syzkaller login: [ 38.822141] BUG: Bad rss-counter state mm:000000008845e560 type:MM_FILEPAGES val:33 [ 38.823586] BUG: Bad rss-counter state mm:000000008845e560 type:MM_ANONPAGES val:22 [ 38.991086] ================================================================== [ 38.991984] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.992924] Read of size 8 at addr ffff88800dfe4798 by task sshd/219 [ 38.993699] [ 38.993994] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.994865] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.995826] Call Trace: [ 38.996280] [ 38.996660] dump_stack_lvl+0x91/0xf0 [ 38.997286] print_report+0xcc/0x620 [ 38.997938] ? __virt_addr_valid+0x102/0x340 [ 38.998663] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.999438] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.000216] kasan_report+0xbe/0xf0 [ 39.000822] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.001527] vma_interval_tree_remove+0xc75/0xec0 [ 39.002130] vma_prepare+0xc54/0x11a0 [ 39.002637] __split_vma+0x5af/0x950 [ 39.003110] ? __pfx___split_vma+0x10/0x10 [ 39.003637] ? find_held_lock+0x2c/0x110 [ 39.004164] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.004724] ? lock_is_held_type+0x9f/0x120 [ 39.005257] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.005864] ? mtree_range_walk+0x632/0x900 [ 39.006416] ? mas_walk+0x5c7/0x7c0 [ 39.006887] do_vmi_munmap+0x1f1/0x2b0 [ 39.007377] mmap_region+0x1f9/0x2660 [ 39.007863] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.008384] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.009090] ? __pfx_lock_acquire+0x10/0x10 [ 39.009614] ? __pfx_mmap_region+0x10/0x10 [ 39.010139] ? security_mmap_addr+0x7d/0xa0 [ 39.010664] ? get_unmapped_area+0x1f5/0x3f0 [ 39.011216] do_mmap+0x854/0xf00 [ 39.011651] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.012163] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.012728] ksys_mmap_pgoff+0x3af/0x500 [ 39.013227] do_syscall_64+0x3f/0x90 [ 39.013707] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.014349] RIP: 0033:0x7fad19963d82 [ 39.014806] 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 [ 39.016934] RSP: 002b:00007ffe0931c8c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.017842] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fad19963d82 [ 39.018700] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fad18d9d000 [ 39.019549] RBP: 00007fad18d9d000 R08: 0000000000000009 R09: 0000000000001000 [ 39.020413] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559aa7dbbb20 [ 39.021253] R13: 00007ffe0931c8e0 R14: 00007ffe0931c910 R15: 00007ffe0931cc70 [ 39.022124] [ 39.022426] [ 39.022642] Allocated by task 212: [ 39.023073] kasan_save_stack+0x22/0x50 [ 39.023574] kasan_set_track+0x25/0x30 [ 39.024075] __kasan_slab_alloc+0x59/0x70 [ 39.024597] kmem_cache_alloc+0x16b/0x370 [ 39.025108] vm_area_dup+0x20/0x160 [ 39.025563] __split_vma+0x170/0x950 [ 39.026042] split_vma+0xc6/0x110 [ 39.026473] mprotect_fixup+0x8d2/0xb30 [ 39.026967] do_mprotect_pkey+0x87e/0xd40 [ 39.027482] __x64_sys_mprotect+0x78/0xc0 [ 39.028017] do_syscall_64+0x3f/0x90 [ 39.028503] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.029146] [ 39.029358] Freed by task 212: [ 39.029747] kasan_save_stack+0x22/0x50 [ 39.030253] kasan_set_track+0x25/0x30 [ 39.030746] kasan_save_free_info+0x2b/0x50 [ 39.031277] __kasan_slab_free+0x10a/0x190 [ 39.031804] kmem_cache_free+0x10d/0x4d0 [ 39.032315] rcu_core+0x8c8/0x2860 [ 39.032751] __do_softirq+0x1b7/0x7d4 [ 39.033226] [ 39.033443] Last potentially related work creation: [ 39.034026] kasan_save_stack+0x22/0x50 [ 39.034524] __kasan_record_aux_stack+0x8e/0xa0 [ 39.035092] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.035724] remove_vma+0x139/0x170 [ 