syzkaller login: [ 31.063680] BUG: Bad rss-counter state mm:00000000d38e2853 type:MM_FILEPAGES val:33 [ 31.064698] BUG: Bad rss-counter state mm:00000000d38e2853 type:MM_ANONPAGES val:22 [ 31.235171] ================================================================== [ 31.236163] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.237165] Read of size 8 at addr ffff88801a10cb38 by task sshd/219 [ 31.238152] [ 31.238417] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.239337] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.240410] Call Trace: [ 31.240758] [ 31.241065] dump_stack_lvl+0x91/0xf0 [ 31.241618] print_report+0xcc/0x620 [ 31.242140] ? __virt_addr_valid+0x102/0x340 [ 31.242727] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.243395] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.244057] kasan_report+0xbe/0xf0 [ 31.244568] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.245243] vma_interval_tree_remove+0xc75/0xec0 [ 31.245914] vma_prepare+0xc54/0x11a0 [ 31.246443] __split_vma+0x5af/0x950 [ 31.246961] ? __pfx___split_vma+0x10/0x10 [ 31.247542] ? find_held_lock+0x2c/0x110 [ 31.248114] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.248737] ? lock_is_held_type+0x9f/0x120 [ 31.249332] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.250029] ? mtree_range_walk+0x632/0x900 [ 31.250639] ? mas_walk+0x5c7/0x7c0 [ 31.251163] do_vmi_munmap+0x1f1/0x2b0 [ 31.251711] mmap_region+0x1f9/0x2660 [ 31.252248] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.252813] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.253618] ? __pfx_lock_acquire+0x10/0x10 [ 31.254213] ? __pfx_mmap_region+0x10/0x10 [ 31.254792] ? security_mmap_addr+0x7d/0xa0 [ 31.255379] ? get_unmapped_area+0x1f5/0x3f0 [ 31.255990] do_mmap+0x854/0xf00 [ 31.256470] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.257019] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.257647] ksys_mmap_pgoff+0x3af/0x500 [ 31.258205] do_syscall_64+0x3f/0x90 [ 31.258734] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.259453] RIP: 0033:0x7fd93bf2fd82 [ 31.259964] 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 [ 31.262355] RSP: 002b:00007ffcec6ed448 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.263353] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd93bf2fd82 [ 31.264289] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd93b369000 [ 31.265229] RBP: 00007fd93b369000 R08: 0000000000000009 R09: 0000000000001000 [ 31.266166] R10: 0000000000000812 R11: 0000000000000206 R12: 000056298937dec0 [ 31.267106] R13: 00007ffcec6ed460 R14: 00007ffcec6ed490 R15: 00007ffcec6ed7f0 [ 31.268055] [ 31.268377] [ 31.268614] Allocated by task 212: [ 31.269081] kasan_save_stack+0x22/0x50 [ 31.269643] kasan_set_track+0x25/0x30 [ 31.270194] __kasan_slab_alloc+0x59/0x70 [ 31.270769] kmem_cache_alloc+0x16b/0x370 [ 31.271338] vm_area_dup+0x20/0x160 [ 31.271838] __split_vma+0x170/0x950 [ 31.272354] split_vma+0xc6/0x110 [ 31.272840] mprotect_fixup+0x8d2/0xb30 [ 31.273416] do_mprotect_pkey+0x87e/0xd40 [ 31.273999] __x64_sys_mprotect+0x78/0xc0 [ 31.274580] do_syscall_64+0x3f/0x90 [ 31.275103] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.275806] [ 31.276046] Freed by task 212: [ 31.276482] kasan_save_stack+0x22/0x50 [ 31.277044] kasan_set_track+0x25/0x30 [ 31.277601] kasan_save_free_info+0x2b/0x50 [ 31.278196] __kasan_slab_free+0x10a/0x190 [ 31.278778] kmem_cache_free+0x10d/0x4d0 [ 31.279428] rcu_core+0x8c8/0x2860 [ 31.279926] __do_softirq+0x1b7/0x7d4 [ 31.280452] [ 31.280691] Last potentially related work creation: [ 31.281339] kasan_save_stack+0x22/0x50 [ 31.281926] __kasan_record_aux_stack+0x8e/0xa0 [ 31.282567] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.283285] remove_vma+0x139/0x170 [ 31.283786] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.284411] do_vmi_munmap+0x1f1/0x2b0 [ 31.284939] __vm_munmap+0x138/0x3a0 [ 31.285465] __x64_sys_munmap+0x59/0x80 [ 31.286017] do_syscall_64+0x3f/0x90 [ 31.286547] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.287259] [ 31.287496] The buggy address belongs to the object at ffff88801a10cae0 [ 31.287496] which belongs to the cache vm_area_struct of size 168 [ 31.289146] The buggy address is located 88 bytes inside of [ 31.289146] freed 168-byte region [ffff88801a10cae0, ffff88801a10cb88) [ 31.290715] [ 31.290957] The buggy address belongs to the physical page: [ 31.291686] page:00000000b62e7436 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a10c [ 31.292894] memcg:ffff88800e9e6501 [ 31.293369] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.294109] page_type: 0xffffffff() [ 31.294606] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.295627] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e9e6501 [ 31.296610] page dumped because: kasan: bad access detected [ 31.297337] [ 31.297578] Memory state around the buggy address: [ 31.298206] ffff88801a10ca00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.299151] ffff88801a10ca80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.300075] >ffff88801a10cb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.301000] ^ [ 31.301673] ffff88801a10cb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.302602] ffff88801a10cc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.303530] ================================================================== [ 31.304559] Disabling lock debugging due to kernel taint [ 33.648443] BUG: Bad rss-counter state mm:0000000043c12e0a type:MM_FILEPAGES val:33 [ 33.649586] BUG: Bad rss-counter state mm:0000000043c12e0a type:MM_ANONPAGES val:22 [ 34.121152] BUG: Bad rss-counter state mm:00000000cf0fe81d type:MM_FILEPAGES val:33 [ 34.122155] BUG: Bad rss-counter state mm:00000000cf0fe81d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6109' (ECDSA) to the list of known hosts. 2023/06/21 02:08:19 fuzzer started 2023/06/21 02:08:19 dialing manager at localhost:36067 2023/06/21 02:08:19 checking machine... 2023/06/21 02:08:19 checking revisions... [ 34.765830] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:08:19 testing simple program... [ 34.815514] cgroup: Unknown subsys name 'net' [ 34.852805] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:08:19 Registers: info registers vcpu 0 RAX=0000000080000001 RBX=ffff88800e95ead8 RCX=0000000000000000 RDX=ffff88801034d1c0 RSI=ffffffff83868bf8 RDI=ffffffff85d3d350 RBP=ffff88801753fc48 RSP=ffff88801753fb20 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=1ffff11001d2bd5b R13=00000000000000e4 R14=ffff888008fe8000 R15=ffff88800e95ea00 RIP=ffffffff814c086b RFL=00000082 [--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 00007f0d4ed85900 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=00007f0d4f33c618 CR3=000000000e2b4000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007faca6020dd0 CR3=000000000c642000 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=02caf59dee986e97d343aaedd4260936 XMM02=000000000011b310ec2efd57dc4c00df XMM03=0000000000121fe0a8d8dc0f9c2eb5bc XMM04=8ad00634c2e4d4a900000000000ae988 XMM05=16a3b719580990070000000000132ca0 XMM06=806171799158d9670000000000131d40 XMM07=e042d86d42eb936e0000000000122260 XMM08=a8d8dc0f9c2eb5bc000000000011b370 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000