syzkaller login: [ 29.216310] BUG: Bad rss-counter state mm:000000007886f59f type:MM_FILEPAGES val:33 [ 29.217495] BUG: Bad rss-counter state mm:000000007886f59f type:MM_ANONPAGES val:22 [ 29.256114] ================================================================== [ 29.257084] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.258010] Read of size 8 at addr ffff888016b42d08 by task sshd/220 [ 29.258770] [ 29.259012] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.259861] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.260830] Call Trace: [ 29.261143] [ 29.261421] dump_stack_lvl+0x91/0xf0 [ 29.261910] print_report+0xcc/0x620 [ 29.262383] ? __virt_addr_valid+0x102/0x340 [ 29.262954] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.263562] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.264171] kasan_report+0xbe/0xf0 [ 29.264641] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.265247] vma_interval_tree_remove+0xc75/0xec0 [ 29.265845] vma_prepare+0xc54/0x11a0 [ 29.266314] __split_vma+0x5af/0x950 [ 29.266788] ? __pfx___split_vma+0x10/0x10 [ 29.267311] ? find_held_lock+0x2c/0x110 [ 29.267832] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.268391] ? lock_is_held_type+0x9f/0x120 [ 29.268928] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.269526] ? mtree_range_walk+0x632/0x900 [ 29.270073] ? mas_walk+0x5c7/0x7c0 [ 29.270547] do_vmi_munmap+0x1f1/0x2b0 [ 29.271062] mmap_region+0x1f9/0x2660 [ 29.271535] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.272035] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.272732] ? __pfx_lock_acquire+0x10/0x10 [ 29.273253] ? __pfx_mmap_region+0x10/0x10 [ 29.273774] ? security_mmap_addr+0x7d/0xa0 [ 29.274305] ? get_unmapped_area+0x1f5/0x3f0 [ 29.274863] do_mmap+0x854/0xf00 [ 29.275305] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.275795] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.276362] ksys_mmap_pgoff+0x3af/0x500 [ 29.276879] do_syscall_64+0x3f/0x90 [ 29.277354] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.278005] RIP: 0033:0x7f65875cfd82 [ 29.278458] 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 [ 29.280586] RSP: 002b:00007fffa3198dd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.281491] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f65875cfd82 [ 29.282344] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6586a09000 [ 29.283187] RBP: 00007f6586a09000 R08: 0000000000000009 R09: 0000000000001000 [ 29.284026] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c0d2931f70 [ 29.284960] R13: 00007fffa3198df0 R14: 00007fffa3198e20 R15: 00007fffa3199180 [ 29.285803] [ 29.286091] [ 29.286312] Allocated by task 213: [ 29.286731] kasan_save_stack+0x22/0x50 [ 29.287246] kasan_set_track+0x25/0x30 [ 29.287730] __kasan_slab_alloc+0x59/0x70 [ 29.288242] kmem_cache_alloc+0x16b/0x370 [ 29.288754] vm_area_dup+0x20/0x160 [ 29.289202] __split_vma+0x170/0x950 [ 29.289656] split_vma+0xc6/0x110 [ 29.290089] mprotect_fixup+0x8d2/0xb30 [ 29.290586] do_mprotect_pkey+0x87e/0xd40 [ 29.291113] __x64_sys_mprotect+0x78/0xc0 [ 29.291627] do_syscall_64+0x3f/0x90 [ 29.292096] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.292737] [ 29.292948] Freed by task 213: [ 29.293332] kasan_save_stack+0x22/0x50 [ 29.293825] kasan_set_track+0x25/0x30 [ 29.294312] kasan_save_free_info+0x2b/0x50 [ 29.294841] __kasan_slab_free+0x10a/0x190 [ 29.295368] kmem_cache_free+0x10d/0x4d0 [ 29.295868] rcu_core+0x8c8/0x2860 [ 29.296305] __do_softirq+0x1b7/0x7d4 [ 29.296774] [ 29.296985] Last potentially related work creation: [ 29.297557] kasan_save_stack+0x22/0x50 [ 29.298058] __kasan_record_aux_stack+0x8e/0xa0 [ 29.298624] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.299267] remove_vma+0x139/0x170 [ 29.299715] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.300270] do_vmi_munmap+0x1f1/0x2b0 [ 29.300749] __vm_munmap+0x138/0x3a0 [ 29.301217] __x64_sys_munmap+0x59/0x80 [ 29.301702] do_syscall_64+0x3f/0x90 [ 29.302173] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.302816] [ 29.303028] The buggy address belongs to the object at ffff888016b42cb0 [ 29.303028] which belongs to the cache vm_area_struct of size 168 [ 29.304466] The buggy address is located 88 bytes inside of [ 29.304466] freed 168-byte region [ffff888016b42cb0, ffff888016b42d58) [ 29.305850] [ 29.306064] The buggy address belongs to the physical page: [ 29.306706] page:0000000064c5f9ac refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16b42 [ 29.307798] memcg:ffff888009947b01 [ 29.308217] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.308856] page_type: 0xffffffff() [ 29.309299] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 29.310209] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009947b01 [ 29.311103] page dumped because: kasan: bad access detected [ 29.311754] [ 29.311966] Memory state around the buggy address: [ 29.312533] ffff888016b42c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 29.313376] ffff888016b42c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 29.314219] >ffff888016b42d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 29.315064] ^ [ 29.315494] ffff888016b42d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 29.316336] ffff888016b42e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 29.317167] ================================================================== [ 29.318307] Disabling lock debugging due to kernel taint [ 31.342640] BUG: Bad rss-counter state mm:00000000970611b8 type:MM_FILEPAGES val:33 [ 31.343872] BUG: Bad rss-counter state mm:00000000970611b8 type:MM_ANONPAGES val:22 [ 31.828951] BUG: Bad rss-counter state mm:00000000b97b5ac3 type:MM_FILEPAGES val:33 [ 31.830295] BUG: Bad rss-counter state mm:00000000b97b5ac3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42032' (ECDSA) to the list of known hosts. 2023/06/21 01:10:12 fuzzer started 2023/06/21 01:10:12 dialing manager at localhost:36067 2023/06/21 01:10:12 checking machine... 2023/06/21 01:10:12 checking revisions... [ 32.607800] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:10:13 testing simple program... [ 32.661232] cgroup: Unknown subsys name 'net' [ 32.722117] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:10:12 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff888010187540 RBP=0000000000000014 RSP=ffff888015cd7d90 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff888010187540 R13=ffff888010187480 R14=fffffffffffffffe R15=dffffc0000000000 RIP=ffffffff812e0024 RFL=00000286 [--S--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 00007fec0bd4b900 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=00007fec0b179110 CR3=000000000d848000 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=6a607fefa1a3e10f00000000000ae988 XMM05=8cdcb9a4b2667bce0000000000132ba0 XMM06=19e9129bd510f2350000000000131a58 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff8880164b78d8 RCX=0000000000000001 RDX=1ffff11002c96f26 RSI=ffff8880164b7c68 RDI=ffff8880164b78d8 RBP=ffff8880164b7930 RSP=ffff8880164b78c0 R8 =0000000000000001 R9 =ffff8880164b7918 R10=0000000000038001 R11=000000000000fc0c R12=ffff8880164b79a0 R13=0000000000000000 R14=ffff88800ef50000 R15=ffff88800d635030 RIP=ffffffff8113038e 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 00007f125d06d900 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=00007ffc80a41000 CR3=000000001ca32000 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=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