syzkaller login: [ 31.632162] BUG: Bad rss-counter state mm:00000000d69b5f72 type:MM_FILEPAGES val:33 [ 31.633362] BUG: Bad rss-counter state mm:00000000d69b5f72 type:MM_ANONPAGES val:22 [ 31.742212] ================================================================== [ 31.743327] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.744315] Read of size 8 at addr ffff888016ab3b38 by task sshd/220 [ 31.744749] [ 31.744872] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.745361] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.745911] Call Trace: [ 31.746101] [ 31.746269] dump_stack_lvl+0x91/0xf0 [ 31.746547] print_report+0xcc/0x620 [ 31.746824] ? __virt_addr_valid+0x102/0x340 [ 31.747144] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.747495] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.747843] kasan_report+0xbe/0xf0 [ 31.748119] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.748468] vma_interval_tree_remove+0xc75/0xec0 [ 31.748805] vma_prepare+0xc54/0x11a0 [ 31.749077] __split_vma+0x5af/0x950 [ 31.749349] ? __pfx___split_vma+0x10/0x10 [ 31.749647] ? find_held_lock+0x2c/0x110 [ 31.749940] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.750257] ? lock_is_held_type+0x9f/0x120 [ 31.750557] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.750902] ? mtree_range_walk+0x632/0x900 [ 31.751235] ? mas_walk+0x5c7/0x7c0 [ 31.751512] do_vmi_munmap+0x1f1/0x2b0 [ 31.751806] mmap_region+0x1f9/0x2660 [ 31.752097] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.752410] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.752835] ? __pfx_lock_acquire+0x10/0x10 [ 31.753156] ? __pfx_mmap_region+0x10/0x10 [ 31.753470] ? security_mmap_addr+0x7d/0xa0 [ 31.753787] ? get_unmapped_area+0x1f5/0x3f0 [ 31.754122] do_mmap+0x854/0xf00 [ 31.754385] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.754685] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.755038] ksys_mmap_pgoff+0x3af/0x500 [ 31.755342] do_syscall_64+0x3f/0x90 [ 31.755630] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.756021] RIP: 0033:0x7f2d95641d82 [ 31.756294] 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 [ 31.757590] RSP: 002b:00007fffae79bb48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.758136] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2d95641d82 [ 31.758646] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2d94a7b000 [ 31.759173] RBP: 00007f2d94a7b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.759693] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cc3298ed90 [ 31.760203] R13: 00007fffae79bb60 R14: 00007fffae79bb90 R15: 00007fffae79bef0 [ 31.760723] [ 31.760902] [ 31.761035] Allocated by task 213: [ 31.761296] kasan_save_stack+0x22/0x50 [ 31.761599] kasan_set_track+0x25/0x30 [ 31.761896] __kasan_slab_alloc+0x59/0x70 [ 31.762208] kmem_cache_alloc+0x16b/0x370 [ 31.762516] vm_area_dup+0x20/0x160 [ 31.762792] __split_vma+0x170/0x950 [ 31.763091] split_vma+0xc6/0x110 [ 31.763351] mprotect_fixup+0x8d2/0xb30 [ 31.763649] do_mprotect_pkey+0x87e/0xd40 [ 31.763959] __x64_sys_mprotect+0x78/0xc0 [ 31.764277] do_syscall_64+0x3f/0x90 [ 31.764558] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.764946] [ 31.765075] Freed by task 213: [ 31.765319] kasan_save_stack+0x22/0x50 [ 31.765619] kasan_set_track+0x25/0x30 [ 31.765916] kasan_save_free_info+0x2b/0x50 [ 31.766229] __kasan_slab_free+0x10a/0x190 [ 31.766542] kmem_cache_free+0x10d/0x4d0 [ 31.766842] rcu_core+0x8c8/0x2860 [ 31.767117] __do_softirq+0x1b7/0x7d4 [ 31.767399] [ 31.767528] Last potentially related work creation: [ 31.767880] kasan_save_stack+0x22/0x50 [ 31.768183] __kasan_record_aux_stack+0x8e/0xa0 [ 31.768525] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.768907] remove_vma+0x139/0x170 [ 31.769181] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.769516] do_vmi_munmap+0x1f1/0x2b0 [ 31.769808] __vm_munmap+0x138/0x3a0 [ 31.770095] __x64_sys_munmap+0x59/0x80 [ 31.770390] do_syscall_64+0x3f/0x90 [ 31.770673] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.771065] [ 31.771193] The buggy address belongs to the object at ffff888016ab3ae0 [ 31.771193] which belongs to the cache vm_area_struct of size 168 [ 31.772078] The buggy address is located 88 bytes inside of [ 31.772078] freed 168-byte region [ffff888016ab3ae0, ffff888016ab3b88) [ 31.772924] [ 31.773053] The buggy address belongs to the physical page: [ 31.773464] page:00000000889cebdb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16ab3 [ 31.774119] memcg:ffff88801642ee01 [ 31.774373] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.774757] page_type: 0xffffffff() [ 31.775036] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.775586] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801642ee01 [ 31.776129] page dumped because: kasan: bad access detected [ 31.776527] [ 31.776653] Memory state around the buggy address: [ 31.777005] ffff888016ab3a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.777520] ffff888016ab3a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.778048] >ffff888016ab3b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.778573] ^ [ 31.778949] ffff888016ab3b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.779467] ffff888016ab3c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.779980] ================================================================== [ 31.780762] Disabling lock debugging due to kernel taint [ 34.033791] BUG: Bad rss-counter state mm:00000000200b633f type:MM_FILEPAGES val:33 [ 34.034831] BUG: Bad rss-counter state mm:00000000200b633f type:MM_ANONPAGES val:22 [ 34.564418] BUG: Bad rss-counter state mm:00000000a2119c2c type:MM_FILEPAGES val:33 [ 34.565561] BUG: Bad rss-counter state mm:00000000a2119c2c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39249' (ECDSA) to the list of known hosts. 2023/06/20 07:48:29 fuzzer started 2023/06/20 07:48:29 dialing manager at localhost:44161 2023/06/20 07:48:29 checking machine... 2023/06/20 07:48:29 checking revisions... [ 35.182087] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:48:30 testing simple program... [ 35.229443] cgroup: Unknown subsys name 'net' [ 35.265926] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:48:29 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=00007f42f557cf18 RCX=1ffffffff0ba72c0 RDX=0000000000000000 RSI=ffffffff81007b90 RDI=00007f42f557cf18 RBP=00007f42f557cf18 RSP=ffff888017d8f978 R8 =0000000000000007 R9 =ffffffffff600000 R10=00007f42f557c000 R11=00000000000b6996 R12=ffff888017d8faa0 R13=0000000000000000 R14=ffff88800c47b680 R15=dffffc0000000000 RIP=ffffffff813a0a6a 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 00007f42f5095900 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=00007f42f564d0b0 CR3=000000000e03a000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000003 RCX=1ffffffff0a9f109 RDX=0000000000000003 RSI=ffffffff8363dc3f RDI=ffffffff854f8848 RBP=0000000000000000 RSP=ffff888017d8fe80 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffffffff854f8820 R13=0000000000000009 R14=1ffff11002fb1fd1 R15=dffffc0000000000 RIP=ffffffff8363dc89 RFL=00000246 [---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 00007f42f5095900 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=00007fd17f8a5140 CR3=000000000e03a000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000