[ 60.647989] BUG: Bad rss-counter state mm:00000000fa8267bf type:MM_FILEPAGES val:33 [ 60.648951] BUG: Bad rss-counter state mm:00000000fa8267bf type:MM_ANONPAGES val:22 [ 60.808233] ================================================================== [ 60.809133] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.810003] Read of size 8 at addr ffff888019ea9310 by task sshd/226 [ 60.810728] [ 60.810937] CPU: 1 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 60.811918] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.812835] Call Trace: [ 60.813138] [ 60.813408] dump_stack_lvl+0x91/0xf0 [ 60.813876] print_report+0xcc/0x620 [ 60.814339] ? __virt_addr_valid+0x102/0x340 [ 60.814899] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.815495] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.816095] kasan_report+0xbe/0xf0 [ 60.816556] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.817161] vma_interval_tree_remove+0xc75/0xec0 [ 60.817751] vma_prepare+0xc54/0x11a0 [ 60.818225] __split_vma+0x5af/0x950 [ 60.818692] ? __pfx___split_vma+0x10/0x10 [ 60.819214] ? find_held_lock+0x2c/0x110 [ 60.819721] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.820267] ? lock_is_held_type+0x9f/0x120 [ 60.820796] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.821384] ? mtree_range_walk+0x632/0x900 [ 60.821930] ? mas_walk+0x5c7/0x7c0 [ 60.822390] do_vmi_munmap+0x1f1/0x2b0 [ 60.822885] mmap_region+0x1f9/0x2660 [ 60.823351] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.823853] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.824549] ? __pfx_lock_acquire+0x10/0x10 [ 60.825069] ? __pfx_mmap_region+0x10/0x10 [ 60.825594] ? security_mmap_addr+0x7d/0xa0 [ 60.826112] ? get_unmapped_area+0x1f5/0x3f0 [ 60.826659] do_mmap+0x854/0xf00 [ 60.827087] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.827569] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.828124] ksys_mmap_pgoff+0x3af/0x500 [ 60.828617] do_syscall_64+0x3f/0x90 [ 60.829090] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.829712] RIP: 0033:0x7f87b424ed82 [ 60.830160] 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 [ 60.832238] RSP: 002b:00007ffed97122e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.833133] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f87b424ed82 [ 60.833959] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f87b3688000 [ 60.834799] RBP: 00007f87b3688000 R08: 0000000000000009 R09: 0000000000001000 [ 60.835632] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f897e10ec0 [ 60.836449] R13: 00007ffed9712300 R14: 00007ffed9712330 R15: 00007ffed9712690 [ 60.837286] [ 60.837572] [ 60.837779] Allocated by task 219: [ 60.838197] kasan_save_stack+0x22/0x50 [ 60.838694] kasan_set_track+0x25/0x30 [ 60.839174] __kasan_slab_alloc+0x59/0x70 [ 60.839688] kmem_cache_alloc+0x16b/0x370 [ 60.840202] vm_area_dup+0x20/0x160 [ 60.840653] __split_vma+0x170/0x950 [ 60.841109] split_vma+0xc6/0x110 [ 60.841528] mprotect_fixup+0x8d2/0xb30 [ 60.842016] do_mprotect_pkey+0x87e/0xd40 [ 60.842545] __x64_sys_mprotect+0x78/0xc0 [ 60.843061] do_syscall_64+0x3f/0x90 [ 60.843527] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.844141] [ 60.844367] Freed by task 219: [ 60.844751] kasan_save_stack+0x22/0x50 [ 60.845239] kasan_set_track+0x25/0x30 [ 60.845721] kasan_save_free_info+0x2b/0x50 Debian GNU/Li[ 60.846240] __kasan_slab_free+0x10a/0x190 [ 60.847076] kmem_cache_free+0x10d/0x4d0 [ 60.847562] rcu_core+0x8c8/0x2860 [ 60.847998] __do_softirq+0x1b7/0x7d4 [ 60.848460] [ 60.848672] Last potentially related work creation: [ 60.849238] kasan_save_stack+0x22/0x50 [ 60.849734] __kasan_record_aux_stack+0x8e/0xa0 [ 60.850287] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.850930] remove_vma+0x139/0x170 [ 60.851373] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.851926] do_vmi_munmap+0x1f1/0x2b0 [ 60.852401] __vm_munmap+0x138/0x3a0 [ 60.852955] __x64_sys_munmap+0x59/0x80 [ 60.853443] do_syscall_64+0x3f/0x90 [ 60.853908] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.854535] [ 60.854752] The buggy address belongs to the object at ffff888019ea92b8 [ 60.854752] which belongs to the cache vm_area_struct of size 168 [ 60.856186] The buggy address is located 88 bytes inside of [ 60.856186] freed 168-byte region [ffff888019ea92b8, ffff888019ea9360) [ 60.857564] [ 60.857771] The buggy address belongs to the physical page: [ 60.858398] page:00000000ff956c2c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19ea9 [ 60.859471] memcg:ffff88800fb5ec01 [ 60.859885] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.860518] page_type: 0xffffffff() [ 60.860956] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 60.861852] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fb5ec01 [ 60.862749] page dumped because: kasan: bad access detected [ 60.863383] [ 60.863594] Memory state around the buggy address: [ 60.864155] ffff888019ea9200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 60.864983] ffff888019ea9280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 60.865824] >ffff888019ea9300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 60.866657] ^ [ 60.867106] ffff888019ea9380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 60.867941] ffff888019ea9400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 60.868779] ================================================================== nux 11 syzkaller ttyS0 syzkaller login: [ 60.870244] Disabling lock debugging due to kernel taint [ 63.324570] BUG: Bad rss-counter state mm:0000000041dc2cc9 type:MM_FILEPAGES val:33 [ 63.325736] BUG: Bad rss-counter state mm:0000000041dc2cc9 type:MM_ANONPAGES val:22 [ 63.814235] BUG: Bad rss-counter state mm:000000003ba81429 type:MM_FILEPAGES val:33 [ 63.815450] BUG: Bad rss-counter state mm:000000003ba81429 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46470' (ECDSA) to the list of known hosts. 2023/06/19 22:13:36 fuzzer started 2023/06/19 22:13:36 dialing manager at localhost:44161 2023/06/19 22:13:36 checking machine... 2023/06/19 22:13:36 checking revisions... [ 64.472945] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:13:36 testing simple program... [ 64.514173] cgroup: Unknown subsys name 'net' [ 64.560344] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:13:35 Registers: info registers vcpu 0 RAX=ffff88801660f828 RBX=ffff88800c9dd130 RCX=ffffffff812e00e5 RDX=0000000000000001 RSI=0000000000000004 RDI=ffff88801660f828 RBP=1ffff11002cc1f01 RSP=ffff88801660f7f0 R8 =0000000000000001 R9 =ffffed100193ba26 R10=ffff88800c9dd133 R11=0000000000000000 R12=ffff88800c9dd138 R13=ffff88800c9dd140 R14=ffffffff83677d2f R15=0000000000000014 RIP=ffffffff8180eeb6 RFL=00000002 [-------] 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 00007f5851365900 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=00007f585191c618 CR3=0000000019c7a000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 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=0000000000000001 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=00007f7385fa7740 CR3=000000001030c000 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=672fec5f3c7e408cc94e119d26207463 XMM02=2c67c8bc2e329bc3000000000011e550 XMM03=fb795ef6d65770560000000000124758 XMM04=f924096b9a9f5df100000000000ae988 XMM05=9c7295d954595c6300000000001351d8 XMM06=13e856d8d71426c80000000000133f08 XMM07=e042d86d42eb936e0000000000124a30 XMM08=6791018469740be4000000000011e5b0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000