syzkaller login: [ 30.604500] BUG: Bad rss-counter state mm:00000000bd432656 type:MM_FILEPAGES val:33 [ 30.605884] BUG: Bad rss-counter state mm:00000000bd432656 type:MM_ANONPAGES val:22 [ 30.752295] ================================================================== [ 30.753373] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.754498] Read of size 8 at addr ffff88800fc15c20 by task sshd/220 [ 30.755518] [ 30.755736] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.756603] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.757602] Call Trace: [ 30.757926] [ 30.758215] dump_stack_lvl+0x91/0xf0 [ 30.758715] print_report+0xcc/0x620 [ 30.759206] ? __virt_addr_valid+0x102/0x340 [ 30.759761] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.760383] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.761004] kasan_report+0xbe/0xf0 [ 30.761483] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.762117] vma_interval_tree_remove+0xc75/0xec0 [ 30.762733] vma_prepare+0xc54/0x11a0 [ 30.763217] __split_vma+0x5af/0x950 [ 30.763690] ? __pfx___split_vma+0x10/0x10 [ 30.764225] ? find_held_lock+0x2c/0x110 [ 30.764748] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.765322] ? lock_is_held_type+0x9f/0x120 [ 30.765863] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.766473] ? mtree_range_walk+0x632/0x900 [ 30.767044] ? mas_walk+0x5c7/0x7c0 [ 30.767528] do_vmi_munmap+0x1f1/0x2b0 [ 30.768025] mmap_region+0x1f9/0x2660 [ 30.768515] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.769039] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.769750] ? __pfx_lock_acquire+0x10/0x10 [ 30.770282] ? __pfx_mmap_region+0x10/0x10 [ 30.770830] ? security_mmap_addr+0x7d/0xa0 [ 30.771364] ? get_unmapped_area+0x1f5/0x3f0 [ 30.771917] do_mmap+0x854/0xf00 [ 30.772359] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.772855] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.773420] ksys_mmap_pgoff+0x3af/0x500 [ 30.773927] do_syscall_64+0x3f/0x90 [ 30.774413] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.775077] RIP: 0033:0x7f2a97fcfd82 [ 30.775537] 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 [ 30.777687] RSP: 002b:00007ffcecaf1fa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.778614] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2a97fcfd82 [ 30.779463] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2a97409000 [ 30.780313] RBP: 00007f2a97409000 R08: 0000000000000009 R09: 0000000000001000 [ 30.781181] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c238fc5ec0 [ 30.782031] R13: 00007ffcecaf1fc0 R14: 00007ffcecaf1ff0 R15: 00007ffcecaf2350 [ 30.782897] [ 30.783198] [ 30.783418] Allocated by task 213: [ 30.783848] kasan_save_stack+0x22/0x50 [ 30.784354] kasan_set_track+0x25/0x30 [ 30.784861] __kasan_slab_alloc+0x59/0x70 [ 30.785397] kmem_cache_alloc+0x16b/0x370 [ 30.785914] vm_area_dup+0x20/0x160 [ 30.786375] __split_vma+0x170/0x950 [ 30.786869] split_vma+0xc6/0x110 [ 30.787323] mprotect_fixup+0x8d2/0xb30 [ 30.787838] do_mprotect_pkey+0x87e/0xd40 [ 30.788365] __x64_sys_mprotect+0x78/0xc0 [ 30.788899] do_syscall_64+0x3f/0x90 [ 30.789375] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.790031] [ 30.790254] Freed by task 213: [ 30.790655] kasan_save_stack+0x22/0x50 [ 30.791161] kasan_set_track+0x25/0x30 [ 30.791663] kasan_save_free_info+0x2b/0x50 [ 30.792203] __kasan_slab_free+0x10a/0x190 [ 30.792743] kmem_cache_free+0x10d/0x4d0 [ 30.793267] rcu_core+0x8c8/0x2860 [ 30.793723] __do_softirq+0x1b7/0x7d4 [ 30.794211] [ 30.794428] Last potentially related work creation: [ 30.795041] kasan_save_stack+0x22/0x50 [ 30.795560] __kasan_record_aux_stack+0x8e/0xa0 [ 30.796135] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.796861] remove_vma+0x139/0x170 [ 30.797320] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.797882] do_vmi_munmap+0x1f1/0x2b0 [ 30.798374] __vm_munmap+0x138/0x3a0 [ 30.798857] __x64_sys_munmap+0x59/0x80 [ 30.799360] do_syscall_64+0x3f/0x90 [ 30.799845] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.800496] [ 30.800715] The buggy address belongs to the object at ffff88800fc15bc8 [ 30.800715] which belongs to the cache vm_area_struct of size 168 [ 30.802193] The buggy address is located 88 bytes inside of [ 30.802193] freed 168-byte region [ffff88800fc15bc8, ffff88800fc15c70) [ 30.803635] [ 30.803856] The buggy address belongs to the physical page: [ 30.804519] page:000000005016a559 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfc15 [ 30.805614] memcg:ffff888015d6d401 [ 30.806043] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.806711] page_type: 0xffffffff() [ 30.807172] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.808088] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015d6d401 [ 30.809004] page dumped because: kasan: bad access detected [ 30.809670] [ 30.809894] Memory state around the buggy address: [ 30.810479] ffff88800fc15b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.811366] ffff88800fc15b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.812253] >ffff88800fc15c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.813126] ^ [ 30.813664] ffff88800fc15c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.814539] ffff88800fc15d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.815405] ================================================================== [ 30.816344] Disabling lock debugging due to kernel taint [ 33.348335] BUG: Bad rss-counter state mm:00000000f46a5956 type:MM_FILEPAGES val:33 [ 33.349502] BUG: Bad rss-counter state mm:00000000f46a5956 type:MM_ANONPAGES val:22 [ 33.806496] BUG: Bad rss-counter state mm:00000000d74a4be2 type:MM_FILEPAGES val:33 [ 33.807509] BUG: Bad rss-counter state mm:00000000d74a4be2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30102' (ECDSA) to the list of known hosts. 2023/06/20 16:13:51 fuzzer started 2023/06/20 16:13:51 dialing manager at localhost:36067 2023/06/20 16:13:51 checking machine... 2023/06/20 16:13:51 checking revisions... [ 34.463810] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:13:51 testing simple program... [ 34.505222] cgroup: Unknown subsys name 'net' [ 34.554405] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:13:51 Registers: info registers vcpu 0 RAX=ffff888017d87e80 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff11002fb0f2e RSI=ffffffff8363b61c RDI=ffff888017d87928 RBP=ffff888017d87980 RSP=ffff888017d878b8 R8 =0000000000000001 R9 =ffff888017d87968 R10=0000000000038001 R11=000000000008a6b1 R12=ffff888017d879f0 R13=ffff888017d87970 R14=ffff888015d40000 R15=ffff888017d87928 RIP=ffffffff81130664 RFL=00000282 [--S----] 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 00007fa5b3db1900 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=00007fa5b4366650 CR3=000000000e3fc000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 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=0000000000000001 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=00007f3e4136d000 CR3=00000000139ac000 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=b2a71e558797c898a0490e6f6ce186ce XMM02=000000000011a8a8ec2efd57dc4c00df XMM03=0000000000121d105310dae3d6991401 XMM04=56a19ab2d01cd6de00000000000ae988 XMM05=19e9129bd510f2350000000000131b70 XMM06=848859c118f915d100000000001309d8 XMM07=e042d86d42eb936e0000000000121f90 XMM08=5310dae3d6991401000000000011a908 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000