syzkaller login: [ 38.877757] BUG: Bad rss-counter state mm:00000000b5b32632 type:MM_FILEPAGES val:33 [ 38.879781] BUG: Bad rss-counter state mm:00000000b5b32632 type:MM_ANONPAGES val:22 [ 39.049447] ================================================================== [ 39.050481] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.051495] Read of size 8 at addr ffff88800e757798 by task sshd/219 [ 39.052479] [ 39.052711] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.053630] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.054685] Call Trace: [ 39.055027] [ 39.055331] dump_stack_lvl+0x91/0xf0 [ 39.055847] print_report+0xcc/0x620 [ 39.056374] ? __virt_addr_valid+0x102/0x340 [ 39.056959] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.057648] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.058303] kasan_report+0xbe/0xf0 [ 39.058808] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.059472] vma_interval_tree_remove+0xc75/0xec0 [ 39.060124] vma_prepare+0xc54/0x11a0 [ 39.060635] __split_vma+0x5af/0x950 [ 39.061141] ? __pfx___split_vma+0x10/0x10 [ 39.061704] ? find_held_lock+0x2c/0x110 [ 39.062267] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.062864] ? lock_is_held_type+0x9f/0x120 [ 39.063438] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.064094] ? mtree_range_walk+0x632/0x900 [ 39.064681] ? mas_walk+0x5c7/0x7c0 [ 39.065203] do_vmi_munmap+0x1f1/0x2b0 [ 39.065730] mmap_region+0x1f9/0x2660 [ 39.066243] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.066790] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.067543] ? __pfx_lock_acquire+0x10/0x10 [ 39.068110] ? __pfx_mmap_region+0x10/0x10 [ 39.068674] ? security_mmap_addr+0x7d/0xa0 [ 39.069251] ? get_unmapped_area+0x1f5/0x3f0 [ 39.069849] do_mmap+0x854/0xf00 [ 39.070311] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.070845] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.071446] ksys_mmap_pgoff+0x3af/0x500 [ 39.071989] do_syscall_64+0x3f/0x90 [ 39.072497] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.073204] RIP: 0033:0x7fc86fc0bd82 [ 39.073688] 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 [ 39.075999] RSP: 002b:00007fffdefb7ce8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.076970] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc86fc0bd82 [ 39.077883] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc86f045000 [ 39.078826] RBP: 00007fc86f045000 R08: 0000000000000009 R09: 0000000000001000 [ 39.079757] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559e18f62f70 [ 39.080690] R13: 00007fffdefb7d00 R14: 00007fffdefb7d30 R15: 00007fffdefb8090 [ 39.081723] [ 39.082070] [ 39.082324] Allocated by task 212: [ 39.082833] kasan_save_stack+0x22/0x50 [ 39.083450] kasan_set_track+0x25/0x30 [ 39.084044] __kasan_slab_alloc+0x59/0x70 [ 39.084722] kmem_cache_alloc+0x16b/0x370 [ 39.085503] vm_area_dup+0x20/0x160 [ 39.086194] __split_vma+0x170/0x950 [ 39.086871] split_vma+0xc6/0x110 [ 39.087496] mprotect_fixup+0x8d2/0xb30 [ 39.088203] do_mprotect_pkey+0x87e/0xd40 [ 39.088945] __x64_sys_mprotect+0x78/0xc0 [ 39.089698] do_syscall_64+0x3f/0x90 [ 39.090374] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.091284] [ 39.091586] Freed by task 212: [ 39.092234] kasan_save_stack+0x22/0x50 [ 39.092945] kasan_set_track+0x25/0x30 [ 39.093669] kasan_save_free_info+0x2b/0x50 [ 39.094431] __kasan_slab_free+0x10a/0x190 [ 39.095193] kmem_cache_free+0x10d/0x4d0 [ 39.095925] rcu_core+0x8c8/0x2860 [ 39.096568] __do_softirq+0x1b7/0x7d4 [ 39.097260] [ 39.097579] Last potentially related work creation: [ 39.098416] kasan_save_stack+0x22/0x50 [ 39.099139] __kasan_record_aux_stack+0x8e/0xa0 [ 39.099990] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.100916] remove_vma+0x139/0x170 [ 39.101594] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.102384] do_vmi_munmap+0x1f1/0x2b0 [ 39.103075] __vm_munmap+0x138/0x3a0 [ 39.103750] __x64_sys_munmap+0x59/0x80 [ 39.104465] do_syscall_64+0x3f/0x90 [ 39.105175] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.106105] [ 