[ 62.475927] BUG: Bad rss-counter state mm:00000000a1881f9a type:MM_FILEPAGES val:33 [ 62.476727] BUG: Bad rss-counter state mm:00000000a1881f9a type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 62.698024] ================================================================== [ 62.701408] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 62.702012] Read of size 8 at addr ffff88800e3fa880 by task sshd/222 [ 62.702499] [ 62.702639] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 62.703195] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 62.703819] Call Trace: [ 62.704026] [ 62.704222] dump_stack_lvl+0x91/0xf0 [ 62.704547] print_report+0xcc/0x620 [ 62.704860] ? __virt_addr_valid+0x102/0x340 [ 62.705214] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.705609] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.706013] kasan_report+0xbe/0xf0 [ 62.706319] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.706720] vma_interval_tree_remove+0xc75/0xec0 [ 62.707110] vma_prepare+0xc54/0x11a0 [ 62.707419] __split_vma+0x5af/0x950 [ 62.707723] ? __pfx___split_vma+0x10/0x10 [ 62.708073] ? find_held_lock+0x2c/0x110 [ 62.709526] do_vmi_align_munmap+0x2ba/0x11f0 [ 62.709900] ? lock_is_held_type+0x9f/0x120 [ 62.710309] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 62.710700] ? mtree_range_walk+0x632/0x900 [ 62.711060] ? mas_walk+0x5c7/0x7c0 [ 62.711419] do_vmi_munmap+0x1f1/0x2b0 [ 62.711738] mmap_region+0x1f9/0x2660 [ 62.712058] ? vm_mmap_pgoff+0x15c/0x3a0 [ 62.712628] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 62.713090] ? __pfx_lock_acquire+0x10/0x10 [ 62.713488] ? __pfx_mmap_region+0x10/0x10 [ 62.713831] ? security_mmap_addr+0x7d/0xa0 [ 62.714223] ? get_unmapped_area+0x1f5/0x3f0 [ 62.714582] do_mmap+0x854/0xf00 [ 62.714888] vm_mmap_pgoff+0x1a6/0x3a0 [ 62.715285] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 62.715650] ksys_mmap_pgoff+0x3af/0x500 [ 62.715978] do_syscall_64+0x3f/0x90 [ 62.721669] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.722102] RIP: 0033:0x7f4a09e75d82 [ 62.722455] 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 [ 62.723932] RSP: 002b:00007ffd9a49fe48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 62.725246] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4a09e75d82 [ 62.725800] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4a092af000 [ 62.726406] RBP: 00007f4a092af000 R08: 0000000000000009 R09: 0000000000001000 [ 62.726985] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564b6806eec0 [ 62.727590] R13: 00007ffd9a49fe60 R14: 00007ffd9a49fe90 R15: 00007ffd9a4a01f0 [ 62.728733] [ 62.728947] [ 62.729085] Allocated by task 214: [ 62.729412] kasan_save_stack+0x22/0x50 [ 62.729745] kasan_set_track+0x25/0x30 [ 62.730071] __kasan_slab_alloc+0x59/0x70 [ 62.730463] kmem_cache_alloc+0x16b/0x370 [ 62.730803] vm_area_dup+0x20/0x160 [ 62.731097] __split_vma+0x170/0x950 [ 62.731453] split_vma+0xc6/0x110 [ 62.731737] mprotect_fixup+0x8d2/0xb30 [ 62.732069] do_mprotect_pkey+0x87e/0xd40 [ 62.732509] __x64_sys_mprotect+0x78/0xc0 [ 62.732852] do_syscall_64+0x3f/0x90 [ 62.733157] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.733638] [ 62.733776] Freed by task 19: [ 62.734029] kasan_save_stack+0x22/0x50 [ 62.734409] kasan_set_track+0x25/0x30 [ 62.734731] kasan_save_free_info+0x2b/0x50 [ 62.735077] __kasan_slab_free+0x10a/0x190 [ 62.735472] kmem_cache_free+0x10d/0x4d0 [ 62.735798] rcu_core+0x8c8/0x2860 [ 62.736095] __do_softirq+0x1b7/0x7d4 [ 62.737091] [ 62.737288] Last potentially related work creation: [ 62.737662] kasan_save_stack+0x22/0x50 [ 62.737985] __kasan_record_aux_stack+0x8e/0xa0 [ 62.738403] __call_rcu_common.constprop.0+0x6a/0xb90 [ 62.738819] remove_vma+0x139/0x170 [ 62.739119] do_vmi_align_munmap+0xd4a/0x11f0 [ 62.739529] do_vmi_munmap+0x1f1/0x2b0 [ 62.739848] __vm_munmap+0x138/0x3a0 [ 62.740146] __x64_sys_munmap+0x59/0x80 [ 62.741019] do_syscall_64+0x3f/0x90 [ 62.741383] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.741798] [ 62.741938] The buggy address belongs to the object at ffff88800e3fa828 [ 62.741938] which belongs to the cache vm_area_struct of size 168 [ 62.742941] The buggy address is located 88 bytes inside of [ 62.742941] freed 168-byte region [ffff88800e3fa828, ffff88800e3fa8d0) [ 62.743896] [ 62.744036] The buggy address belongs to the physical page: [ 62.744578] page:00000000d2e7e7fc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe3fa [ 62.745346] memcg:ffff888009547101 [ 62.745623] flags: 0x100000000000200(slab|node=0|zone=1) [ 62.746038] page_type: 0xffffffff() [ 62.746381] raw: 0100000000000200 ffff88800879fc80 ffffea000037f480 dead000000000004 [ 62.746966] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009547101 [ 62.747592] page dumped because: kasan: bad access detected [ 62.748023] [ 62.748162] Memory state around the buggy address: [ 62.749162] ffff88800e3fa780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 62.749762] ffff88800e3fa800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 62.750371] >ffff88800e3fa880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 62.750916] ^ [ 62.751241] ffff88800e3fa900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 62.751790] ffff88800e3fa980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 62.753019] ================================================================== [ 62.772336] Disabling lock debugging due to kernel taint [ 66.810239] BUG: Bad rss-counter state mm:000000001f7607cb type:MM_FILEPAGES val:33 [ 66.810934] BUG: Bad rss-counter state mm:000000001f7607cb type:MM_ANONPAGES val:22 [ 67.594522] BUG: Bad rss-counter state mm:00000000bb332876 type:MM_FILEPAGES val:33 [ 67.595232] BUG: Bad rss-counter state mm:00000000bb332876 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43533' (ECDSA) to the list of known hosts. 2023/06/20 09:58:57 fuzzer started 2023/06/20 09:58:58 dialing manager at localhost:44161 2023/06/20 09:58:58 checking machine... 2023/06/20 09:58:58 checking revisions... 2023/06/20 09:58:58 testing simple program... [ 68.625437] kmemleak: Automatic memory scanning thread ended [ 68.694133] cgroup: Unknown subsys name 'net' [ 68.783270] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:58:55 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000046 [---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 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=00007f30ce799328 CR3=0000000005482000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 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=ffff888008c58400 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=00007fc099e9b480 CR3=000000000d9ee000 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=ff000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=085dc27f0c4f58f40000000000135b80 XMM05=d3fdd5f48436fbd700000000000aead0 XMM06=298cbf84f93d971d00000000000ae988 XMM07=a1fcdcf819d7e1e500000000000ae728 XMM08=44495f474f4c5359530069253d595449 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000