syzkaller login: [ 30.577917] BUG: Bad rss-counter state mm:00000000926fab80 type:MM_FILEPAGES val:33 [ 30.579110] BUG: Bad rss-counter state mm:00000000926fab80 type:MM_ANONPAGES val:22 [ 30.744720] ================================================================== [ 30.745712] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.746635] Read of size 8 at addr ffff888016d02c20 by task sshd/219 [ 30.747527] [ 30.747749] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.748622] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.749605] Call Trace: [ 30.749930] [ 30.750219] dump_stack_lvl+0x91/0xf0 [ 30.750715] print_report+0xcc/0x620 [ 30.751198] ? __virt_addr_valid+0x102/0x340 [ 30.751751] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.752371] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.752998] kasan_report+0xbe/0xf0 [ 30.753472] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.754106] vma_interval_tree_remove+0xc75/0xec0 [ 30.754723] vma_prepare+0xc54/0x11a0 [ 30.755201] __split_vma+0x5af/0x950 [ 30.755674] ? __pfx___split_vma+0x10/0x10 [ 30.756200] ? find_held_lock+0x2c/0x110 [ 30.756743] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.757313] ? lock_is_held_type+0x9f/0x120 [ 30.757857] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.758466] ? mtree_range_walk+0x632/0x900 [ 30.759018] ? mas_walk+0x5c7/0x7c0 [ 30.759488] do_vmi_munmap+0x1f1/0x2b0 [ 30.759985] mmap_region+0x1f9/0x2660 [ 30.760481] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.760996] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.761715] ? __pfx_lock_acquire+0x10/0x10 [ 30.762248] ? __pfx_mmap_region+0x10/0x10 [ 30.762784] ? security_mmap_addr+0x7d/0xa0 [ 30.763320] ? get_unmapped_area+0x1f5/0x3f0 [ 30.763872] do_mmap+0x854/0xf00 [ 30.764311] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.764829] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.765384] ksys_mmap_pgoff+0x3af/0x500 [ 30.765897] do_syscall_64+0x3f/0x90 [ 30.766389] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.767030] RIP: 0033:0x7f92cfc15d82 [ 30.767485] 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 [ 30.769647] RSP: 002b:00007ffd1931cd08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.770575] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f92cfc15d82 [ 30.771426] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f92cf04f000 [ 30.772269] RBP: 00007f92cf04f000 R08: 0000000000000009 R09: 0000000000001000 [ 30.773125] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f9c639eec0 [ 30.773976] R13: 00007ffd1931cd20 R14: 00007ffd1931cd50 R15: 00007ffd1931d0b0 [ 30.774830] [ 30.775122] [ 30.775335] Allocated by task 212: [ 30.775767] kasan_save_stack+0x22/0x50 [ 30.776278] kasan_set_track+0x25/0x30 [ 30.776799] __kasan_slab_alloc+0x59/0x70 [ 30.777322] kmem_cache_alloc+0x16b/0x370 [ 30.777840] vm_area_dup+0x20/0x160 [ 30.778298] __split_vma+0x170/0x950 [ 30.778777] split_vma+0xc6/0x110 [ 30.779216] mprotect_fixup+0x8d2/0xb30 [ 30.779718] do_mprotect_pkey+0x87e/0xd40 [ 30.780248] __x64_sys_mprotect+0x78/0xc0 [ 30.780783] do_syscall_64+0x3f/0x90 [ 30.781253] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.781906] [ 30.782124] Freed by task 13: [ 30.782520] kasan_save_stack+0x22/0x50 [ 30.783026] kasan_set_track+0x25/0x30 [ 30.783516] kasan_save_free_info+0x2b/0x50 [ 30.784047] __kasan_slab_free+0x10a/0x190 [ 30.784588] kmem_cache_free+0x10d/0x4d0 [ 30.785093] rcu_core+0x8c8/0x2860 [ 30.785539] __do_softirq+0x1b7/0x7d4 [ 30.786016] [ 30.786230] Last potentially related work creation: [ 30.786817] kasan_save_stack+0x22/0x50 [ 30.787320] __kasan_record_aux_stack+0x8e/0xa0 [ 30.787891] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.788545] remove_vma+0x139/0x170 [ 30.789019] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.789576] do_vmi_munmap+0x1f1/0x2b0 [ 30.790064] __vm_munmap+0x138/0x3a0 [ 30.790532] __x64_sys_munmap+0x59/0x80 [ 30.791031] do_syscall_64+0x3f/0x90 [ 