syzkaller login: [ 30.514056] BUG: Bad rss-counter state mm:00000000411f768c type:MM_FILEPAGES val:33 [ 30.515171] BUG: Bad rss-counter state mm:00000000411f768c type:MM_ANONPAGES val:22 [ 30.674243] ================================================================== [ 30.675362] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.676314] Read of size 8 at addr ffff88800f63e880 by task sshd/221 [ 30.677141] [ 30.677379] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.678242] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.679256] Call Trace: [ 30.679583] [ 30.679870] dump_stack_lvl+0x91/0xf0 [ 30.680367] print_report+0xcc/0x620 [ 30.680867] ? __virt_addr_valid+0x102/0x340 [ 30.681420] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.682044] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.682659] kasan_report+0xbe/0xf0 [ 30.683154] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.683781] vma_interval_tree_remove+0xc75/0xec0 [ 30.684392] vma_prepare+0xc54/0x11a0 [ 30.684872] __split_vma+0x5af/0x950 [ 30.685347] ? __pfx___split_vma+0x10/0x10 [ 30.685879] ? find_held_lock+0x2c/0x110 [ 30.686424] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.687012] ? lock_is_held_type+0x9f/0x120 [ 30.687558] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.688170] ? mtree_range_walk+0x632/0x900 [ 30.688732] ? mas_walk+0x5c7/0x7c0 [ 30.689215] do_vmi_munmap+0x1f1/0x2b0 [ 30.689715] mmap_region+0x1f9/0x2660 [ 30.690211] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.690731] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.691482] ? __pfx_lock_acquire+0x10/0x10 [ 30.692024] ? __pfx_mmap_region+0x10/0x10 [ 30.692556] ? security_mmap_addr+0x7d/0xa0 [ 30.693092] ? get_unmapped_area+0x1f5/0x3f0 [ 30.693653] do_mmap+0x854/0xf00 [ 30.694106] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.694609] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.695209] ksys_mmap_pgoff+0x3af/0x500 [ 30.695718] do_syscall_64+0x3f/0x90 [ 30.696203] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.696856] RIP: 0033:0x7fb37ed37d82 [ 30.697324] 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 [ 30.699501] RSP: 002b:00007ffe51f55688 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.700422] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb37ed37d82 [ 30.701284] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb37e171000 [ 30.702141] RBP: 00007fb37e171000 R08: 0000000000000009 R09: 0000000000001000 [ 30.703009] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fc62e62ec0 [ 30.703871] R13: 00007ffe51f556a0 R14: 00007ffe51f556d0 R15: 00007ffe51f55a30 [ 30.704765] [ 30.705060] [ 30.705284] Allocated by task 214: [ 30.705710] kasan_save_stack+0x22/0x50 [ 30.706231] kasan_set_track+0x25/0x30 [ 30.706733] __kasan_slab_alloc+0x59/0x70 [ 30.707258] kmem_cache_alloc+0x16b/0x370 [ 30.707779] vm_area_dup+0x20/0x160 [ 30.708236] __split_vma+0x170/0x950 [ 30.708699] split_vma+0xc6/0x110 [ 30.709140] mprotect_fixup+0x8d2/0xb30 [ 30.709642] do_mprotect_pkey+0x87e/0xd40 [ 30.710159] __x64_sys_mprotect+0x78/0xc0 [ 30.710692] do_syscall_64+0x3f/0x90 [ 30.711187] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.711830] [ 30.712048] Freed by task 214: [ 30.712443] kasan_save_stack+0x22/0x50 [ 30.712951] kasan_set_track+0x25/0x30 [ 30.713442] kasan_save_free_info+0x2b/0x50 [ 30.713978] __kasan_slab_free+0x10a/0x190 [ 30.714526] kmem_cache_free+0x10d/0x4d0 [ 30.715045] rcu_core+0x8c8/0x2860 [ 30.715482] __do_softirq+0x1b7/0x7d4 [ 30.715960] [ 30.716174] Last potentially related work creation: [ 30.716761] kasan_save_stack+0x22/0x50 [ 30.717278] __kasan_record_aux_stack+0x8e/0xa0 [ 30.717849] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.718545] remove_vma+0x139/0x170 [ 30.719019] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.719584] do_vmi_munmap+0x1f1/0x2b0 [ 30.720067] __vm_munmap+0x138/0x3a0 [ 30.720533] __x64_sys_munmap+0x59/0x80 [ 30.721032] do_syscall_64+0x3f/0x90 [ 30.721502] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.722145] [ 30.722359] The buggy address belongs to the object at ffff88800f63e828 [ 30.722359] which belongs to the cache vm_area_struct of size 168 [ 30.723866] The buggy address is located 88 bytes inside of [ 30.723866] freed 168-byte region [ffff88800f63e828, ffff88800f63e8d0) [ 30.725282] [ 30.725496] The buggy address belongs to the physical page: [ 30.726164] page:00000000c2459118 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf63e [ 30.727259] memcg:ffff88800d4b2201 [ 30.727686] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.728324] page_type: 0xffffffff() [ 30.728776] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.729709] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d4b2201 [ 30.730614] page dumped because: kasan: bad access detected [ 30.731297] [ 30.731514] Memory state around the buggy address: [ 30.732098] ffff88800f63e780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.732965] ffff88800f63e800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.733827] >ffff88800f63e880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.734672] ^ [ 30.735094] ffff88800f63e900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.735959] ffff88800f63e980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.736809] ================================================================== [ 30.737723] Disabling lock debugging due to kernel taint [ 33.283847] BUG: Bad rss-counter state mm:000000000591b6a0 type:MM_FILEPAGES val:33 [ 33.285109] BUG: Bad rss-counter state mm:000000000591b6a0 type:MM_ANONPAGES val:22 [ 33.753941] BUG: Bad rss-counter state mm:00000000494e046a type:MM_FILEPAGES val:33 [ 33.755137] BUG: Bad rss-counter state mm:00000000494e046a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42172' (ECDSA) to the list of known hosts. 2023/06/20 11:29:38 fuzzer started 2023/06/20 11:29:38 dialing manager at localhost:36067 2023/06/20 11:29:38 checking machine... 2023/06/20 11:29:38 checking revisions... [ 34.432164] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:29:38 testing simple program... [ 34.487978] cgroup: Unknown subsys name 'net' [ 34.524550] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:29:37 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007fc057f10f60 CR3=000000000dc82000 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=2037333a39323a3131203032206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a39323a3131203032 XMM08=20303d64696720303d64697520612f6e XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800e36b260 RCX=ffff88800e36b260 RDX=00000000800d0005 RSI=ffff88800e36b260 RDI=ffff88800844f780 RBP=ffff888016d4fa28 RSP=ffff888016d4f990 R8 =00000000800d0004 R9 =0000000000000000 R10=ffffea000038dac0 R11=00000000800d0005 R12=ffffea000038dac0 R13=ffff88800e36b980 R14=00000000800d0004 R15=ffff88800844f780 RIP=ffffffff81809672 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 00007fd50aced900 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=000055cf41c02954 CR3=000000001a348000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000