syzkaller login: [ 32.588042] BUG: Bad rss-counter state mm:0000000022815c2e type:MM_FILEPAGES val:33 [ 32.589773] BUG: Bad rss-counter state mm:0000000022815c2e type:MM_ANONPAGES val:22 [ 32.765048] ================================================================== [ 32.766224] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.767714] Read of size 8 at addr ffff8880198ef968 by task sshd/220 [ 32.768745] [ 32.769031] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.770162] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.771449] Call Trace: [ 32.771876] [ 32.772273] dump_stack_lvl+0x91/0xf0 [ 32.772905] print_report+0xcc/0x620 [ 32.773573] ? __virt_addr_valid+0x102/0x340 [ 32.774193] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.774802] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.775424] kasan_report+0xbe/0xf0 [ 32.775898] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.776524] vma_interval_tree_remove+0xc75/0xec0 [ 32.777173] vma_prepare+0xc54/0x11a0 [ 32.777742] __split_vma+0x5af/0x950 [ 32.778264] ? __pfx___split_vma+0x10/0x10 [ 32.778846] ? find_held_lock+0x2c/0x110 [ 32.779433] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.780051] ? lock_is_held_type+0x9f/0x120 [ 32.780607] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.781299] ? mtree_range_walk+0x632/0x900 [ 32.781874] ? mas_walk+0x5c7/0x7c0 [ 32.782396] do_vmi_munmap+0x1f1/0x2b0 [ 32.782926] mmap_region+0x1f9/0x2660 [ 32.783437] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.784006] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.784771] ? __pfx_lock_acquire+0x10/0x10 [ 32.785394] ? __pfx_mmap_region+0x10/0x10 [ 32.785998] ? security_mmap_addr+0x7d/0xa0 [ 32.786553] ? get_unmapped_area+0x1f5/0x3f0 [ 32.787173] do_mmap+0x854/0xf00 [ 32.787644] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.788183] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.788805] ksys_mmap_pgoff+0x3af/0x500 [ 32.789397] do_syscall_64+0x3f/0x90 [ 32.789897] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.790618] RIP: 0033:0x7fd28e079d82 [ 32.791121] 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 [ 32.793506] RSP: 002b:00007ffe5ac23f38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.794513] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd28e079d82 [ 32.795447] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd28d4b3000 [ 32.796380] RBP: 00007fd28d4b3000 R08: 0000000000000009 R09: 0000000000001000 [ 32.797334] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dc0e50eb20 [ 32.798245] R13: 00007ffe5ac23f50 R14: 00007ffe5ac23f80 R15: 00007ffe5ac242e0 [ 32.799169] [ 32.799484] [ 32.799711] Allocated by task 213: [ 32.800186] kasan_save_stack+0x22/0x50 [ 32.800712] kasan_set_track+0x25/0x30 [ 32.801283] __kasan_slab_alloc+0x59/0x70 [ 32.801845] kmem_cache_alloc+0x16b/0x370 [ 32.802432] vm_area_dup+0x20/0x160 [ 32.802945] __split_vma+0x170/0x950 [ 32.803440] split_vma+0xc6/0x110 [ 32.803927] mprotect_fixup+0x8d2/0xb30 [ 32.804472] do_mprotect_pkey+0x87e/0xd40 [ 32.805055] __x64_sys_mprotect+0x78/0xc0 [ 32.805646] do_syscall_64+0x3f/0x90 [ 32.806153] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.806868] [ 32.807158] Freed by task 213: [ 32.807728] kasan_save_stack+0x22/0x50 [ 32.808301] kasan_set_track+0x25/0x30 [ 32.808832] kasan_save_free_info+0x2b/0x50 [ 32.809431] __kasan_slab_free+0x10a/0x190 [ 32.810019] kmem_cache_free+0x10d/0x4d0 [ 32.810562] rcu_core+0x8c8/0x2860 [ 32.811077] __do_softirq+0x1b7/0x7d4 [ 32.811606] [ 32.811835] Last potentially related work creation: [ 32.812502] kasan_save_stack+0x22/0x50 [ 32.813040] __kasan_record_aux_stack+0x8e/0xa0 [ 32.813678] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.814390] remove_vma+0x139/0x170 [ 