syzkaller login: [ 107.417272] BUG: Bad rss-counter state mm:00000000b0323663 type:MM_FILEPAGES val:33 [ 107.418694] BUG: Bad rss-counter state mm:00000000b0323663 type:MM_ANONPAGES val:22 [ 107.559359] ================================================================== [ 107.560274] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 107.561204] Read of size 8 at addr ffff88800c5de6b0 by task sshd/220 [ 107.562144] [ 107.562364] CPU: 1 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 107.563386] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 107.564377] Call Trace: [ 107.564696] [ 107.564987] dump_stack_lvl+0x91/0xf0 [ 107.565478] print_report+0xcc/0x620 [ 107.565962] ? __virt_addr_valid+0x102/0x340 [ 107.566537] ? vma_interval_tree_remove+0xc75/0xec0 [ 107.567153] ? vma_interval_tree_remove+0xc75/0xec0 [ 107.567788] kasan_report+0xbe/0xf0 [ 107.568264] ? vma_interval_tree_remove+0xc75/0xec0 [ 107.568877] vma_interval_tree_remove+0xc75/0xec0 [ 107.569486] vma_prepare+0xc54/0x11a0 [ 107.569964] __split_vma+0x5af/0x950 [ 107.570453] ? __pfx___split_vma+0x10/0x10 [ 107.570985] ? find_held_lock+0x2c/0x110 [ 107.571500] do_vmi_align_munmap+0x2ba/0x11f0 [ 107.572056] ? lock_is_held_type+0x9f/0x120 [ 107.572600] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 107.573213] ? mtree_range_walk+0x632/0x900 [ 107.573763] ? mas_walk+0x5c7/0x7c0 [ 107.574252] do_vmi_munmap+0x1f1/0x2b0 [ 107.574743] mmap_region+0x1f9/0x2660 [ 107.575225] ? vm_mmap_pgoff+0x15c/0x3a0 [ 107.575738] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 107.576457] ? __pfx_lock_acquire+0x10/0x10 [ 107.576986] ? __pfx_mmap_region+0x10/0x10 [ 107.577513] ? security_mmap_addr+0x7d/0xa0 [ 107.578034] ? get_unmapped_area+0x1f5/0x3f0 [ 107.578596] do_mmap+0x854/0xf00 [ 107.579032] vm_mmap_pgoff+0x1a6/0x3a0 [ 107.579519] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 107.580072] ksys_mmap_pgoff+0x3af/0x500 [ 107.580576] do_syscall_64+0x3f/0x90 [ 107.581050] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 107.581686] RIP: 0033:0x7f96de994d82 [ 107.582146] 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 [ 107.584236] RSP: 002b:00007ffc255a1488 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 107.585129] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f96de994d82 [ 107.585973] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f96dddce000 [ 107.586832] RBP: 00007f96dddce000 R08: 0000000000000009 R09: 0000000000001000 [ 107.587678] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562637f3ad90 [ 107.588518] R13: 00007ffc255a14a0 R14: 00007ffc255a14d0 R15: 00007ffc255a1830 [ 107.589369] [ 107.589658] [ 107.589871] Allocated by task 213: [ 107.590305] kasan_save_stack+0x22/0x50 [ 107.590810] kasan_set_track+0x25/0x30 [ 107.591305] __kasan_slab_alloc+0x59/0x70 [ 107.591827] kmem_cache_alloc+0x16b/0x370 [ 107.592334] vm_area_dup+0x20/0x160 [ 107.592790] __split_vma+0x170/0x950 [ 107.593254] split_vma+0xc6/0x110 [ 107.593687] mprotect_fixup+0x8d2/0xb30 [ 107.594197] do_mprotect_pkey+0x87e/0xd40 [ 107.594707] __x64_sys_mprotect+0x78/0xc0 [ 107.595220] do_syscall_64+0x3f/0x90 [ 107.595689] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 107.596320] [ 107.596534] Freed by task 203: [ 107.596920] kasan_save_stack+0x22/0x50 [ 107.597416] kasan_set_track+0x25/0x30 [ 107.597914] kasan_save_free_info+0x2b/0x50 [ 107.598456] __kasan_slab_free+0x10a/0x190 [ 107.598984] kmem_cache_free+0x10d/0x4d0 [ 107.599490] rcu_core+0x8c8/0x2860 [ 107.599935] __do_softirq+0x1b7/0x7d4 [ 107.600403] [ 107.600617] Last potentially related work creation: [ 107.601192] kasan_save_stack+0x22/0x50 [ 