syzkaller login: [ 33.860929] BUG: Bad rss-counter state mm:0000000017cdd431 type:MM_FILEPAGES val:33 [ 33.861992] BUG: Bad rss-counter state mm:0000000017cdd431 type:MM_ANONPAGES val:22 [ 34.028472] ================================================================== [ 34.029431] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.030414] Read of size 8 at addr ffff888019ebed08 by task sshd/220 [ 34.031354] [ 34.031584] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.032501] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.033559] Call Trace: [ 34.033895] [ 34.034210] dump_stack_lvl+0x91/0xf0 [ 34.034726] print_report+0xcc/0x620 [ 34.035238] ? __virt_addr_valid+0x102/0x340 [ 34.035840] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.036492] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.037138] kasan_report+0xbe/0xf0 [ 34.037641] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.038305] vma_interval_tree_remove+0xc75/0xec0 [ 34.038953] vma_prepare+0xc54/0x11a0 [ 34.039512] __split_vma+0x5af/0x950 [ 34.040055] ? __pfx___split_vma+0x10/0x10 [ 34.040635] ? find_held_lock+0x2c/0x110 [ 34.041201] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.041820] ? lock_is_held_type+0x9f/0x120 [ 34.042414] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.043064] ? mtree_range_walk+0x632/0x900 [ 34.043685] ? mas_walk+0x5c7/0x7c0 [ 34.044210] do_vmi_munmap+0x1f1/0x2b0 [ 34.044758] mmap_region+0x1f9/0x2660 [ 34.045298] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.045869] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.046662] ? __pfx_lock_acquire+0x10/0x10 [ 34.047259] ? __pfx_mmap_region+0x10/0x10 [ 34.047864] ? security_mmap_addr+0x7d/0xa0 [ 34.048457] ? get_unmapped_area+0x1f5/0x3f0 [ 34.049067] do_mmap+0x854/0xf00 [ 34.049553] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.050104] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.050725] ksys_mmap_pgoff+0x3af/0x500 [ 34.051286] do_syscall_64+0x3f/0x90 [ 34.051819] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.052535] RIP: 0033:0x7f6b19a41d82 [ 34.053043] 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 [ 34.055399] RSP: 002b:00007ffdca92b598 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.056414] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6b19a41d82 [ 34.057354] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6b18e7b000 [ 34.058292] RBP: 00007f6b18e7b000 R08: 0000000000000009 R09: 0000000000001000 [ 34.059228] R10: 0000000000000812 R11: 0000000000000206 R12: 000056429a67eec0 [ 34.060186] R13: 00007ffdca92b5b0 R14: 00007ffdca92b5e0 R15: 00007ffdca92b940 [ 34.061142] [ 34.061465] [ 34.061701] Allocated by task 213: [ 34.062177] kasan_save_stack+0x22/0x50 [ 34.062740] kasan_set_track+0x25/0x30 [ 34.063286] __kasan_slab_alloc+0x59/0x70 [ 34.063877] kmem_cache_alloc+0x16b/0x370 [ 34.064450] vm_area_dup+0x20/0x160 [ 34.064954] __split_vma+0x170/0x950 [ 34.065472] split_vma+0xc6/0x110 [ 34.065958] mprotect_fixup+0x8d2/0xb30 [ 34.066514] do_mprotect_pkey+0x87e/0xd40 [ 34.067091] __x64_sys_mprotect+0x78/0xc0 [ 34.067674] do_syscall_64+0x3f/0x90 [ 34.068200] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.068908] [ 34.069145] Freed by task 213: [ 34.069585] kasan_save_stack+0x22/0x50 [ 34.070148] kasan_set_track+0x25/0x30 [ 34.070697] kasan_save_free_info+0x2b/0x50 [ 34.071291] __kasan_slab_free+0x10a/0x190 [ 34.071904] kmem_cache_free+0x10d/0x4d0 [ 34.072537] rcu_core+0x8c8/0x2860 [ 34.073030] __do_softirq+0x1b7/0x7d4 [ 34.073558] [ 34.073799] Last potentially related work creation: [ 34.074453] kasan_save_stack+0x22/0x50 [ 34.075010] __kasan_record_aux_stack+0x8e/0xa0 [ 34.075657] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.076369] remove_vma+0x139/0x170 [ 34.076871] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.077489] do_vmi_munmap+0x1f1/0x2b0 [ 34.078033] __vm_munmap+0x138/0x3a0 [ 34.078551] __x64_sys_munmap+0x59/0x80 [ 34.079103] do_syscall_64+0x3f/0x90 [ 34.079629] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.080343] [ 34.080580] The buggy address belongs to the object at ffff888019ebecb0 [ 34.080580] which belongs to the cache vm_area_struct of size 168 [ 34.082217] The buggy address is located 88 bytes inside of [ 34.082217] freed 168-byte region [ffff888019ebecb0, ffff888019ebed58) [ 34.083794] [ 34.084035] The buggy address belongs to the physical page: [ 34.084769] page:00000000fdc07576 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19ebe [ 34.085987] memcg:ffff88800e1dd401 [ 34.086462] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 34.087240] page_type: 0xffffffff() [ 34.087748] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 34.088770] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e1dd401 [ 34.089778] page dumped because: kasan: bad access detected [ 34.090516] [ 34.090753] Memory state around the buggy address: [ 34.091396] ffff888019ebec00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 34.092367] ffff888019ebec80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 34.093317] >ffff888019ebed00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 34.094266] ^ [ 34.094756] ffff888019ebed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 34.095713] ffff888019ebee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 34.096654] ================================================================== [ 34.097806] Disabling lock debugging due to kernel taint [ 35.944825] BUG: Bad rss-counter state mm:0000000092819bb6 type:MM_FILEPAGES val:33 [ 35.945870] BUG: Bad rss-counter state mm:0000000092819bb6 type:MM_ANONPAGES val:22 [ 36.496309] BUG: Bad rss-counter state mm:00000000d60f9d61 type:MM_FILEPAGES val:33 [ 36.497571] BUG: Bad rss-counter state mm:00000000d60f9d61 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52461' (ECDSA) to the list of known hosts. 2023/06/20 09:39:36 fuzzer started 2023/06/20 09:39:36 dialing manager at localhost:44161 2023/06/20 09:39:36 checking machine... 2023/06/20 09:39:36 checking revisions... [ 37.199714] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:39:36 testing simple program... [ 37.247304] cgroup: Unknown subsys name 'net' [ 37.297211] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:39:33 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888018c8d1c0 RCX=0000000000000000 RDX=1ffff11003191c77 RSI=ffffffff814e621f RDI=ffff888018c8e3b8 RBP=ffff88801670e5c0 RSP=ffff88806ce09da8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=ffff88806ce09ff8 R12=000000000d579245 R13=000000000ec53efb R14=ffff88801c9977d8 R15=dffffc0000000000 RIP=ffffffff814e623e 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 00007f1152609900 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=00007f1152bc0618 CR3=000000000951c000 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=00007f3149c34a00 CR3=000000000f33e000 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=46bb3c9dcf93bdb79e4e79a1ec75b09a XMM02=2c67c8bc2e329bc3000000000011fa80 XMM03=fb795ef6d65770560000000000124220 XMM04=2b7415762018ff5300000000000ae988 XMM05=19e9129bd510f2350000000000133d08 XMM06=6df5644e28facb330000000000132b70 XMM07=e042d86d42eb936e00000000001244a0 XMM08=ad48ba3c583c9e8f000000000011fae0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000