30.791503] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.792141] [ 30.792359] The buggy address belongs to the object at ffff888016d02bc8 [ 30.792359] which belongs to the cache vm_area_struct of size 168 [ 30.793828] The buggy address is located 88 bytes inside of [ 30.793828] freed 168-byte region [ffff888016d02bc8, ffff888016d02c70) [ 30.795218] [ 30.795441] The buggy address belongs to the physical page: [ 30.796100] page:00000000bd166dd6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16d02 [ 30.797205] memcg:ffff88800ec16e01 [ 30.797635] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.798307] page_type: 0xffffffff() [ 30.798767] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.799708] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec16e01 [ 30.800677] page dumped because: kasan: bad access detected [ 30.801347] [ 30.801568] Memory state around the buggy address: [ 30.802158] ffff888016d02b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.803035] ffff888016d02b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.803900] >ffff888016d02c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.804772] ^ [ 30.805321] ffff888016d02c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.806202] ffff888016d02d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.807102] ================================================================== [ 30.808186] Disabling lock debugging due to kernel taint [ 32.659419] BUG: Bad rss-counter state mm:00000000612dde85 type:MM_FILEPAGES val:33 [ 32.660638] BUG: Bad rss-counter state mm:00000000612dde85 type:MM_ANONPAGES val:22 [ 33.089900] BUG: Bad rss-counter state mm:0000000013b48124 type:MM_FILEPAGES val:33 [ 33.091060] BUG: Bad rss-counter state mm:0000000013b48124 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1883' (ECDSA) to the list of known hosts. 2023/06/20 01:04:08 fuzzer started 2023/06/20 01:04:08 dialing manager at localhost:44161 2023/06/20 01:04:08 checking machine... 2023/06/20 01:04:08 checking revisions... [ 33.713454] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:04:08 testing simple program... [ 33.757022] cgroup: Unknown subsys name 'net' [ 33.800085] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:04:07 Registers: info registers vcpu 0 RAX=ffff888016f17c90 RBX=dffffc0000000000 RCX=0000000000000001 RDX=ffff88800ec5f800 RSI=0000000000000002 RDI=ffff888019051318 RBP=ffff888019051318 RSP=ffff888016f17c68 R8 =0000000000000003 R9 =0000000000004000 R10=0000000000008000 R11=00000000000b6996 R12=0000000000000001 R13=0000000000000002 R14=ffff88800ec5f800 R15=ffff8880192fbe20 RIP=ffffffff8198b482 RFL=00000292 [--S-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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ff40cc7a700 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=00007fb1e5cbe618 CR3=0000000015840000 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=2037303a34303a3130203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037303a34303a3130203032 XMM08=3d64696720303d64697520612f6e3d64 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888008d751c0 RSI=ffffffff813bdc40 RDI=0000000000000006 RBP=ffff88806cf2c250 RSP=ffff88806cf09df8 R8 =0000000000000006 R9 =00000000000f4240 R10=00000007ab04f580 R11=ffff88806cf09ff8 R12=00000007aaf5d17c R13=00000007ab04f580 R14=0000000000000001 R15=00000007aaf5b340 RIP=ffffffff813bdc4b RFL=00000092 [--S-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 =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=00007ff73405b1c0 CR3=000000000d7d4000 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=04f08d46e90416a910491b69c03a2589 XMM02=2c67c8bc2e329bc3000000000011c6d8 XMM03=fb795ef6d65770560000000000123b40 XMM04=6934620cb2bed35800000000000ae988 XMM05=dfcdbad4f1609c370000000000133628 XMM06=756861205b7319a60000000000132490 XMM07=e042d86d42eb936e0000000000123dc0 XMM08=35b9773413707a56000000000011c738 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000