syzkaller login: [ 35.467581] BUG: Bad rss-counter state mm:00000000374e5084 type:MM_FILEPAGES val:33 [ 35.468857] BUG: Bad rss-counter state mm:00000000374e5084 type:MM_ANONPAGES val:22 [ 35.614569] ================================================================== [ 35.615552] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.616607] Read of size 8 at addr ffff8880094f25c8 by task sshd/220 [ 35.617450] [ 35.617674] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.618597] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.619611] Call Trace: [ 35.619940] [ 35.620245] dump_stack_lvl+0x91/0xf0 [ 35.620741] print_report+0xcc/0x620 [ 35.621253] ? __virt_addr_valid+0x102/0x340 [ 35.621824] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.622497] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.623151] kasan_report+0xbe/0xf0 [ 35.623639] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.624286] vma_interval_tree_remove+0xc75/0xec0 [ 35.624908] vma_prepare+0xc54/0x11a0 [ 35.625402] __split_vma+0x5af/0x950 [ 35.625880] ? __pfx___split_vma+0x10/0x10 [ 35.626465] ? find_held_lock+0x2c/0x110 [ 35.626990] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.627576] ? lock_is_held_type+0x9f/0x120 [ 35.628132] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.628743] ? mtree_range_walk+0x632/0x900 [ 35.629320] ? mas_walk+0x5c7/0x7c0 [ 35.629806] do_vmi_munmap+0x1f1/0x2b0 [ 35.630342] mmap_region+0x1f9/0x2660 [ 35.630833] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.631372] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.632102] ? __pfx_lock_acquire+0x10/0x10 [ 35.632645] ? __pfx_mmap_region+0x10/0x10 [ 35.633204] ? security_mmap_addr+0x7d/0xa0 [ 35.633736] ? get_unmapped_area+0x1f5/0x3f0 [ 35.634354] do_mmap+0x854/0xf00 [ 35.634803] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.635321] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.635896] ksys_mmap_pgoff+0x3af/0x500 [ 35.636422] do_syscall_64+0x3f/0x90 [ 35.636908] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.637580] RIP: 0033:0x7f5c459ded82 [ 35.638045] 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 [ 35.640286] RSP: 002b:00007ffc02856de8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.641238] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5c459ded82 [ 35.642096] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5c44e18000 [ 35.642966] RBP: 00007f5c44e18000 R08: 0000000000000009 R09: 0000000000001000 [ 35.643840] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d6cad2eec0 [ 35.644690] R13: 00007ffc02856e00 R14: 00007ffc02856e30 R15: 00007ffc02857190 [ 35.645568] [ 35.645861] [ 35.646076] Allocated by task 213: [ 35.646536] kasan_save_stack+0x22/0x50 [ 35.647043] kasan_set_track+0x25/0x30 [ 35.647542] __kasan_slab_alloc+0x59/0x70 [ 35.648068] kmem_cache_alloc+0x16b/0x370 [ 35.648591] vm_area_dup+0x20/0x160 [ 35.649049] __split_vma+0x170/0x950 [ 35.649518] split_vma+0xc6/0x110 [ 35.649966] mprotect_fixup+0x8d2/0xb30 [ 35.650477] do_mprotect_pkey+0x87e/0xd40 [ 35.651015] __x64_sys_mprotect+0x78/0xc0 [ 35.651549] do_syscall_64+0x3f/0x90 [ 35.652020] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.652660] [ 35.652873] Freed by task 213: [ 35.653264] kasan_save_stack+0x22/0x50 [ 35.653766] kasan_set_track+0x25/0x30 [ 35.654275] kasan_save_free_info+0x2b/0x50 [ 35.654805] __kasan_slab_free+0x10a/0x190 [ 35.655353] kmem_cache_free+0x10d/0x4d0 [ 35.655861] rcu_core+0x8c8/0x2860 [ 35.656303] __do_softirq+0x1b7/0x7d4 [ 35.656785] [ 35.657000] Last potentially related work creation: [ 35.657592] kasan_save_stack+0x22/0x50 [ 35.658093] __kasan_record_aux_stack+0x8e/0xa0 [ 35.658686] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.659338] remove_vma+0x139/0x170 [ 35.659789] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.660348] do_vmi_munmap+0x1f1/0x2b0 [ 35.660829] __vm_munmap+0x138/0x3a0 [ 35.661298] __x64_sys_munmap+0x59/0x80 [ 35.661798] do_syscall_64+0x3f/0x90 [ 35.662281] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.662935] [ 35.663150] The buggy address belongs to the object at ffff8880094f2570 [ 35.663150] which belongs to the cache vm_area_struct of size 168 [ 35.664618] The buggy address is located 88 bytes inside of [ 35.664618] freed 168-byte region [ffff8880094f2570, ffff8880094f2618) [ 35.666027] [ 35.666264] The buggy address belongs to the physical page: [ 35.666942] page:00000000fbadf8af refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x94f2 [ 35.668053] memcg:ffff8880197b4001 [ 35.668499] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.669162] page_type: 0xffffffff() [ 35.669620] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.670543] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880197b4001 [ 35.671459] page dumped because: kasan: bad access detected [ 35.672130] [ 35.672347] Memory state around the buggy address: [ 35.672935] ffff8880094f2480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.673807] ffff8880094f2500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 35.674695] >ffff8880094f2580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.675565] ^ [ 35.676229] ffff8880094f2600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 35.677078] ffff8880094f2680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.677938] ================================================================== [ 35.679182] Disabling lock debugging due to kernel taint [ 37.901942] BUG: Bad rss-counter state mm:00000000851da091 type:MM_FILEPAGES val:33 [ 37.903208] BUG: Bad rss-counter state mm:00000000851da091 type:MM_ANONPAGES val:22 [ 38.297367] BUG: Bad rss-counter state mm:00000000fc183fd0 type:MM_FILEPAGES val:33 [ 38.298445] BUG: Bad rss-counter state mm:00000000fc183fd0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42209' (ECDSA) to the list of known hosts. 2023/06/19 22:34:23 fuzzer started 2023/06/19 22:34:23 dialing manager at localhost:44161 2023/06/19 22:34:23 checking machine... 2023/06/19 22:34:23 checking revisions... [ 39.062385] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:34:23 testing simple program... [ 39.112013] cgroup: Unknown subsys name 'net' [ 39.150089] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:34:19 Registers: info registers vcpu 0 RAX=ffffffff8180c585 RBX=0000000000000001 RCX=ffffffff86137501 RDX=ffff8880164f7910 RSI=ffffffff8180c585 RDI=ffff8880164f78c8 RBP=ffff8880164f7920 RSP=ffff8880164f7858 R8 =ffffffff8613751e R9 =ffff8880164f7908 R10=0000000000038001 R11=0000000000020d8a R12=ffff8880164f7990 R13=ffff8880164f7910 R14=ffff888015a29b40 R15=ffff8880164f78c8 RIP=ffffffff81130641 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 00007f34b57e8900 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=00007f34b5d9f618 CR3=00000000103ea000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=00007f5dfb542fe0 CR3=000000000c620000 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=9959338c09e045ab3e4f2166d88a9eac XMM02=ec2efd57dc4c00df000000000011cb90 XMM03=40fe660d4a606c7b000000000011cc60 XMM04=6b818311b44d851a00000000000ae988 XMM05=cb17e201b5a8fa080000000000134700 XMM06=c291bd5c70af25b90000000000133b28 XMM07=e042d86d42eb936e00000000001243c0 XMM08=40fe660d4a606c7b000000000011cc60 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000