syzkaller login: [ 30.783715] sshd (213) used greatest stack depth: 24128 bytes left [ 30.785076] BUG: Bad rss-counter state mm:000000000056566e type:MM_FILEPAGES val:33 [ 30.786429] BUG: Bad rss-counter state mm:000000000056566e type:MM_ANONPAGES val:22 [ 30.970089] ================================================================== [ 30.971171] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.972176] Read of size 8 at addr ffff8880167ac228 by task sshd/222 [ 30.973221] [ 30.973571] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.974612] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.975788] Call Trace: [ 30.976108] [ 30.976385] dump_stack_lvl+0x91/0xf0 [ 30.976888] print_report+0xcc/0x620 [ 30.977363] ? __virt_addr_valid+0x102/0x340 [ 30.977926] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.978529] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.979174] kasan_report+0xbe/0xf0 [ 30.979653] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.980275] vma_interval_tree_remove+0xc75/0xec0 [ 30.980891] vma_prepare+0xc54/0x11a0 [ 30.981372] __split_vma+0x5af/0x950 [ 30.981857] ? __pfx___split_vma+0x10/0x10 [ 30.982376] ? find_held_lock+0x2c/0x110 [ 30.982939] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.983496] ? lock_is_held_type+0x9f/0x120 [ 30.984050] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.984660] ? mtree_range_walk+0x632/0x900 [ 30.985207] ? mas_walk+0x5c7/0x7c0 [ 30.985697] do_vmi_munmap+0x1f1/0x2b0 [ 30.986182] mmap_region+0x1f9/0x2660 [ 30.986672] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.987191] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.987909] ? __pfx_lock_acquire+0x10/0x10 [ 30.988433] ? __pfx_mmap_region+0x10/0x10 [ 30.988969] ? security_mmap_addr+0x7d/0xa0 [ 30.989496] ? get_unmapped_area+0x1f5/0x3f0 [ 30.990053] do_mmap+0x854/0xf00 [ 30.990491] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.991029] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.991588] ksys_mmap_pgoff+0x3af/0x500 [ 30.992098] do_syscall_64+0x3f/0x90 [ 30.992578] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.993240] RIP: 0033:0x7f495a0efd82 [ 30.993709] 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 [ 30.995840] RSP: 002b:00007ffe55829f38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.996739] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f495a0efd82 [ 30.997572] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4959529000 [ 30.998416] RBP: 00007f4959529000 R08: 0000000000000009 R09: 0000000000001000 [ 30.999277] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bb0eb42b20 [ 31.000124] R13: 00007ffe55829f50 R14: 00007ffe55829f80 R15: 00007ffe5582a2e0 [ 31.000982] [ 31.001271] [ 31.001484] Allocated by task 213: [ 31.001925] kasan_save_stack+0x22/0x50 [ 31.002421] kasan_set_track+0x25/0x30 [ 31.002943] __kasan_slab_alloc+0x59/0x70 [ 31.003457] kmem_cache_alloc+0x16b/0x370 [ 31.003980] vm_area_dup+0x20/0x160 [ 31.004430] __split_vma+0x170/0x950 [ 31.004912] split_vma+0xc6/0x110 [ 31.005346] mprotect_fixup+0x8d2/0xb30 [ 31.005861] do_mprotect_pkey+0x87e/0xd40 [ 31.006377] __x64_sys_mprotect+0x78/0xc0 [ 31.006925] do_syscall_64+0x3f/0x90 [ 31.007396] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.008054] [ 31.008267] Freed by task 13: [ 31.008654] kasan_save_stack+0x22/0x50 [ 31.009156] kasan_set_track+0x25/0x30 [ 31.009650] kasan_save_free_info+0x2b/0x50 [ 31.010182] __kasan_slab_free+0x10a/0x190 [ 31.010722] kmem_cache_free+0x10d/0x4d0 [ 31.011248] rcu_core+0x8c8/0x2860 [ 31.011703] __do_softirq+0x1b7/0x7d4 [ 31.012179] [ 31.012395] Last potentially related work creation: [ 31.012985] kasan_save_stack+0x22/0x50 [ 31.013490] __kasan_record_aux_stack+0x8e/0xa0 [ 31.014239] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.014920] remove_vma+0x139/0x170 [ 31.015365] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.015938] do_vmi_munmap+0x1f1/0x2b0 [ 31.016420] __vm_munmap+0x138/0x3a0 [ 31.016889] __x64_sys_munmap+0x59/0x80 [ 31.017376] do_syscall_64+0x3f/0x90 [ 31.017860] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.018495] [ 31.018725] The buggy address belongs to the object at ffff8880167ac1d0 [ 31.018725] which belongs to the cache vm_area_struct of size 168 [ 31.020208] The buggy address is located 88 bytes inside of [ 31.020208] freed 168-byte region [ffff8880167ac1d0, ffff8880167ac278) [ 31.021648] [ 31.021870] The buggy address belongs to the physical page: [ 31.022512] page:00000000d1b117ab refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x167ac [ 31.023637] memcg:ffff88800c92de01 [ 31.024066] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.024719] page_type: 0xffffffff() [ 31.025169] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.026091] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c92de01 [ 31.027015] page dumped because: kasan: bad access detected [ 31.027679] [ 31.027890] Memory state around the buggy address: [ 31.028481] ffff8880167ac100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.029337] ffff8880167ac180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.030200] >ffff8880167ac200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.031081] ^ [ 31.031642] ffff8880167ac280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.032501] ffff8880167ac300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.033351] ================================================================== [ 31.034295] Disabling lock debugging due to kernel taint [ 32.969984] BUG: Bad rss-counter state mm:0000000048893367 type:MM_FILEPAGES val:33 [ 32.970913] BUG: Bad rss-counter state mm:0000000048893367 type:MM_ANONPAGES val:22 [ 33.419061] BUG: Bad rss-counter state mm:000000000e19c4c3 type:MM_FILEPAGES val:33 [ 33.420030] BUG: Bad rss-counter state mm:000000000e19c4c3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48086' (ECDSA) to the list of known hosts. 2023/06/20 21:21:01 fuzzer started 2023/06/20 21:21:01 dialing manager at localhost:36067 2023/06/20 21:21:01 checking machine... 2023/06/20 21:21:01 checking revisions... [ 34.139177] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:21:01 testing simple program... [ 34.198521] cgroup: Unknown subsys name 'net' [ 34.269970] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:21:01 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=ffffffff860a1401 RDX=ffff88806ce09a98 RSI=ffffffff8451105e RDI=ffff88806ce09a98 RBP=ffff88806ce09b30 RSP=ffff88806ce09a80 R8 =ffffffff860a1444 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000792d R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff8880182a3680 R15=ffff88806ce09a98 RIP=ffffffff811305e8 RFL=00000202 [-------] 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 00007f6777df2900 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=00007fff66732000 CR3=000000000c91c000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007fa08f3b8008 CR3=000000000f4d6000 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=e73f1f4ffbddb597f34c80698a0050a7 XMM02=000000000011a568eff9b2d0a8fce9cb XMM03=000000000011a6382c67c8bc2e329bc3 XMM04=b31b041e0595b0aa00000000000ae988 XMM05=19e9129bd510f23500000000001319c0 XMM06=4edd0621c5993b3e0000000000130828 XMM07=e042d86d42eb936e0000000000121cc0 XMM08=e1091ff9738df8d0000000000011a638 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000