syzkaller login: [ 40.511155] BUG: Bad rss-counter state mm:00000000dc53d7c9 type:MM_FILEPAGES val:33 [ 40.512722] BUG: Bad rss-counter state mm:00000000dc53d7c9 type:MM_ANONPAGES val:22 [ 40.676466] ================================================================== [ 40.677389] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.678324] Read of size 8 at addr ffff88800e86d6b0 by task sshd/221 [ 40.679099] [ 40.679322] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.680313] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.681294] Call Trace: [ 40.681613] [ 40.681922] dump_stack_lvl+0x91/0xf0 [ 40.682410] print_report+0xcc/0x620 [ 40.682902] ? __virt_addr_valid+0x102/0x340 [ 40.683450] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.684083] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.684702] kasan_report+0xbe/0xf0 [ 40.685197] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.685830] vma_interval_tree_remove+0xc75/0xec0 [ 40.686433] vma_prepare+0xc54/0x11a0 [ 40.686912] __split_vma+0x5af/0x950 [ 40.687389] ? __pfx___split_vma+0x10/0x10 [ 40.687940] ? find_held_lock+0x2c/0x110 [ 40.688466] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.689038] ? lock_is_held_type+0x9f/0x120 [ 40.689575] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.690183] ? mtree_range_walk+0x632/0x900 [ 40.690730] ? mas_walk+0x5c7/0x7c0 [ 40.691208] do_vmi_munmap+0x1f1/0x2b0 [ 40.691702] mmap_region+0x1f9/0x2660 [ 40.692216] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.692728] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.693443] ? __pfx_lock_acquire+0x10/0x10 [ 40.693978] ? __pfx_mmap_region+0x10/0x10 [ 40.694508] ? security_mmap_addr+0x7d/0xa0 [ 40.695036] ? get_unmapped_area+0x1f5/0x3f0 [ 40.695584] do_mmap+0x854/0xf00 [ 40.696039] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.696533] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.697104] ksys_mmap_pgoff+0x3af/0x500 [ 40.697613] do_syscall_64+0x3f/0x90 [ 40.698097] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.698737] RIP: 0033:0x7f0c9195cd82 [ 40.699188] 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 [ 40.701327] RSP: 002b:00007ffce087fb98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.702230] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0c9195cd82 [ 40.703080] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0c90d96000 [ 40.703952] RBP: 00007f0c90d96000 R08: 0000000000000009 R09: 0000000000001000 [ 40.704808] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557c6bf57ec0 [ 40.705666] R13: 00007ffce087fbb0 R14: 00007ffce087fbe0 R15: 00007ffce087ff40 [ 40.706521] [ 40.706819] [ 40.707039] Allocated by task 214: [ 40.707465] kasan_save_stack+0x22/0x50 [ 40.707984] kasan_set_track+0x25/0x30 [ 40.708477] __kasan_slab_alloc+0x59/0x70 [ 40.709004] kmem_cache_alloc+0x16b/0x370 [ 40.709521] vm_area_dup+0x20/0x160 [ 40.709977] __split_vma+0x170/0x950 [ 40.710442] split_vma+0xc6/0x110 [ 40.710890] mprotect_fixup+0x8d2/0xb30 [ 40.711394] do_mprotect_pkey+0x87e/0xd40 [ 40.711952] __x64_sys_mprotect+0x78/0xc0 [ 40.712476] do_syscall_64+0x3f/0x90 [ 40.712956] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.713607] [ 40.713822] Freed by task 203: [ 40.714223] kasan_save_stack+0x22/0x50 [ 40.714733] kasan_set_track+0x25/0x30 [ 40.715238] kasan_save_free_info+0x2b/0x50 [ 40.715791] __kasan_slab_free+0x10a/0x190 [ 40.716339] kmem_cache_free+0x10d/0x4d0 [ 40.716857] rcu_core+0x8c8/0x2860 [ 40.717300] __do_softirq+0x1b7/0x7d4 [ 40.717783] [ 40.718001] Last potentially related work creation: [ 40.718597] kasan_save_stack+0x22/0x50 [ 40.719110] __kasan_record_aux_stack+0x8e/0xa0 [ 40.719688] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.720361] remove_vma+0x139/0x170 [ 40.720824] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.721395] do_vmi_munmap+0x1f1/0x2b0 [ 40.721888] __vm_munmap+0x138/0x3a0 [ 40.722363] __x64_sys_munmap+0x59/0x80 [ 40.722866] do_syscall_64+0x3f/0x90 [ 40.723342] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.724010] [ 40.724224] The buggy address belongs to the object at ffff88800e86d658 [ 40.724224] which belongs to the cache vm_area_struct of size 168 [ 40.725706] The buggy address is located 88 bytes inside of [ 40.725706] freed 168-byte region [ffff88800e86d658, ffff88800e86d700) [ 40.727120] [ 40.727337] The buggy address belongs to the physical page: [ 40.728015] page:000000007e8d4891 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe86d [ 40.729097] memcg:ffff8880186dff01 [ 40.729522] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.730163] page_type: 0xffffffff() [ 40.730615] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 40.731533] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880186dff01 [ 40.732450] page dumped because: kasan: bad access detected [ 40.733109] [ 40.733329] Memory state around the buggy address: [ 40.733911] ffff88800e86d580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.734765] ffff88800e86d600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 40.735644] >ffff88800e86d680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.736508] ^ [ 40.737100] ffff88800e86d700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 40.737962] ffff88800e86d780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 40.738812] ================================================================== [ 40.739819] Disabling lock debugging due to kernel taint [ 42.433424] BUG: Bad rss-counter state mm:00000000bb40df24 type:MM_FILEPAGES val:33 [ 42.434498] BUG: Bad rss-counter state mm:00000000bb40df24 type:MM_ANONPAGES val:22 [ 42.853838] BUG: Bad rss-counter state mm:00000000c660b487 type:MM_FILEPAGES val:33 [ 42.854594] BUG: Bad rss-counter state mm:00000000c660b487 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5589' (ECDSA) to the list of known hosts. 2023/06/19 21:15:08 fuzzer started 2023/06/19 21:15:09 dialing manager at localhost:44161 2023/06/19 21:15:09 checking machine... 2023/06/19 21:15:09 checking revisions... [ 43.532311] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:15:09 testing simple program... [ 43.579597] cgroup: Unknown subsys name 'net' [ 43.619381] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:14:59 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000001 RSI=ffffffff849051e0 RDI=ffff8880191403b9 RBP=ffff888019140398 RSP=ffff8880196ffcc0 R8 =0000000000000002 R9 =0000000000000000 R10=0000000000000007 R11=00000000000b6996 R12=ffffffff87f31700 R13=0000000000000000 R14=ffffffff87b67200 R15=ffff888019140360 RIP=ffffffff812db3fc RFL=00000297 [--S-APC] 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 00007f84cf1f3900 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=00007f84cf7ab0b0 CR3=000000000e056000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=00007f8f06394410 CR3=00000000096ea000 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=3df9800ee61f9b91b94502cc0594a33e XMM02=2c67c8bc2e329bc3000000000011db98 XMM03=fb795ef6d65770560000000000124910 XMM04=6a5b62994729d0ae00000000000ae988 XMM05=e4cb8bb95a7664b60000000000134468 XMM06=e1a0c04584bd3a7100000000001332d0 XMM07=e042d86d42eb936e0000000000124b90 XMM08=df073c619f4c9fcb000000000011dbf8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000