syzkaller login: [ 30.413953] BUG: Bad rss-counter state mm:00000000b1ff5847 type:MM_FILEPAGES val:33 [ 30.415249] BUG: Bad rss-counter state mm:00000000b1ff5847 type:MM_ANONPAGES val:22 [ 30.453317] ================================================================== [ 30.454330] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.455281] Read of size 8 at addr ffff888018e5eed8 by task sshd/220 [ 30.456156] [ 30.456372] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.457233] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.458228] Call Trace: [ 30.458544] [ 30.458827] dump_stack_lvl+0x91/0xf0 [ 30.459327] print_report+0xcc/0x620 [ 30.459813] ? __virt_addr_valid+0x102/0x340 [ 30.460370] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.460988] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.461597] kasan_report+0xbe/0xf0 [ 30.462074] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.462684] vma_interval_tree_remove+0xc75/0xec0 [ 30.463294] vma_prepare+0xc54/0x11a0 [ 30.463781] __split_vma+0x5af/0x950 [ 30.464249] ? __pfx___split_vma+0x10/0x10 [ 30.464777] ? find_held_lock+0x2c/0x110 [ 30.465301] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.465861] ? lock_is_held_type+0x9f/0x120 [ 30.466404] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.467037] ? mtree_range_walk+0x632/0x900 [ 30.467591] ? mas_walk+0x5c7/0x7c0 [ 30.468063] do_vmi_munmap+0x1f1/0x2b0 [ 30.468555] mmap_region+0x1f9/0x2660 [ 30.469036] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.469560] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.470270] ? __pfx_lock_acquire+0x10/0x10 [ 30.470804] ? __pfx_mmap_region+0x10/0x10 [ 30.471340] ? security_mmap_addr+0x7d/0xa0 [ 30.471872] ? get_unmapped_area+0x1f5/0x3f0 [ 30.472417] do_mmap+0x854/0xf00 [ 30.472854] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.473345] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.473899] ksys_mmap_pgoff+0x3af/0x500 [ 30.474405] do_syscall_64+0x3f/0x90 [ 30.474879] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.475536] RIP: 0033:0x7f5d01fe5d82 [ 30.475990] 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 [ 30.478161] RSP: 002b:00007ffc0e16c3f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.479124] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5d01fe5d82 [ 30.479976] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5d0141f000 [ 30.480821] RBP: 00007f5d0141f000 R08: 0000000000000009 R09: 0000000000001000 [ 30.481665] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f344404ec0 [ 30.482509] R13: 00007ffc0e16c410 R14: 00007ffc0e16c440 R15: 00007ffc0e16c7a0 [ 30.483382] [ 30.483678] [ 30.483898] Allocated by task 213: [ 30.484345] kasan_save_stack+0x22/0x50 [ 30.484868] kasan_set_track+0x25/0x30 [ 30.485375] __kasan_slab_alloc+0x59/0x70 [ 30.485908] kmem_cache_alloc+0x16b/0x370 [ 30.486447] vm_area_dup+0x20/0x160 [ 30.486917] __split_vma+0x170/0x950 [ 30.487411] split_vma+0xc6/0x110 [ 30.487863] mprotect_fixup+0x8d2/0xb30 [ 30.488387] do_mprotect_pkey+0x87e/0xd40 [ 30.488922] __x64_sys_mprotect+0x78/0xc0 [ 30.489462] do_syscall_64+0x3f/0x90 [ 30.489956] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.490620] [ 30.490840] Freed by task 213: [ 30.491259] kasan_save_stack+0x22/0x50 [ 30.491782] kasan_set_track+0x25/0x30 [ 30.492290] kasan_save_free_info+0x2b/0x50 [ 30.492840] __kasan_slab_free+0x10a/0x190 [ 30.493396] kmem_cache_free+0x10d/0x4d0 [ 30.493916] rcu_core+0x8c8/0x2860 [ 30.494378] __do_softirq+0x1b7/0x7d4 [ 30.494876] [ 30.495112] Last potentially related work creation: [ 30.495724] kasan_save_stack+0x22/0x50 [ 30.496242] __kasan_record_aux_stack+0x8e/0xa0 [ 30.496831] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.497491] remove_vma+0x139/0x170 [ 30.497960] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.498532] do_vmi_munmap+0x1f1/0x2b0 [ 30.499046] __vm_munmap+0x138/0x3a0 [ 30.499523] __x64_sys_munmap+0x59/0x80 [ 30.500031] do_syscall_64+0x3f/0x90 [ 30.500528] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.501198] [ 30.501424] The buggy address belongs to the object at ffff888018e5ee80 [ 30.501424] which belongs to the cache vm_area_struct of size 168 [ 30.502949] The buggy address is located 88 bytes inside of [ 30.502949] freed 168-byte region [ffff888018e5ee80, ffff888018e5ef28) [ 30.504408] [ 30.504628] The buggy address belongs to the physical page: [ 30.505314] page:00000000b49af220 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18e5e [ 30.506447] memcg:ffff88800c618f01 [ 30.506884] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.507564] page_type: 0xffffffff() [ 30.508029] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.508992] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c618f01 [ 30.509937] page dumped because: kasan: bad access detected [ 30.510626] [ 30.510852] Memory state around the buggy address: [ 30.511469] ffff888018e5ed80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.512351] ffff888018e5ee00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.513248] >ffff888018e5ee80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.514121] ^ [ 30.514883] ffff888018e5ef00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.515781] ffff888018e5ef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.516659] ================================================================== [ 30.517722] Disabling lock debugging due to kernel taint [ 32.335433] BUG: Bad rss-counter state mm:000000001d642d1d type:MM_FILEPAGES val:33 [ 32.336618] BUG: Bad rss-counter state mm:000000001d642d1d type:MM_ANONPAGES val:22 [ 32.728292] BUG: Bad rss-counter state mm:00000000c0311cd4 type:MM_FILEPAGES val:33 [ 32.729052] BUG: Bad rss-counter state mm:00000000c0311cd4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31144' (ECDSA) to the list of known hosts. 2023/06/20 15:35:12 fuzzer started 2023/06/20 15:35:12 dialing manager at localhost:36067 2023/06/20 15:35:12 checking machine... 2023/06/20 15:35:12 checking revisions... [ 33.375275] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:35:12 testing simple program... [ 33.420042] cgroup: Unknown subsys name 'net' [ 33.457877] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:35:12 Registers: info registers vcpu 0 RAX=ffffffff814c8454 RBX=ffffffff85652b60 RCX=ffffffff814c84a1 RDX=ffff888016419b40 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88800f19f668 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=00007f3dfc2e6e07 R13=0000000000000000 R14=ffff888016419b40 R15=0000000000000005 RIP=ffffffff814c84a2 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 00007f3dfb754900 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=00005607b9089b88 CR3=000000000c5cc000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00005637f2709360 RBX=00005637f2709620 RCX=00000000000001b0 RDX=00005637f2709658 RSI=00005637f2709620 RDI=00005637f2706c70 RBP=0000000000000001 RSP=00007ffef5b09938 R8 =0000000000000020 R9 =00007ffef5b49080 R10=00007ffef5b490f0 R11=000000000000db34 R12=0000000000000001 R13=000000000000000c R14=00007ffef5b09990 R15=0000000000000000 RIP=00007f9533d15980 RFL=00000202 [-------] 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 00007f9533223900 00000000 00000000 GS =0000 0000000000000000 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=00007f3dfb63b000 CR3=000000000d58a000 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=80d357a3b3e3d9b04f4f66f5fd24c5bf XMM02=ec2efd57dc4c00df000000000011abd8 XMM03=495add28ccf96ccd000000000011aca8 XMM04=f89166b27691f46900000000000ae988 XMM05=1319e678c5640f8a00000000001329f0 XMM06=94aac670ef06ff650000000000132958 XMM07=58f17c1affdc82d60000000000123148 XMM08=406589be3f9c4b220000000000122fb0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000