Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 30.535363] BUG: Bad rss-counter state mm:000000004857d51e type:MM_FILEPAGES val:33 [ 30.536925] BUG: Bad rss-counter state mm:000000004857d51e type:MM_ANONPAGES val:22 [ 30.705096] ================================================================== [ 30.706075] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.707239] Read of size 8 at addr ffff88800f39ad08 by task sshd/219 [ 30.708044] [ 30.708258] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.709175] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.710217] Call Trace: [ 30.710545] [ 30.710870] dump_stack_lvl+0x91/0xf0 [ 30.711364] print_report+0xcc/0x620 [ 30.711841] ? __virt_addr_valid+0x102/0x340 [ 30.712424] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.713073] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.713722] kasan_report+0xbe/0xf0 [ 30.714232] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.714863] vma_interval_tree_remove+0xc75/0xec0 [ 30.715506] vma_prepare+0xc54/0x11a0 [ 30.715993] __split_vma+0x5af/0x950 [ 30.716502] ? __pfx___split_vma+0x10/0x10 [ 30.717043] ? find_held_lock+0x2c/0x110 [ 30.717623] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.718190] ? lock_is_held_type+0x9f/0x120 [ 30.718764] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.719374] ? mtree_range_walk+0x632/0x900 [ 30.719952] ? mas_walk+0x5c7/0x7c0 [ 30.720428] do_vmi_munmap+0x1f1/0x2b0 [ 30.720991] mmap_region+0x1f9/0x2660 [ 30.721488] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.722041] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.722786] ? __pfx_lock_acquire+0x10/0x10 [ 30.723350] ? __pfx_mmap_region+0x10/0x10 [ 30.723892] ? security_mmap_addr+0x7d/0xa0 [ 30.724448] ? get_unmapped_area+0x1f5/0x3f0 [ 30.725013] do_mmap+0x854/0xf00 [ 30.725514] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.726035] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.726633] ksys_mmap_pgoff+0x3af/0x500 [ 30.727186] do_syscall_64+0x3f/0x90 [ 30.727721] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.728369] RIP: 0033:0x7ffa0f384d82 [ 30.728869] 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 [ 30.731112] RSP: 002b:00007ffc772fe788 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.732060] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ffa0f384d82 [ 30.732905] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ffa0e7be000 [ 30.733815] RBP: 00007ffa0e7be000 R08: 0000000000000009 R09: 0000000000001000 [ 30.734698] R10: 0000000000000812 R11: 0000000000000206 R12: 00005582dfc87f70 [ 30.735594] R13: 00007ffc772fe7a0 R14: 00007ffc772fe7d0 R15: 00007ffc772feb30 [ 30.736493] [ 30.736789] [ 30.737005] Allocated by task 212: [ 30.737444] kasan_save_stack+0x22/0x50 [ 30.737993] kasan_set_track+0x25/0x30 [ 30.738493] __kasan_slab_alloc+0x59/0x70 [ 30.739054] kmem_cache_alloc+0x16b/0x370 [ 30.739570] vm_area_dup+0x20/0x160 [ 30.740049] __split_vma+0x170/0x950 [ 30.740512] split_vma+0xc6/0x110 [ 30.740966] mprotect_fixup+0x8d2/0xb30 [ 30.741508] do_mprotect_pkey+0x87e/0xd40 [ 30.742034] __x64_sys_mprotect+0x78/0xc0 [ 30.742571] do_syscall_64+0x3f/0x90 [ 30.743043] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.743728] [ 30.743948] Freed by task 212: [ 30.744377] kasan_save_stack+0x22/0x50 [ 30.744897] kasan_set_track+0x25/0x30 [ 30.745416] kasan_save_free_info+0x2b/0x50 [ 30.745978] __kasan_slab_free+0x10a/0x190 [ 30.746511] kmem_cache_free+0x10d/0x4d0 [ 30.747068] rcu_core+0x8c8/0x2860 [ 30.747506] __do_softirq+0x1b7/0x7d4 [ 30.748024] [ 30.748239] Last potentially related work creation: [ 30.748858] kasan_save_stack+0x22/0x50 [ 30.749393] __kasan_record_aux_stack+0x8e/0xa0 [ 30.750015] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.750668] remove_vma+0x139/0x170 [ 30.751161] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.751717] do_vmi_munmap+0x1f1/0x2b0 [ 30.752243] __vm_munmap+0x138/0x3a0 [ 30.752716] __x64_sys_munmap+0x59/0x80 [ 30.753216] do_syscall_64+0x3f/0x90 [ 30.753733] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.754372] [ 30.754623] The buggy address belongs to the object at ffff88800f39acb0 [ 30.754623] which belongs to the cache vm_area_struct of size 168 [ 30.756139] The buggy address is located 88 bytes inside of [ 30.756139] freed 168-byte region [ffff88800f39acb0, ffff88800f39ad58) [ 30.757613] [ 30.757872] The buggy address belongs to the physical page: [ 30.758545] page:000000001e4b01a7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf39a [ 30.759674] memcg:ffff88800cb4ed01 [ 30.760136] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.760824] page_type: 0xffffffff() [ 30.761382] raw: 0100000000000200 ffff88800879fc80 ffffea000032f240 dead000000000008 [ 30.762448] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cb4ed01 [ 30.763403] page dumped because: kasan: bad access detected [ 30.764087] [ 30.764304] Memory state around the buggy address: [ 30.764940] ffff88800f39ac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.765884] ffff88800f39ac80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.766784] >ffff88800f39ad00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.767657] ^ [ 30.768138] ffff88800f39ad80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.769043] ffff88800f39ae00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.769953] ================================================================== [ 30.770979] Disabling lock debugging due to kernel taint [ 33.164887] BUG: Bad rss-counter state mm:00000000093e2917 type:MM_FILEPAGES val:33 [ 33.166129] BUG: Bad rss-counter state mm:00000000093e2917 type:MM_ANONPAGES val:22 [ 33.541572] BUG: Bad rss-counter state mm:00000000d621fa48 type:MM_FILEPAGES val:33 [ 33.542567] BUG: Bad rss-counter state mm:00000000d621fa48 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52333' (ECDSA) to the list of known hosts. 2023/06/19 18:07:32 fuzzer started 2023/06/19 18:07:32 dialing manager at localhost:44161 2023/06/19 18:07:32 checking machine... 2023/06/19 18:07:32 checking revisions... [ 34.280441] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:07:32 testing simple program... [ 34.328438] cgroup: Unknown subsys name 'net' [ 34.376074] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:07:31 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 0000000000000000 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=00007fe92d8c0028 CR3=000000000d808000 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=cd9d82e1a6c6e79f124d748352fad6ee XMM02=000000000011fec0d59e07bde36eea69 XMM03=000000000011ffe8ec2efd57dc4c00df XMM04=ba53c73b984da4e800000000000ae988 XMM05=ddeae253539037bb0000000000135d98 XMM06=806171799158d9670000000000134ac8 XMM07=fb795ef6d65770560000000000125320 XMM08=2c67c8bc2e329bc3000000000011ffe8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff846000aa RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800eedff01 RSI=ffff88800eedff50 RDI=ffff88800eedff50 RBP=ffff88800eedf8e0 RSP=ffff88800eedf818 R8 =ffffffff864b024a R9 =ffff88800eedf8c8 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff88800eedf8e8 R13=ffff88800eedf8d0 R14=ffff88800eedff58 R15=ffff88800eedf888 RIP=ffffffff81131041 RFL=00000202 [-------] 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 00007f565e9bc900 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=00007f565ef740b0 CR3=000000000eb28000 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=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