[ 24.000662] BUG: Bad rss-counter state mm:0000000079505dbb type:MM_FILEPAGES val:33 [ 24.001749] BUG: Bad rss-counter state mm:0000000079505dbb type:MM_ANONPAGES val:22 [ 24.235402] ================================================================== [ 24.236327] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.237260] Read of size 8 at addr ffff88801bc07b38 by task sshd/218 [ 24.238041] [ 24.238384] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.239249] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.240235] Call Trace: [ 24.240560] [ 24.240849] dump_stack_lvl+0x91/0xf0 [ 24.241348] print_report+0xcc/0x620 [ 24.241839] ? __virt_addr_valid+0x102/0x340 [ 24.242398] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.243035] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.243650] kasan_report+0xbe/0xf0 [ 24.244127] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.244749] vma_interval_tree_remove+0xc75/0xec0 [ 24.245358] vma_prepare+0xc54/0x11a0 [ 24.245840] __split_vma+0x5af/0x950 [ 24.246317] ? __pfx___split_vma+0x10/0x10 [ 24.246861] ? find_held_lock+0x2c/0x110 [ 24.247382] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.247960] ? lock_is_held_type+0x9f/0x120 [ 24.248507] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.249113] ? mtree_range_walk+0x632/0x900 [ 24.249671] ? mas_walk+0x5c7/0x7c0 [ 24.250147] do_vmi_munmap+0x1f1/0x2b0 [ 24.250660] mmap_region+0x1f9/0x2660 [ 24.251141] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.251657] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.252370] ? __pfx_lock_acquire+0x10/0x10 [ 24.252899] ? __pfx_mmap_region+0x10/0x10 [ 24.253427] ? security_mmap_addr+0x7d/0xa0 [ 24.253953] ? get_unmapped_area+0x1f5/0x3f0 [ 24.254518] do_mmap+0x854/0xf00 [ 24.254955] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.255450] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.256011] ksys_mmap_pgoff+0x3af/0x500 [ 24.256530] do_syscall_64+0x3f/0x90 [ 24.257008] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.257659] RIP: 0033:0x7fb423db2d82 [ 24.258118] 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 [ 24.260243] RSP: 002b:00007fffcde10168 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.261142] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb423db2d82 [ 24.261990] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb4231ec000 [ 24.262855] RBP: 00007fb4231ec000 R08: 0000000000000009 R09: 0000000000001000 [ 24.263700] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562d30a0ed90 [ 24.264540] R13: 00007fffcde10180 R14: 00007fffcde101b0 R15: 00007fffcde10510 [ 24.265388] [ 24.265680] [ 24.265895] Allocated by task 206: [ 24.266317] kasan_save_stack+0x22/0x50 [ 24.266838] kasan_set_track+0x25/0x30 [ 24.267332] __kasan_slab_alloc+0x59/0x70 [ 24.267855] kmem_cache_alloc+0x16b/0x370 [ 24.268381] vm_area_dup+0x20/0x160 [ 24.268844] __split_vma+0x170/0x950 [ 24.269320] split_vma+0xc6/0x110 [ 24.269758] mprotect_fixup+0x8d2/0xb30 [ 24.270268] do_mprotect_pkey+0x87e/0xd40 [ 24.270805] __x64_sys_mprotect+0x78/0xc0 [ 24.271334] do_syscall_64+0x3f/0x90 [ 24.271811] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.272461] [ 24.272680] Freed by task 206: [ 24.273068] kasan_save_stack+0x22/0x50 [ 24.273579] kasan_set_track+0x25/0x30 [ 24.274073] kasan_save_free_info+0x2b/0x50 [ 24.274619] __kasan_slab_free+0x10a/0x190 [ 24.275156] kmem_cache_free+0x10d/0x4d0 [ 24.275672] rcu_core+0x8c8/0x2860 [ 24.276119] __do_softirq+0x1b7/0x7d4 [ 24.276603] [ 24.276821] Last potentially related work creation: [ 24.277414] kasan_save_stack+0x22/0x50 [ 24.277916] __kasan_record_aux_stack+0x8e/0xa0 [ 24.278511] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.279164] remove_vma+0x139/0x170 [ 24.279619] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.280177] do_vmi_munmap+0x1f1/0x2b0 [ 24.280673] __vm_munmap+0x138/0x3a0 [ 24.281146] __x64_sys_munmap+0x59/0x80 [ 24.281645] do_syscall_64+0x3f/0x90 [ 24.282122] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.282782] [ 24.283001] The buggy address belongs to the object at ffff88801bc07ae0 [ 24.283001] which belongs to the cache vm_area_struct of size 168 [ 24.284494] The buggy address is located 88 bytes inside of [ 24.284494] freed 168-byte region [ffff88801bc07ae0, ffff88801bc07b88) [ 24.285899] [ 24.286113] The buggy address belongs to the physical page: [ 24.286791] page:0000000081953a44 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bc07 [ 24.287891] memcg:ffff888019be0701 [ 24.288328] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.288973] page_type: 0xffffffff() [ 24.289431] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.290346] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019be0701 [ 24.291262] page dumped because: kasan: bad access detected [ 24.291928] [ 24.292148] Memory state around the buggy address: [ 24.292729] ffff88801bc07a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.293593] ffff88801bc07a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 24.294472] >ffff88801bc07b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.295336] ^ [ 24.295948] ffff88801bc07b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 24.296809] ffff88801bc07c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 24.297659] ================================================================== [ 24.298659] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.556895] BUG: Bad rss-counter state mm:00000000e66f3b76 type:MM_FILEPAGES val:33 [ 26.558151] BUG: Bad rss-counter state mm:00000000e66f3b76 type:MM_ANONPAGES val:22 [ 26.987390] BUG: Bad rss-counter state mm:00000000b2f8621d type:MM_FILEPAGES val:33 [ 26.988441] BUG: Bad rss-counter state mm:00000000b2f8621d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34435' (ECDSA) to the list of known hosts. 2023/06/21 02:47:43 fuzzer started 2023/06/21 02:47:44 dialing manager at localhost:36067 2023/06/21 02:47:44 checking machine... 2023/06/21 02:47:44 checking revisions... [ 27.716433] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:47:44 testing simple program... [ 27.768960] cgroup: Unknown subsys name 'net' [ 27.820517] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:47:43 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000001 RCX=0000000000000000 RDX=0000000000000001 RSI=00000000000000fb RDI=0000000000000001 RBP=ffff8880143cf638 RSP=ffff8880143cf570 R8 =0000000000000001 R9 =ffffed1002879eba R10=ffff8880143cf5d7 R11=0000000000000000 R12=0000000000000001 R13=0000000000000000 R14=0000000000000001 R15=dffffc0000000000 RIP=ffffffff8112993a RFL=00000002 [-------] 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 00007f7dbcd38900 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=00007f7dbc14c448 CR3=000000000ca46000 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=cf896d1848f460e700000000000ae988 XMM05=2cd9d86e17550abe0000000000132648 XMM06=9b8a98b413c1d5050000000000131078 XMM07=fb795ef6d65770560000000000120228 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00007f25a1d92163 RCX=0000000000000000 RDX=ffff888016488000 RSI=ffffffff813a0ac4 RDI=00007f25a1d92163 RBP=ffffffffffffffff RSP=ffff8880199ef538 R8 =0000000000000007 R9 =ffffffffff600000 R10=00007f25a1d92000 R11=00000000000b6a61 R12=ffff8880199ef670 R13=0000000000000000 R14=ffff888016488000 R15=0000000000000000 RIP=ffffffff813a0ad2 RFL=00000283 [--S---C] 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 00007f25a189f900 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=00007f25a1e56618 CR3=000000001679e000 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