syzkaller login: [ 41.994552] BUG: Bad rss-counter state mm:00000000a81a0df3 type:MM_FILEPAGES val:33 [ 41.995747] BUG: Bad rss-counter state mm:00000000a81a0df3 type:MM_ANONPAGES val:22 [ 42.033425] ================================================================== [ 42.034562] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.035770] Read of size 8 at addr ffff88800f503c20 by task sshd/224 [ 42.036696] [ 42.036959] CPU: 0 PID: 224 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.037977] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.039127] Call Trace: [ 42.039510] [ 42.039850] dump_stack_lvl+0x91/0xf0 [ 42.040439] print_report+0xcc/0x620 [ 42.041018] ? __virt_addr_valid+0x102/0x340 [ 42.041671] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.042409] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.043169] kasan_report+0xbe/0xf0 [ 42.043749] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.044521] vma_interval_tree_remove+0xc75/0xec0 [ 42.045119] vma_prepare+0xc54/0x11a0 [ 42.045600] __split_vma+0x5af/0x950 [ 42.046073] ? __pfx___split_vma+0x10/0x10 [ 42.046604] ? find_held_lock+0x2c/0x110 [ 42.047124] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.047689] ? lock_is_held_type+0x9f/0x120 [ 42.048240] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.048843] ? mtree_range_walk+0x632/0x900 [ 42.049392] ? mas_walk+0x5c7/0x7c0 [ 42.049871] do_vmi_munmap+0x1f1/0x2b0 [ 42.050365] mmap_region+0x1f9/0x2660 [ 42.050841] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.051349] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.052063] ? __pfx_lock_acquire+0x10/0x10 [ 42.052612] ? __pfx_mmap_region+0x10/0x10 [ 42.053151] ? security_mmap_addr+0x7d/0xa0 [ 42.053681] ? get_unmapped_area+0x1f5/0x3f0 [ 42.054223] do_mmap+0x854/0xf00 [ 42.054665] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.055154] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.055716] ksys_mmap_pgoff+0x3af/0x500 [ 42.056225] do_syscall_64+0x3f/0x90 [ 42.056709] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.057347] RIP: 0033:0x7f5d29e61d82 [ 42.057801] 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 [ 42.059906] RSP: 002b:00007ffc7d52c158 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.060813] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5d29e61d82 [ 42.061659] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5d2929b000 [ 42.062494] RBP: 00007f5d2929b000 R08: 0000000000000009 R09: 0000000000001000 [ 42.063330] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559016be6ec0 [ 42.064189] R13: 00007ffc7d52c170 R14: 00007ffc7d52c1a0 R15: 00007ffc7d52c500 [ 42.065041] [ 42.065331] [ 42.065551] Allocated by task 217: [ 42.065978] kasan_save_stack+0x22/0x50 [ 42.066484] kasan_set_track+0x25/0x30 [ 42.066980] __kasan_slab_alloc+0x59/0x70 [ 42.067501] kmem_cache_alloc+0x16b/0x370 [ 42.068019] vm_area_dup+0x20/0x160 [ 42.068483] __split_vma+0x170/0x950 [ 42.068945] split_vma+0xc6/0x110 [ 42.069381] mprotect_fixup+0x8d2/0xb30 [ 42.069884] do_mprotect_pkey+0x87e/0xd40 [ 42.070405] __x64_sys_mprotect+0x78/0xc0 [ 42.070920] do_syscall_64+0x3f/0x90 [ 42.071390] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.072025] [ 42.072256] Freed by task 217: [ 42.072648] kasan_save_stack+0x22/0x50 [ 42.073149] kasan_set_track+0x25/0x30 [ 42.073642] kasan_save_free_info+0x2b/0x50 [ 42.074169] __kasan_slab_free+0x10a/0x190 [ 42.074700] kmem_cache_free+0x10d/0x4d0 [ 42.075205] rcu_core+0x8c8/0x2860 [ 42.075646] __do_softirq+0x1b7/0x7d4 [ 42.076124] [ 42.076342] Last potentially related work creation: [ 42.076923] kasan_save_stack+0x22/0x50 [ 42.077422] __kasan_record_aux_stack+0x8e/0xa0 [ 42.077987] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.078626] remove_vma+0x139/0x170 [ 42.079073] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.079631] do_vmi_munmap+0x1f1/0x2b0 [ 42.080126] __vm_munmap+0x138/0x3a0 [ 42.080596] __x64_sys_munmap+0x59/0x80 [ 42.081088] do_syscall_64+0x3f/0x90 [ 42.081556] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.082192] [ 42.082405] The buggy address belongs to the object at ffff88800f503bc8 [ 42.082405] which belongs to the cache vm_area_struct of size 168 [ 42.083862] The buggy address is located 88 bytes inside of [ 42.083862] freed 168-byte region [ffff88800f503bc8, ffff88800f503c70) [ 42.085291] [ 42.085514] The buggy address belongs to the physical page: [ 42.086170] page:00000000654b4b9a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf503 [ 42.087238] memcg:ffff88800ded0501 [ 42.087662] flags: 0x100000000000200(slab|node=0|zone=1) [ 42.088318] page_type: 0xffffffff() [ 42.088767] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 42.089680] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ded0501 [ 42.090575] page dumped because: kasan: bad access detected [ 42.091233] [ 42.091448] Memory state around the buggy address: [ 42.092027] ffff88800f503b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 42.092881] ffff88800f503b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 42.093727] >ffff88800f503c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 42.094572] ^ [ 42.095098] ffff88800f503c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 42.095945] ffff88800f503d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 42.096800] ================================================================== [ 42.097831] Disabling lock debugging due to kernel taint [ 43.905536] BUG: Bad rss-counter state mm:00000000f9fdf692 type:MM_FILEPAGES val:33 [ 43.906637] BUG: Bad rss-counter state mm:00000000f9fdf692 type:MM_ANONPAGES val:22 [ 44.289331] BUG: Bad rss-counter state mm:00000000505afa07 type:MM_FILEPAGES val:33 [ 44.291054] BUG: Bad rss-counter state mm:00000000505afa07 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24782' (ECDSA) to the list of known hosts. 2023/06/19 21:42:58 fuzzer started 2023/06/19 21:42:58 dialing manager at localhost:44161 2023/06/19 21:42:58 checking machine... 2023/06/19 21:42:58 checking revisions... [ 44.867066] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:42:58 testing simple program... [ 44.908280] cgroup: Unknown subsys name 'net' [ 44.960383] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:42:54 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000010 RCX=0000000000000000 RDX=ffff8880196551c0 RSI=ffffffff84e38f20 RDI=0000000000000003 RBP=ffff888015bac810 RSP=ffff8880167d7cb8 R8 =0000000000000000 R9 =0000000000000002 R10=0000000000000002 R11=0000000000000000 R12=0000000000000002 R13=0000000000000002 R14=00007f0670b60000 R15=ffffffffffffffff RIP=ffffffff814c03e6 RFL=00000293 [--S-A-C] 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 00007f067079a900 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=00007f06712ee044 CR3=000000000e0b4000 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=5113f90f9d8e621b567e13d03312b9e5 XMM03=41a11da421f1eded01bf64138b26141c XMM04=2a8c1259a6417f03a5550f1f8b220ee2 XMM05=000000000000000000000000000000ff XMM06=2a8c125921417f0301550f138b220e1c XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 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=00007fff832a1a48 CR3=000000000c66c000 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=2037353a32343a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3333 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3333325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037353a32343a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000