syzkaller login: [ 30.822160] BUG: Bad rss-counter state mm:00000000981ac83b type:MM_FILEPAGES val:33 [ 30.822996] BUG: Bad rss-counter state mm:00000000981ac83b type:MM_ANONPAGES val:22 [ 31.024654] ================================================================== [ 31.025271] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.025885] Read of size 8 at addr ffff88800ec8a228 by task sshd/222 [ 31.026389] [ 31.026535] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.027097] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.027719] Call Trace: [ 31.028016] [ 31.028201] dump_stack_lvl+0x91/0xf0 [ 31.028528] print_report+0xcc/0x620 [ 31.028851] ? __virt_addr_valid+0x102/0x340 [ 31.029218] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.032007] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.036021] kasan_report+0xbe/0xf0 [ 31.036355] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.036775] vma_interval_tree_remove+0xc75/0xec0 [ 31.037189] vma_prepare+0xc54/0x11a0 [ 31.037519] __split_vma+0x5af/0x950 [ 31.037847] ? __pfx___split_vma+0x10/0x10 [ 31.038203] ? find_held_lock+0x2c/0x110 [ 31.038548] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.038936] ? lock_is_held_type+0x9f/0x120 [ 31.039295] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.039688] ? mtree_range_walk+0x632/0x900 [ 31.040082] ? mas_walk+0x5c7/0x7c0 [ 31.040400] do_vmi_munmap+0x1f1/0x2b0 [ 31.040732] mmap_region+0x1f9/0x2660 [ 31.041049] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.041380] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.041822] ? __pfx_lock_acquire+0x10/0x10 [ 31.042157] ? __pfx_mmap_region+0x10/0x10 [ 31.042489] ? security_mmap_addr+0x7d/0xa0 [ 31.042820] ? get_unmapped_area+0x1f5/0x3f0 [ 31.043166] do_mmap+0x854/0xf00 [ 31.043433] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.043741] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.048066] ksys_mmap_pgoff+0x3af/0x500 [ 31.048404] do_syscall_64+0x3f/0x90 [ 31.048718] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.049134] RIP: 0033:0x7f758f8d8d82 [ 31.049435] 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 [ 31.050837] RSP: 002b:00007fff04cc1f08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.051426] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f758f8d8d82 [ 31.052013] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f758ed12000 [ 31.052558] RBP: 00007f758ed12000 R08: 0000000000000009 R09: 0000000000001000 [ 31.053102] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558f50622ec0 [ 31.055786] R13: 00007fff04cc1f20 R14: 00007fff04cc1f50 R15: 00007fff04cc22b0 [ 31.056331] [ 31.056511] [ 31.056650] Allocated by task 213: [ 31.056924] kasan_save_stack+0x22/0x50 [ 31.057237] kasan_set_track+0x25/0x30 [ 31.057546] __kasan_slab_alloc+0x59/0x70 [ 31.063862] kmem_cache_alloc+0x16b/0x370 [ 31.064205] vm_area_dup+0x20/0x160 [ 31.064503] __split_vma+0x170/0x950 [ 31.064812] split_vma+0xc6/0x110 [ 31.065114] mprotect_fixup+0x8d2/0xb30 [ 31.065460] do_mprotect_pkey+0x87e/0xd40 [ 31.065816] __x64_sys_mprotect+0x78/0xc0 [ 31.066171] do_syscall_64+0x3f/0x90 [ 31.066490] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.066919] [ 31.067072] Freed by task 213: [ 31.067332] kasan_save_stack+0x22/0x50 [ 31.067671] kasan_set_track+0x25/0x30 [ 31.068036] kasan_save_free_info+0x2b/0x50 [ 31.068395] __kasan_slab_free+0x10a/0x190 [ 31.068732] kmem_cache_free+0x10d/0x4d0 [ 31.069078] rcu_core+0x8c8/0x2860 [ 31.069383] __do_softirq+0x1b7/0x7d4 [ 31.069709] [ 31.069854] Last potentially related work creation: [ 31.070240] kasan_save_stack+0x22/0x50 [ 31.070574] __kasan_record_aux_stack+0x8e/0xa0 [ 31.070959] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.071395] remove_vma+0x139/0x170 [ 31.071706] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.072106] do_vmi_munmap+0x1f1/0x2b0 [ 31.072428] __vm_munmap+0x138/0x3a0 [ 31.072744] __x64_sys_munmap+0x59/0x80 [ 31.073081] do_syscall_64+0x3f/0x90 [ 31.073406] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.073844] [ 