syzkaller login: [ 31.953618] BUG: Bad rss-counter state mm:00000000c153905f type:MM_FILEPAGES val:33 [ 31.954873] BUG: Bad rss-counter state mm:00000000c153905f type:MM_ANONPAGES val:22 [ 31.994350] ================================================================== [ 31.995586] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.996826] Read of size 8 at addr ffff88800f781968 by task sshd/220 [ 31.997745] [ 31.998024] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.999077] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.000267] Call Trace: [ 32.000648] [ 32.000989] dump_stack_lvl+0x91/0xf0 [ 32.001567] print_report+0xcc/0x620 [ 32.002145] ? __virt_addr_valid+0x102/0x340 [ 32.002817] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.003498] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.004079] kasan_report+0xbe/0xf0 [ 32.004529] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.005116] vma_interval_tree_remove+0xc75/0xec0 [ 32.005690] vma_prepare+0xc54/0x11a0 [ 32.006146] __split_vma+0x5af/0x950 [ 32.006622] ? __pfx___split_vma+0x10/0x10 [ 32.007121] ? find_held_lock+0x2c/0x110 [ 32.007608] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.008134] ? lock_is_held_type+0x9f/0x120 [ 32.008638] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.009209] ? mtree_range_walk+0x632/0x900 [ 32.009725] ? mas_walk+0x5c7/0x7c0 [ 32.010171] do_vmi_munmap+0x1f1/0x2b0 [ 32.010640] mmap_region+0x1f9/0x2660 [ 32.011097] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.011580] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.012257] ? __pfx_lock_acquire+0x10/0x10 [ 32.012756] ? __pfx_mmap_region+0x10/0x10 [ 32.013255] ? security_mmap_addr+0x7d/0xa0 [ 32.013752] ? get_unmapped_area+0x1f5/0x3f0 [ 32.014280] do_mmap+0x854/0xf00 [ 32.014727] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.015239] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.015827] ksys_mmap_pgoff+0x3af/0x500 [ 32.016352] do_syscall_64+0x3f/0x90 [ 32.016843] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.017487] RIP: 0033:0x7fc19c63ed82 [ 32.017949] 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 [ 32.020097] RSP: 002b:00007ffd5bf99eb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.020999] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc19c63ed82 [ 32.021868] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc19ba78000 [ 32.022729] RBP: 00007fc19ba78000 R08: 0000000000000009 R09: 0000000000001000 [ 32.023566] R10: 0000000000000812 R11: 0000000000000206 R12: 00005654200bdb20 [ 32.024458] R13: 00007ffd5bf99ed0 R14: 00007ffd5bf99f00 R15: 00007ffd5bf9a260 [ 32.025355] [ 32.025660] [ 32.025889] Allocated by task 213: [ 32.026351] kasan_save_stack+0x22/0x50 [ 32.026882] kasan_set_track+0x25/0x30 [ 32.027399] __kasan_slab_alloc+0x59/0x70 [ 32.027950] kmem_cache_alloc+0x16b/0x370 [ 32.028493] vm_area_dup+0x20/0x160 [ 32.028961] __split_vma+0x170/0x950 [ 32.029432] split_vma+0xc6/0x110 [ 32.029872] mprotect_fixup+0x8d2/0xb30 [ 32.030372] do_mprotect_pkey+0x87e/0xd40 [ 32.030886] __x64_sys_mprotect+0x78/0xc0 [ 32.031398] do_syscall_64+0x3f/0x90 [ 32.031885] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.032526] [ 32.032739] Freed by task 213: [ 32.033127] kasan_save_stack+0x22/0x50 [ 32.033630] kasan_set_track+0x25/0x30 [ 32.034132] kasan_save_free_info+0x2b/0x50 [ 32.034683] __kasan_slab_free+0x10a/0x190 [ 32.035211] kmem_cache_free+0x10d/0x4d0 [ 32.035715] rcu_core+0x8c8/0x2860 [ 32.036158] __do_softirq+0x1b7/0x7d4 [ 32.036625] [ 32.036841] Last potentially related work creation: [ 32.037421] kasan_save_stack+0x22/0x50 [ 32.037921] __kasan_record_aux_stack+0x8e/0xa0 [ 