syzkaller login: [ 42.005732] BUG: Bad rss-counter state mm:00000000065a7586 type:MM_FILEPAGES val:33 [ 42.007567] BUG: Bad rss-counter state mm:00000000065a7586 type:MM_ANONPAGES val:22 [ 42.166017] ================================================================== [ 42.166933] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.167861] Read of size 8 at addr ffff888006833968 by task sshd/218 [ 42.168635] [ 42.168850] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.169836] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.170804] Call Trace: [ 42.171130] [ 42.171420] dump_stack_lvl+0x91/0xf0 [ 42.171908] print_report+0xcc/0x620 [ 42.172390] ? __virt_addr_valid+0x102/0x340 [ 42.172934] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.173565] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.174187] kasan_report+0xbe/0xf0 [ 42.174668] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.175286] vma_interval_tree_remove+0xc75/0xec0 [ 42.175881] vma_prepare+0xc54/0x11a0 [ 42.176352] __split_vma+0x5af/0x950 [ 42.176816] ? __pfx___split_vma+0x10/0x10 [ 42.177332] ? find_held_lock+0x2c/0x110 [ 42.177853] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.178411] ? lock_is_held_type+0x9f/0x120 [ 42.178935] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.179529] ? mtree_range_walk+0x632/0x900 [ 42.180068] ? mas_walk+0x5c7/0x7c0 [ 42.180529] do_vmi_munmap+0x1f1/0x2b0 [ 42.181018] mmap_region+0x1f9/0x2660 [ 42.181510] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.182020] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.182722] ? __pfx_lock_acquire+0x10/0x10 [ 42.183243] ? __pfx_mmap_region+0x10/0x10 [ 42.183775] ? security_mmap_addr+0x7d/0xa0 [ 42.184310] ? get_unmapped_area+0x1f5/0x3f0 [ 42.184858] do_mmap+0x854/0xf00 [ 42.185294] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.185797] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.186356] ksys_mmap_pgoff+0x3af/0x500 [ 42.186863] do_syscall_64+0x3f/0x90 [ 42.187336] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.187973] RIP: 0033:0x7f5e76003d82 [ 42.188418] 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 [ 42.190528] RSP: 002b:00007ffd2cbe73c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.191437] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5e76003d82 [ 42.192274] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5e7543d000 [ 42.193111] RBP: 00007f5e7543d000 R08: 0000000000000009 R09: 0000000000001000 [ 42.193961] R10: 0000000000000812 R11: 0000000000000206 R12: 000055be96c9cec0 [ 42.194810] R13: 00007ffd2cbe73e0 R14: 00007ffd2cbe7410 R15: 00007ffd2cbe7770 [ 42.195647] [ 42.195935] [ 42.196152] Allocated by task 211: [ 42.196573] kasan_save_stack+0x22/0x50 [ 42.197067] kasan_set_track+0x25/0x30 [ 42.197563] __kasan_slab_alloc+0x59/0x70 [ 42.198078] kmem_cache_alloc+0x16b/0x370 [ 42.198587] vm_area_dup+0x20/0x160 [ 42.199031] __split_vma+0x170/0x950 [ 42.199484] split_vma+0xc6/0x110 [ 42.199918] mprotect_fixup+0x8d2/0xb30 [ 42.200411] do_mprotect_pkey+0x87e/0xd40 [ 42.200931] __x64_sys_mprotect+0x78/0xc0 [ 42.201450] do_syscall_64+0x3f/0x90 [ 42.201939] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.202577] [ 42.202791] Freed by task 211: [ 42.203180] kasan_save_stack+0x22/0x50 [ 42.203677] kasan_set_track+0x25/0x30 [ 42.204167] kasan_save_free_info+0x2b/0x50 [ 42.204692] __kasan_slab_free+0x10a/0x190 [ 42.205217] kmem_cache_free+0x10d/0x4d0 [ 42.205727] rcu_core+0x8c8/0x2860 [ 42.206169] __do_softirq+0x1b7/0x7d4 [ 42.206644] [ 42.206859] Last potentially related work creation: [ 42.207437] kasan_save_stack+0x22/0x50 [ 42.207929] __kasan_record_aux_stack+0x8e/0xa0 [ 42.208490] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.209126] remove_vma+0x139/0x170 [ 42.209579] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.210128] do_vmi_munmap+0x1f1/0x2b0 [ 42.210607] __vm_munmap+0x138/0x3a0 [ 42.211069] __x64_sys_munmap+0x59/0x80 [ 42.211562] do_syscall_64+0x3f/0x90 [ 42.212031] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.212659] [ 42.212878] The buggy address belongs to the object at ffff888006833910 [ 42.212878] which belongs to the cache vm_area_struct of size 168 [ 42.214331] The buggy address is located 88 bytes inside of [ 42.214331] freed 168-byte region [ffff888006833910, ffff8880068339b8) [ 42.215724] [ 42.215941] The buggy address belongs to the physical page: [ 42.216626] page:00000000511d4bd5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x6833 [ 42.217757] memcg:ffff8880145abc01 [ 42.218194] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 42.218912] page_type: 0xffffffff() [ 42.219380] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 42.220333] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880145abc01 [ 42.221274] page dumped because: kasan: bad access detected [ 42.221981] [ 42.222203] Memory state around the buggy address: [ 42.222807] ffff888006833800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 42.223702] ffff888006833880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 42.224597] >ffff888006833900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.225476] ^ [ 42.226300] ffff888006833980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 42.227184] ffff888006833a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 42.228064] ================================================================== [ 42.229072] Disabling lock debugging due to kernel taint [ 44.195927] BUG: Bad rss-counter state mm:00000000e6ba0685 type:MM_FILEPAGES val:33 [ 44.197184] BUG: Bad rss-counter state mm:00000000e6ba0685 type:MM_ANONPAGES val:22 [ 44.705695] BUG: Bad rss-counter state mm:00000000a7b74629 type:MM_FILEPAGES val:33 [ 44.706905] BUG: Bad rss-counter state mm:00000000a7b74629 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56430' (ECDSA) to the list of known hosts. 2023/06/19 18:04:42 fuzzer started 2023/06/19 18:04:42 dialing manager at localhost:44161 2023/06/19 18:04:42 checking machine... 2023/06/19 18:04:42 checking revisions... [ 45.354575] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:04:43 testing simple program... [ 45.402185] cgroup: Unknown subsys name 'net' [ 45.440950] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:04:39 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffd4e5e37c8 CR3=0000000005482000 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=00007f252ad32510000055e095986790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff11003067e49 RSI=ffffffff816cb49b RDI=ffff88801833f2b8 RBP=ffff88801833f288 RSP=ffff88801833f1e8 R8 =0000000000000001 R9 =ffff88801833f230 R10=0000000000038001 R11=0000000000020d78 R12=ffff88801833f2b8 R13=0000000000000000 R14=ffff888009dc9b40 R15=0000000000001000 RIP=ffffffff813ad42e 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 00007f23ac3c3900 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=00007f23ac97a618 CR3=0000000016142000 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