Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 30.809988] BUG: Bad rss-counter state mm:00000000a07961c9 type:MM_FILEPAGES val:33 [ 30.811212] BUG: Bad rss-counter state mm:00000000a07961c9 type:MM_ANONPAGES val:22 [ 30.850576] ================================================================== [ 30.851477] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.852608] Read of size 8 at addr ffff88800dbceed8 by task sshd/219 [ 30.853373] [ 30.853589] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.854457] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.855425] Call Trace: [ 30.855743] [ 30.856027] dump_stack_lvl+0x91/0xf0 [ 30.856514] print_report+0xcc/0x620 [ 30.856996] ? __virt_addr_valid+0x102/0x340 [ 30.857537] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.858146] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.858783] kasan_report+0xbe/0xf0 [ 30.859253] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.859870] vma_interval_tree_remove+0xc75/0xec0 [ 30.860465] vma_prepare+0xc54/0x11a0 [ 30.860945] __split_vma+0x5af/0x950 [ 30.861417] ? __pfx___split_vma+0x10/0x10 [ 30.861938] ? find_held_lock+0x2c/0x110 [ 30.862457] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.863020] ? lock_is_held_type+0x9f/0x120 [ 30.863554] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.864161] ? mtree_range_walk+0x632/0x900 [ 30.864708] ? mas_walk+0x5c7/0x7c0 [ 30.865179] do_vmi_munmap+0x1f1/0x2b0 [ 30.865667] mmap_region+0x1f9/0x2660 [ 30.866145] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.866662] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.867371] ? __pfx_lock_acquire+0x10/0x10 [ 30.867902] ? __pfx_mmap_region+0x10/0x10 [ 30.868426] ? security_mmap_addr+0x7d/0xa0 [ 30.868958] ? get_unmapped_area+0x1f5/0x3f0 [ 30.869504] do_mmap+0x854/0xf00 [ 30.869941] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.870434] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.871011] ksys_mmap_pgoff+0x3af/0x500 [ 30.871519] do_syscall_64+0x3f/0x90 [ 30.871988] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.872630] RIP: 0033:0x7fcd55cd6d82 [ 30.873085] 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 [ 30.875213] RSP: 002b:00007fffdf5cbe68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.876113] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcd55cd6d82 [ 30.876951] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcd55110000 [ 30.877798] RBP: 00007fcd55110000 R08: 0000000000000009 R09: 0000000000001000 [ 30.878658] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c7331fdb20 [ 30.879503] R13: 00007fffdf5cbe80 R14: 00007fffdf5cbeb0 R15: 00007fffdf5cc210 [ 30.880356] [ 30.880645] [ 30.880858] Allocated by task 212: [ 30.881283] kasan_save_stack+0x22/0x50 [ 30.881784] kasan_set_track+0x25/0x30 [ 30.882281] __kasan_slab_alloc+0x59/0x70 [ 30.882809] kmem_cache_alloc+0x16b/0x370 [ 30.883325] vm_area_dup+0x20/0x160 [ 30.883775] __split_vma+0x170/0x950 [ 30.884240] split_vma+0xc6/0x110 [ 30.884675] mprotect_fixup+0x8d2/0xb30 [ 30.885175] do_mprotect_pkey+0x87e/0xd40 [ 30.885695] __x64_sys_mprotect+0x78/0xc0 [ 30.886210] do_syscall_64+0x3f/0x90 [ 30.886688] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.887330] [ 30.887543] Freed by task 212: [ 30.887932] kasan_save_stack+0x22/0x50 [ 30.888433] kasan_set_track+0x25/0x30 [ 30.888919] kasan_save_free_info+0x2b/0x50 [ 30.889448] __kasan_slab_free+0x10a/0x190 [ 30.889978] kmem_cache_free+0x10d/0x4d0 [ 30.890483] rcu_core+0x8c8/0x2860 [ 30.890944] __do_softirq+0x1b7/0x7d4 [ 30.891415] [ 30.891627] Last potentially related work creation: [ 30.892210] kasan_save_stack+0x22/0x50 [ 30.892719] __kasan_record_aux_stack+0x8e/0xa0 [ 30.893292] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.893935] remove_vma+0x139/0x170 [ 30.894385] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.894953] do_vmi_munmap+0x1f1/0x2b0 [ 30.895432] __vm_munmap+0x138/0x3a0 [ 30.895899] __x64_sys_munmap+0x59/0x80 [ 30.896392] do_syscall_64+0x3f/0x90 [ 30.896861] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.897503] [ 30.897721] The buggy address belongs to the object at ffff88800dbcee80 [ 30.897721] which belongs to the cache vm_area_struct of size 168 [ 30.899208] The buggy address is located 88 bytes inside of [ 30.899208] freed 168-byte region [ffff88800dbcee80, ffff88800dbcef28) [ 30.900598] [ 30.900811] The buggy address belongs to the physical page: [ 30.901469] page:00000000dc5d75a4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdbce [ 30.902549] memcg:ffff88800d9dec01 [ 30.902982] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.903676] page_type: 0xffffffff() [ 30.904122] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 30.905039] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d9dec01 [ 30.905942] page dumped because: kasan: bad access detected [ 30.906596] [ 30.906816] Memory state around the buggy address: [ 30.907395] ffff88800dbced80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.908247] ffff88800dbcee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.909099] >ffff88800dbcee80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.909948] ^ [ 30.910686] ffff88800dbcef00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.911540] ffff88800dbcef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.912382] ================================================================== [ 30.913553] Disabling lock debugging due to kernel taint [ 33.151649] BUG: Bad rss-counter state mm:00000000a7fef96f type:MM_FILEPAGES val:33 [ 33.152829] BUG: Bad rss-counter state mm:00000000a7fef96f type:MM_ANONPAGES val:22 [ 33.575243] BUG: Bad rss-counter state mm:00000000bda14aec type:MM_FILEPAGES val:33 [ 33.576238] BUG: Bad rss-counter state mm:00000000bda14aec type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29803' (ECDSA) to the list of known hosts. 2023/06/19 20:05:49 fuzzer started 2023/06/19 20:05:49 dialing manager at localhost:44161 2023/06/19 20:05:49 checking machine... 2023/06/19 20:05:49 checking revisions... [ 34.175270] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:05:49 testing simple program... [ 34.230945] cgroup: Unknown subsys name 'net' [ 34.302118] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:05:48 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=ffffffff85d9f1fc RCX=ffffffff811fc523 RDX=0000000000000000 RSI=ffffffff860ab102 RDI=ffffffff85d9f1f8 RBP=ffffffff85d9f1f8 RSP=ffff88801659f7b8 R8 =ffffffff860ab102 R9 =ffff88801659f8b0 R10=0000000000038001 R11=0000000000009789 R12=ffffffff85d9f204 R13=ffffffff85d9f1f8 R14=ffffffff85d9f1f8 R15=dffffc0000000000 RIP=ffffffff8112fc8c RFL=00000202 [-------] 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 00007f6e70174900 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=00007f6e7072b618 CR3=000000000d864000 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=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 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=00007f8bb484ca00 CR3=000000000d616000 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=e725ee0b6bee3dacb84edbc8aeabd9f4 XMM02=000000000011bc98eff9b2d0a8fce9cb XMM03=000000000011bd682c67c8bc2e329bc3 XMM04=b927409132dca9ed00000000000ae988 XMM05=2f814acaf041744d00000000001341f0 XMM06=806171799158d9670000000000132f20 XMM07=e042d86d42eb936e00000000001237a0 XMM08=eeef430b30d5cff7000000000011bd68 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000