[ 31.146611] BUG: Bad rss-counter state mm:00000000ac69dc3c type:MM_FILEPAGES val:33 [ 31.147908] BUG: Bad rss-counter state mm:00000000ac69dc3c type:MM_ANONPAGES val:22 [ 31.184183] ================================================================== [ 31.185242] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.186324] Read of size 8 at addr ffff88801b852798 by task sshd/219 [ 31.187200] [ 31.187560] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.188480] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.189568] Call Trace: [ 31.189898] [ 31.190183] dump_stack_lvl+0x91/0xf0 [ 31.190687] print_report+0xcc/0x620 [ 31.191244] ? __virt_addr_valid+0x102/0x340 [ 31.191918] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.192542] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.193349] kasan_report+0xbe/0xf0 [ 31.193825] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.194444] vma_interval_tree_remove+0xc75/0xec0 [ 31.195047] vma_prepare+0xc54/0x11a0 [ 31.195528] __split_vma+0x5af/0x950 [ 31.196017] ? __pfx___split_vma+0x10/0x10 [ 31.196554] ? find_held_lock+0x2c/0x110 [ 31.197077] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.197653] ? lock_is_held_type+0x9f/0x120 [ 31.198191] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.198800] ? mtree_range_walk+0x632/0x900 [ 31.199356] ? mas_walk+0x5c7/0x7c0 [ 31.199839] do_vmi_munmap+0x1f1/0x2b0 [ 31.200338] mmap_region+0x1f9/0x2660 [ 31.200826] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.201339] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.202057] ? __pfx_lock_acquire+0x10/0x10 [ 31.202592] ? __pfx_mmap_region+0x10/0x10 [ 31.203134] ? security_mmap_addr+0x7d/0xa0 [ 31.203665] ? get_unmapped_area+0x1f5/0x3f0 [ 31.204244] do_mmap+0x854/0xf00 [ 31.204682] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.205179] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.205741] ksys_mmap_pgoff+0x3af/0x500 [ 31.206258] do_syscall_64+0x3f/0x90 [ 31.206736] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.207385] RIP: 0033:0x7f1ab76e0d82 [ 31.207846] 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 [ 31.209982] RSP: 002b:00007ffe7aa99598 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.210888] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1ab76e0d82 [ 31.211737] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1ab6b1a000 [ 31.212600] RBP: 00007f1ab6b1a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.213453] R10: 0000000000000812 R11: 0000000000000206 R12: 00005582faaedec0 [ 31.214299] R13: 00007ffe7aa995b0 R14: 00007ffe7aa995e0 R15: 00007ffe7aa99940 [ 31.215154] [ 31.215450] [ 31.215669] Allocated by task 208: [ 31.216104] kasan_save_stack+0x22/0x50 [ 31.216612] kasan_set_track+0x25/0x30 [ 31.217115] __kasan_slab_alloc+0x59/0x70 [ 31.217650] kmem_cache_alloc+0x16b/0x370 [ 31.218173] vm_area_dup+0x20/0x160 [ 31.218634] __split_vma+0x170/0x950 [ 31.219102] split_vma+0xc6/0x110 [ 31.219540] mprotect_fixup+0x8d2/0xb30 [ 31.220060] do_mprotect_pkey+0x87e/0xd40 [ 31.220581] __x64_sys_mprotect+0x78/0xc0 [ 31.221105] do_syscall_64+0x3f/0x90 [ 31.221587] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.222235] [ 31.222458] Freed by task 203: [ 31.222851] kasan_save_stack+0x22/0x50 [ 31.223353] kasan_set_track+0x25/0x30 [ 31.223850] kasan_save_free_info+0x2b/0x50 [ 31.224384] __kasan_slab_free+0x10a/0x190 [ 31.224919] kmem_cache_free+0x10d/0x4d0 [ 31.225426] rcu_core+0x8c8/0x2860 [ 31.225868] __do_softirq+0x1b7/0x7d4 [ 31.226347] [ 31.226564] Last potentially related work creation: [ 31.227150] kasan_save_stack+0x22/0x50 [ 31.227651] __kasan_record_aux_stack+0x8e/0xa0 [ 31.228236] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.228876] remove_vma+0x139/0x170 [ 31.229335] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.229941] do_vmi_munmap+0x1f1/0x2b0 [ 31.230434] __vm_munmap+0x138/0x3a0 [ 31.230904] __x64_sys_munmap+0x59/0x80 [ 31.231406] do_syscall_64+0x3f/0x90 [ 31.231895] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.232559] [ 31.232773] The buggy address belongs to the object at ffff88801b852740 [ 31.232773] which belongs to the cache vm_area_struct of size 168 [ 31.234254] The buggy address is located 88 bytes inside of [ 31.234254] freed 168-byte region [ffff88801b852740, ffff88801b8527e8) [ 31.235663] [ 31.235886] The buggy address belongs to the physical page: [ 31.236551] page:000000001f8fd92e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1b852 [ 31.237661] memcg:ffff88801abc0301 [ 31.238086] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.238731] page_type: 0xffffffff() [ 31.239189] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.240137] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801abc0301 [ 31.241047] page dumped because: kasan: bad access detected [ 31.241710] [ 31.241929] Memory state around the buggy address: [ 31.242506] ffff88801b852680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.243365] ffff88801b852700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.244234] >ffff88801b852780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.245088] ^ [ 31.245576] ffff88801b852800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.246439] ffff88801b852880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.247289] ================================================================== [ 31.248245] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.471211] BUG: Bad rss-counter state mm:000000008038a43d type:MM_FILEPAGES val:33 [ 33.472105] BUG: Bad rss-counter state mm:000000008038a43d type:MM_ANONPAGES val:22 [ 33.959194] BUG: Bad rss-counter state mm:000000005e659341 type:MM_FILEPAGES val:33 [ 33.960357] BUG: Bad rss-counter state mm:000000005e659341 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44909' (ECDSA) to the list of known hosts. 2023/06/21 02:06:42 fuzzer started 2023/06/21 02:06:42 dialing manager at localhost:36067 2023/06/21 02:06:42 checking machine... 2023/06/21 02:06:42 checking revisions... [ 34.668265] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:06:42 testing simple program... [ 34.712430] cgroup: Unknown subsys name 'net' [ 34.777803] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:06:42 Registers: info registers vcpu 0 RAX=1ffffffff0a59488 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800d989b40 RSI=ffffffff81eeb388 RDI=0000000000000005 RBP=dffffc0000000000 RSP=ffff888014707888 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=ffff88800c54a140 R14=ffff8880166f9800 R15=0000000000000053 RIP=ffffffff814c0864 RFL=00000246 [---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 00007f447b14a900 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=00007f51b8320650 CR3=000000000c65a000 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=7b750dfcbfa1358d00000000000ae988 XMM05=2b3e57b5c2c4035d0000000000133dc8 XMM06=806171799158d9670000000000132848 XMM07=fb795ef6d65770560000000000121dc8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=1ffff11001ed61a3 RSI=0000000000000004 RDI=ffff88800f6b0da0 RBP=0000000000001000 RSP=ffff888015f1f4b8 R8 =0000000000000002 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88801035e000 R13=0000000000000000 R14=ffff88800f6b0d58 R15=ffff88800f6b0d10 RIP=ffffffff8184734d RFL=00000246 [---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 00007f51b7d6b900 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=00007f51b8322618 CR3=000000000e86a000 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=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