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| author | Julian Anastasov <ja@ssi.bg> | 2026-04-30 10:44:18 +0300 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2026-05-05 02:52:55 +0300 |
| commit | 4ee52b7021a7cb9356f8b9aff5631c68512a9e1b (patch) | |
| tree | 1b57cd1e57fb5e06583d77c262cd0b64a0ae2bb3 /include/linux/pgalloc.h | |
| parent | 2fd109238925d53c44ea409df0558844af7877b8 (diff) | |
| download | linux-4ee52b7021a7cb9356f8b9aff5631c68512a9e1b.tar.xz | |
ipvs: fix shift-out-of-bounds in ip_vs_rht_desired_size
Calling roundup_pow_of_two() with 0 has undefined result:
UBSAN: shift-out-of-bounds in ./include/linux/log2.h:57:13
shift exponent 64 is too large for 64-bit type 'unsigned long'
CPU: 1 UID: 0 PID: 77 Comm: kworker/u8:4 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
Workqueue: events_unbound conn_resize_work_handler
Call Trace:
<TASK>
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
ubsan_epilogue+0xa/0x30 lib/ubsan.c:233
__ubsan_handle_shift_out_of_bounds+0x385/0x410 lib/ubsan.c:494
__roundup_pow_of_two include/linux/log2.h:57 [inline]
ip_vs_rht_desired_size+0x2cf/0x410 net/netfilter/ipvs/ip_vs_core.c:240
ip_vs_conn_desired_size net/netfilter/ipvs/ip_vs_conn.c:765 [inline]
conn_resize_work_handler+0x1b6/0x14c0 net/netfilter/ipvs/ip_vs_conn.c:822
process_one_work kernel/workqueue.c:3302 [inline]
process_scheduled_works+0xb5d/0x1860 kernel/workqueue.c:3385
worker_thread+0xa53/0xfc0 kernel/workqueue.c:3466
kthread+0x388/0x470 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
</TASK>
Reported-by: syzbot+217f1db9c791e27fe54a@syzkaller.appspotmail.com
Fixes: b655388111cf ("ipvs: add resizable hash tables")
Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'include/linux/pgalloc.h')
0 files changed, 0 insertions, 0 deletions