syzkaller login: [ 31.492453] BUG: Bad rss-counter state mm:000000008e2b42d7 type:MM_FILEPAGES val:33 [ 31.494633] BUG: Bad rss-counter state mm:000000008e2b42d7 type:MM_ANONPAGES val:22 [ 31.665811] ================================================================== [ 31.667032] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.668510] Read of size 8 at addr ffff88800e10e968 by task sshd/219 [ 31.669337] [ 31.669566] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.670498] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.671512] Call Trace: [ 31.671838] [ 31.672152] dump_stack_lvl+0x91/0xf0 [ 31.672671] print_report+0xcc/0x620 [ 31.673172] ? __virt_addr_valid+0x102/0x340 [ 31.673747] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.674371] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.674995] kasan_report+0xbe/0xf0 [ 31.675470] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.676130] vma_interval_tree_remove+0xc75/0xec0 [ 31.676732] vma_prepare+0xc54/0x11a0 [ 31.677234] __split_vma+0x5af/0x950 [ 31.677713] ? __pfx___split_vma+0x10/0x10 [ 31.678253] ? find_held_lock+0x2c/0x110 [ 31.678795] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.679373] ? lock_is_held_type+0x9f/0x120 [ 31.679927] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.680571] ? mtree_range_walk+0x632/0x900 [ 31.681127] ? mas_walk+0x5c7/0x7c0 [ 31.681606] do_vmi_munmap+0x1f1/0x2b0 [ 31.682100] mmap_region+0x1f9/0x2660 [ 31.682582] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.683098] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.683820] ? __pfx_lock_acquire+0x10/0x10 [ 31.684368] ? __pfx_mmap_region+0x10/0x10 [ 31.684900] ? security_mmap_addr+0x7d/0xa0 [ 31.685441] ? get_unmapped_area+0x1f5/0x3f0 [ 31.686004] do_mmap+0x854/0xf00 [ 31.686460] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.686961] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.687532] ksys_mmap_pgoff+0x3af/0x500 [ 31.688066] do_syscall_64+0x3f/0x90 [ 31.688548] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.689202] RIP: 0033:0x7f191b5a0d82 [ 31.689664] 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 [ 31.691800] RSP: 002b:00007ffd912543e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.692727] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f191b5a0d82 [ 31.693578] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f191a9da000 [ 31.694422] RBP: 00007f191a9da000 R08: 0000000000000009 R09: 0000000000001000 [ 31.695271] R10: 0000000000000812 R11: 0000000000000206 R12: 00005622fa4d5ec0 [ 31.696145] R13: 00007ffd91254400 R14: 00007ffd91254430 R15: 00007ffd91254790 [ 31.696999] [ 31.697297] [ 31.697513] Allocated by task 212: [ 31.697949] kasan_save_stack+0x22/0x50 [ 31.698466] kasan_set_track+0x25/0x30 [ 31.698970] __kasan_slab_alloc+0x59/0x70 [ 31.699497] kmem_cache_alloc+0x16b/0x370 [ 31.700032] vm_area_dup+0x20/0x160 [ 31.700496] __split_vma+0x170/0x950 [ 31.700972] split_vma+0xc6/0x110 [ 31.701419] mprotect_fixup+0x8d2/0xb30 [ 31.701951] do_mprotect_pkey+0x87e/0xd40 [ 31.702553] __x64_sys_mprotect+0x78/0xc0 [ 31.703161] do_syscall_64+0x3f/0x90 [ 31.703712] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.704496] [ 31.704747] Freed by task 19: [ 31.705189] kasan_save_stack+0x22/0x50 [ 31.705773] kasan_set_track+0x25/0x30 [ 31.706346] kasan_save_free_info+0x2b/0x50 [ 31.706969] __kasan_slab_free+0x10a/0x190 [ 31.707584] kmem_cache_free+0x10d/0x4d0 [ 31.708183] rcu_core+0x8c8/0x2860 [ 31.708698] __do_softirq+0x1b7/0x7d4 [ 31.709251] [ 31.709500] Last potentially related work creation: [ 31.710285] kasan_save_stack+0x22/0x50 [ 31.710869] __kasan_record_aux_stack+0x8e/0xa0 [ 31.711536] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.712309] remove_vma+0x139/0x170 [ 31.712834] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.713473] do_vmi_munmap+0x1f1/0x2b0 [ 31.714035] __vm_munmap+0x138/0x3a0 [ 31.714576] __x64_sys_munmap+0x59/0x80 [ 31.715151] do_syscall_64+0x3f/0x90 [ 31.715696] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.716506] [ 31.716731] Second to last potentially related work creation: [ 31.717425] kasan_save_stack+0x22/0x50 [ 31.717940] __kasan_record_aux_stack+0x8e/0xa0 [ 31.718519] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.719161] remove_vma+0x139/0x170 [ 31.719618] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.720183] do_vmi_munmap+0x1f1/0x2b0 [ 31.720664] __vm_munmap+0x138/0x3a0 [ 31.721129] __x64_sys_munmap+0x59/0x80 [ 31.721623] do_syscall_64+0x3f/0x90 [ 31.722104] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.722765] [ 31.722981] The buggy address belongs to the object at ffff88800e10e910 [ 31.722981] which belongs to the cache vm_area_struct of size 168 [ 31.724513] The buggy address is located 88 bytes inside of [ 31.724513] freed 168-byte region [ffff88800e10e910, ffff88800e10e9b8) [ 31.725921] [ 31.726141] The buggy address belongs to the physical page: [ 31.726817] page:00000000d7794b6e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe10e [ 31.727894] memcg:ffff88800dd79001 [ 31.728327] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.728979] page_type: 0xffffffff() [ 31.729430] raw: 0100000000000200 ffff8880087a0c80 ffffea00005fc5c0 dead000000000004 [ 31.730360] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd79001 [ 31.731277] page dumped because: kasan: bad access detected [ 31.731947] [ 31.732182] Memory state around the buggy address: [ 31.732786] ffff88800e10e800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.733677] ffff88800e10e880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.734559] >ffff88800e10e900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.735451] ^ [ 31.736280] ffff88800e10e980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.737168] ffff88800e10ea00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.738057] ================================================================== [ 31.739094] Disabling lock debugging due to kernel taint [ 33.911913] BUG: Bad rss-counter state mm:0000000001b67201 type:MM_FILEPAGES val:33 [ 33.912946] BUG: Bad rss-counter state mm:0000000001b67201 type:MM_ANONPAGES val:22 [ 34.336708] BUG: Bad rss-counter state mm:00000000b519cdea type:MM_FILEPAGES val:33 [ 34.337908] BUG: Bad rss-counter state mm:00000000b519cdea type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32785' (ECDSA) to the list of known hosts. 2023/06/21 01:19:37 fuzzer started 2023/06/21 01:19:38 dialing manager at localhost:36067 2023/06/21 01:19:38 checking machine... 2023/06/21 01:19:38 checking revisions... [ 35.076656] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:19:38 testing simple program... [ 35.121236] cgroup: Unknown subsys name 'net' [ 35.174530] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:19:37 Registers: info registers vcpu 0 RAX=ffff88800f163680 RBX=ffff88801c9b7a10 RCX=ffffffff81132ffe RDX=ffff88801c9b7928 RSI=0000000000000000 RDI=ffff88801c9b79e8 RBP=ffff88800f163680 RSP=ffff88801c9b7928 R8 =ffff88800c482000 R9 =0000000000000000 R10=ffff88801c9b7978 R11=0000000000000000 R12=0000000000000000 R13=ffff88801c9b79a0 R14=ffff88801c9b79c0 R15=ffff88801c9b7978 RIP=ffffffff8113300c 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 00007f62766a2900 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=00007f6276c5a0b0 CR3=0000000016b48000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f5fc3bf8ca0 CR3=000000000ee88000 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=790ed61f59f35bada0493b325d45cbe2 XMM02=2c67c8bc2e329bc3000000000011d5b8 XMM03=fb795ef6d65770560000000000121260 XMM04=d045d1ed4c5a812d00000000000ae988 XMM05=dfcdbad4f1609c3700000000001321c0 XMM06=806171799158d9670000000000132048 XMM07=e042d86d42eb936e0000000000121538 XMM08=b8b4e946cecd2191000000000011d618 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000