32.814876] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.815474] do_vmi_munmap+0x1f1/0x2b0 [ 32.815998] __vm_munmap+0x138/0x3a0 [ 32.816482] __x64_sys_munmap+0x59/0x80 [ 32.817050] do_syscall_64+0x3f/0x90 [ 32.817561] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.818259] [ 32.818489] The buggy address belongs to the object at ffff8880198ef910 [ 32.818489] which belongs to the cache vm_area_struct of size 168 [ 32.820152] The buggy address is located 88 bytes inside of [ 32.820152] freed 168-byte region [ffff8880198ef910, ffff8880198ef9b8) [ 32.821709] [ 32.821946] The buggy address belongs to the physical page: [ 32.822695] page:00000000ebec9c38 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x198ef [ 32.823934] memcg:ffff88800c461201 [ 32.824403] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.825110] page_type: 0xffffffff() [ 32.825606] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.826622] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c461201 [ 32.827643] page dumped because: kasan: bad access detected [ 32.828368] [ 32.828595] Memory state around the buggy address: [ 32.829248] ffff8880198ef800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 32.830177] ffff8880198ef880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 32.831087] >ffff8880198ef900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.832072] ^ [ 32.832907] ffff8880198ef980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 32.833880] ffff8880198efa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.834821] ================================================================== [ 32.836123] Disabling lock debugging due to kernel taint [ 34.380530] BUG: Bad rss-counter state mm:000000007a920480 type:MM_FILEPAGES val:33 [ 34.381679] BUG: Bad rss-counter state mm:000000007a920480 type:MM_ANONPAGES val:22 [ 34.894132] BUG: Bad rss-counter state mm:0000000025be678f type:MM_FILEPAGES val:33 [ 34.895234] BUG: Bad rss-counter state mm:0000000025be678f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19428' (ECDSA) to the list of known hosts. 2023/06/20 05:31:22 fuzzer started 2023/06/20 05:31:22 dialing manager at localhost:44161 2023/06/20 05:31:22 checking machine... 2023/06/20 05:31:22 checking revisions... [ 35.663120] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:31:22 testing simple program... [ 35.713436] cgroup: Unknown subsys name 'net' [ 35.773701] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:31:20 Registers: info registers vcpu 0 RAX=ffff888008d80001 RBX=ffff888008d7f978 RCX=0000000000000001 RDX=ffff888008d7ff01 RSI=ffff888008d7ff18 RDI=ffff888008d7f988 RBP=ffff888008d7ff18 RSP=ffff888008d7f8d0 R8 =ffffffff860aefca R9 =ffff888008d7f9b8 R10=0000000000038001 R11=000000000000a1ff R12=0000000000000008 R13=ffff888008d78000 R14=ffff888008d7ff20 R15=ffff888008d7f978 RIP=ffffffff8113048d 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 0000000000000000 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=00007fcfe4719690 CR3=00000000101c6000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=a226dfbe2f5d058300000000000ae988 XMM05=65782bb8b7e61ae100000000001359f8 XMM06=19e9129bd510f2350000000000134b40 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001d63085 RBX=ffff88800eb183f8 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800eb18428 RBP=ffff888015c75a70 RSP=ffff888008e57cb8 R8 =0000000000000001 R9 =ffffed10011caf8b R10=0000000000000003 R11=0000000000000128 R12=dffffc0000000000 R13=ffff888015c75780 R14=ffffffff813782a8 R15=ffff88800b363980 RIP=ffffffff81846362 RFL=00000046 [---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 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=00007f01249b5618 CR3=0000000019a74000 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