syzkaller login: [ 60.459473] BUG: Bad rss-counter state mm:00000000edc339dd type:MM_FILEPAGES val:33 [ 60.460786] BUG: Bad rss-counter state mm:00000000edc339dd type:MM_ANONPAGES val:22 [ 60.553582] ================================================================== [ 60.554746] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.556022] Read of size 8 at addr ffff888019bb6c20 by task sshd/221 [ 60.556861] [ 60.557095] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.558046] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.559027] Call Trace: [ 60.559379] [ 60.559685] dump_stack_lvl+0x91/0xf0 [ 60.560221] print_report+0xcc/0x620 [ 60.560750] ? __virt_addr_valid+0x102/0x340 [ 60.561343] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.561998] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.562659] kasan_report+0xbe/0xf0 [ 60.563189] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.563874] vma_interval_tree_remove+0xc75/0xec0 [ 60.564516] vma_prepare+0xc54/0x11a0 [ 60.565034] __split_vma+0x5af/0x950 [ 60.565545] ? __pfx___split_vma+0x10/0x10 [ 60.566125] ? find_held_lock+0x2c/0x110 [ 60.566688] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.567318] ? lock_is_held_type+0x9f/0x120 [ 60.567911] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.568577] ? mtree_range_walk+0x632/0x900 [ 60.569188] ? mas_walk+0x5c7/0x7c0 [ 60.569711] do_vmi_munmap+0x1f1/0x2b0 [ 60.570256] mmap_region+0x1f9/0x2660 [ 60.570787] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.571364] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.572165] ? __pfx_lock_acquire+0x10/0x10 [ 60.572748] ? __pfx_mmap_region+0x10/0x10 [ 60.573333] ? security_mmap_addr+0x7d/0xa0 [ 60.573925] ? get_unmapped_area+0x1f5/0x3f0 [ 60.574528] do_mmap+0x854/0xf00 [ 60.575008] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.575577] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.576192] ksys_mmap_pgoff+0x3af/0x500 [ 60.576755] do_syscall_64+0x3f/0x90 [ 60.577291] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.578012] RIP: 0033:0x7f051b5d0d82 [ 60.578519] 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 [ 60.580878] RSP: 002b:00007ffc462082d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.581878] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f051b5d0d82 [ 60.582810] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f051aa0a000 [ 60.583750] RBP: 00007f051aa0a000 R08: 0000000000000009 R09: 0000000000001000 [ 60.584687] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c5dacbdec0 [ 60.585629] R13: 00007ffc462082f0 R14: 00007ffc46208320 R15: 00007ffc46208680 [ 60.586578] [ 60.586902] [ 60.587156] Allocated by task 214: [ 60.587637] kasan_save_stack+0x22/0x50 [ 60.588199] kasan_set_track+0x25/0x30 [ 60.588753] __kasan_slab_alloc+0x59/0x70 [ 60.589333] kmem_cache_alloc+0x16b/0x370 [ 60.589903] vm_area_dup+0x20/0x160 [ 60.590409] __split_vma+0x170/0x950 [ 60.590923] split_vma+0xc6/0x110 [ 60.591420] mprotect_fixup+0x8d2/0xb30 [ 60.591983] do_mprotect_pkey+0x87e/0xd40 [ 60.592560] __x64_sys_mprotect+0x78/0xc0 [ 60.593144] do_syscall_64+0x3f/0x90 [ 60.593665] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.594380] [ 60.594622] Freed by task 214: [ 60.595056] kasan_save_stack+0x22/0x50 [ 60.595640] kasan_set_track+0x25/0x30 [ 60.596191] kasan_save_free_info+0x2b/0x50 [ 60.596776] __kasan_slab_free+0x10a/0x190 [ 60.597439] kmem_cache_free+0x10d/0x4d0 [ 60.598010] rcu_core+0x8c8/0x2860 [ 60.598506] __do_softirq+0x1b7/0x7d4 [ 60.599033] [ 60.599283] Last potentially related work creation: [ 60.599931] kasan_save_stack+0x22/0x50 [ 60.600492] __kasan_record_aux_stack+0x8e/0xa0 [ 60.601141] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.601857] remove_vma+0x139/0x170 [ 60.602364] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.602982] do_vmi_munmap+0x1f1/0x2b0 [ 