syzkaller login: [ 28.885128] BUG: Bad rss-counter state mm:00000000fcb7bf61 type:MM_FILEPAGES val:33 [ 28.886337] BUG: Bad rss-counter state mm:00000000fcb7bf61 type:MM_ANONPAGES val:22 [ 28.927397] ================================================================== [ 28.928390] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.929397] Read of size 8 at addr ffff88800ee6a798 by task sshd/220 [ 28.930255] [ 28.930492] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.931433] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.932486] Call Trace: [ 28.932835] [ 28.933144] dump_stack_lvl+0x91/0xf0 [ 28.933693] print_report+0xcc/0x620 [ 28.934215] ? __virt_addr_valid+0x102/0x340 [ 28.934810] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.935480] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.936150] kasan_report+0xbe/0xf0 [ 28.936668] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.937347] vma_interval_tree_remove+0xc75/0xec0 [ 28.938020] vma_prepare+0xc54/0x11a0 [ 28.938540] __split_vma+0x5af/0x950 [ 28.939050] ? __pfx___split_vma+0x10/0x10 [ 28.939625] ? find_held_lock+0x2c/0x110 [ 28.940190] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.940802] ? lock_is_held_type+0x9f/0x120 [ 28.941386] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.942059] ? mtree_range_walk+0x632/0x900 [ 28.942669] ? mas_walk+0x5c7/0x7c0 [ 28.943185] do_vmi_munmap+0x1f1/0x2b0 [ 28.943711] mmap_region+0x1f9/0x2660 [ 28.944233] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.944778] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.945543] ? __pfx_lock_acquire+0x10/0x10 [ 28.946117] ? __pfx_mmap_region+0x10/0x10 [ 28.946682] ? security_mmap_addr+0x7d/0xa0 [ 28.947254] ? get_unmapped_area+0x1f5/0x3f0 [ 28.947843] do_mmap+0x854/0xf00 [ 28.948323] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.948854] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.949457] ksys_mmap_pgoff+0x3af/0x500 [ 28.950027] do_syscall_64+0x3f/0x90 [ 28.950546] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.951244] RIP: 0033:0x7f8d3ffc8d82 [ 28.951738] 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 [ 28.954143] RSP: 002b:00007ffc114abf28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.955127] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8d3ffc8d82 [ 28.956027] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8d3f402000 [ 28.956907] RBP: 00007f8d3f402000 R08: 0000000000000009 R09: 0000000000001000 [ 28.957766] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ed8478ff70 [ 28.958602] R13: 00007ffc114abf40 R14: 00007ffc114abf70 R15: 00007ffc114ac2d0 [ 28.959457] [ 28.959755] [ 28.959976] Allocated by task 212: [ 28.960407] kasan_save_stack+0x22/0x50 [ 28.960912] kasan_set_track+0x25/0x30 [ 28.961409] __kasan_slab_alloc+0x59/0x70 [ 28.961939] kmem_cache_alloc+0x16b/0x370 [ 28.962451] vm_area_dup+0x20/0x160 [ 28.962898] __split_vma+0x170/0x950 [ 28.963359] split_vma+0xc6/0x110 [ 28.963794] mprotect_fixup+0x8d2/0xb30 [ 28.964298] do_mprotect_pkey+0x87e/0xd40 [ 28.964813] __x64_sys_mprotect+0x78/0xc0 [ 28.965344] do_syscall_64+0x3f/0x90 [ 28.965831] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.966471] [ 28.966687] Freed by task 212: [ 28.967113] kasan_save_stack+0x22/0x50 [ 28.967643] kasan_set_track+0x25/0x30 [ 28.968166] kasan_save_free_info+0x2b/0x50 [ 28.968696] __kasan_slab_free+0x10a/0x190 [ 28.969221] kmem_cache_free+0x10d/0x4d0 [ 28.969790] rcu_core+0x8c8/0x2860 [ 28.970237] __do_softirq+0x1b7/0x7d4 [ 28.970708] [ 28.970929] Last potentially related work creation: [ 28.971515] kasan_save_stack+0x22/0x50 [ 28.972055] __kasan_record_aux_stack+0x8e/0xa0 [ 28.972668] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.973359] remove_vma+0x139/0x170 [ 28.973853] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.974453] do_vmi_munmap+0x1f1/0x2b0 [ 