39.106411] Second to last potentially related work creation: [ 39.107381] kasan_save_stack+0x22/0x50 [ 39.108102] __kasan_record_aux_stack+0x8e/0xa0 [ 39.108923] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.109851] remove_vma+0x139/0x170 [ 39.110503] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.111307] do_vmi_munmap+0x1f1/0x2b0 [ 39.112006] mmap_region+0x1f9/0x2660 [ 39.112694] do_mmap+0x854/0xf00 [ 39.113341] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.114044] ksys_mmap_pgoff+0x3af/0x500 [ 39.114766] do_syscall_64+0x3f/0x90 [ 39.115433] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.116338] [ 39.116635] The buggy address belongs to the object at ffff88800e757740 [ 39.116635] which belongs to the cache vm_area_struct of size 168 [ 39.118752] The buggy address is located 88 bytes inside of [ 39.118752] freed 168-byte region [ffff88800e757740, ffff88800e7577e8) [ 39.120763] [ 39.121082] The buggy address belongs to the physical page: [ 39.121892] page:00000000bfa16515 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe757 [ 39.123125] memcg:ffff88800dff8801 [ 39.123608] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.124399] page_type: 0xffffffff() [ 39.124905] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 39.125963] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dff8801 [ 39.126999] page dumped because: kasan: bad access detected [ 39.127742] [ 39.127980] Memory state around the buggy address: [ 39.128632] ffff88800e757680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.129622] ffff88800e757700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 39.130584] >ffff88800e757780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 39.131535] ^ [ 39.132093] ffff88800e757800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 39.133060] ffff88800e757880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 39.134029] ================================================================== [ 39.135287] Disabling lock debugging due to kernel taint [ 40.857613] BUG: Bad rss-counter state mm:00000000ea4c6afd type:MM_FILEPAGES val:33 [ 40.858733] BUG: Bad rss-counter state mm:00000000ea4c6afd type:MM_ANONPAGES val:22 [ 41.261037] BUG: Bad rss-counter state mm:000000002d16b702 type:MM_FILEPAGES val:33 [ 41.261764] BUG: Bad rss-counter state mm:000000002d16b702 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25151' (ECDSA) to the list of known hosts. 2023/06/19 21:08:20 fuzzer started 2023/06/19 21:08:20 dialing manager at localhost:44161 2023/06/19 21:08:20 checking machine... 2023/06/19 21:08:20 checking revisions... [ 41.913851] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:08:20 testing simple program... [ 41.953604] cgroup: Unknown subsys name 'net' [ 41.998032] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:08:20 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800eeaf390 RCX=0000000000000001 RDX=1ffff11001dd5e73 RSI=ffff88800eeafe08 RDI=ffff88800eeaf398 RBP=ffff88800eeafe08 RSP=ffff88800eeaf2e8 R8 =ffffffff863b27c8 R9 =ffff88800eeaf3d0 R10=0000000000038001 R11=000000000008ab54 R12=0000000000000008 R13=ffff88800eeaf3d8 R14=ffff88800eeafe10 R15=ffff88800eeaf390 RIP=ffffffff81130445 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 00007f0a0ded0900 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=00007fff5cfb2000 CR3=000000000ea36000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 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=0000000000000001 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=00007f2470ef9080 CR3=000000000c6c0000 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=bd4c10426d88cfab864f7de8fac51794 XMM02=000000000011dcd0ec2efd57dc4c00df XMM03=0000000000124268dab9a70892e3b069 XMM04=2dd32369411d790600000000000ae988 XMM05=495581c98ac7de9e0000000000135cb8 XMM06=806171799158d9670000000000134d70 XMM07=e042d86d42eb936e0000000000124540 XMM08=dab9a70892e3b069000000000011dd30 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000