syzkaller login: [ 33.767876] BUG: Bad rss-counter state mm:00000000d67675bf type:MM_FILEPAGES val:33 [ 33.769029] BUG: Bad rss-counter state mm:00000000d67675bf type:MM_ANONPAGES val:22 [ 33.925504] ================================================================== [ 33.926601] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.927707] Read of size 8 at addr ffff88800edd05c8 by task sshd/220 [ 33.928794] [ 33.929013] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.929876] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.930889] Call Trace: [ 33.931211] [ 33.931495] dump_stack_lvl+0x91/0xf0 [ 33.931987] print_report+0xcc/0x620 [ 33.932468] ? __virt_addr_valid+0x102/0x340 [ 33.933021] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.933646] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.934276] kasan_report+0xbe/0xf0 [ 33.934754] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.935376] vma_interval_tree_remove+0xc75/0xec0 [ 33.935978] vma_prepare+0xc54/0x11a0 [ 33.936455] __split_vma+0x5af/0x950 [ 33.936922] ? __pfx___split_vma+0x10/0x10 [ 33.937458] ? find_held_lock+0x2c/0x110 [ 33.937982] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.938565] ? lock_is_held_type+0x9f/0x120 [ 33.939108] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.939713] ? mtree_range_walk+0x632/0x900 [ 33.940260] ? mas_walk+0x5c7/0x7c0 [ 33.940735] do_vmi_munmap+0x1f1/0x2b0 [ 33.941306] mmap_region+0x1f9/0x2660 [ 33.941872] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.942393] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.943116] ? __pfx_lock_acquire+0x10/0x10 [ 33.943656] ? __pfx_mmap_region+0x10/0x10 [ 33.944161] ? security_mmap_addr+0x7d/0xa0 [ 33.944662] ? get_unmapped_area+0x1f5/0x3f0 [ 33.945186] do_mmap+0x854/0xf00 [ 33.945608] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.946088] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.946642] ksys_mmap_pgoff+0x3af/0x500 [ 33.947125] do_syscall_64+0x3f/0x90 [ 33.947578] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.948191] RIP: 0033:0x7fc032d16d82 [ 33.948625] 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 [ 33.950626] RSP: 002b:00007ffce663a278 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.951480] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc032d16d82 [ 33.952286] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc032150000 [ 33.953091] RBP: 00007fc032150000 R08: 0000000000000009 R09: 0000000000001000 [ 33.953898] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c3415f0ec0 [ 33.954716] R13: 00007ffce663a290 R14: 00007ffce663a2c0 R15: 00007ffce663a620 [ 33.955533] [ 33.955811] [ 33.956019] Allocated by task 213: [ 33.956427] kasan_save_stack+0x22/0x50 [ 33.956906] kasan_set_track+0x25/0x30 [ 33.957376] __kasan_slab_alloc+0x59/0x70 [ 33.957879] kmem_cache_alloc+0x16b/0x370 [ 33.958381] vm_area_dup+0x20/0x160 [ 33.958821] __split_vma+0x170/0x950 [ 33.959266] split_vma+0xc6/0x110 [ 33.959687] mprotect_fixup+0x8d2/0xb30 [ 33.960166] do_mprotect_pkey+0x87e/0xd40 [ 33.960658] __x64_sys_mprotect+0x78/0xc0 [ 33.961153] do_syscall_64+0x3f/0x90 [ 33.961602] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.962226] [ 33.962444] Freed by task 213: [ 33.962817] kasan_save_stack+0x22/0x50 [ 33.963297] kasan_set_track+0x25/0x30 [ 33.963768] kasan_save_free_info+0x2b/0x50 [ 33.964284] __kasan_slab_free+0x10a/0x190 [ 33.964793] kmem_cache_free+0x10d/0x4d0 [ 33.965275] rcu_core+0x8c8/0x2860 [ 33.965699] __do_softirq+0x1b7/0x7d4 [ 33.966150] [ 33.966384] Last potentially related work creation: [ 33.966946] kasan_save_stack+0x22/0x50 [ 33.967423] __kasan_record_aux_stack+0x8e/0xa0 [ 33.967972] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.968589] remove_vma+0x139/0x170 [ 33.969018] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.969595] do_vmi_munmap+0x1f1/0x2b0 [ 33.970060] __vm_munmap+0x138/0x3a0 [ 33.970523] __x64_sys_munmap+0x59/0x80 [ 33.971004] do_syscall_64+0x3f/0x90 [ 