28.974982] __vm_munmap+0x138/0x3a0 [ 28.975486] __x64_sys_munmap+0x59/0x80 [ 28.976021] do_syscall_64+0x3f/0x90 [ 28.976571] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.977283] [ 28.977535] The buggy address belongs to the object at ffff88800ee6a740 [ 28.977535] which belongs to the cache vm_area_struct of size 168 [ 28.979185] The buggy address is located 88 bytes inside of [ 28.979185] freed 168-byte region [ffff88800ee6a740, ffff88800ee6a7e8) [ 28.980752] [ 28.980992] The buggy address belongs to the physical page: [ 28.981769] page:00000000fe8054db refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee6a [ 28.982971] memcg:ffff888019fa5d01 [ 28.983444] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.984196] page_type: 0xffffffff() [ 28.984708] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.985769] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019fa5d01 [ 28.986798] page dumped because: kasan: bad access detected [ 28.987534] [ 28.987774] Memory state around the buggy address: [ 28.988446] ffff88800ee6a680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.989456] ffff88800ee6a700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 28.990459] >ffff88800ee6a780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 28.991401] ^ [ 28.991973] ffff88800ee6a800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 28.992979] ffff88800ee6a880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 28.994013] ================================================================== [ 28.995305] Disabling lock debugging due to kernel taint [ 30.955836] BUG: Bad rss-counter state mm:000000001060a3e6 type:MM_FILEPAGES val:33 [ 30.957029] BUG: Bad rss-counter state mm:000000001060a3e6 type:MM_ANONPAGES val:22 [ 31.344298] BUG: Bad rss-counter state mm:0000000014b693f2 type:MM_FILEPAGES val:33 [ 31.345470] BUG: Bad rss-counter state mm:0000000014b693f2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39408' (ECDSA) to the list of known hosts. 2023/06/20 19:00:47 fuzzer started 2023/06/20 19:00:47 dialing manager at localhost:36067 2023/06/20 19:00:47 checking machine... 2023/06/20 19:00:47 checking revisions... [ 32.055668] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:00:47 testing simple program... [ 32.093080] cgroup: Unknown subsys name 'net' [ 32.142366] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:00:47 Registers: info registers vcpu 0 RAX=0000000000038000 RBX=0000000000000001 RCX=ffffffff8180ca59 RDX=dffffc0000000000 RSI=00000000000080ca RDI=ffff888008d9f958 RBP=ffff888008d9f9b0 RSP=ffff888008d9f8e8 R8 =ffffffff86139748 R9 =ffff888008d9f998 R10=0000000000038001 R11=0000000000020f03 R12=ffff888008d9f9b8 R13=ffff888008d9f9a0 R14=ffff888008d9f999 R15=ffff888008d9f958 RIP=ffffffff81130754 RFL=00000287 [--S--PC] 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=00007f7cee470650 CR3=0000000009fda000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=00000000000361a0 RCX=1ffff1100d9e6c39 RDX=dffffc0000000000 RSI=ffff88807ffdc000 RDI=ffffffff81839900 RBP=ffff88800e71e400 RSP=ffff88806cf09db8 R8 =ffff88806cf361a0 R9 =ffffffff87b6a200 R10=ffff88806cf361e8 R11=0000000000000000 R12=ffff88807ffdc000 R13=0000000000000005 R14=00000000ffffff78 R15=0000000000000000 RIP=ffffffff81839d72 RFL=00000046 [---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 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=00007f25d7584db0 CR3=000000000d5f6000 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=006ce14070aa1cad69422c825976a39d XMM02=2c67c8bc2e329bc3000000000011c800 XMM03=fb795ef6d65770560000000000120cb8 XMM04=4736b779895ecda700000000000ae988 XMM05=d036a897640873830000000000132138 XMM06=4fda316b135da52b00000000001311d8 XMM07=e042d86d42eb936e0000000000120f90 XMM08=fb613469651f8401000000000011c860 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000