syzkaller login: [ 39.828723] BUG: Bad rss-counter state mm:00000000c08dd4af type:MM_FILEPAGES val:33 [ 39.830688] BUG: Bad rss-counter state mm:00000000c08dd4af type:MM_ANONPAGES val:22 [ 39.988820] ================================================================== [ 39.989715] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.990649] Read of size 8 at addr ffff88800ede95c8 by task sshd/220 [ 39.991411] [ 39.991631] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.992668] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.993631] Call Trace: [ 39.993955] [ 39.994236] dump_stack_lvl+0x91/0xf0 [ 39.994759] print_report+0xcc/0x620 [ 39.995235] ? __virt_addr_valid+0x102/0x340 [ 39.995781] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.996386] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.996996] kasan_report+0xbe/0xf0 [ 39.997464] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.998077] vma_interval_tree_remove+0xc75/0xec0 [ 39.998689] vma_prepare+0xc54/0x11a0 [ 39.999175] __split_vma+0x5af/0x950 [ 39.999644] ? __pfx___split_vma+0x10/0x10 [ 40.000171] ? find_held_lock+0x2c/0x110 [ 40.000687] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.001245] ? lock_is_held_type+0x9f/0x120 [ 40.001776] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.002411] ? mtree_range_walk+0x632/0x900 [ 40.002957] ? mas_walk+0x5c7/0x7c0 [ 40.003429] do_vmi_munmap+0x1f1/0x2b0 [ 40.003937] mmap_region+0x1f9/0x2660 [ 40.004419] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.004936] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.005649] ? __pfx_lock_acquire+0x10/0x10 [ 40.006184] ? __pfx_mmap_region+0x10/0x10 [ 40.006734] ? security_mmap_addr+0x7d/0xa0 [ 40.007262] ? get_unmapped_area+0x1f5/0x3f0 [ 40.007812] do_mmap+0x854/0xf00 [ 40.008249] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.008739] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.009295] ksys_mmap_pgoff+0x3af/0x500 [ 40.009806] do_syscall_64+0x3f/0x90 [ 40.010282] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.010933] RIP: 0033:0x7f87bce79d82 [ 40.011388] 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 [ 40.013490] RSP: 002b:00007ffcde53e938 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.014387] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f87bce79d82 [ 40.015251] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f87bc2b3000 [ 40.016097] RBP: 00007f87bc2b3000 R08: 0000000000000009 R09: 0000000000001000 [ 40.016934] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bfc098cec0 [ 40.017776] R13: 00007ffcde53e950 R14: 00007ffcde53e980 R15: 00007ffcde53ece0 [ 40.018630] [ 40.018919] [ 40.019133] Allocated by task 213: [ 40.019558] kasan_save_stack+0x22/0x50 [ 40.020056] kasan_set_track+0x25/0x30 [ 40.020545] __kasan_slab_alloc+0x59/0x70 [ 40.021068] kmem_cache_alloc+0x16b/0x370 [ 40.021577] vm_area_dup+0x20/0x160 [ 40.022030] __split_vma+0x170/0x950 [ 40.022497] split_vma+0xc6/0x110 [ 40.022933] mprotect_fixup+0x8d2/0xb30 [ 40.023434] do_mprotect_pkey+0x87e/0xd40 [ 40.023962] __x64_sys_mprotect+0x78/0xc0 [ 40.024480] do_syscall_64+0x3f/0x90 [ 40.024947] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.025584] [ 40.025798] Freed by task 213: [ 40.026185] kasan_save_stack+0x22/0x50 [ 40.026709] kasan_set_track+0x25/0x30 [ 40.027204] kasan_save_free_info+0x2b/0x50 [ 40.027733] __kasan_slab_free+0x10a/0x190 [ 40.028260] kmem_cache_free+0x10d/0x4d0 [ 40.028762] rcu_core+0x8c8/0x2860 [ 40.029205] __do_softirq+0x1b7/0x7d4 [ 40.029675] [ 40.029890] Last potentially related work creation: [ 40.030476] kasan_save_stack+0x22/0x50 [ 40.030975] __kasan_record_aux_stack+0x8e/0xa0 [ 40.031540] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.032175] remove_vma+0x139/0x170 [ 40.032621] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.033253] do_vmi_munmap+0x1f1/0x2b0 [ 40.033739] __vm_munmap+0x138/0x3a0 [ 40.034203] __x64_sys_munmap+0x59/0x80 [ 40.034711] do_syscall_64+0x3f/0x90 [ 40.035184] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.035820] [ 40.036032] The buggy address belongs to the object at ffff88800ede9570 [ 40.036032] which belongs to the cache vm_area_struct of size 168 [ 40.037493] The buggy address is located 88 bytes inside of [ 40.037493] freed 168-byte region [ffff88800ede9570, ffff88800ede9618) [ 40.038905] [ 40.039120] The buggy address belongs to the physical page: [ 40.039782] page:000000006e663db9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xede9 [ 40.040863] memcg:ffff88800cb90801 [ 40.041287] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.041929] page_type: 0xffffffff() [ 40.042374] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 40.043289] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cb90801 [ 40.044196] page dumped because: kasan: bad access detected [ 40.044855] [ 40.045068] Memory state around the buggy address: [ 40.045643] ffff88800ede9480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.046514] ffff88800ede9500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 40.047366] >ffff88800ede9580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.048218] ^ [ 40.048878] ffff88800ede9600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 40.049732] ffff88800ede9680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.050585] ================================================================== [ 40.051706] Disabling lock debugging due to kernel taint [ 42.197788] BUG: Bad rss-counter state mm:000000002dad71ae type:MM_FILEPAGES val:33 [ 42.198976] BUG: Bad rss-counter state mm:000000002dad71ae type:MM_ANONPAGES val:22 [ 42.587056] BUG: Bad rss-counter state mm:0000000013a89d81 type:MM_FILEPAGES val:33 [ 42.588149] BUG: Bad rss-counter state mm:0000000013a89d81 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38603' (ECDSA) to the list of known hosts. 2023/06/19 16:06:16 fuzzer started 2023/06/19 16:06:16 dialing manager at localhost:44161 2023/06/19 16:06:16 checking machine... 2023/06/19 16:06:16 checking revisions... [ 43.332017] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:06:17 testing simple program... [ 43.382391] cgroup: Unknown subsys name 'net' [ 43.415560] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:06:15 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffed1001de6f57 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000000 RSP=ffff88800ef37aa8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8fe1 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 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=00007f676f552260 CR3=000000000c616000 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=756e696c2d34365f3638782f62696c2f XMM01=6c69747579656b62696c2f756e672d78 XMM02=00312e6f732e736c69747579656b6269 XMM03=6c2f756e672d78756e696c2d34365f36 XMM04=00000000000000000000000000000000 XMM05=00007f676fa8ef6000007f676f871f30 XMM06=00007f676f871a2000007f676f871510 XMM07=00007f676f87100000007f676fa8fa20 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800f0877d0 RCX=ffffffff86137501 RDX=1ffff11001e10efc RSI=ffffffff8180c585 RDI=ffff88800f0877e0 RBP=ffff88800f0877a0 RSP=ffff88800f0876e8 R8 =ffffffff8613751e R9 =ffff88800f087748 R10=0000000000038001 R11=0000000000020d8a R12=ffff88800f0877d0 R13=0000000000000000 R14=ffff888015b1d1c0 R15=0000000000082cc0 RIP=ffffffff813ad446 RFL=00000296 [--S-AP-] 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 00007f97e194d900 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=00007ffdd4709000 CR3=000000000ed18000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000