syzkaller login: [ 30.510291] BUG: Bad rss-counter state mm:00000000b68f911e type:MM_FILEPAGES val:33 [ 30.511544] BUG: Bad rss-counter state mm:00000000b68f911e type:MM_ANONPAGES val:22 [ 30.554716] ================================================================== [ 30.555797] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.556927] Read of size 8 at addr ffff8880180f1140 by task sshd/221 [ 30.557754] [ 30.557986] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.558934] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.559931] Call Trace: [ 30.560313] [ 30.560669] dump_stack_lvl+0x91/0xf0 [ 30.561313] print_report+0xcc/0x620 [ 30.561809] ? __virt_addr_valid+0x102/0x340 [ 30.562377] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.563006] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.563622] kasan_report+0xbe/0xf0 [ 30.564110] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.564741] vma_interval_tree_remove+0xc75/0xec0 [ 30.565355] vma_prepare+0xc54/0x11a0 [ 30.565834] __split_vma+0x5af/0x950 [ 30.566328] ? __pfx___split_vma+0x10/0x10 [ 30.566856] ? find_held_lock+0x2c/0x110 [ 30.567394] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.567954] ? lock_is_held_type+0x9f/0x120 [ 30.568507] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.569113] ? mtree_range_walk+0x632/0x900 [ 30.569669] ? mas_walk+0x5c7/0x7c0 [ 30.570160] do_vmi_munmap+0x1f1/0x2b0 [ 30.570663] mmap_region+0x1f9/0x2660 [ 30.571155] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.571680] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.572403] ? __pfx_lock_acquire+0x10/0x10 [ 30.572942] ? __pfx_mmap_region+0x10/0x10 [ 30.573482] ? security_mmap_addr+0x7d/0xa0 [ 30.574051] ? get_unmapped_area+0x1f5/0x3f0 [ 30.574604] do_mmap+0x854/0xf00 [ 30.575056] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.575555] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.576123] ksys_mmap_pgoff+0x3af/0x500 [ 30.576629] do_syscall_64+0x3f/0x90 [ 30.577112] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.577764] RIP: 0033:0x7f397df28d82 [ 30.578235] 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 [ 30.580362] RSP: 002b:00007ffea3bdd9b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.581264] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f397df28d82 [ 30.582129] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f397d362000 [ 30.582985] RBP: 00007f397d362000 R08: 0000000000000009 R09: 0000000000001000 [ 30.583825] R10: 0000000000000812 R11: 0000000000000206 R12: 00005572e990cb20 [ 30.584668] R13: 00007ffea3bdd9d0 R14: 00007ffea3bdda00 R15: 00007ffea3bddd60 [ 30.585531] [ 30.585821] [ 30.586060] Allocated by task 214: [ 30.586485] kasan_save_stack+0x22/0x50 [ 30.586990] kasan_set_track+0x25/0x30 [ 30.587493] __kasan_slab_alloc+0x59/0x70 [ 30.588016] kmem_cache_alloc+0x16b/0x370 [ 30.588555] vm_area_dup+0x20/0x160 [ 30.589024] __split_vma+0x170/0x950 [ 30.589494] split_vma+0xc6/0x110 [ 30.589952] mprotect_fixup+0x8d2/0xb30 [ 30.590469] do_mprotect_pkey+0x87e/0xd40 [ 30.591002] __x64_sys_mprotect+0x78/0xc0 [ 30.591524] do_syscall_64+0x3f/0x90 [ 30.592011] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.592670] [ 30.592890] Freed by task 214: [ 30.593289] kasan_save_stack+0x22/0x50 [ 30.593791] kasan_set_track+0x25/0x30 [ 30.594307] kasan_save_free_info+0x2b/0x50 [ 30.594850] __kasan_slab_free+0x10a/0x190 [ 30.595382] kmem_cache_free+0x10d/0x4d0 [ 30.595906] rcu_core+0x8c8/0x2860 [ 30.596413] __do_softirq+0x1b7/0x7d4 [ 30.596906] [ 30.597128] Last potentially related work creation: [ 30.597719] kasan_save_stack+0x22/0x50 [ 30.598253] __kasan_record_aux_stack+0x8e/0xa0 [ 30.598823] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.599467] remove_vma+0x139/0x170 [ 30.599928] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.600488] do_vmi_munmap+0x1f1/0x2b0 [ 30.600982] __vm_munmap+0x138/0x3a0 [ 30.601449] __x64_sys_munmap+0x59/0x80 [ 30.601956] do_syscall_64+0x3f/0x90 [ 30.602436] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.603088] [ 30.603305] The buggy address belongs to the object at ffff8880180f10e8 [ 30.603305] which belongs to the cache vm_area_struct of size 168 [ 30.604793] The buggy address is located 88 bytes inside of [ 30.604793] freed 168-byte region [ffff8880180f10e8, ffff8880180f1190) [ 30.606254] [ 30.606473] The buggy address belongs to the physical page: [ 30.607139] page:00000000eac4a3f2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x180f1 [ 30.608252] memcg:ffff88800f2c2601 [ 30.608682] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.609341] page_type: 0xffffffff() [ 30.609798] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.610729] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f2c2601 [ 30.611641] page dumped because: kasan: bad access detected [ 30.612311] [ 30.612530] Memory state around the buggy address: [ 30.613117] ffff8880180f1000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.614027] ffff8880180f1080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.614899] >ffff8880180f1100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.615758] ^ [ 30.616408] ffff8880180f1180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.617261] ffff8880180f1200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.618152] ================================================================== [ 30.619086] Disabling lock debugging due to kernel taint [ 32.385963] BUG: Bad rss-counter state mm:00000000dd4e761c type:MM_FILEPAGES val:33 [ 32.387144] BUG: Bad rss-counter state mm:00000000dd4e761c type:MM_ANONPAGES val:22 [ 32.833767] BUG: Bad rss-counter state mm:0000000049e6314e type:MM_FILEPAGES val:33 [ 32.834570] BUG: Bad rss-counter state mm:0000000049e6314e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20826' (ECDSA) to the list of known hosts. 2023/06/21 07:03:30 fuzzer started 2023/06/21 07:03:30 dialing manager at localhost:36067 2023/06/21 07:03:30 checking machine... 2023/06/21 07:03:30 checking revisions... [ 33.598677] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:03:30 testing simple program... [ 33.650513] cgroup: Unknown subsys name 'net' [ 33.704559] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:03:30 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff81894209 RDI=ffff88800d83f21c RBP=ffff88800c188c98 RSP=ffff888015d4f900 R8 =0000000000000005 R9 =00000000ffffffff R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000081 R13=ffffffff856f0da0 R14=ffff88800c188cc0 R15=0000000000000000 RIP=ffffffff81894264 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 00007f5269e51900 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=00007f526a406650 CR3=0000000016536000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007f8409f39a00 CR3=000000000d4f8000 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=2030333a33303a3730203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a33303a3730203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000