syzkaller login: [ 30.716337] BUG: Bad rss-counter state mm:00000000d30f7f1e type:MM_FILEPAGES val:33 [ 30.717089] BUG: Bad rss-counter state mm:00000000d30f7f1e type:MM_ANONPAGES val:22 [ 30.845322] ================================================================== [ 30.845931] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.846553] Read of size 8 at addr ffff888018e103f8 by task sshd/220 [ 30.847062] [ 30.847212] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.847790] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.848434] Call Trace: [ 30.848650] [ 30.848842] dump_stack_lvl+0x91/0xf0 [ 30.849170] print_report+0xcc/0x620 [ 30.849495] ? __virt_addr_valid+0x102/0x340 [ 30.850988] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.852287] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.853459] kasan_report+0xbe/0xf0 [ 30.854428] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.855681] vma_interval_tree_remove+0xc75/0xec0 [ 30.856911] vma_prepare+0xc54/0x11a0 [ 30.857861] __split_vma+0x5af/0x950 [ 30.858742] ? __pfx___split_vma+0x10/0x10 [ 30.859922] ? find_held_lock+0x2c/0x110 [ 30.860542] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.860912] ? lock_is_held_type+0x9f/0x120 [ 30.861253] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.861641] ? mtree_range_walk+0x632/0x900 [ 30.861989] ? mas_walk+0x5c7/0x7c0 [ 30.862292] do_vmi_munmap+0x1f1/0x2b0 [ 30.862604] mmap_region+0x1f9/0x2660 [ 30.862905] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.863226] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.863712] ? __pfx_lock_acquire+0x10/0x10 [ 30.864048] ? __pfx_mmap_region+0x10/0x10 [ 30.864381] ? security_mmap_addr+0x7d/0xa0 [ 30.864727] ? get_unmapped_area+0x1f5/0x3f0 [ 30.865096] do_mmap+0x854/0xf00 [ 30.865402] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.865753] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.866162] ksys_mmap_pgoff+0x3af/0x500 [ 30.866529] do_syscall_64+0x3f/0x90 [ 30.866847] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.867318] RIP: 0033:0x7f559680cd82 [ 30.867660] 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 [ 30.869168] RSP: 002b:00007ffca9f0ae88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.869815] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f559680cd82 [ 30.870406] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5595c46000 [ 30.871009] RBP: 00007f5595c46000 R08: 0000000000000009 R09: 0000000000001000 [ 30.871622] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c327281ec0 [ 30.872217] R13: 00007ffca9f0aea0 R14: 00007ffca9f0aed0 R15: 00007ffca9f0b230 [ 30.872797] [ 30.872990] [ 30.873157] Allocated by task 213: [ 30.873445] kasan_save_stack+0x22/0x50 [ 30.873838] kasan_set_track+0x25/0x30 [ 30.874192] __kasan_slab_alloc+0x59/0x70 [ 30.874587] kmem_cache_alloc+0x16b/0x370 [ 30.874946] vm_area_dup+0x20/0x160 [ 30.875277] __split_vma+0x170/0x950 [ 30.875648] split_vma+0xc6/0x110 [ 30.875938] mprotect_fixup+0x8d2/0xb30 [ 30.876307] do_mprotect_pkey+0x87e/0xd40 [ 30.876684] __x64_sys_mprotect+0x78/0xc0 [ 30.877072] do_syscall_64+0x3f/0x90 [ 30.877412] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.877870] [ 30.878032] Freed by task 213: [ 30.878361] kasan_save_stack+0x22/0x50 [ 30.878714] kasan_set_track+0x25/0x30 [ 30.879084] kasan_save_free_info+0x2b/0x50 [ 30.879436] __kasan_slab_free+0x10a/0x190 [ 30.879789] kmem_cache_free+0x10d/0x4d0 [ 30.880133] rcu_core+0x8c8/0x2860 [ 30.880437] __do_softirq+0x1b7/0x7d4 [ 30.880776] [ 30.880946] Last potentially related work creation: [ 30.881368] kasan_save_stack+0x22/0x50 [ 30.881732] __kasan_record_aux_stack+0x8e/0xa0 [ 30.882134] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.882590] remove_vma+0x139/0x170 [ 30.882904] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.883286] do_vmi_munmap+0x1f1/0x2b0 [ 