syzkaller login: [ 30.326652] BUG: Bad rss-counter state mm:00000000def26f24 type:MM_FILEPAGES val:33 [ 30.327931] BUG: Bad rss-counter state mm:00000000def26f24 type:MM_ANONPAGES val:22 [ 30.482104] ================================================================== [ 30.483032] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.483974] Read of size 8 at addr ffff88800e73ec20 by task sshd/221 [ 30.484746] [ 30.485036] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.485911] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.486947] Call Trace: [ 30.487295] [ 30.487597] dump_stack_lvl+0x91/0xf0 [ 30.488092] print_report+0xcc/0x620 [ 30.488589] ? __virt_addr_valid+0x102/0x340 [ 30.489149] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.489767] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.490389] kasan_report+0xbe/0xf0 [ 30.490874] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.491502] vma_interval_tree_remove+0xc75/0xec0 [ 30.492097] vma_prepare+0xc54/0x11a0 [ 30.492583] __split_vma+0x5af/0x950 [ 30.493058] ? __pfx___split_vma+0x10/0x10 [ 30.493592] ? find_held_lock+0x2c/0x110 [ 30.494116] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.494695] ? lock_is_held_type+0x9f/0x120 [ 30.495232] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.495832] ? mtree_range_walk+0x632/0x900 [ 30.496386] ? mas_walk+0x5c7/0x7c0 [ 30.496860] do_vmi_munmap+0x1f1/0x2b0 [ 30.497351] mmap_region+0x1f9/0x2660 [ 30.497832] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.498355] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.499089] ? __pfx_lock_acquire+0x10/0x10 [ 30.499621] ? __pfx_mmap_region+0x10/0x10 [ 30.500162] ? security_mmap_addr+0x7d/0xa0 [ 30.500692] ? get_unmapped_area+0x1f5/0x3f0 [ 30.501243] do_mmap+0x854/0xf00 [ 30.501682] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.502180] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.502753] ksys_mmap_pgoff+0x3af/0x500 [ 30.503261] do_syscall_64+0x3f/0x90 [ 30.503742] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.504427] RIP: 0033:0x7f64cdfb1d82 [ 30.504891] 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 [ 30.507120] RSP: 002b:00007fffc48801b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.508071] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f64cdfb1d82 [ 30.508958] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f64cd3eb000 [ 30.509843] RBP: 00007f64cd3eb000 R08: 0000000000000009 R09: 0000000000001000 [ 30.510745] R10: 0000000000000812 R11: 0000000000000206 R12: 000055787eb2bec0 [ 30.511624] R13: 00007fffc48801d0 R14: 00007fffc4880200 R15: 00007fffc4880560 [ 30.512488] [ 30.512781] [ 30.512998] Allocated by task 214: [ 30.513421] kasan_save_stack+0x22/0x50 [ 30.513927] kasan_set_track+0x25/0x30 [ 30.514425] __kasan_slab_alloc+0x59/0x70 [ 30.514959] kmem_cache_alloc+0x16b/0x370 [ 30.515486] vm_area_dup+0x20/0x160 [ 30.515952] __split_vma+0x170/0x950 [ 30.516417] split_vma+0xc6/0x110 [ 30.516862] mprotect_fixup+0x8d2/0xb30 [ 30.517365] do_mprotect_pkey+0x87e/0xd40 [ 30.517886] __x64_sys_mprotect+0x78/0xc0 [ 30.518412] do_syscall_64+0x3f/0x90 [ 30.518906] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.519550] [ 30.519775] Freed by task 214: [ 30.520168] kasan_save_stack+0x22/0x50 [ 30.520669] kasan_set_track+0x25/0x30 [ 30.521160] kasan_save_free_info+0x2b/0x50 [ 30.521691] __kasan_slab_free+0x10a/0x190 [ 30.522228] kmem_cache_free+0x10d/0x4d0 [ 30.522749] rcu_core+0x8c8/0x2860 [ 30.523193] __do_softirq+0x1b7/0x7d4 [ 30.523681] [ 30.523898] Last potentially related work creation: [ 30.524480] kasan_save_stack+0x22/0x50 [ 30.524990] __kasan_record_aux_stack+0x8e/0xa0 [ 30.525568] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.526213] remove_vma+0x139/0x170 [ 30.526686] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.527252] do_vmi_munmap+0x1f1/0x2b0 [ 30.527745] __vm_munmap+0x138/0x3a0 [ 30.528216] __x64_sys_munmap+0x59/0x80 [ 30.528718] do_syscall_64+0x3f/0x90 [ 30.529198] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.529845] [ 30.530062] Second to last potentially related work creation: [ 30.530763] kasan_save_stack+0x22/0x50 [ 30.531277] __kasan_record_aux_stack+0x8e/0xa0 [ 30.531863] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.532508] remove_vma+0x139/0x170 [ 30.532965] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.533534] do_vmi_munmap+0x1f1/0x2b0 [ 30.534033] mmap_region+0x1f9/0x2660 [ 30.534530] do_mmap+0x854/0xf00 [ 30.534970] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.535466] ksys_mmap_pgoff+0x7d/0x500 [ 30.535965] do_syscall_64+0x3f/0x90 [ 30.536454] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.537110] [ 30.537329] The buggy address belongs to the object at ffff88800e73ebc8 [ 30.537329] which belongs to the cache vm_area_struct of size 168 [ 30.538820] The buggy address is located 88 bytes inside of [ 30.538820] freed 168-byte region [ffff88800e73ebc8, ffff88800e73ec70) [ 30.540249] [ 30.540467] The buggy address belongs to the physical page: [ 30.541134] page:00000000347695bb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe73e [ 30.542228] memcg:ffff88800cf42301 [ 30.542688] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.543404] page_type: 0xffffffff() [ 30.543860] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 30.544797] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cf42301 [ 30.545720] page dumped because: kasan: bad access detected [ 30.546397] [ 30.546625] Memory state around the buggy address: [ 30.547211] ffff88800e73eb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.548078] ffff88800e73eb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.548968] >ffff88800e73ec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.549827] ^ [ 30.550361] ffff88800e73ec80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.551236] ffff88800e73ed00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.552100] ================================================================== [ 30.553397] Disabling lock debugging due to kernel taint [ 33.417485] BUG: Bad rss-counter state mm:000000005282b485 type:MM_FILEPAGES val:33 [ 33.418477] BUG: Bad rss-counter state mm:000000005282b485 type:MM_ANONPAGES val:22 [ 33.976933] BUG: Bad rss-counter state mm:00000000bf7d2bc4 type:MM_FILEPAGES val:33 [ 33.978095] BUG: Bad rss-counter state mm:00000000bf7d2bc4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28671' (ECDSA) to the list of known hosts. 2023/06/20 17:37:09 fuzzer started 2023/06/20 17:37:09 dialing manager at localhost:36067 2023/06/20 17:37:09 checking machine... 2023/06/20 17:37:09 checking revisions... [ 34.619691] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:37:09 testing simple program... [ 34.666785] cgroup: Unknown subsys name 'net' [ 34.728162] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:37:08 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8453684b RDX=fffffbfff0adb095 RSI=0000000000000004 RDI=ffffffff856d84a0 RBP=ffffffff856d84a0 RSP=ffff88806ce09c70 R8 =0000000000000000 R9 =fffffbfff0adb094 R10=ffffffff856d84a3 R11=0000000000000000 R12=0000000000000003 R13=fffffbfff0adb094 R14=0000000000000001 R15=1ffff1100d9c138f RIP=ffffffff845368c8 RFL=00000002 [-------] 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 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=00007ffc3f975f08 CR3=0000000019dca000 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=2038303a37333a3731203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038303a37333a3731203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888016c851c0 RSI=ffffffff818a82be RDI=0000000000000005 RBP=0000000000000000 RSP=ffff8880147c7b08 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff8880147c7c48 R13=ffff8880147c7df0 R14=0000000000000001 R15=ffff8880147c7df0 RIP=ffffffff814c089b 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 00007fccea74f900 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=00007f5952b6e650 CR3=000000000d75e000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=a83dc7b945a3e65d00000000000ae988 XMM05=cee9fa5f04c4271900000000001344c0 XMM06=c291bd5c70af25b900000000001332b0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000