syzkaller login: [ 109.695059] BUG: Bad rss-counter state mm:0000000061ab4b38 type:MM_FILEPAGES val:33 [ 109.696294] BUG: Bad rss-counter state mm:0000000061ab4b38 type:MM_ANONPAGES val:22 [ 109.851109] ================================================================== [ 109.852147] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 109.853219] Read of size 8 at addr ffff88800fb02ed8 by task sshd/220 [ 109.854173] [ 109.854384] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 109.855346] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 109.856271] Call Trace: [ 109.856573] [ 109.856843] dump_stack_lvl+0x91/0xf0 [ 109.857304] print_report+0xcc/0x620 [ 109.857762] ? __virt_addr_valid+0x102/0x340 [ 109.858291] ? vma_interval_tree_remove+0xc75/0xec0 [ 109.858875] ? vma_interval_tree_remove+0xc75/0xec0 [ 109.859460] kasan_report+0xbe/0xf0 [ 109.859913] ? vma_interval_tree_remove+0xc75/0xec0 [ 109.860498] vma_interval_tree_remove+0xc75/0xec0 [ 109.861066] vma_prepare+0xc54/0x11a0 [ 109.861519] __split_vma+0x5af/0x950 [ 109.861987] ? __pfx___split_vma+0x10/0x10 [ 109.862605] ? find_held_lock+0x2c/0x110 [ 109.863221] do_vmi_align_munmap+0x2ba/0x11f0 [ 109.863890] ? lock_is_held_type+0x9f/0x120 [ 109.864523] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 109.865238] ? mtree_range_walk+0x632/0x900 [ 109.865893] ? mas_walk+0x5c7/0x7c0 [ 109.866448] do_vmi_munmap+0x1f1/0x2b0 [ 109.867027] mmap_region+0x1f9/0x2660 [ 109.867595] ? vm_mmap_pgoff+0x15c/0x3a0 [ 109.868197] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 109.869041] ? __pfx_lock_acquire+0x10/0x10 [ 109.869673] ? __pfx_mmap_region+0x10/0x10 [ 109.870314] ? security_mmap_addr+0x7d/0xa0 [ 109.870941] ? get_unmapped_area+0x1f5/0x3f0 [ 109.871589] do_mmap+0x854/0xf00 [ 109.872100] vm_mmap_pgoff+0x1a6/0x3a0 [ 109.872683] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 109.873342] ksys_mmap_pgoff+0x3af/0x500 [ 109.873950] do_syscall_64+0x3f/0x90 [ 109.874512] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 109.875270] RIP: 0033:0x7fe28fad8d82 [ 109.875811] 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 [ 109.878343] RSP: 002b:00007ffd46dc6a68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 109.879413] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe28fad8d82 [ 109.880416] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe28ef12000 [ 109.881314] RBP: 00007fe28ef12000 R08: 0000000000000009 R09: 0000000000001000 [ 109.882230] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559c39b21ec0 [ 109.883120] R13: 00007ffd46dc6a80 R14: 00007ffd46dc6ab0 R15: 00007ffd46dc6e10 [ 109.884023] [ 109.884333] [ 109.884563] Allocated by task 213: [ 109.885018] kasan_save_stack+0x22/0x50 [ 109.885562] kasan_set_track+0x25/0x30 [ 109.886092] __kasan_slab_alloc+0x59/0x70 [ 109.886648] kmem_cache_alloc+0x16b/0x370 [ 109.887199] vm_area_dup+0x20/0x160 [ 109.887698] __split_vma+0x170/0x950 [ 109.888217] split_vma+0xc6/0x110 [ 109.888697] mprotect_fixup+0x8d2/0xb30 [ 109.889258] do_mprotect_pkey+0x87e/0xd40 [ 109.889822] __x64_sys_mprotect+0x78/0xc0 [ 109.890507] do_syscall_64+0x3f/0x90 [ 109.891101] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 109.891908] [ 109.892178] Freed by task 213: [ 109.892674] kasan_save_stack+0x22/0x50 [ 109.893307] kasan_set_track+0x25/0x30 [ 109.893945] kasan_save_free_info+0x2b/0x50 [ 109.894620] __kasan_slab_free+0x10a/0x190 [ 109.895293] kmem_cache_free+0x10d/0x4d0 [ 109.895931] rcu_core+0x8c8/0x2860 [ 109.896495] __do_softirq+0x1b7/0x7d4 [ 109.897099] [ 109.897372] Last potentially related work creation: [ 109.898123] kasan_save_stack+0x22/0x50 [ 109.898764] __kasan_record_aux_stack+0x8e/0xa0 [ 109.899491] __call_rcu_common.constprop.0+0x6a/0xb90 [ 109.900305] remove_vma+0x139/0x170 [ 