syzkaller login: [ 31.130807] BUG: Bad rss-counter state mm:00000000a8c6d373 type:MM_FILEPAGES val:33 [ 31.132397] BUG: Bad rss-counter state mm:00000000a8c6d373 type:MM_ANONPAGES val:22 [ 31.295875] ================================================================== [ 31.296778] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.297707] Read of size 8 at addr ffff88800e6bea50 by task sshd/221 [ 31.298579] [ 31.298811] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.299673] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.300666] Call Trace: [ 31.300991] [ 31.301275] dump_stack_lvl+0x91/0xf0 [ 31.301763] print_report+0xcc/0x620 [ 31.302254] ? __virt_addr_valid+0x102/0x340 [ 31.302835] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.303456] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.304074] kasan_report+0xbe/0xf0 [ 31.304554] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.305177] vma_interval_tree_remove+0xc75/0xec0 [ 31.305790] vma_prepare+0xc54/0x11a0 [ 31.306268] __split_vma+0x5af/0x950 [ 31.306749] ? __pfx___split_vma+0x10/0x10 [ 31.307278] ? find_held_lock+0x2c/0x110 [ 31.307797] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.308362] ? lock_is_held_type+0x9f/0x120 [ 31.308905] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.309512] ? mtree_range_walk+0x632/0x900 [ 31.310062] ? mas_walk+0x5c7/0x7c0 [ 31.310534] do_vmi_munmap+0x1f1/0x2b0 [ 31.311042] mmap_region+0x1f9/0x2660 [ 31.311526] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.312039] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.312766] ? __pfx_lock_acquire+0x10/0x10 [ 31.313299] ? __pfx_mmap_region+0x10/0x10 [ 31.313831] ? security_mmap_addr+0x7d/0xa0 [ 31.314361] ? get_unmapped_area+0x1f5/0x3f0 [ 31.314936] do_mmap+0x854/0xf00 [ 31.315377] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.315874] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.316435] ksys_mmap_pgoff+0x3af/0x500 [ 31.316945] do_syscall_64+0x3f/0x90 [ 31.317428] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.318079] RIP: 0033:0x7f88b281cd82 [ 31.318543] 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 [ 31.320687] RSP: 002b:00007ffff7b59e28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.321589] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f88b281cd82 [ 31.322433] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f88b1c56000 [ 31.323301] RBP: 00007f88b1c56000 R08: 0000000000000009 R09: 0000000000001000 [ 31.324144] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f15cb29ec0 [ 31.325003] R13: 00007ffff7b59e40 R14: 00007ffff7b59e70 R15: 00007ffff7b5a1d0 [ 31.325857] [ 31.326150] [ 31.326367] Allocated by task 214: [ 31.326824] kasan_save_stack+0x22/0x50 [ 31.327332] kasan_set_track+0x25/0x30 [ 31.327829] __kasan_slab_alloc+0x59/0x70 [ 31.328351] kmem_cache_alloc+0x16b/0x370 [ 31.328874] vm_area_dup+0x20/0x160 [ 31.329328] __split_vma+0x170/0x950 [ 31.329802] split_vma+0xc6/0x110 [ 31.330246] mprotect_fixup+0x8d2/0xb30 [ 31.330757] do_mprotect_pkey+0x87e/0xd40 [ 31.331279] __x64_sys_mprotect+0x78/0xc0 [ 31.331814] do_syscall_64+0x3f/0x90 [ 31.332289] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.332929] [ 31.333147] Freed by task 214: [ 31.333532] kasan_save_stack+0x22/0x50 [ 31.334041] kasan_set_track+0x25/0x30 [ 31.334534] kasan_save_free_info+0x2b/0x50 [ 31.335082] __kasan_slab_free+0x10a/0x190 [ 31.335619] kmem_cache_free+0x10d/0x4d0 [ 31.336127] rcu_core+0x8c8/0x2860 [ 31.336568] __do_softirq+0x1b7/0x7d4 [ 31.337041] [ 31.337256] Last potentially related work creation: [ 31.337840] kasan_save_stack+0x22/0x50 [ 31.338338] __kasan_record_aux_stack+0x8e/0xa0 [ 31.338921] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.339569] remove_vma+0x139/0x170 [ 31.340017] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.340571] do_vmi_munmap+0x1f1/0x2b0 [ 31.341053] __vm_munmap+0x138/0x3a0 [ 31.341526] __x64_sys_munmap+0x59/0x80 [ 31.342023] do_syscall_64+0x3f/0x90 [ 31.342496] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.343146] [ 31.343363] The buggy address belongs to the object at ffff88800e6be9f8 [ 31.343363] which belongs to the cache vm_area_struct of size 168 [ 31.344829] The buggy address is located 88 bytes inside of [ 31.344829] freed 168-byte region [ffff88800e6be9f8, ffff88800e6beaa0) [ 31.346223] [ 31.346441] The buggy address belongs to the physical page: [ 31.347117] page:0000000033868eda refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe6be [ 31.348201] memcg:ffff88800c502a01 [ 31.348629] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.349342] page_type: 0xffffffff() [ 31.349801] raw: 0100000000000200 ffff88800879fc80 ffffea00003ae600 dead000000000005 [ 31.350747] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c502a01 [ 31.351662] page dumped because: kasan: bad access detected [ 31.352336] [ 31.352552] Memory state around the buggy address: [ 31.353140] ffff88800e6be900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.354001] ffff88800e6be980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.354880] >ffff88800e6bea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.355746] ^ [ 31.356444] ffff88800e6bea80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.357305] ffff88800e6beb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.358149] ================================================================== [ 31.359129] Disabling lock debugging due to kernel taint [ 33.827721] BUG: Bad rss-counter state mm:000000000ca2a9fe type:MM_FILEPAGES val:33 [ 33.828964] BUG: Bad rss-counter state mm:000000000ca2a9fe type:MM_ANONPAGES val:22 [ 34.268304] BUG: Bad rss-counter state mm:00000000a94a872f type:MM_FILEPAGES val:33 [ 34.269292] BUG: Bad rss-counter state mm:00000000a94a872f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45392' (ECDSA) to the list of known hosts. 2023/06/19 19:46:26 fuzzer started 2023/06/19 19:46:26 dialing manager at localhost:44161 2023/06/19 19:46:26 checking machine... 2023/06/19 19:46:26 checking revisions... [ 34.997770] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:46:26 testing simple program... [ 35.050350] cgroup: Unknown subsys name 'net' [ 35.102482] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:46:25 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=ffffffff86137501 RDX=1ffff1100287ee4c RSI=ffffffff8180cd09 RDI=ffff8880143f72d0 RBP=ffff8880143f72a0 RSP=ffff8880143f71f8 R8 =ffffffff86137542 R9 =ffff8880143f7248 R10=0000000000038001 R11=0000000000020d8a R12=ffff8880143f72d0 R13=0000000000000000 R14=ffff8880143f8000 R15=0000000000092cc0 RIP=ffffffff813ad42f 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 00007f17a5b34900 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=00007fd93d445650 CR3=000000001362a000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=f99ab72f9d7c3cc600000000000ae988 XMM05=b223cdbbb23ff77100000000001356b0 XMM06=00c3ffa147b8d85700000000001344a0 XMM07=fb795ef6d65770560000000000124a08 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf395c0 RCX=1ffff110011ae382 RDX=dffffc0000000000 RSI=ffff888015a4b700 RDI=ffff888008d71c10 RBP=ffff888008d71bc0 RSP=ffff888015c8fd10 R8 =ffff888015a4b750 R9 =ffffed1002b91fa7 R10=0000000000000003 R11=00000000000b6996 R12=ffff888008d71bc0 R13=ffff888008d71bd0 R14=0000000000000000 R15=ffff888015c8fe00 RIP=ffffffff812518f8 RFL=00000086 [--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 00007fd93ce90900 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=00007fd93d447618 CR3=000000001a88c000 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=563412feff00545000000000000080fe 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