syzkaller login: [ 30.552800] BUG: Bad rss-counter state mm:00000000a8ae50b9 type:MM_FILEPAGES val:33 [ 30.553821] BUG: Bad rss-counter state mm:00000000a8ae50b9 type:MM_ANONPAGES val:22 [ 30.722832] ================================================================== [ 30.723747] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.724691] Read of size 8 at addr ffff88800f0f9968 by task sshd/221 [ 30.725515] [ 30.725777] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.726639] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.727612] Call Trace: [ 30.727982] [ 30.728267] dump_stack_lvl+0x91/0xf0 [ 30.728757] print_report+0xcc/0x620 [ 30.729241] ? __virt_addr_valid+0x102/0x340 [ 30.729820] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.730439] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.731054] kasan_report+0xbe/0xf0 [ 30.731527] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.732160] vma_interval_tree_remove+0xc75/0xec0 [ 30.732765] vma_prepare+0xc54/0x11a0 [ 30.733254] __split_vma+0x5af/0x950 [ 30.733743] ? __pfx___split_vma+0x10/0x10 [ 30.734289] ? find_held_lock+0x2c/0x110 [ 30.734822] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.735402] ? lock_is_held_type+0x9f/0x120 [ 30.735947] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.736558] ? mtree_range_walk+0x632/0x900 [ 30.737118] ? mas_walk+0x5c7/0x7c0 [ 30.737608] do_vmi_munmap+0x1f1/0x2b0 [ 30.738109] mmap_region+0x1f9/0x2660 [ 30.738593] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.739114] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.739840] ? __pfx_lock_acquire+0x10/0x10 [ 30.740385] ? __pfx_mmap_region+0x10/0x10 [ 30.740912] ? security_mmap_addr+0x7d/0xa0 [ 30.741473] ? get_unmapped_area+0x1f5/0x3f0 [ 30.742037] do_mmap+0x854/0xf00 [ 30.742484] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.742984] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.743555] ksys_mmap_pgoff+0x3af/0x500 [ 30.744064] do_syscall_64+0x3f/0x90 [ 30.744556] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.745210] RIP: 0033:0x7fee43976d82 [ 30.745680] 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 [ 30.747854] RSP: 002b:00007ffdc2eeba58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.748776] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fee43976d82 [ 30.749639] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fee42db0000 [ 30.750507] RBP: 00007fee42db0000 R08: 0000000000000009 R09: 0000000000001000 [ 30.751364] R10: 0000000000000812 R11: 0000000000000206 R12: 000055adf1e1eec0 [ 30.752225] R13: 00007ffdc2eeba70 R14: 00007ffdc2eebaa0 R15: 00007ffdc2eebe00 [ 30.753086] [ 30.753400] [ 30.753618] Allocated by task 213: [ 30.754049] kasan_save_stack+0x22/0x50 [ 30.754574] kasan_set_track+0x25/0x30 [ 30.755072] __kasan_slab_alloc+0x59/0x70 [ 30.755614] kmem_cache_alloc+0x16b/0x370 [ 30.756131] vm_area_dup+0x20/0x160 [ 30.756598] __split_vma+0x170/0x950 [ 30.757068] split_vma+0xc6/0x110 [ 30.757531] mprotect_fixup+0x8d2/0xb30 [ 30.758038] do_mprotect_pkey+0x87e/0xd40 [ 30.758573] __x64_sys_mprotect+0x78/0xc0 [ 30.759097] do_syscall_64+0x3f/0x90 [ 30.759572] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.760218] [ 30.760434] Freed by task 213: [ 30.760831] kasan_save_stack+0x22/0x50 [ 30.761338] kasan_set_track+0x25/0x30 [ 30.761857] kasan_save_free_info+0x2b/0x50 [ 30.762404] __kasan_slab_free+0x10a/0x190 [ 30.762945] kmem_cache_free+0x10d/0x4d0 [ 30.763471] rcu_core+0x8c8/0x2860 [ 30.763923] __do_softirq+0x1b7/0x7d4 [ 30.764407] [ 30.764624] Last potentially related work creation: [ 30.765217] kasan_save_stack+0x22/0x50 [ 30.765732] __kasan_record_aux_stack+0x8e/0xa0 [ 30.766308] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.766970] remove_vma+0x139/0x170 [ 30.767432] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.768001] do_vmi_munmap+0x1f1/0x2b0 [ 30.768494] __vm_munmap+0x138/0x3a0 [ 30.768972] __x64_sys_munmap+0x59/0x80 [ 30.769486] do_syscall_64+0x3f/0x90 [ 30.769960] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.770617] [ 30.770832] Second to last potentially related work creation: [ 30.771532] kasan_save_stack+0x22/0x50 [ 30.772045] __kasan_record_aux_stack+0x8e/0xa0 [ 30.772625] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.773271] remove_vma+0x139/0x170 [ 30.773739] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.774304] do_vmi_munmap+0x1f1/0x2b0 [ 30.774798] mmap_region+0x1f9/0x2660 [ 30.775278] do_mmap+0x854/0xf00 [ 30.775709] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.776199] ksys_mmap_pgoff+0x7d/0x500 [ 30.776692] do_syscall_64+0x3f/0x90 [ 30.777175] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.777834] [ 30.778052] The buggy address belongs to the object at ffff88800f0f9910 [ 30.778052] which belongs to the cache vm_area_struct of size 168 [ 30.779550] The buggy address is located 88 bytes inside of [ 30.779550] freed 168-byte region [ffff88800f0f9910, ffff88800f0f99b8) [ 30.780980] [ 30.781200] The buggy address belongs to the physical page: [ 30.781881] page:000000004a45c731 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf0f9 [ 30.782989] memcg:ffff88800c77d801 [ 30.783427] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.784081] page_type: 0xffffffff() [ 30.784535] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.785475] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c77d801 [ 30.786392] page dumped because: kasan: bad access detected [ 30.787054] [ 30.787272] Memory state around the buggy address: [ 30.787865] ffff88800f0f9800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.788720] ffff88800f0f9880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.789592] >ffff88800f0f9900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.790453] ^ [ 30.791242] ffff88800f0f9980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.792119] ffff88800f0f9a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.792990] ================================================================== [ 30.794258] Disabling lock debugging due to kernel taint [ 32.611425] BUG: Bad rss-counter state mm:000000007fc9bbe8 type:MM_FILEPAGES val:33 [ 32.612125] BUG: Bad rss-counter state mm:000000007fc9bbe8 type:MM_ANONPAGES val:22 [ 32.995365] BUG: Bad rss-counter state mm:000000009a5c9073 type:MM_FILEPAGES val:33 [ 32.996186] BUG: Bad rss-counter state mm:000000009a5c9073 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62046' (ECDSA) to the list of known hosts. 2023/06/20 12:39:49 fuzzer started 2023/06/20 12:39:49 dialing manager at localhost:36067 2023/06/20 12:39:49 checking machine... 2023/06/20 12:39:49 checking revisions... [ 33.616371] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:39:49 testing simple program... [ 33.668849] cgroup: Unknown subsys name 'net' [ 33.732522] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:39:49 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000062 RCX=ffffffff83723df5 RDX=ffff888015a53680 RSI=0000000000000063 RDI=0000000000000082 RBP=0000000000000063 RSP=ffff88800f65f7b8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=000000000000000a R13=ffffffff87f99df0 R14=0000000000000000 R15=0000000000000006 RIP=ffffffff814c0408 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 00007f6f823e7900 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=00007ffccd759ff8 CR3=000000000e884000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007f59d8918a20 CR3=000000000dbc8000 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=2039343a39333a3231203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039343a39333a3231203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000