33.971453] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.972076] [ 33.972289] Second to last potentially related work creation: [ 33.972943] kasan_save_stack+0x22/0x50 [ 33.973424] __kasan_record_aux_stack+0x8e/0xa0 [ 33.973979] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.974613] remove_vma+0x139/0x170 [ 33.975042] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.975569] do_vmi_munmap+0x1f1/0x2b0 [ 33.976033] mmap_region+0x1f9/0x2660 [ 33.976483] do_mmap+0x854/0xf00 [ 33.976896] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.977366] ksys_mmap_pgoff+0x3af/0x500 [ 33.977933] do_syscall_64+0x3f/0x90 [ 33.978519] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.979297] [ 33.979551] The buggy address belongs to the object at ffff88800edd0570 [ 33.979551] which belongs to the cache vm_area_struct of size 168 [ 33.981360] The buggy address is located 88 bytes inside of [ 33.981360] freed 168-byte region [ffff88800edd0570, ffff88800edd0618) [ 33.983124] [ 33.983384] The buggy address belongs to the physical page: [ 33.984188] page:000000001c091c95 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xedd0 [ 33.985517] memcg:ffff88800ed74501 [ 33.986032] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.986828] page_type: 0xffffffff() [ 33.987313] raw: 0100000000000200 ffff88800879fc80 ffffea0000381400 dead000000000006 [ 33.988226] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed74501 [ 33.989128] page dumped because: kasan: bad access detected [ 33.989789] [ 33.990002] Memory state around the buggy address: [ 33.990611] ffff88800edd0480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.991461] ffff88800edd0500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 33.992318] >ffff88800edd0580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.993154] ^ [ 33.993817] ffff88800edd0600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 33.994657] ffff88800edd0680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.995507] ================================================================== [ 33.996416] Disabling lock debugging due to kernel taint [ 36.091958] BUG: Bad rss-counter state mm:0000000055831bd6 type:MM_FILEPAGES val:33 [ 36.093159] BUG: Bad rss-counter state mm:0000000055831bd6 type:MM_ANONPAGES val:22 [ 36.566148] BUG: Bad rss-counter state mm:000000003fba0948 type:MM_FILEPAGES val:33 [ 36.567496] BUG: Bad rss-counter state mm:000000003fba0948 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54177' (ECDSA) to the list of known hosts. 2023/06/20 02:38:48 fuzzer started 2023/06/20 02:38:49 dialing manager at localhost:44161 2023/06/20 02:38:49 checking machine... 2023/06/20 02:38:49 checking revisions... [ 37.234835] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:38:49 testing simple program... [ 37.277615] cgroup: Unknown subsys name 'net' [ 37.312247] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:38:43 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888009bcf3e8 RCX=ffffffff863b1762 RDX=1ffff11001379e7d RSI=ffff888009bcfd00 RDI=ffff888009bcf3e8 RBP=ffff888009bcfd00 RSP=ffff888009bcf340 R8 =ffffffff863b1766 R9 =ffff888009bcf428 R10=0000000000038001 R11=000000000008a899 R12=0000000000000008 R13=ffff888009bcf430 R14=ffff888009bcfd08 R15=ffff888009bcf3e8 RIP=ffffffff81130416 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 00007f91044c2900 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=00007ffc1716c000 CR3=000000001a0e0000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 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=00007fddf62b0000 CR3=000000000c4ac000 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=53de2f5ab7671a88e749896506c08366 XMM02=000000000011dcc8eff9b2d0a8fce9cb XMM03=000000000011dd982c67c8bc2e329bc3 XMM04=f85dc1d85e45b60500000000000ae988 XMM05=19e9129bd510f2350000000000135a68 XMM06=4fda316b135da52b00000000001358f0 XMM07=e042d86d42eb936e0000000000124d98 XMM08=5bfde6a80a31782f000000000011dd98 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000