39.036186] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.036749] do_vmi_munmap+0x1f1/0x2b0 [ 39.037228] __vm_munmap+0x138/0x3a0 [ 39.037698] __x64_sys_munmap+0x59/0x80 [ 39.038196] do_syscall_64+0x3f/0x90 [ 39.038677] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.039344] [ 39.039559] The buggy address belongs to the object at ffff88800dfe4740 [ 39.039559] which belongs to the cache vm_area_struct of size 168 [ 39.041050] The buggy address is located 88 bytes inside of [ 39.041050] freed 168-byte region [ffff88800dfe4740, ffff88800dfe47e8) [ 39.042451] [ 39.042667] The buggy address belongs to the physical page: [ 39.043321] page:000000009f32003d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdfe4 [ 39.044408] memcg:ffff88800d780501 [ 39.044834] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.045469] page_type: 0xffffffff() [ 39.045920] raw: 0100000000000200 ffff8880087a0c80 ffffea00003613c0 dead000000000006 [ 39.046824] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d780501 [ 39.047718] page dumped because: kasan: bad access detected [ 39.048394] [ 39.048611] Memory state around the buggy address: [ 39.049195] ffff88800dfe4680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.050040] ffff88800dfe4700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 39.050886] >ffff88800dfe4780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 39.051730] ^ [ 39.052223] ffff88800dfe4800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 39.053069] ffff88800dfe4880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 39.053913] ================================================================== [ 39.054882] Disabling lock debugging due to kernel taint [ 41.092902] BUG: Bad rss-counter state mm:00000000c67f16af type:MM_FILEPAGES val:33 [ 41.094050] BUG: Bad rss-counter state mm:00000000c67f16af type:MM_ANONPAGES val:22 [ 41.532330] BUG: Bad rss-counter state mm:000000009cae0c54 type:MM_FILEPAGES val:33 [ 41.533488] BUG: Bad rss-counter state mm:000000009cae0c54 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56654' (ECDSA) to the list of known hosts. 2023/06/21 06:54:11 fuzzer started 2023/06/21 06:54:11 dialing manager at localhost:36067 2023/06/21 06:54:11 checking machine... 2023/06/21 06:54:11 checking revisions... [ 42.142612] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:54:11 testing simple program... [ 42.187331] cgroup: Unknown subsys name 'net' [ 42.237525] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:54:10 Registers: info registers vcpu 0 RAX=ffffffff816cb7aa RBX=ffffffff85deea28 RCX=ffffffff816cb7f9 RDX=0000000000000000 RSI=ffffffff86121d74 RDI=ffffffff85deea0c RBP=ffffffff85deea20 RSP=ffff888016caf258 R8 =ffffffff86121d74 R9 =ffff888016caf350 R10=0000000000038001 R11=000000000001d012 R12=ffffffff85deea30 R13=ffffffff85deea0c R14=ffffffff85deea1c R15=dffffc0000000000 RIP=ffffffff8112fc4b RFL=00000212 [----A--] 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 00007f699d5af900 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=00007f699ca416b0 CR3=000000000d7f0000 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=2659a4037ab2500a00000000000ae988 XMM05=d3960bf77f291e5a0000000000132fe8 XMM06=806171799158d9670000000000131d18 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff863b7f8e RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff888016eaf1b0 RSP=ffff888016eaf0e8 R8 =ffffffff863b7f92 R9 =ffff888016eaf198 R10=0000000000038001 R11=000000000008b5c1 R12=ffff888016eaf1b8 R13=ffff888016eaf1a0 R14=0000000000000005 R15=ffff888016eaf158 RIP=ffffffff81130b39 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 00007fb5caf35900 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=00007fb5cb4ec618 CR3=000000000f28c000 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