Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.502495] BUG: Bad rss-counter state mm:0000000095576761 type:MM_FILEPAGES val:33 [ 31.503645] BUG: Bad rss-counter state mm:0000000095576761 type:MM_ANONPAGES val:22 [ 31.662908] ================================================================== [ 31.663977] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.665085] Read of size 8 at addr ffff888015e83d08 by task sshd/220 [ 31.666133] [ 31.666402] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.667316] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.668278] Call Trace: [ 31.668592] [ 31.668877] dump_stack_lvl+0x91/0xf0 [ 31.669365] print_report+0xcc/0x620 [ 31.669836] ? __virt_addr_valid+0x102/0x340 [ 31.670387] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.670998] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.671612] kasan_report+0xbe/0xf0 [ 31.672095] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.672704] vma_interval_tree_remove+0xc75/0xec0 [ 31.673297] vma_prepare+0xc54/0x11a0 [ 31.673765] __split_vma+0x5af/0x950 [ 31.674242] ? __pfx___split_vma+0x10/0x10 [ 31.674773] ? find_held_lock+0x2c/0x110 [ 31.675289] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.675849] ? lock_is_held_type+0x9f/0x120 [ 31.676389] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.676999] ? mtree_range_walk+0x632/0x900 [ 31.677544] ? mas_walk+0x5c7/0x7c0 [ 31.678009] do_vmi_munmap+0x1f1/0x2b0 [ 31.678512] mmap_region+0x1f9/0x2660 [ 31.678988] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.679493] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.680193] ? __pfx_lock_acquire+0x10/0x10 [ 31.680712] ? __pfx_mmap_region+0x10/0x10 [ 31.681237] ? security_mmap_addr+0x7d/0xa0 [ 31.681757] ? get_unmapped_area+0x1f5/0x3f0 [ 31.682307] do_mmap+0x854/0xf00 [ 31.682737] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.683225] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.683779] ksys_mmap_pgoff+0x3af/0x500 [ 31.684278] do_syscall_64+0x3f/0x90 [ 31.684755] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.685395] RIP: 0033:0x7fad71b05d82 [ 31.685843] 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 [ 31.687951] RSP: 002b:00007ffdc57a0888 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.688840] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fad71b05d82 [ 31.689665] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fad70f3f000 [ 31.690522] RBP: 00007fad70f3f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.691352] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d6b6c60ec0 [ 31.692181] R13: 00007ffdc57a08a0 R14: 00007ffdc57a08d0 R15: 00007ffdc57a0c30 [ 31.693022] [ 31.693308] [ 31.693520] Allocated by task 213: [ 31.693937] kasan_save_stack+0x22/0x50 [ 31.694441] kasan_set_track+0x25/0x30 [ 31.694935] __kasan_slab_alloc+0x59/0x70 [ 31.695445] kmem_cache_alloc+0x16b/0x370 [ 31.695957] vm_area_dup+0x20/0x160 [ 31.696401] __split_vma+0x170/0x950 [ 31.696856] split_vma+0xc6/0x110 [ 31.697290] mprotect_fixup+0x8d2/0xb30 [ 31.697784] do_mprotect_pkey+0x87e/0xd40 [ 31.698321] __x64_sys_mprotect+0x78/0xc0 [ 31.698893] do_syscall_64+0x3f/0x90 [ 31.699398] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.700052] [ 31.700269] Freed by task 213: [ 31.700663] kasan_save_stack+0x22/0x50 [ 31.701170] kasan_set_track+0x25/0x30 [ 31.701670] kasan_save_free_info+0x2b/0x50 [ 31.702217] __kasan_slab_free+0x10a/0x190 [ 31.702761] kmem_cache_free+0x10d/0x4d0 [ 31.703279] rcu_core+0x8c8/0x2860 [ 31.703728] __do_softirq+0x1b7/0x7d4 [ 31.704218] [ 31.704436] Last potentially related work creation: [ 31.705025] kasan_save_stack+0x22/0x50 [ 31.705549] __kasan_record_aux_stack+0x8e/0xa0 [ 31.706147] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.706792] remove_vma+0x139/0x170 [ 31.707239] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.707796] do_vmi_munmap+0x1f1/0x2b0 [ 31.708282] __vm_munmap+0x138/0x3a0 [ 31.708748] __x64_sys_munmap+0x59/0x80 [ 31.709245] do_syscall_64+0x3f/0x90 [ 31.709724] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.710393] [ 31.710611] The buggy address belongs to the object at ffff888015e83cb0 [ 31.710611] which belongs to the cache vm_area_struct of size 168 [ 31.712089] The buggy address is located 88 bytes inside of [ 31.712089] freed 168-byte region [ffff888015e83cb0, ffff888015e83d58) [ 31.713462] [ 31.713673] The buggy address belongs to the physical page: [ 31.714335] page:00000000a4b1bb4a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15e83 [ 31.715402] memcg:ffff88800d53ad01 [ 31.715823] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.716452] page_type: 0xffffffff() [ 31.716896] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.717806] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d53ad01 [ 31.718711] page dumped because: kasan: bad access detected [ 31.719354] [ 31.719565] Memory state around the buggy address: [ 31.720137] ffff888015e83c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.720975] ffff888015e83c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.721815] >ffff888015e83d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.722649] ^ [ 31.723085] ffff888015e83d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.723917] ffff888015e83e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.724741] ================================================================== [ 31.725886] Disabling lock debugging due to kernel taint [ 33.882707] BUG: Bad rss-counter state mm:00000000f20d01ea type:MM_FILEPAGES val:33 [ 33.883484] BUG: Bad rss-counter state mm:00000000f20d01ea type:MM_ANONPAGES val:22 [ 34.316319] BUG: Bad rss-counter state mm:00000000b80351a5 type:MM_FILEPAGES val:33 [ 34.317099] BUG: Bad rss-counter state mm:00000000b80351a5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22878' (ECDSA) to the list of known hosts. 2023/06/21 05:22:50 fuzzer started 2023/06/21 05:22:50 dialing manager at localhost:36067 2023/06/21 05:22:50 checking machine... 2023/06/21 05:22:50 checking revisions... [ 35.050605] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:22:50 testing simple program... [ 35.099481] cgroup: Unknown subsys name 'net' [ 35.138749] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:22:49 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880099af2b8 RCX=0000000000000002 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8560b640 RBP=0000000000000000 RSP=ffff8880099af2a8 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8e97 RFL=00000282 [--S----] 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 00007f42b1ef7900 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=00007f42b12f18f0 CR3=000000000962e000 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=92d98d464852adbe774a5c64aa2b1c77 XMM02=000000000011afc8d59e07bde36eea69 XMM03=000000000011b0f0ec2efd57dc4c00df XMM04=914cc00ba64ade6000000000000ae988 XMM05=30081b8b7c1b57fa0000000000132a90 XMM06=4fda316b135da52b0000000000131510 XMM07=fb795ef6d65770560000000000121a90 XMM08=2c67c8bc2e329bc3000000000011b0f0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff110018a2ebb RSI=ffffffff846000aa RDI=ffff88800c517648 RBP=ffff88800c517618 RSP=ffff88800c517570 R8 =0000000000000001 R9 =ffff88800c5175c0 R10=0000000000038001 R11=00000000000b5080 R12=ffff88800c517648 R13=0000000000000000 R14=ffff88800f370000 R15=0000000000000000 RIP=ffffffff813ad47f RFL=00000286 [--S--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 00007f0df5d8a900 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=00007ffcfcce4000 CR3=000000000e8dc000 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=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