60.603523] __vm_munmap+0x138/0x3a0 [ 60.604045] __x64_sys_munmap+0x59/0x80 [ 60.604603] do_syscall_64+0x3f/0x90 [ 60.605132] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.605840] [ 60.606078] The buggy address belongs to the object at ffff888019bb6bc8 [ 60.606078] which belongs to the cache vm_area_struct of size 168 [ 60.607734] The buggy address is located 88 bytes inside of [ 60.607734] freed 168-byte region [ffff888019bb6bc8, ffff888019bb6c70) [ 60.609303] [ 60.609540] The buggy address belongs to the physical page: [ 60.610265] page:0000000055e0b2bb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19bb6 [ 60.611475] memcg:ffff88800c5fbd01 [ 60.611944] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.612663] page_type: 0xffffffff() [ 60.613161] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 60.614201] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c5fbd01 [ 60.615222] page dumped because: kasan: bad access detected [ 60.615963] [ 60.616201] Memory state around the buggy address: [ 60.616842] ffff888019bb6b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 60.617792] ffff888019bb6b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 60.618749] >ffff888019bb6c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 60.619699] ^ [ 60.620280] ffff888019bb6c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 60.621230] ffff888019bb6d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 60.622199] ================================================================== [ 60.623720] Disabling lock debugging due to kernel taint [ 62.993959] BUG: Bad rss-counter state mm:00000000dbcf889d type:MM_FILEPAGES val:33 [ 62.995241] BUG: Bad rss-counter state mm:00000000dbcf889d type:MM_ANONPAGES val:22 [ 63.448945] BUG: Bad rss-counter state mm:00000000c22f5f40 type:MM_FILEPAGES val:33 [ 63.450124] BUG: Bad rss-counter state mm:00000000c22f5f40 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62429' (ECDSA) to the list of known hosts. 2023/06/20 19:14:24 fuzzer started 2023/06/20 19:14:24 dialing manager at localhost:36067 2023/06/20 19:14:25 checking machine... 2023/06/20 19:14:25 checking revisions... [ 64.235637] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:14:25 testing simple program... [ 64.278213] cgroup: Unknown subsys name 'net' [ 64.321847] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:14:24 Registers: info registers vcpu 0 RAX=0000561412cf7eb0 RBX=0000561412d15ed0 RCX=0000000000000012 RDX=0000000000000001 RSI=0000561412d24632 RDI=0000561412cf7eb0 RBP=00007ffd5536aa90 RSP=00007ffd5536aa28 R8 =0000561412d24632 R9 =00007fd8006d2be0 R10=000000000000006f R11=0000000000000246 R12=0000000000000001 R13=0000561412d24632 R14=0000000000000001 R15=0000000000000000 RIP=00007fd800676b2b RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fd800120900 00000000 00000000 GS =0000 0000000000000000 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=00007fd8006d5650 CR3=000000000c954000 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=0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a XMM01=000000000000000000000000000000ff XMM02=2f00646f6874656d5f74707972636e65 XMM03=350909534549525445525f4e49474f4c XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=000000ffffffffffffffffffffffffff XMM08=00000020202020202020002020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 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=00007fbf166a6fd0 CR3=000000000c5b8000 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=e626ef144ffefab1324cd5a08c4b1c6a XMM02=000000000011a418eff9b2d0a8fce9cb XMM03=000000000011a4e82c67c8bc2e329bc3 XMM04=92fad1f26d46a22000000000000ae988 XMM05=e4cb8bb95a7664b60000000000132248 XMM06=c291bd5c70af25b900000000001320d0 XMM07=e042d86d42eb936e0000000000122890 XMM08=48dbf0c3a0a5048d000000000011a4e8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000