf0 [ 39.170612] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.171203] vma_interval_tree_remove+0xc75/0xec0 [ 39.171791] vma_prepare+0xc54/0x11a0 [ 39.172276] __split_vma+0x5af/0x950 [ 39.172733] ? __pfx___split_vma+0x10/0x10 [ 39.173241] ? find_held_lock+0x2c/0x110 [ 39.173743] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.174288] ? lock_is_held_type+0x9f/0x120 [ 39.174813] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.175392] ? mtree_range_walk+0x632/0x900 [ 39.175930] ? mas_walk+0x5c7/0x7c0 [ 39.176395] do_vmi_munmap+0x1f1/0x2b0 [ 39.176871] mmap_region+0x1f9/0x2660 [ 39.177333] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.177832] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.178518] ? __pfx_lock_acquire+0x10/0x10 [ 39.179040] ? __pfx_mmap_region+0x10/0x10 [ 39.179558] ? security_mmap_addr+0x7d/0xa0 [ 39.180073] ? get_unmapped_area+0x1f5/0x3f0 [ 39.180611] do_mmap+0x854/0xf00 [ 39.181037] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.181512] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.182055] ksys_mmap_pgoff+0x3af/0x500 [ 39.182547] do_syscall_64+0x3f/0x90 [ 39.183016] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.183637] RIP: 0033:0x7fbe30755d82 [ 39.184080] 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 [ 39.186146] RSP: 002b:00007fff62543968 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.186992] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbe30755d82 [ 39.187792] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbe2fb8f000 [ 39.188622] RBP: 00007fbe2fb8f000 R08: 0000000000000009 R09: 0000000000001000 [ 39.189444] R10: 0000000000000812 R11: 0000000000000206 R12: 00005654d847dec0 [ 39.190264] R13: 00007fff62543980 R14: 00007fff625439b0 R15: 00007fff62543d10 [ 39.191102] [ 39.191378] [ 39.191592] Allocated by task 212: [ 39.192008] kasan_save_stack+0x22/0x50 [ 39.192505] kasan_set_track+0x25/0x30 [ 39.192982] __kasan_slab_alloc+0x59/0x70 [ 39.193481] kmem_cache_alloc+0x16b/0x370 [ 39.193984] vm_area_dup+0x20/0x160 [ 39.194424] __split_vma+0x170/0x950 [ 39.194876] split_vma+0xc6/0x110 [ 39.195302] mprotect_fixup+0x8d2/0xb30 [ 39.195808] do_mprotect_pkey+0x87e/0xd40 [ 39.196332] __x64_sys_mprotect+0x78/0xc0 [ 39.196850] do_syscall_64+0x3f/0x90 [ 39.197311] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.197927] [ 39.198141] Freed by task 212: [ 39.198527] kasan_save_stack+0x22/0x50 [ 39.199025] kasan_set_track+0x25/0x30 [ 39.199508] kasan_save_free_info+0x2b/0x50 [ 39.200025] __kasan_slab_free+0x10a/0x190 [ 39.200551] kmem_cache_free+0x10d/0x4d0 [ 39.201043] rcu_core+0x8c8/0x2860 [ 39.201471] __do_softirq+0x1b7/0x7d4 [ 39.201940] [ 39.202148] Last potentially related work creation: [ 39.202708] kasan_save_stack+0x22/0x50 [ 39.203196] __kasan_record_aux_stack+0x8e/0xa0 [ 39.203755] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.204386] remove_vma+0x139/0x170 [ 39.204819] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.205363] do_vmi_munmap+0x1f1/0x2b0 [ 39.205843] __vm_munmap+0x138/0x3a0 [ 39.206297] __x64_sys_munmap+0x59/0x80 [ 39.206792] do_syscall_64+0x3f/0x90 [ 39.207249] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.207871] [ 39.208084] Second to last potentially related work creation: [ 39.208758] kasan_save_stack+0x22/0x50 [ 39.209246] __kasan_record_aux_stack+0x8e/0xa0 [ 39.209808] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.210433] remove_vma+0x139/0x170 [ 39.210878] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.211424] do_vmi_munmap+0x1f1/0x2b0 [ 39.211910] mmap_region+0x1f9/0x2660 [ 39.212381] do_mmap+0x854/0xf00 [ 39.212810] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.213281] ksys_mmap_pgoff+0x3af/0x500 [ 39.213774] do_syscall_64+0x3f/0x90 [ 39.214242] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.214875] [ 39.215091] The buggy address belongs to the object at ffff88800dfdbae0 [ 39.215091] which belongs to the cache vm_area_struct of size 168 [ 39.216525] The buggy address is located 88 bytes inside of [ 39.216525] freed 168-byte region [ffff88800dfdbae0, ffff88800dfdbb88) [ 39.217899] [ 39.218109] The buggy address belongs to the physical page: [ 39.218754] page:0000000047747f76 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdfdb [ 39.219802] memcg:ffff88800daf0e01 [ 39.220233] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.220854] page_type: 0xffffffff() [ 39.221297] raw: 0100000000000200 ffff88800879fc80 ffffea000037db80 dead000000000006 [ 39.222189] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800daf0e01 [ 39.223070] page dumped because: kasan: bad access detected [ 39.223701] [ 39.223905] Memory state around the buggy address: [ 39.224467] ffff88800dfdba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.225254] ffff88800dfdba80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 39.226079] >ffff88800dfdbb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.226893] ^ [ 39.227478] ffff88800dfdbb80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 39.228310] ffff88800dfdbc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 39.229133] ================================================================== [ 39.230127] Disabling lock debugging due to kernel taint [ 41.809317] BUG: Bad rss-counter state mm:0000000060bbb5bf type:MM_FILEPAGES val:33 [ 41.810047] BUG: Bad rss-counter state mm:0000000060bbb5bf type:MM_ANONPAGES val:22 [ 42.294377] BUG: Bad rss-counter state mm:00000000d5107937 type:MM_FILEPAGES val:33 [ 42.295658] BUG: Bad rss-counter state mm:00000000d5107937 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24347' (ECDSA) to the list of known hosts. 2023/06/19 20:10:41 fuzzer started 2023/06/19 20:10:41 dialing manager at localhost:44161 2023/06/19 20:10:41 checking machine... 2023/06/19 20:10:41 checking revisions... [ 42.989312] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:10:41 testing simple program... [ 43.038857] cgroup: Unknown subsys name 'net' [ 43.077843] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:10:30 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007ffc62e0d828 CR3=000000000ee74000 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=2030343a30313a3032203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a30313a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888008e57958 RCX=0000000000000001 RDX=1ffff110011caf2d RSI=ffff888008e57a88 RDI=ffff888008e57968 RBP=ffff888008e57a88 RSP=ffff888008e578b0 R8 =ffffffff860d68fa R9 =ffff888008e57998 R10=0000000000038001 R11=0000000000010b7e R12=0000000000000008 R13=ffff888008e50000 R14=ffff888008e57a90 R15=ffff888008e57958 RIP=ffffffff81130468 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 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=00007fcba2a3c618 CR3=000000000d794000 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