syzkaller login: [ 40.830938] BUG: Bad rss-counter state mm:0000000074fb9e1c type:MM_FILEPAGES val:33 [ 40.832220] BUG: Bad rss-counter state mm:0000000074fb9e1c type:MM_ANONPAGES val:22 [ 40.998720] ================================================================== [ 40.999675] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.000676] Read of size 8 at addr ffff888019f45ed8 by task sshd/218 [ 41.001605] [ 41.001835] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.002753] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.003805] Call Trace: [ 41.004142] [ 41.004441] dump_stack_lvl+0x91/0xf0 [ 41.004964] print_report+0xcc/0x620 [ 41.005478] ? __virt_addr_valid+0x102/0x340 [ 41.006068] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.006718] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.007366] kasan_report+0xbe/0xf0 [ 41.007866] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.008542] vma_interval_tree_remove+0xc75/0xec0 [ 41.009188] vma_prepare+0xc54/0x11a0 [ 41.009701] __split_vma+0x5af/0x950 [ 41.010214] ? __pfx___split_vma+0x10/0x10 [ 41.010784] ? find_held_lock+0x2c/0x110 [ 41.011355] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.011962] ? lock_is_held_type+0x9f/0x120 [ 41.012536] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.013205] ? mtree_range_walk+0x632/0x900 [ 41.013796] ? mas_walk+0x5c7/0x7c0 [ 41.014310] do_vmi_munmap+0x1f1/0x2b0 [ 41.014836] mmap_region+0x1f9/0x2660 [ 41.015351] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.015907] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.016665] ? __pfx_lock_acquire+0x10/0x10 [ 41.017246] ? __pfx_mmap_region+0x10/0x10 [ 41.017807] ? security_mmap_addr+0x7d/0xa0 [ 41.018363] ? get_unmapped_area+0x1f5/0x3f0 [ 41.018982] do_mmap+0x854/0xf00 [ 41.019458] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.019992] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.020591] ksys_mmap_pgoff+0x3af/0x500 [ 41.021153] do_syscall_64+0x3f/0x90 [ 41.021663] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.022342] RIP: 0033:0x7f280a540d82 [ 41.022827] 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 [ 41.025098] RSP: 002b:00007ffe45d000b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.026078] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f280a540d82 [ 41.026995] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f280997a000 [ 41.027918] RBP: 00007f280997a000 R08: 0000000000000009 R09: 0000000000001000 [ 41.028844] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e0784ffec0 [ 41.029754] R13: 00007ffe45d000d0 R14: 00007ffe45d00100 R15: 00007ffe45d00460 [ 41.030675] [ 41.030991] [ 41.031224] Allocated by task 211: [ 41.031689] kasan_save_stack+0x22/0x50 [ 41.032236] kasan_set_track+0x25/0x30 [ 41.032767] __kasan_slab_alloc+0x59/0x70 [ 41.033345] kmem_cache_alloc+0x16b/0x370 [ 41.033899] vm_area_dup+0x20/0x160 [ 41.034385] __split_vma+0x170/0x950 [ 41.034886] split_vma+0xc6/0x110 [ 41.035354] mprotect_fixup+0x8d2/0xb30 [ 41.035898] do_mprotect_pkey+0x87e/0xd40 [ 41.036458] __x64_sys_mprotect+0x78/0xc0 [ 41.037028] do_syscall_64+0x3f/0x90 [ 41.037538] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.038228] [ 41.038458] Freed by task 211: [ 41.038880] kasan_save_stack+0x22/0x50 [ 41.039416] kasan_set_track+0x25/0x30 [ 41.039943] kasan_save_free_info+0x2b/0x50 [ 41.040508] __kasan_slab_free+0x10a/0x190 [ 41.041096] kmem_cache_free+0x10d/0x4d0 [ 41.041644] rcu_core+0x8c8/0x2860 [ 41.042113] __do_softirq+0x1b7/0x7d4 [ 41.042621] [ 41.042850] Last potentially related work creation: [ 41.043476] kasan_save_stack+0x22/0x50 [ 41.044016] __kasan_record_aux_stack+0x8e/0xa0 [ 41.044637] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.045343] remove_vma+0x139/0x170 [ 41.045826] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.046425] do_vmi_munmap+0x1f1/0x2b0 [ 41.046949] __vm_munmap+0x138/0x3a0 [ 41.047451] __x64_sys_munmap+0x59/0x80 [ 41.047982] do_syscall_64+0x3f/0x90 [ 41.048494] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.049190] [ 41.049416] The buggy address belongs to the object at ffff888019f45e80 [ 41.049416] which belongs to the cache vm_area_struct of size 168 [ 41.051000] The buggy address is located 88 bytes inside of [ 41.051000] freed 168-byte region [ffff888019f45e80, ffff888019f45f28) [ 41.052500] [ 41.052730] The buggy address belongs to the physical page: [ 41.053449] page:00000000dcddf220 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f45 [ 41.054633] memcg:ffff88800ed92701 [ 41.055098] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.055788] page_type: 0xffffffff() [ 41.056270] raw: 0100000000000200 ffff88800879fc80 ffffea00005ab540 dead000000000004 [ 41.057270] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed92701 [ 41.058251] page dumped because: kasan: bad access detected [ 41.058964] [ 41.059199] Memory state around the buggy address: [ 41.059820] ffff888019f45d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.060731] ffff888019f45e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 41.061607] >ffff888019f45e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.062461] ^ [ 41.063197] ffff888019f45f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 41.064051] ffff888019f45f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 41.064910] ================================================================== [ 41.066178] Disabling lock debugging due to kernel taint [ 43.129327] BUG: Bad rss-counter state mm:000000002168e172 type:MM_FILEPAGES val:33 [ 43.130220] BUG: Bad rss-counter state mm:000000002168e172 type:MM_ANONPAGES val:22 [ 43.692287] BUG: Bad rss-counter state mm:000000005c9692d3 type:MM_FILEPAGES val:33 [ 43.693474] BUG: Bad rss-counter state mm:000000005c9692d3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14579' (ECDSA) to the list of known hosts. 2023/06/19 14:04:56 fuzzer started 2023/06/19 14:04:56 dialing manager at localhost:44161 2023/06/19 14:04:56 checking machine... 2023/06/19 14:04:56 checking revisions... [ 44.335943] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:04:56 testing simple program... [ 44.388558] cgroup: Unknown subsys name 'net' [ 44.425786] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:04:50 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888015ec1988 RCX=0000000000000000 RDX=00000000ffffffff RSI=0000000000000008 RDI=ffff888015ec198c RBP=1ffff11002ca7f37 RSP=ffff88801653f9b0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000001 R12=ffff888015ec1990 R13=ffff888015ec1998 R14=ffff88801653fc80 R15=ffff88801653fc48 RIP=ffffffff812e00b9 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 00007f236e00e900 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=00007f236e5c60b0 CR3=000000000c706000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f28f5057f90 CR3=000000000c6c4000 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=01363998685214b97d430e2b56aa107c XMM02=2c67c8bc2e329bc3000000000011e238 XMM03=fb795ef6d65770560000000000124460 XMM04=5b2229e1b746cd1a00000000000ae988 XMM05=dfcdbad4f1609c370000000000133d38 XMM06=fcb0cabb61e51e3d0000000000132f10 XMM07=e042d86d42eb936e0000000000124738 XMM08=afbd644ada6751fd000000000011e298 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000