syzkaller login: [ 33.617793] BUG: Bad rss-counter state mm:00000000d7717155 type:MM_FILEPAGES val:33 [ 33.619183] BUG: Bad rss-counter state mm:00000000d7717155 type:MM_ANONPAGES val:22 [ 33.771257] ================================================================== [ 33.772183] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.773135] Read of size 8 at addr ffff88800c422228 by task sshd/219 [ 33.773931] [ 33.774149] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.775113] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.776090] Call Trace: [ 33.776411] [ 33.776706] dump_stack_lvl+0x91/0xf0 [ 33.777202] print_report+0xcc/0x620 [ 33.777712] ? __virt_addr_valid+0x102/0x340 [ 33.778265] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.778882] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.779499] kasan_report+0xbe/0xf0 [ 33.779986] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.780626] vma_interval_tree_remove+0xc75/0xec0 [ 33.781231] vma_prepare+0xc54/0x11a0 [ 33.781729] __split_vma+0x5af/0x950 [ 33.782198] ? __pfx___split_vma+0x10/0x10 [ 33.782730] ? find_held_lock+0x2c/0x110 [ 33.783251] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.783815] ? lock_is_held_type+0x9f/0x120 [ 33.784353] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.784953] ? mtree_range_walk+0x632/0x900 [ 33.785519] ? mas_walk+0x5c7/0x7c0 [ 33.785992] do_vmi_munmap+0x1f1/0x2b0 [ 33.786483] mmap_region+0x1f9/0x2660 [ 33.786968] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.787478] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.788186] ? __pfx_lock_acquire+0x10/0x10 [ 33.788753] ? __pfx_mmap_region+0x10/0x10 [ 33.789295] ? security_mmap_addr+0x7d/0xa0 [ 33.789830] ? get_unmapped_area+0x1f5/0x3f0 [ 33.790397] do_mmap+0x854/0xf00 [ 33.790842] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.791352] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.791934] ksys_mmap_pgoff+0x3af/0x500 [ 33.792450] do_syscall_64+0x3f/0x90 [ 33.792932] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.793621] RIP: 0033:0x7f7017053d82 [ 33.794097] 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 [ 33.796316] RSP: 002b:00007ffeefa77dd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.797245] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7017053d82 [ 33.798135] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f701648d000 [ 33.799012] RBP: 00007f701648d000 R08: 0000000000000009 R09: 0000000000001000 [ 33.799887] R10: 0000000000000812 R11: 0000000000000206 R12: 00005617f3708f70 [ 33.800751] R13: 00007ffeefa77df0 R14: 00007ffeefa77e20 R15: 00007ffeefa78180 [ 33.801649] [ 33.801958] [ 33.802184] Allocated by task 211: [ 33.802634] kasan_save_stack+0x22/0x50 [ 33.803157] kasan_set_track+0x25/0x30 [ 33.803667] __kasan_slab_alloc+0x59/0x70 [ 33.804208] kmem_cache_alloc+0x16b/0x370 [ 33.804744] vm_area_dup+0x20/0x160 [ 33.805216] __split_vma+0x170/0x950 [ 33.805717] split_vma+0xc6/0x110 [ 33.806167] mprotect_fixup+0x8d2/0xb30 [ 33.806691] do_mprotect_pkey+0x87e/0xd40 [ 33.807227] __x64_sys_mprotect+0x78/0xc0 [ 33.807764] do_syscall_64+0x3f/0x90 [ 33.808245] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.808912] [ 33.809133] Freed by task 211: [ 33.809552] kasan_save_stack+0x22/0x50 [ 33.810059] kasan_set_track+0x25/0x30 [ 33.810572] kasan_save_free_info+0x2b/0x50 [ 33.811117] __kasan_slab_free+0x10a/0x190 [ 33.811669] kmem_cache_free+0x10d/0x4d0 [ 33.812190] rcu_core+0x8c8/0x2860 [ 33.812649] __do_softirq+0x1b7/0x7d4 [ 33.813168] [ 33.813406] Last potentially related work creation: [ 33.814013] kasan_save_stack+0x22/0x50 [ 33.814538] __kasan_record_aux_stack+0x8e/0xa0 [ 33.815125] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.815792] remove_vma+0x139/0x170 [ 33.816261] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.816840] do_vmi_munmap+0x1f1/0x2b0 [ 33.817335] __vm_munmap+0x138/0x3a0 [ 33.817832] __x64_sys_munmap+0x59/0x80 [ 33.818344] do_syscall_64+0x3f/0x90 [ 33.818827] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.819493] [ 33.819715] The buggy address belongs to the object at ffff88800c4221d0 [ 33.819715] which belongs to the cache vm_area_struct of size 168 [ 33.821223] The buggy address is located 88 bytes inside of [ 33.821223] freed 168-byte region [ffff88800c4221d0, ffff88800c422278) [ 33.822670] [ 33.822882] The buggy address belongs to the physical page: [ 33.823549] page:0000000086e0f807 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc422 [ 33.824645] memcg:ffff88800d8ca401 [ 33.825072] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.825740] page_type: 0xffffffff() [ 33.826201] raw: 0100000000000200 ffff88800879fc80 ffffea0000396140 dead000000000004 [ 33.827137] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d8ca401 [ 33.828051] page dumped because: kasan: bad access detected [ 33.828721] [ 33.828934] Memory state around the buggy address: [ 33.829533] ffff88800c422100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.830398] ffff88800c422180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 33.831283] >ffff88800c422200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 33.832142] ^ [ 33.832699] ffff88800c422280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 33.833569] ffff88800c422300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 33.834419] ================================================================== [ 33.835439] Disabling lock debugging due to kernel taint [ 36.215388] BUG: Bad rss-counter state mm:0000000027c274b1 type:MM_FILEPAGES val:33 [ 36.216642] BUG: Bad rss-counter state mm:0000000027c274b1 type:MM_ANONPAGES val:22 [ 36.789236] BUG: Bad rss-counter state mm:000000000ec6469b type:MM_FILEPAGES val:33 [ 36.790393] BUG: Bad rss-counter state mm:000000000ec6469b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22986' (ECDSA) to the list of known hosts. 2023/06/20 07:18:10 fuzzer started 2023/06/20 07:18:10 dialing manager at localhost:44161 2023/06/20 07:18:10 checking machine... 2023/06/20 07:18:10 checking revisions... [ 37.457501] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:18:10 testing simple program... [ 37.509724] cgroup: Unknown subsys name 'net' [ 37.567942] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:18:05 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007f51d5c47010 CR3=00000000097f0000 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=9b3c82266f9bf998174cca16966731da XMM02=2c67c8bc2e329bc3000000000011d2c0 XMM03=fb795ef6d65770560000000000124610 XMM04=56aef14a76c941cf00000000000ae988 XMM05=9834df1fdc19ea2c0000000000135778 XMM06=806171799158d9670000000000134818 XMM07=e042d86d42eb936e0000000000124890 XMM08=6f35eaaf5859d0a4000000000011d320 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000557840006d00 RCX=000000000000000a RDX=0000000000000001 RSI=0000557840015df2 RDI=0000557840006de0 RBP=00007ffc6bd47120 RSP=00007ffc6bd470c0 R8 =0000557840015df2 R9 =00007fa1c719ebe0 R10=0000000000000100 R11=0000000000000246 R12=0000000000000001 R13=0000557840015df2 R14=0000000000000001 R15=0000000000000000 RIP=00007fa1c7055867 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fa1c6bec900 00000000 00000000 GS =0000 0000000000000000 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=00007ffc6bd41000 CR3=000000000d92a000 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=0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a XMM01=00000000000000000000000000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=2042414e455f5350554f524752455355 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00ffffffffffffffffffffffffffffff XMM08=00202020200020202020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000