syzkaller login: [ 38.539292] BUG: Bad rss-counter state mm:0000000082829e60 type:MM_FILEPAGES val:33 [ 38.541701] BUG: Bad rss-counter state mm:0000000082829e60 type:MM_ANONPAGES val:22 [ 38.731015] ================================================================== [ 38.731978] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.732932] Read of size 8 at addr ffff88800e52b880 by task sshd/218 [ 38.733731] [ 38.733988] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.734964] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.735963] Call Trace: [ 38.736295] [ 38.736596] dump_stack_lvl+0x91/0xf0 [ 38.737094] print_report+0xcc/0x620 [ 38.737623] ? __virt_addr_valid+0x102/0x340 [ 38.738175] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.738826] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.739471] kasan_report+0xbe/0xf0 [ 38.739953] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.740584] vma_interval_tree_remove+0xc75/0xec0 [ 38.741207] vma_prepare+0xc54/0x11a0 [ 38.741717] __split_vma+0x5af/0x950 [ 38.742203] ? __pfx___split_vma+0x10/0x10 [ 38.742763] ? find_held_lock+0x2c/0x110 [ 38.743316] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.743881] ? lock_is_held_type+0x9f/0x120 [ 38.744443] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.745064] ? mtree_range_walk+0x632/0x900 [ 38.745655] ? mas_walk+0x5c7/0x7c0 [ 38.746129] do_vmi_munmap+0x1f1/0x2b0 [ 38.746640] mmap_region+0x1f9/0x2660 [ 38.747125] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.747654] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.748391] ? __pfx_lock_acquire+0x10/0x10 [ 38.748922] ? __pfx_mmap_region+0x10/0x10 [ 38.749485] ? security_mmap_addr+0x7d/0xa0 [ 38.750018] ? get_unmapped_area+0x1f5/0x3f0 [ 38.750601] do_mmap+0x854/0xf00 [ 38.751050] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.751567] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.752126] ksys_mmap_pgoff+0x3af/0x500 [ 38.752649] do_syscall_64+0x3f/0x90 [ 38.753132] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.753805] RIP: 0033:0x7f5a47571d82 [ 38.754293] 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 [ 38.756449] RSP: 002b:00007ffe273544c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.757388] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5a47571d82 [ 38.758252] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5a469ab000 [ 38.759123] RBP: 00007f5a469ab000 R08: 0000000000000009 R09: 0000000000001000 [ 38.759986] R10: 0000000000000812 R11: 0000000000000206 R12: 000056230135aec0 [ 38.760839] R13: 00007ffe273544e0 R14: 00007ffe27354510 R15: 00007ffe27354870 [ 38.761719] [ 38.762012] [ 38.762241] Allocated by task 211: [ 38.762687] kasan_save_stack+0x22/0x50 [ 38.763197] kasan_set_track+0x25/0x30 [ 38.763703] __kasan_slab_alloc+0x59/0x70 [ 38.764251] kmem_cache_alloc+0x16b/0x370 [ 38.764843] vm_area_dup+0x20/0x160 [ 38.765379] __split_vma+0x170/0x950 [ 38.765855] split_vma+0xc6/0x110 [ 38.766331] mprotect_fixup+0x8d2/0xb30 [ 38.766838] do_mprotect_pkey+0x87e/0xd40 [ 38.767375] __x64_sys_mprotect+0x78/0xc0 [ 38.767905] do_syscall_64+0x3f/0x90 [ 38.768396] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.769039] [ 38.769274] Freed by task 211: [ 38.769689] kasan_save_stack+0x22/0x50 [ 38.770199] kasan_set_track+0x25/0x30 [ 38.770713] kasan_save_free_info+0x2b/0x50 [ 38.771271] __kasan_slab_free+0x10a/0x190 [ 38.771804] kmem_cache_free+0x10d/0x4d0 [ 38.772326] rcu_core+0x8c8/0x2860 [ 38.772770] __do_softirq+0x1b7/0x7d4 [ 38.773260] [ 38.773500] Last potentially related work creation: [ 38.774090] kasan_save_stack+0x22/0x50 [ 38.774619] __kasan_record_aux_stack+0x8e/0xa0 [ 38.775195] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.775849] remove_vma+0x139/0x170 [ 38.776349] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.776921] do_vmi_munmap+0x1f1/0x2b0 [ 38.777450] __vm_munmap+0x138/0x3a0 [ 38.777929] __x64_sys_munmap+0x59/0x80 [ 38.778455] do_syscall_64+0x3f/0x90 [ 38.778938] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.779600] [ 38.779818] The buggy address belongs to the object at ffff88800e52b828 [ 38.779818] which belongs to the cache vm_area_struct of size 168 [ 38.781331] The buggy address is located 88 bytes inside of [ 38.781331] freed 168-byte region [ffff88800e52b828, ffff88800e52b8d0) [ 38.782783] [ 38.783002] The buggy address belongs to the physical page: [ 38.783677] page:00000000d403666f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe52b [ 38.784792] memcg:ffff88800e2a1401 [ 38.785230] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.785929] page_type: 0xffffffff() [ 38.786429] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a6dc0 dead000000000002 [ 38.787369] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e2a1401 [ 38.788284] page dumped because: kasan: bad access detected [ 38.788939] [ 38.789154] Memory state around the buggy address: [ 38.789913] ffff88800e52b780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.790794] ffff88800e52b800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.791664] >ffff88800e52b880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.792528] ^ [ 38.792947] ffff88800e52b900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.793841] ffff88800e52b980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 38.794710] ================================================================== [ 38.795853] Disabling lock debugging due to kernel taint [ 40.913153] BUG: Bad rss-counter state mm:00000000ec4b8802 type:MM_FILEPAGES val:33 [ 40.914332] BUG: Bad rss-counter state mm:00000000ec4b8802 type:MM_ANONPAGES val:22 [ 41.385638] BUG: Bad rss-counter state mm:00000000aec39a31 type:MM_FILEPAGES val:33 [ 41.386879] BUG: Bad rss-counter state mm:00000000aec39a31 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8965' (ECDSA) to the list of known hosts. 2023/06/21 00:10:42 fuzzer started 2023/06/21 00:10:42 dialing manager at localhost:36067 2023/06/21 00:10:42 checking machine... 2023/06/21 00:10:42 checking revisions... [ 42.064976] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:10:42 testing simple program... [ 42.113910] cgroup: Unknown subsys name 'net' [ 42.171681] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:10:42 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800e7660c0 RCX=0000000000000000 RDX=ffff88800fcbd1c0 RSI=ffffffff8199bc33 RDI=0000000000000005 RBP=ffff88800e758070 RSP=ffff888016a8f938 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000001 R12=ffff88800c48bc00 R13=0000000000000001 R14=0000000000000000 R15=ffff88800c48bd40 RIP=ffffffff814c089b RFL=00000046 [---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 00007fcd3ff17900 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=00005571dd34b748 CR3=0000000017530000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 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=00007ffdaf017df8 CR3=0000000005482000 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=00007fbd88de15100000558cb0e53790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000