109.900875] do_vmi_align_munmap+0xd4a/0x11f0 [ 109.901568] do_vmi_munmap+0x1f1/0x2b0 [ 109.902200] __vm_munmap+0x138/0x3a0 [ 109.902786] __x64_sys_munmap+0x59/0x80 [ 109.903410] do_syscall_64+0x3f/0x90 [ 109.904003] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 109.904806] [ 109.905075] The buggy address belongs to the object at ffff88800fb02e80 [ 109.905075] which belongs to the cache vm_area_struct of size 168 [ 109.906941] The buggy address is located 88 bytes inside of [ 109.906941] freed 168-byte region [ffff88800fb02e80, ffff88800fb02f28) [ 109.908699] [ 109.908967] The buggy address belongs to the physical page: [ 109.909802] page:00000000379990a2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfb02 [ 109.911178] memcg:ffff88800e7f4001 [ 109.911715] flags: 0x100000000000200(slab|node=0|zone=1) [ 109.912522] page_type: 0xffffffff() [ 109.913083] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 109.914256] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e7f4001 [ 109.915406] page dumped because: kasan: bad access detected [ 109.916246] [ 109.916514] Memory state around the buggy address: [ 109.917249] ffff88800fb02d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 109.918343] ffff88800fb02e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 109.919430] >ffff88800fb02e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 109.920509] ^ [ 109.921424] ffff88800fb02f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 109.922528] ffff88800fb02f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 109.923604] ================================================================== [ 109.924814] Disabling lock debugging due to kernel taint [ 111.807016] BUG: Bad rss-counter state mm:000000000a2a2d17 type:MM_FILEPAGES val:33 [ 111.807760] BUG: Bad rss-counter state mm:000000000a2a2d17 type:MM_ANONPAGES val:22 [ 112.217323] BUG: Bad rss-counter state mm:00000000259d4eba type:MM_FILEPAGES val:33 [ 112.218101] BUG: Bad rss-counter state mm:00000000259d4eba type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35432' (ECDSA) to the list of known hosts. 2023/06/19 15:53:13 fuzzer started 2023/06/19 15:53:14 dialing manager at localhost:44161 2023/06/19 15:53:14 checking machine... 2023/06/19 15:53:14 checking revisions... [ 112.928247] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:53:14 testing simple program... [ 112.978545] cgroup: Unknown subsys name 'net' [ 113.016588] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:51:54 Registers: info registers vcpu 0 RAX=00000000dead4ead RBX=ffff88800f462280 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff88800f462284 RBP=1ffff110033b2faf RSP=ffff888019d97d70 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88800f4621c0 R13=ffff88801638bf40 R14=0000000000000000 R15=0000000000000400 RIP=ffffffff812e004a 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 00007f9e77b64900 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=00007f9e7811b618 CR3=000000000dffa000 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=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 info registers vcpu 1 RAX=ffffffff8180f43b RBX=0000000000000002 RCX=ffffffff8613753e RDX=dffffc0000000000 RSI=ffff88806cf09dd0 RDI=1ffff1100d9e135a RBP=ffff88806cf09ad0 RSP=ffff88806cf09a08 R8 =ffffffff86137542 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=0000000000020d8a R12=ffff88806cf09ad8 R13=ffff88806cf09ac0 R14=ffff88806cf09dd8 R15=ffff88806cf09a78 RIP=ffffffff8113106f 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=00007fcb560bc0d0 CR3=0000000019e72000 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=2033313a33353a3531203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033313a33353a3531203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000