syzkaller login: [ 33.289858] BUG: Bad rss-counter state mm:00000000d47aaa22 type:MM_FILEPAGES val:33 [ 33.291330] BUG: Bad rss-counter state mm:00000000d47aaa22 type:MM_ANONPAGES val:22 [ 33.442341] ================================================================== [ 33.443492] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.444836] Read of size 8 at addr ffff8880165d36b0 by task sshd/220 [ 33.445801] [ 33.446074] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.447294] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.448524] Call Trace: [ 33.448922] [ 33.449274] dump_stack_lvl+0x91/0xf0 [ 33.449888] print_report+0xcc/0x620 [ 33.450500] ? __virt_addr_valid+0x102/0x340 [ 33.451216] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.451992] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.452773] kasan_report+0xbe/0xf0 [ 33.453394] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.454196] vma_interval_tree_remove+0xc75/0xec0 [ 33.454971] vma_prepare+0xc54/0x11a0 [ 33.455616] __split_vma+0x5af/0x950 [ 33.456222] ? __pfx___split_vma+0x10/0x10 [ 33.456811] ? find_held_lock+0x2c/0x110 [ 33.457377] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.457986] ? lock_is_held_type+0x9f/0x120 [ 33.458571] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.459239] ? mtree_range_walk+0x632/0x900 [ 33.459832] ? mas_walk+0x5c7/0x7c0 [ 33.460345] do_vmi_munmap+0x1f1/0x2b0 [ 33.460881] mmap_region+0x1f9/0x2660 [ 33.461413] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.461963] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.462735] ? __pfx_lock_acquire+0x10/0x10 [ 33.463312] ? __pfx_mmap_region+0x10/0x10 [ 33.463887] ? security_mmap_addr+0x7d/0xa0 [ 33.464460] ? get_unmapped_area+0x1f5/0x3f0 [ 33.465050] do_mmap+0x854/0xf00 [ 33.465524] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.466055] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.466661] ksys_mmap_pgoff+0x3af/0x500 [ 33.467225] do_syscall_64+0x3f/0x90 [ 33.467742] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.468437] RIP: 0033:0x7f37df7c5d82 [ 33.468957] 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 [ 33.471306] RSP: 002b:00007ffc76d75f88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.472308] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f37df7c5d82 [ 33.473244] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f37debff000 [ 33.474186] RBP: 00007f37debff000 R08: 0000000000000009 R09: 0000000000001000 [ 33.475119] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563079dcfec0 [ 33.476075] R13: 00007ffc76d75fa0 R14: 00007ffc76d75fd0 R15: 00007ffc76d76330 [ 33.477018] [ 33.477337] [ 33.477574] Allocated by task 213: [ 33.478041] kasan_save_stack+0x22/0x50 [ 33.478593] kasan_set_track+0x25/0x30 [ 33.479134] __kasan_slab_alloc+0x59/0x70 [ 33.479719] kmem_cache_alloc+0x16b/0x370 [ 33.480287] vm_area_dup+0x20/0x160 [ 33.480790] __split_vma+0x170/0x950 [ 33.481304] split_vma+0xc6/0x110 [ 33.481786] mprotect_fixup+0x8d2/0xb30 [ 33.482339] do_mprotect_pkey+0x87e/0xd40 [ 33.482913] __x64_sys_mprotect+0x78/0xc0 [ 33.483494] do_syscall_64+0x3f/0x90 [ 33.484016] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.484719] [ 33.484958] Freed by task 213: [ 33.485394] kasan_save_stack+0x22/0x50 [ 33.486026] kasan_set_track+0x25/0x30 [ 33.486568] kasan_save_free_info+0x2b/0x50 [ 33.487153] __kasan_slab_free+0x10a/0x190 [ 33.487748] kmem_cache_free+0x10d/0x4d0 [ 33.488309] rcu_core+0x8c8/0x2860 [ 33.488799] __do_softirq+0x1b7/0x7d4 [ 33.489317] [ 33.489550] Last potentially related work creation: [ 33.490178] kasan_save_stack+0x22/0x50 [ 33.490735] __kasan_record_aux_stack+0x8e/0xa0 [ 33.491383] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.492088] remove_vma+0x139/0x170 [ 33.492589] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.493198] do_vmi_munmap+0x1f1/0x2b0 [ 33.493737] __vm_munmap+0x138/0x3a0 [ 33.494250] __x64_sys_munmap+0x59/0x80 [ 