31.073994] The buggy address belongs to the object at ffff88800ec8a1d0 [ 31.073994] which belongs to the cache vm_area_struct of size 168 [ 31.074966] The buggy address is located 88 bytes inside of [ 31.074966] freed 168-byte region [ffff88800ec8a1d0, ffff88800ec8a278) [ 31.081720] [ 31.081870] The buggy address belongs to the physical page: [ 31.082307] page:000000008950a2fe refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xec8a [ 31.083036] memcg:ffff88800d854001 [ 31.083328] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.083770] page_type: 0xffffffff() [ 31.084069] raw: 0100000000000200 ffff8880087a0c80 ffffea000038bf00 dead000000000002 [ 31.084639] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d854001 [ 31.085188] page dumped because: kasan: bad access detected [ 31.085593] [ 31.085740] Memory state around the buggy address: [ 31.086102] ffff88800ec8a100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.086621] ffff88800ec8a180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.087139] >ffff88800ec8a200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.087673] ^ [ 31.088186] ffff88800ec8a280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.088728] ffff88800ec8a300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.089235] ================================================================== [ 31.089911] Disabling lock debugging due to kernel taint [ 33.796194] BUG: Bad rss-counter state mm:0000000097e14b2b type:MM_FILEPAGES val:33 [ 33.796943] BUG: Bad rss-counter state mm:0000000097e14b2b type:MM_ANONPAGES val:22 [ 34.537254] BUG: Bad rss-counter state mm:000000009e55bbe2 type:MM_FILEPAGES val:33 [ 34.537880] BUG: Bad rss-counter state mm:000000009e55bbe2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29988' (ECDSA) to the list of known hosts. 2023/06/21 00:12:17 fuzzer started 2023/06/21 00:12:17 dialing manager at localhost:36067 2023/06/21 00:12:17 checking machine... 2023/06/21 00:12:17 checking revisions... [ 35.145968] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:12:17 testing simple program... [ 35.187185] cgroup: Unknown subsys name 'net' [ 35.225471] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:12:17 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800cb4ff58 RCX=0000000000000000 RDX=ffff888018d78000 RSI=ffff888017e5b480 RDI=ffff88800f86d680 RBP=ffff88800f86d680 RSP=ffff88800cb4ff00 R8 =0000000000000000 R9 =ffffed1002fcb6a8 R10=ffff888017e5b543 R11=0000000000000000 R12=ffff888017e5b480 R13=ffff888017e5b540 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff818518b4 RFL=00000293 [--S-A-C] 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 00007f209099e900 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=00007f2090f560b0 CR3=000000001c9b8000 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=ffffffffffffffffffffffff00000000 XMM01=000000000000000000005500746f6f72 XMM02=ff000000000000000000000000000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=000a687361622f6e69622f3a746f6f72 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=0000000000000000 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff846014ea RBP=0000000000000000 RSP=ffff88800cb4fdc8 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000001 R12=0000000000000000 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff84601a78 RFL=00000046 [---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 00007f209099e900 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=00007fa69a9ee4e0 CR3=000000001c9b8000 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=a1b2e3df5b45cb98ae434b1272db5363 XMM02=2c67c8bc2e329bc3000000000011dd90 XMM03=fb795ef6d65770560000000000121a38 XMM04=cfffd57d3a6cfdbf00000000000ae988 XMM05=59d5b690e0af863b0000000000131990 XMM06=79b7f19adbad247d0000000000130a80 XMM07=e042d86d42eb936e0000000000121d10 XMM08=0db93d32569e05b7000000000011ddf0 XMM09=00000000000000000000000000000000 XMM10=00000000002000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000