syzkaller login: [ 38.821373] BUG: Bad rss-counter state mm:00000000ffdf0e14 type:MM_FILEPAGES val:33 [ 38.822635] BUG: Bad rss-counter state mm:00000000ffdf0e14 type:MM_ANONPAGES val:22 [ 38.963002] ================================================================== [ 38.963931] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.964872] Read of size 8 at addr ffff888019d49228 by task sshd/219 [ 38.965649] [ 38.965863] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.966890] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.967886] Call Trace: [ 38.968210] [ 38.968498] dump_stack_lvl+0x91/0xf0 [ 38.969026] print_report+0xcc/0x620 [ 38.969511] ? __virt_addr_valid+0x102/0x340 [ 38.970065] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.970694] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.971321] kasan_report+0xbe/0xf0 [ 38.971815] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.972441] vma_interval_tree_remove+0xc75/0xec0 [ 38.973038] vma_prepare+0xc54/0x11a0 [ 38.973518] __split_vma+0x5af/0x950 [ 38.973987] ? __pfx___split_vma+0x10/0x10 [ 38.974513] ? find_held_lock+0x2c/0x110 [ 38.975037] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.975607] ? lock_is_held_type+0x9f/0x120 [ 38.976146] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.976749] ? mtree_range_walk+0x632/0x900 [ 38.977300] ? mas_walk+0x5c7/0x7c0 [ 38.977784] do_vmi_munmap+0x1f1/0x2b0 [ 38.978280] mmap_region+0x1f9/0x2660 [ 38.978756] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.979265] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.979995] ? __pfx_lock_acquire+0x10/0x10 [ 38.980525] ? __pfx_mmap_region+0x10/0x10 [ 38.981053] ? security_mmap_addr+0x7d/0xa0 [ 38.981581] ? get_unmapped_area+0x1f5/0x3f0 [ 38.982127] do_mmap+0x854/0xf00 [ 38.982566] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.983065] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.983638] ksys_mmap_pgoff+0x3af/0x500 [ 38.984149] do_syscall_64+0x3f/0x90 [ 38.984627] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.985271] RIP: 0033:0x7fda8e33ad82 [ 38.985728] 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 [ 38.987877] RSP: 002b:00007ffce44dde68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.988776] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fda8e33ad82 [ 38.989618] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fda8d774000 [ 38.990474] RBP: 00007fda8d774000 R08: 0000000000000009 R09: 0000000000001000 [ 38.991318] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e4ae30bec0 [ 38.992170] R13: 00007ffce44dde80 R14: 00007ffce44ddeb0 R15: 00007ffce44de210 [ 38.993028] [ 38.993326] [ 38.993540] Allocated by task 212: [ 38.993974] kasan_save_stack+0x22/0x50 [ 38.994478] kasan_set_track+0x25/0x30 [ 38.994974] __kasan_slab_alloc+0x59/0x70 [ 38.995496] kmem_cache_alloc+0x16b/0x370 [ 38.996020] vm_area_dup+0x20/0x160 [ 38.996478] __split_vma+0x170/0x950 [ 38.996942] split_vma+0xc6/0x110 [ 38.997379] mprotect_fixup+0x8d2/0xb30 [ 38.997877] do_mprotect_pkey+0x87e/0xd40 [ 38.998396] __x64_sys_mprotect+0x78/0xc0 [ 38.998916] do_syscall_64+0x3f/0x90 [ 38.999390] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.000051] [ 39.000264] Freed by task 212: [ 39.000653] kasan_save_stack+0x22/0x50 [ 39.001155] kasan_set_track+0x25/0x30 [ 39.001646] kasan_save_free_info+0x2b/0x50 [ 39.002173] __kasan_slab_free+0x10a/0x190 [ 39.002706] kmem_cache_free+0x10d/0x4d0 [ 39.003222] rcu_core+0x8c8/0x2860 [ 39.003679] __do_softirq+0x1b7/0x7d4 [ 39.004159] [ 39.004374] Last potentially related work creation: [ 39.004963] kasan_save_stack+0x22/0x50 [ 39.005464] __kasan_record_aux_stack+0x8e/0xa0 [ 39.006033] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.006688] remove_vma+0x139/0x170 [ 39.007141] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.007787] do_vmi_munmap+0x1f1/0x2b0 [ 39.008272] __vm_munmap+0x138/0x3a0 [ 39.008737] __x64_sys_munmap+0x59/0x80 [ 39.009228] do_syscall_64+0x3f/0x90 [ 39.009708] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.010356] [ 39.010572] The buggy address belongs to the object at ffff888019d491d0 [ 39.010572] which belongs to the cache vm_area_struct of size 168 [ 39.012048] The buggy address is located 88 bytes inside of [ 39.012048] freed 168-byte region [ffff888019d491d0, ffff888019d49278) [ 39.013452] [ 39.013666] The buggy address belongs to the physical page: [ 39.014329] page:0000000032fc0836 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19d49 [ 39.015419] memcg:ffff888019d42401 [ 39.015863] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.016560] page_type: 0xffffffff() [ 39.017009] raw: 0100000000000200 ffff8880087a0c80 ffffea00006751c0 dead000000000003 [ 39.017921] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019d42401 [ 39.018825] page dumped because: kasan: bad access detected [ 39.019494] [ 39.019726] Memory state around the buggy address: [ 39.020315] ffff888019d49100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.021175] ffff888019d49180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 39.022049] >ffff888019d49200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 39.022904] ^ [ 39.023453] ffff888019d49280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 39.024312] ffff888019d49300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 39.025162] ================================================================== [ 39.026094] Disabling lock debugging due to kernel taint [ 41.039083] BUG: Bad rss-counter state mm:000000006bc5e418 type:MM_FILEPAGES val:33 [ 41.040080] BUG: Bad rss-counter state mm:000000006bc5e418 type:MM_ANONPAGES val:22 [ 41.507473] BUG: Bad rss-counter state mm:000000000f639a24 type:MM_FILEPAGES val:33 [ 41.508647] BUG: Bad rss-counter state mm:000000000f639a24 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33423' (ECDSA) to the list of known hosts. 2023/06/20 22:09:02 fuzzer started 2023/06/20 22:09:02 dialing manager at localhost:36067 2023/06/20 22:09:03 checking machine... 2023/06/20 22:09:03 checking revisions... [ 42.152688] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:09:03 testing simple program... [ 42.200321] cgroup: Unknown subsys name 'net' [ 42.253127] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:09:02 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007fe5cffe3da0 CR3=000000000c5ea000 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=6967f0a8fd0e9f96d84793c23f5a9ece XMM02=eff9b2d0a8fce9cb000000000011b5a8 XMM03=2c67c8bc2e329bc3000000000011b6d0 XMM04=80f0ab667cf6cf2f00000000000ae988 XMM05=0ef074493014d34f0000000000133128 XMM06=de7f7efdfba06f130000000000131b58 XMM07=fb795ef6d65770560000000000122070 XMM08=2c67c8bc2e329bc3000000000011b6d0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf35000 RCX=ffffffff812d8f13 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff88800fc4f408 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000be000000be0 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8135b960 RFL=00000216 [----AP-] 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 00007f7dbff72900 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=00007f7dc0529618 CR3=0000000019f56000 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