33.494792] do_syscall_64+0x3f/0x90 [ 33.495313] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.496017] [ 33.496249] The buggy address belongs to the object at ffff8880165d3658 [ 33.496249] which belongs to the cache vm_area_struct of size 168 [ 33.497865] The buggy address is located 88 bytes inside of [ 33.497865] freed 168-byte region [ffff8880165d3658, ffff8880165d3700) [ 33.499419] [ 33.499657] The buggy address belongs to the physical page: [ 33.500361] page:0000000065f3030c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x165d3 [ 33.501557] memcg:ffff88800fbf0c01 [ 33.502028] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.502752] page_type: 0xffffffff() [ 33.503260] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.504294] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fbf0c01 [ 33.505295] page dumped because: kasan: bad access detected [ 33.506012] [ 33.506249] Memory state around the buggy address: [ 33.506887] ffff8880165d3580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.507855] ffff8880165d3600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 33.508802] >ffff8880165d3680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.509743] ^ [ 33.510380] ffff8880165d3700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 33.511331] ffff8880165d3780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 33.512268] ================================================================== [ 33.513531] Disabling lock debugging due to kernel taint [ 35.823816] BUG: Bad rss-counter state mm:00000000b16cc3b8 type:MM_FILEPAGES val:33 [ 35.825006] BUG: Bad rss-counter state mm:00000000b16cc3b8 type:MM_ANONPAGES val:22 [ 36.311470] BUG: Bad rss-counter state mm:00000000cca27d23 type:MM_FILEPAGES val:33 [ 36.312539] BUG: Bad rss-counter state mm:00000000cca27d23 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37789' (ECDSA) to the list of known hosts. 2023/06/19 18:22:23 fuzzer started 2023/06/19 18:22:23 dialing manager at localhost:44161 2023/06/19 18:22:23 checking machine... 2023/06/19 18:22:23 checking revisions... [ 37.025848] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:22:23 testing simple program... [ 37.075996] cgroup: Unknown subsys name 'net' [ 37.113367] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:22:20 Registers: info registers vcpu 0 RAX=fffffffffffffe10 RBX=000055985f6cfb20 RCX=0000000000000020 RDX=0000000000000000 RSI=0000000000000023 RDI=000055985f6cfb20 RBP=000000000000000c RSP=00007ffe27f31948 R8 =000055985f6fb957 R9 =00007f723b463be0 R10=000000000000006f R11=0000000000000246 R12=000055985f6ecf70 R13=00007ffe27f31958 R14=00007f723ae8cb22 R15=00007f723aeb1710 RIP=00007f723b2d9ab7 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f723aeb1900 00000000 00000000 GS =0000 0000000000000000 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=00007f723b466650 CR3=0000000019e3e000 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=23232323232323232323232323232323 XMM01=000000ffff0000000000000000000000 XMM02=000000ffff0000000000000000000000 XMM03=6c6c6568732065687420666f20656d61 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffff0000ffffffffffffffffff XMM08=687320000075730909454d414e5f5553 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf35000 RCX=ffffffff8118df51 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000006bf1 RSP=ffff88806cf09c18 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=ffff88806cf09ff8 R12=0000000000000009 R13=ffff88806cf3a2c0 R14=1ffff1100d9e139c R15=0000000000000000 RIP=ffffffff8135b910 RFL=00000016 [----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 00007f903e543900 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=00007f903d977f00 CR3=000000000ed1a000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=79157a0d126775c000000000000ae988 XMM05=2ab04ffa47f8ae6700000000001353f0 XMM06=e4cb8bb95a7664b60000000000134288 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000