30.883634] __vm_munmap+0x138/0x3a0 [ 30.883960] __x64_sys_munmap+0x59/0x80 [ 30.884310] do_syscall_64+0x3f/0x90 [ 30.884635] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.885046] [ 30.885190] The buggy address belongs to the object at ffff888018e103a0 [ 30.885190] which belongs to the cache vm_area_struct of size 168 [ 30.886104] The buggy address is located 88 bytes inside of [ 30.886104] freed 168-byte region [ffff888018e103a0, ffff888018e10448) [ 30.886980] [ 30.887118] The buggy address belongs to the physical page: [ 30.887553] page:000000009f4332c2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18e10 [ 30.888245] memcg:ffff888018fd7201 [ 30.888511] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.888917] page_type: 0xffffffff() [ 30.889204] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.889777] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018fd7201 [ 30.890348] page dumped because: kasan: bad access detected [ 30.890760] [ 30.890892] Memory state around the buggy address: [ 30.891244] ffff888018e10280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.892011] ffff888018e10300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.892536] >ffff888018e10380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.893131] ^ [ 30.893685] ffff888018e10400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.894240] ffff888018e10480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.894803] ================================================================== [ 30.895393] Disabling lock debugging due to kernel taint [ 32.470454] BUG: Bad rss-counter state mm:00000000237344d8 type:MM_FILEPAGES val:33 [ 32.471101] BUG: Bad rss-counter state mm:00000000237344d8 type:MM_ANONPAGES val:22 [ 32.825442] BUG: Bad rss-counter state mm:000000009625ce55 type:MM_FILEPAGES val:33 [ 32.826246] BUG: Bad rss-counter state mm:000000009625ce55 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26820' (ECDSA) to the list of known hosts. 2023/06/21 00:05:13 fuzzer started 2023/06/21 00:05:13 dialing manager at localhost:36067 2023/06/21 00:05:13 checking machine... 2023/06/21 00:05:13 checking revisions... [ 33.370669] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:05:13 testing simple program... [ 33.421031] cgroup: Unknown subsys name 'net' [ 33.461246] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:05:13 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff863b356c RDX=0000000000000001 RSI=0000000000000000 RDI=ffffffff863b356e RBP=ffff88800daef880 RSP=ffff88800daef7b8 R8 =0000000000000001 R9 =ffff88800daef868 R10=0000000000038001 R11=000000000008a966 R12=ffff88800daef888 R13=ffff88800daef870 R14=ffff88800daeff20 R15=ffff88800daef828 RIP=ffffffff81131204 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 00007f63cd1c9900 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=00007ffee07e5000 CR3=000000001c2a8000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8562be78 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000018 RSI=ffffffff87b6c4d8 RDI=ffffffff8562bed0 RBP=ffff88806cf09db8 RSP=ffff88806cf09ce8 R8 =00000018005b99b3 R9 =000000166403b6d0 R10=ffffffffffffffff R11=ffffffff85497f20 R12=00000000005b99b3 R13=003b9aca00000000 R14=ffffffff85497f20 R15=0000000000000000 RIP=ffffffff84513104 RFL=00000006 [-----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 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=00007f0ea57339c0 CR3=000000000c678000 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=38160a5f3ff548b1e34f5f57ec3e3a67 XMM02=2c67c8bc2e329bc3000000000011cdd8 XMM03=fb795ef6d65770560000000000121578 XMM04=0264fcee3d11dd7000000000000ae988 XMM05=19e9129bd510f23500000000001313c8 XMM06=879a4036f7b6e1ba0000000000130230 XMM07=e042d86d42eb936e00000000001217f8 XMM08=bb51d06e53ef641a000000000011ce38 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000