syzkaller login: [ 38.276277] BUG: Bad rss-counter state mm:000000003e83f828 type:MM_FILEPAGES val:33 [ 38.277542] BUG: Bad rss-counter state mm:000000003e83f828 type:MM_ANONPAGES val:22 [ 38.456074] ================================================================== [ 38.457171] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.458329] Read of size 8 at addr ffff88801a01e798 by task sshd/221 [ 38.459336] [ 38.459594] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.460644] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.461800] Call Trace: [ 38.462139] [ 38.462442] dump_stack_lvl+0x91/0xf0 [ 38.462972] print_report+0xcc/0x620 [ 38.463498] ? __virt_addr_valid+0x102/0x340 [ 38.464085] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.464754] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.465411] kasan_report+0xbe/0xf0 [ 38.465919] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.466579] vma_interval_tree_remove+0xc75/0xec0 [ 38.467232] vma_prepare+0xc54/0x11a0 [ 38.467750] __split_vma+0x5af/0x950 [ 38.468271] ? __pfx___split_vma+0x10/0x10 [ 38.468857] ? find_held_lock+0x2c/0x110 [ 38.469434] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.470065] ? lock_is_held_type+0x9f/0x120 [ 38.470662] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.471352] ? mtree_range_walk+0x632/0x900 [ 38.471967] ? mas_walk+0x5c7/0x7c0 [ 38.472499] do_vmi_munmap+0x1f1/0x2b0 [ 38.473047] mmap_region+0x1f9/0x2660 [ 38.473587] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.474152] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.474940] ? __pfx_lock_acquire+0x10/0x10 [ 38.475533] ? __pfx_mmap_region+0x10/0x10 [ 38.476118] ? security_mmap_addr+0x7d/0xa0 [ 38.476707] ? get_unmapped_area+0x1f5/0x3f0 [ 38.477319] do_mmap+0x854/0xf00 [ 38.477799] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.478355] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.478978] ksys_mmap_pgoff+0x3af/0x500 [ 38.479556] do_syscall_64+0x3f/0x90 [ 38.480084] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.480797] RIP: 0033:0x7f11853b2d82 [ 38.481298] 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 [ 38.483677] RSP: 002b:00007ffecf331958 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.484675] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f11853b2d82 [ 38.485625] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f11847ec000 [ 38.486565] RBP: 00007f11847ec000 R08: 0000000000000009 R09: 0000000000001000 [ 38.487519] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561adeb80b20 [ 38.488465] R13: 00007ffecf331970 R14: 00007ffecf3319a0 R15: 00007ffecf331d00 [ 38.489418] [ 38.489747] [ 38.489978] Allocated by task 214: [ 38.490452] kasan_save_stack+0x22/0x50 [ 38.491007] kasan_set_track+0x25/0x30 [ 38.491558] __kasan_slab_alloc+0x59/0x70 [ 38.492146] kmem_cache_alloc+0x16b/0x370 [ 38.492719] vm_area_dup+0x20/0x160 [ 38.493225] __split_vma+0x170/0x950 [ 38.493745] split_vma+0xc6/0x110 [ 38.494236] mprotect_fixup+0x8d2/0xb30 [ 38.494796] do_mprotect_pkey+0x87e/0xd40 [ 38.495384] __x64_sys_mprotect+0x78/0xc0 [ 38.495964] do_syscall_64+0x3f/0x90 [ 38.496485] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.497192] [ 38.497431] Freed by task 19: [ 38.497856] kasan_save_stack+0x22/0x50 [ 38.498414] kasan_set_track+0x25/0x30 [ 38.498966] kasan_save_free_info+0x2b/0x50 [ 38.499571] __kasan_slab_free+0x10a/0x190 [ 38.500231] kmem_cache_free+0x10d/0x4d0 [ 38.500795] rcu_core+0x8c8/0x2860 [ 38.501297] __do_softirq+0x1b7/0x7d4 [ 38.501824] [ 38.502065] Last potentially related work creation: [ 38.502709] kasan_save_stack+0x22/0x50 [ 38.503267] __kasan_record_aux_stack+0x8e/0xa0 [ 38.503913] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.504637] remove_vma+0x139/0x170 [ 38.505137] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.505754] do_vmi_munmap+0x1f1/0x2b0 [ 38.506289] __vm_munmap+0x138/0x3a0 [ 38.506808] __x64_sys_munmap+0x59/0x80 [ 38.507375] do_syscall_64+0x3f/0x90 [ 38.507904] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.508614] [ 38.508852] The buggy address belongs to the object at ffff88801a01e740 [ 38.508852] which belongs to the cache vm_area_struct of size 168 [ 38.510503] The buggy address is located 88 bytes inside of [ 38.510503] freed 168-byte region [ffff88801a01e740, ffff88801a01e7e8) [ 38.512033] [ 38.512268] The buggy address belongs to the physical page: [ 38.512976] page:000000008eb4fcdd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a01e [ 38.514144] memcg:ffff88800ed2f801 [ 38.514602] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.515307] page_type: 0xffffffff() [ 38.515807] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 38.516823] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed2f801 [ 38.517834] page dumped because: kasan: bad access detected [ 38.518565] [ 38.518804] Memory state around the buggy address: [ 38.519452] ffff88801a01e680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.520407] ffff88801a01e700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 38.521352] >ffff88801a01e780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.522296] ^ [ 38.522838] ffff88801a01e800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.523802] ffff88801a01e880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.524744] ================================================================== [ 38.525860] Disabling lock debugging due to kernel taint [ 41.047404] BUG: Bad rss-counter state mm:000000003832bbc3 type:MM_FILEPAGES val:33 [ 41.048414] BUG: Bad rss-counter state mm:000000003832bbc3 type:MM_ANONPAGES val:22 [ 41.541396] BUG: Bad rss-counter state mm:000000005e7a92a7 type:MM_FILEPAGES val:33 [ 41.542555] BUG: Bad rss-counter state mm:000000005e7a92a7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1231' (ECDSA) to the list of known hosts. 2023/06/19 17:08:22 fuzzer started 2023/06/19 17:08:22 dialing manager at localhost:44161 2023/06/19 17:08:22 checking machine... 2023/06/19 17:08:22 checking revisions... [ 42.261284] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:08:22 testing simple program... [ 42.308961] cgroup: Unknown subsys name 'net' [ 42.366539] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:08:13 Registers: info registers vcpu 0 RAX=ffff7fffffffffff RBX=0000000000000000 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff110028dfe68 RSP=ffff8880146ff310 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6c88 R12=ffffffff8560b640 R13=ffffffff814c84f5 R14=ffffffff85652a88 R15=0000000000092c40 RIP=ffffffff8180eef9 RFL=00000216 [----AP-] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fd5a8b51900 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=00007fd5a7f60670 CR3=000000000da8c000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=3ddc82779672273f00000000000ae988 XMM05=cb0779bc0370f6a60000000000134618 XMM06=c291bd5c70af25b90000000000133408 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001d34239 RBX=ffff88800e9a1198 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800e9a11c8 RBP=ffff888008a651a0 RSP=ffff8880183f7c98 R8 =0000000000000001 R9 =ffffed100307ef87 R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff888008a64eb0 R14=ffffffff818c75ae R15=ffff88800dc7c180 RIP=ffffffff81846362 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 00007fe1c3b30900 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=00007ffe8000d000 CR3=0000000013a7c000 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=563412feff00545000000000000080fe XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000