107.601692] __kasan_record_aux_stack+0x8e/0xa0 [ 107.602278] __call_rcu_common.constprop.0+0x6a/0xb90 [ 107.602992] remove_vma+0x139/0x170 [ 107.603444] do_vmi_align_munmap+0xd4a/0x11f0 [ 107.603995] do_vmi_munmap+0x1f1/0x2b0 [ 107.604475] __vm_munmap+0x138/0x3a0 [ 107.604940] __x64_sys_munmap+0x59/0x80 [ 107.605433] do_syscall_64+0x3f/0x90 [ 107.605904] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 107.606551] [ 107.606764] The buggy address belongs to the object at ffff88800c5de658 [ 107.606764] which belongs to the cache vm_area_struct of size 168 [ 107.608220] The buggy address is located 88 bytes inside of [ 107.608220] freed 168-byte region [ffff88800c5de658, ffff88800c5de700) [ 107.609612] [ 107.609825] The buggy address belongs to the physical page: [ 107.610492] page:0000000017ebc3f2 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800c5de1d0 pfn:0xc5de [ 107.611700] memcg:ffff88800dff9d01 [ 107.612125] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 107.612811] page_type: 0xffffffff() [ 107.613259] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 107.614173] raw: ffff88800c5de1d0 000000008011000f 00000001ffffffff ffff88800dff9d01 [ 107.615061] page dumped because: kasan: bad access detected [ 107.615714] [ 107.615931] Memory state around the buggy address: [ 107.616505] ffff88800c5de580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 107.617345] ffff88800c5de600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 107.618206] >ffff88800c5de680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 107.619047] ^ [ 107.619634] ffff88800c5de700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 107.620479] ffff88800c5de780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 107.621334] ================================================================== [ 107.622257] Disabling lock debugging due to kernel taint [ 110.016849] BUG: Bad rss-counter state mm:00000000c6c3b6be type:MM_FILEPAGES val:33 [ 110.018053] BUG: Bad rss-counter state mm:00000000c6c3b6be type:MM_ANONPAGES val:22 [ 110.421349] BUG: Bad rss-counter state mm:0000000088c006eb type:MM_FILEPAGES val:33 [ 110.422625] BUG: Bad rss-counter state mm:0000000088c006eb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11409' (ECDSA) to the list of known hosts. 2023/06/20 07:01:59 fuzzer started 2023/06/20 07:02:00 dialing manager at localhost:44161 2023/06/20 07:02:00 checking machine... 2023/06/20 07:02:00 checking revisions... [ 111.141907] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:02:00 testing simple program... [ 111.188494] cgroup: Unknown subsys name 'net' [ 111.239940] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:00:43 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000023e1d7b1 RCX=ffffffff81b2af94 RDX=ffff888015a0b680 RSI=00000000000000a0 RDI=0000000000000005 RBP=ffff88801657d1f0 RSP=ffff88800bed7728 R8 =0000000000000005 R9 =0000000000000093 R10=00000000000000a0 R11=00000000000b6c88 R12=ffff8880101c9100 R13=00000000000000a0 R14=ffff88801657cf90 R15=0000000000000000 RIP=ffffffff814c07e4 RFL=00000212 [----A--] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f96bf6e6900 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=00007f96beb03890 CR3=000000000d400000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=8b1ec790e216399800000000000ae988 XMM05=057c9ab8b2c2b1620000000000144910 XMM06=4fda316b135da52b0000000000143700 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f9438bd8618 CR3=00000000161da000 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=2039353a31303a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a31303a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000