32.038494] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.039137] remove_vma+0x139/0x170 [ 32.039580] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.040130] do_vmi_munmap+0x1f1/0x2b0 [ 32.040614] __vm_munmap+0x138/0x3a0 [ 32.041082] __x64_sys_munmap+0x59/0x80 [ 32.041579] do_syscall_64+0x3f/0x90 [ 32.042047] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.042700] [ 32.042916] The buggy address belongs to the object at ffff88800f781910 [ 32.042916] which belongs to the cache vm_area_struct of size 168 [ 32.044378] The buggy address is located 88 bytes inside of [ 32.044378] freed 168-byte region [ffff88800f781910, ffff88800f7819b8) [ 32.045811] [ 32.046035] The buggy address belongs to the physical page: [ 32.046743] page:000000004000de16 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf781 [ 32.047871] memcg:ffff88801a0cb801 [ 32.048315] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.049047] page_type: 0xffffffff() [ 32.049518] raw: 0100000000000200 ffff88800879fc80 ffffea00003d6880 dead000000000005 [ 32.050491] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a0cb801 [ 32.051430] page dumped because: kasan: bad access detected [ 32.052111] [ 32.052337] Memory state around the buggy address: [ 32.052939] ffff88800f781800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 32.053835] ffff88800f781880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 32.054723] >ffff88800f781900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.055605] ^ [ 32.056414] ffff88800f781980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 32.057302] ffff88800f781a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.058181] ================================================================== [ 32.059382] Disabling lock debugging due to kernel taint [ 33.820173] BUG: Bad rss-counter state mm:000000009ac6bd94 type:MM_FILEPAGES val:33 [ 33.820838] BUG: Bad rss-counter state mm:000000009ac6bd94 type:MM_ANONPAGES val:22 [ 34.315500] BUG: Bad rss-counter state mm:000000007a2fcba8 type:MM_FILEPAGES val:33 [ 34.316473] BUG: Bad rss-counter state mm:000000007a2fcba8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64187' (ECDSA) to the list of known hosts. 2023/06/19 18:16:11 fuzzer started 2023/06/19 18:16:12 dialing manager at localhost:44161 2023/06/19 18:16:12 checking machine... 2023/06/19 18:16:12 checking revisions... [ 34.972064] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:16:12 testing simple program... [ 35.032282] cgroup: Unknown subsys name 'net' [ 35.131272] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:16:11 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff8180ccf9 RCX=0000000000000001 RDX=1ffff11002ddaebb RSI=ffff888016ed7a98 RDI=ffffffff8180ccf9 RBP=ffffffff8180ccf9 RSP=ffff888016ed7538 R8 =0000000000000001 R9 =ffff888016ed75c0 R10=0000000000038001 R11=0000000000020fe6 R12=ffff888016ed7648 R13=0000000000000000 R14=ffff888018edb680 R15=000000008011000d RIP=ffffffff811fc6f0 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 00007f59195cd900 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=00007fff21e5d000 CR3=000000000e4ba000 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=ffff888008c58400 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=00007f649e8e38d0 CR3=0000000014572000 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=ab1e7d6a7bc3c4b4684cb329bfc96334 XMM02=ec2efd57dc4c00df000000000011fcb0 XMM03=b70fb308116e6b05000000000011fd80 XMM04=e82a1a5725c3905500000000000ae988 XMM05=19e9129bd510f2350000000000134038 XMM06=f98eaea42fcecb1f0000000000132ea0 XMM07=e042d86d42eb936e0000000000124708 XMM08=b70fb308116e6b05000000000011fd80 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000