syzkaller login: [ 28.895020] BUG: Bad rss-counter state mm:00000000018337af type:MM_FILEPAGES val:33 [ 28.896233] BUG: Bad rss-counter state mm:00000000018337af type:MM_ANONPAGES val:22 [ 29.059224] ================================================================== [ 29.060140] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.061104] Read of size 8 at addr ffff88800dab44e0 by task sshd/219 [ 29.061872] [ 29.062089] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.063124] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.064099] Call Trace: [ 29.064420] [ 29.064706] dump_stack_lvl+0x91/0xf0 [ 29.065209] print_report+0xcc/0x620 [ 29.065690] ? __virt_addr_valid+0x102/0x340 [ 29.066238] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.066856] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.067472] kasan_report+0xbe/0xf0 [ 29.067946] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.068579] vma_interval_tree_remove+0xc75/0xec0 [ 29.069417] vma_prepare+0xc54/0x11a0 [ 29.069940] __split_vma+0x5af/0x950 [ 29.070437] ? __pfx___split_vma+0x10/0x10 [ 29.070971] ? find_held_lock+0x2c/0x110 [ 29.071497] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.072066] ? lock_is_held_type+0x9f/0x120 [ 29.072607] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.073230] ? mtree_range_walk+0x632/0x900 [ 29.073778] ? mas_walk+0x5c7/0x7c0 [ 29.074260] do_vmi_munmap+0x1f1/0x2b0 [ 29.074748] mmap_region+0x1f9/0x2660 [ 29.075251] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.075769] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.076502] ? __pfx_lock_acquire+0x10/0x10 [ 29.077043] ? __pfx_mmap_region+0x10/0x10 [ 29.077580] ? security_mmap_addr+0x7d/0xa0 [ 29.078108] ? get_unmapped_area+0x1f5/0x3f0 [ 29.078665] do_mmap+0x854/0xf00 [ 29.079105] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.079600] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.080158] ksys_mmap_pgoff+0x3af/0x500 [ 29.080658] do_syscall_64+0x3f/0x90 [ 29.081167] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.081907] RIP: 0033:0x7f5baa9d2d82 [ 29.082364] 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 [ 29.084507] RSP: 002b:00007fff46dd6db8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.085427] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5baa9d2d82 [ 29.086298] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5ba9e0c000 [ 29.087162] RBP: 00007f5ba9e0c000 R08: 0000000000000009 R09: 0000000000001000 [ 29.088119] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563eede7bb20 [ 29.089045] R13: 00007fff46dd6dd0 R14: 00007fff46dd6e00 R15: 00007fff46dd7160 [ 29.089904] [ 29.090197] [ 29.090435] Allocated by task 212: [ 29.090870] kasan_save_stack+0x22/0x50 [ 29.091382] kasan_set_track+0x25/0x30 [ 29.091878] __kasan_slab_alloc+0x59/0x70 [ 29.092404] kmem_cache_alloc+0x16b/0x370 [ 29.092934] vm_area_dup+0x20/0x160 [ 29.093402] __split_vma+0x170/0x950 [ 29.093870] split_vma+0xc6/0x110 [ 29.094307] mprotect_fixup+0x8d2/0xb30 [ 29.094815] do_mprotect_pkey+0x87e/0xd40 [ 29.095334] __x64_sys_mprotect+0x78/0xc0 [ 29.095850] do_syscall_64+0x3f/0x90 [ 29.096327] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.096975] [ 29.097188] Freed by task 212: [ 29.097590] kasan_save_stack+0x22/0x50 [ 29.098092] kasan_set_track+0x25/0x30 [ 29.098591] kasan_save_free_info+0x2b/0x50 [ 29.099128] __kasan_slab_free+0x10a/0x190 [ 29.099660] kmem_cache_free+0x10d/0x4d0 [ 29.100168] rcu_core+0x8c8/0x2860 [ 29.100614] __do_softirq+0x1b7/0x7d4 [ 29.101116] [ 29.101336] Last potentially related work creation: [ 29.101931] kasan_save_stack+0x22/0x50 [ 29.102432] __kasan_record_aux_stack+0x8e/0xa0 [ 29.103005] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.103647] remove_vma+0x139/0x170 [ 29.104099] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.104654] do_vmi_munmap+0x1f1/0x2b0 [ 29.105152] __vm_munmap+0x138/0x3a0 [ 29.105618] __x64_sys_munmap+0x59/0x80 [ 29.106110] do_syscall_64+0x3f/0x90 [ 29.106588] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.107231] [ 29.107448] Second to last potentially related work creation: [ 29.108132] kasan_save_stack+0x22/0x50 [ 29.108638] __kasan_record_aux_stack+0x8e/0xa0 [ 29.109240] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.109881] remove_vma+0x139/0x170 [ 29.110340] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.110921] do_vmi_munmap+0x1f1/0x2b0 [ 29.111431] mmap_region+0x1f9/0x2660 [ 29.111924] do_mmap+0x854/0xf00 [ 29.112367] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.112874] ksys_mmap_pgoff+0x3af/0x500 [ 29.113391] do_syscall_64+0x3f/0x90 [ 29.113881] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.114546] [ 29.114766] The buggy address belongs to the object at ffff88800dab4488 [ 29.114766] which belongs to the cache vm_area_struct of size 168 [ 29.116285] The buggy address is located 88 bytes inside of [ 29.116285] freed 168-byte region [ffff88800dab4488, ffff88800dab4530) [ 29.117758] [ 29.117978] The buggy address belongs to the physical page: [ 29.118665] page:000000007a59eb20 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdab4 [ 29.119790] memcg:ffff88800dc22901 [ 29.120234] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.120902] page_type: 0xffffffff() [ 29.121367] raw: 0100000000000200 ffff8880087a0c80 ffffea0000399840 dead00000000000c [ 29.122325] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc22901 [ 29.123269] page dumped because: kasan: bad access detected [ 29.123961] [ 29.124182] Memory state around the buggy address: [ 29.124798] ffff88800dab4380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.125690] ffff88800dab4400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 29.126583] >ffff88800dab4480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.127471] ^ [ 29.128259] ffff88800dab4500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 29.129152] ffff88800dab4580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.130074] ================================================================== [ 29.131333] Disabling lock debugging due to kernel taint [ 31.124597] BUG: Bad rss-counter state mm:00000000c016b895 type:MM_FILEPAGES val:33 [ 31.125860] BUG: Bad rss-counter state mm:00000000c016b895 type:MM_ANONPAGES val:22 [ 31.543693] BUG: Bad rss-counter state mm:0000000076802c43 type:MM_FILEPAGES val:33 [ 31.544996] BUG: Bad rss-counter state mm:0000000076802c43 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31716' (ECDSA) to the list of known hosts. 2023/06/20 15:52:36 fuzzer started 2023/06/20 15:52:37 dialing manager at localhost:36067 2023/06/20 15:52:37 checking machine... 2023/06/20 15:52:37 checking revisions... [ 32.268393] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:52:37 testing simple program... [ 32.320857] cgroup: Unknown subsys name 'net' [ 32.383017] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:52:36 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff81851e74 RDX=ffffed1002be36ca RSI=0000000000000004 RDI=ffff888015f1b64c RBP=ffff88800ed64500 RSP=ffff88800f1ffa90 R8 =0000000000000001 R9 =ffffed1002be36c9 R10=ffff888015f1b64f R11=0000000000000001 R12=0000000000000001 R13=ffff88800ed64680 R14=ffff888015f1b438 R15=0000000000000001 RIP=ffffffff81851e7c 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 00007faf24a15900 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=00007faf24fcd0b0 CR3=000000000effe000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f449aaba7d0 CR3=000000000c96e000 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=ef6f9f9fc0c2f18061408d2a1ed1e465 XMM02=2c67c8bc2e329bc3000000000011a618 XMM03=fb795ef6d65770560000000000121368 XMM04=07698a014ba4c4c000000000000ae988 XMM05=19e9129bd510f2350000000000132e40 XMM06=976d45f55c4dc98b0000000000131c88 XMM07=e042d86d42eb936e0000000000121640 XMM08=06669de575e685eb000000000011a678 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000